| // Copyright 2016 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| // Lowering arithmetic |
| (Add(64|Ptr) ...) => (ADD ...) |
| (Add(32|16|8) ...) => (ADDW ...) |
| (Add32F x y) => (Select0 (FADDS x y)) |
| (Add64F x y) => (Select0 (FADD x y)) |
| |
| (Sub(64|Ptr) ...) => (SUB ...) |
| (Sub(32|16|8) ...) => (SUBW ...) |
| (Sub32F x y) => (Select0 (FSUBS x y)) |
| (Sub64F x y) => (Select0 (FSUB x y)) |
| |
| (Mul64 ...) => (MULLD ...) |
| (Mul(32|16|8) ...) => (MULLW ...) |
| (Mul32F ...) => (FMULS ...) |
| (Mul64F ...) => (FMUL ...) |
| (Mul64uhilo ...) => (MLGR ...) |
| |
| (Div32F ...) => (FDIVS ...) |
| (Div64F ...) => (FDIV ...) |
| |
| (Div64 x y) => (DIVD x y) |
| (Div64u ...) => (DIVDU ...) |
| // DIVW/DIVWU has a 64-bit dividend and a 32-bit divisor, |
| // so a sign/zero extension of the dividend is required. |
| (Div32 x y) => (DIVW (MOVWreg x) y) |
| (Div32u x y) => (DIVWU (MOVWZreg x) y) |
| (Div16 x y) => (DIVW (MOVHreg x) (MOVHreg y)) |
| (Div16u x y) => (DIVWU (MOVHZreg x) (MOVHZreg y)) |
| (Div8 x y) => (DIVW (MOVBreg x) (MOVBreg y)) |
| (Div8u x y) => (DIVWU (MOVBZreg x) (MOVBZreg y)) |
| |
| (Hmul(64|64u) ...) => (MULH(D|DU) ...) |
| (Hmul32 x y) => (SRDconst [32] (MULLD (MOVWreg x) (MOVWreg y))) |
| (Hmul32u x y) => (SRDconst [32] (MULLD (MOVWZreg x) (MOVWZreg y))) |
| |
| (Mod64 x y) => (MODD x y) |
| (Mod64u ...) => (MODDU ...) |
| // MODW/MODWU has a 64-bit dividend and a 32-bit divisor, |
| // so a sign/zero extension of the dividend is required. |
| (Mod32 x y) => (MODW (MOVWreg x) y) |
| (Mod32u x y) => (MODWU (MOVWZreg x) y) |
| (Mod16 x y) => (MODW (MOVHreg x) (MOVHreg y)) |
| (Mod16u x y) => (MODWU (MOVHZreg x) (MOVHZreg y)) |
| (Mod8 x y) => (MODW (MOVBreg x) (MOVBreg y)) |
| (Mod8u x y) => (MODWU (MOVBZreg x) (MOVBZreg y)) |
| |
| // (x + y) / 2 with x>=y -> (x - y) / 2 + y |
| (Avg64u <t> x y) => (ADD (SRDconst <t> (SUB <t> x y) [1]) y) |
| |
| (And64 ...) => (AND ...) |
| (And(32|16|8) ...) => (ANDW ...) |
| |
| (Or64 ...) => (OR ...) |
| (Or(32|16|8) ...) => (ORW ...) |
| |
| (Xor64 ...) => (XOR ...) |
| (Xor(32|16|8) ...) => (XORW ...) |
| |
| (Neg64 ...) => (NEG ...) |
| (Neg(32|16|8) ...) => (NEGW ...) |
| (Neg32F ...) => (FNEGS ...) |
| (Neg64F ...) => (FNEG ...) |
| |
| (Com64 ...) => (NOT ...) |
| (Com(32|16|8) ...) => (NOTW ...) |
| (NOT x) => (XOR (MOVDconst [-1]) x) |
| (NOTW x) => (XORWconst [-1] x) |
| |
| // Lowering boolean ops |
| (AndB ...) => (ANDW ...) |
| (OrB ...) => (ORW ...) |
| (Not x) => (XORWconst [1] x) |
| |
| // Lowering pointer arithmetic |
| (OffPtr [off] ptr:(SP)) => (MOVDaddr [int32(off)] ptr) |
| (OffPtr [off] ptr) && is32Bit(off) => (ADDconst [int32(off)] ptr) |
| (OffPtr [off] ptr) => (ADD (MOVDconst [off]) ptr) |
| |
| // TODO: optimize these cases? |
| (Ctz64NonZero ...) => (Ctz64 ...) |
| (Ctz32NonZero ...) => (Ctz32 ...) |
| |
| // Ctz(x) = 64 - findLeftmostOne((x-1)&^x) |
| (Ctz64 <t> x) => (SUB (MOVDconst [64]) (FLOGR (AND <t> (SUBconst <t> [1] x) (NOT <t> x)))) |
| (Ctz32 <t> x) => (SUB (MOVDconst [64]) (FLOGR (MOVWZreg (ANDW <t> (SUBWconst <t> [1] x) (NOTW <t> x))))) |
| |
| (BitLen64 x) => (SUB (MOVDconst [64]) (FLOGR x)) |
| |
| // POPCNT treats the input register as a vector of 8 bytes, producing |
| // a population count for each individual byte. For inputs larger than |
| // a single byte we therefore need to sum the individual bytes produced |
| // by the POPCNT instruction. For example, the following instruction |
| // sequence could be used to calculate the population count of a 4-byte |
| // value: |
| // |
| // MOVD $0x12345678, R1 // R1=0x12345678 <-- input |
| // POPCNT R1, R2 // R2=0x02030404 |
| // SRW $16, R2, R3 // R3=0x00000203 |
| // ADDW R2, R3, R4 // R4=0x02030607 |
| // SRW $8, R4, R5 // R5=0x00020306 |
| // ADDW R4, R5, R6 // R6=0x0205090d |
| // MOVBZ R6, R7 // R7=0x0000000d <-- result is 13 |
| // |
| (PopCount8 x) => (POPCNT (MOVBZreg x)) |
| (PopCount16 x) => (MOVBZreg (SumBytes2 (POPCNT <typ.UInt16> x))) |
| (PopCount32 x) => (MOVBZreg (SumBytes4 (POPCNT <typ.UInt32> x))) |
| (PopCount64 x) => (MOVBZreg (SumBytes8 (POPCNT <typ.UInt64> x))) |
| |
| // SumBytes{2,4,8} pseudo operations sum the values of the rightmost |
| // 2, 4 or 8 bytes respectively. The result is a single byte however |
| // other bytes might contain junk so a zero extension is required if |
| // the desired output type is larger than 1 byte. |
| (SumBytes2 x) => (ADDW (SRWconst <typ.UInt8> x [8]) x) |
| (SumBytes4 x) => (SumBytes2 (ADDW <typ.UInt16> (SRWconst <typ.UInt16> x [16]) x)) |
| (SumBytes8 x) => (SumBytes4 (ADDW <typ.UInt32> (SRDconst <typ.UInt32> x [32]) x)) |
| |
| (Bswap64 ...) => (MOVDBR ...) |
| (Bswap32 ...) => (MOVWBR ...) |
| |
| // add with carry |
| (Select0 (Add64carry x y c)) |
| => (Select0 <typ.UInt64> (ADDE x y (Select1 <types.TypeFlags> (ADDCconst c [-1])))) |
| (Select1 (Add64carry x y c)) |
| => (Select0 <typ.UInt64> (ADDE (MOVDconst [0]) (MOVDconst [0]) (Select1 <types.TypeFlags> (ADDE x y (Select1 <types.TypeFlags> (ADDCconst c [-1])))))) |
| |
| // subtract with borrow |
| (Select0 (Sub64borrow x y c)) |
| => (Select0 <typ.UInt64> (SUBE x y (Select1 <types.TypeFlags> (SUBC (MOVDconst [0]) c)))) |
| (Select1 (Sub64borrow x y c)) |
| => (NEG (Select0 <typ.UInt64> (SUBE (MOVDconst [0]) (MOVDconst [0]) (Select1 <types.TypeFlags> (SUBE x y (Select1 <types.TypeFlags> (SUBC (MOVDconst [0]) c))))))) |
| |
| // math package intrinsics |
| (Sqrt ...) => (FSQRT ...) |
| (Floor x) => (FIDBR [7] x) |
| (Ceil x) => (FIDBR [6] x) |
| (Trunc x) => (FIDBR [5] x) |
| (RoundToEven x) => (FIDBR [4] x) |
| (Round x) => (FIDBR [1] x) |
| (FMA x y z) => (FMADD z x y) |
| |
| // Atomic loads and stores. |
| // The SYNC instruction (fast-BCR-serialization) prevents store-load |
| // reordering. Other sequences of memory operations (load-load, |
| // store-store and load-store) are already guaranteed not to be reordered. |
| (AtomicLoad(8|32|Acq32|64|Ptr) ptr mem) => (MOV(BZ|WZ|WZ|D|D)atomicload ptr mem) |
| (AtomicStore(8|32|64|PtrNoWB) ptr val mem) => (SYNC (MOV(B|W|D|D)atomicstore ptr val mem)) |
| |
| // Store-release doesn't require store-load ordering. |
| (AtomicStoreRel32 ptr val mem) => (MOVWatomicstore ptr val mem) |
| |
| // Atomic adds. |
| (AtomicAdd32 ptr val mem) => (AddTupleFirst32 val (LAA ptr val mem)) |
| (AtomicAdd64 ptr val mem) => (AddTupleFirst64 val (LAAG ptr val mem)) |
| (Select0 <t> (AddTupleFirst32 val tuple)) => (ADDW val (Select0 <t> tuple)) |
| (Select1 (AddTupleFirst32 _ tuple)) => (Select1 tuple) |
| (Select0 <t> (AddTupleFirst64 val tuple)) => (ADD val (Select0 <t> tuple)) |
| (Select1 (AddTupleFirst64 _ tuple)) => (Select1 tuple) |
| |
| // Atomic exchanges. |
| (AtomicExchange32 ptr val mem) => (LoweredAtomicExchange32 ptr val mem) |
| (AtomicExchange64 ptr val mem) => (LoweredAtomicExchange64 ptr val mem) |
| |
| // Atomic compare and swap. |
| (AtomicCompareAndSwap32 ptr old new_ mem) => (LoweredAtomicCas32 ptr old new_ mem) |
| (AtomicCompareAndSwap64 ptr old new_ mem) => (LoweredAtomicCas64 ptr old new_ mem) |
| |
| // Atomic and: *(*uint8)(ptr) &= val |
| // |
| // Round pointer down to nearest word boundary and pad value with ones before |
| // applying atomic AND operation to target word. |
| // |
| // *(*uint32)(ptr &^ 3) &= rotateleft(uint32(val) | 0xffffff00, ((3 << 3) ^ ((ptr & 3) << 3)) |
| // |
| (AtomicAnd8 ptr val mem) |
| => (LANfloor |
| ptr |
| (RLL <typ.UInt32> |
| (ORWconst <typ.UInt32> val [-1<<8]) |
| (RXSBG <typ.UInt32> {s390x.NewRotateParams(59, 60, 3)} (MOVDconst [3<<3]) ptr)) |
| mem) |
| |
| // Atomic or: *(*uint8)(ptr) |= val |
| // |
| // Round pointer down to nearest word boundary and pad value with zeros before |
| // applying atomic OR operation to target word. |
| // |
| // *(*uint32)(ptr &^ 3) |= uint32(val) << ((3 << 3) ^ ((ptr & 3) << 3)) |
| // |
| (AtomicOr8 ptr val mem) |
| => (LAOfloor |
| ptr |
| (SLW <typ.UInt32> |
| (MOVBZreg <typ.UInt32> val) |
| (RXSBG <typ.UInt32> {s390x.NewRotateParams(59, 60, 3)} (MOVDconst [3<<3]) ptr)) |
| mem) |
| |
| (AtomicAnd32 ...) => (LAN ...) |
| (AtomicOr32 ...) => (LAO ...) |
| |
| // Lowering extension |
| // Note: we always extend to 64 bits even though some ops don't need that many result bits. |
| (SignExt8to(16|32|64) ...) => (MOVBreg ...) |
| (SignExt16to(32|64) ...) => (MOVHreg ...) |
| (SignExt32to64 ...) => (MOVWreg ...) |
| |
| (ZeroExt8to(16|32|64) ...) => (MOVBZreg ...) |
| (ZeroExt16to(32|64) ...) => (MOVHZreg ...) |
| (ZeroExt32to64 ...) => (MOVWZreg ...) |
| |
| (Slicemask <t> x) => (SRADconst (NEG <t> x) [63]) |
| |
| // Lowering truncation |
| // Because we ignore high parts of registers, truncates are just copies. |
| (Trunc(16|32|64)to8 ...) => (Copy ...) |
| (Trunc(32|64)to16 ...) => (Copy ...) |
| (Trunc64to32 ...) => (Copy ...) |
| |
| // Lowering float <-> int |
| (Cvt32to32F ...) => (CEFBRA ...) |
| (Cvt32to64F ...) => (CDFBRA ...) |
| (Cvt64to32F ...) => (CEGBRA ...) |
| (Cvt64to64F ...) => (CDGBRA ...) |
| |
| (Cvt32Fto32 ...) => (CFEBRA ...) |
| (Cvt32Fto64 ...) => (CGEBRA ...) |
| (Cvt64Fto32 ...) => (CFDBRA ...) |
| (Cvt64Fto64 ...) => (CGDBRA ...) |
| |
| // Lowering float <-> uint |
| (Cvt32Uto32F ...) => (CELFBR ...) |
| (Cvt32Uto64F ...) => (CDLFBR ...) |
| (Cvt64Uto32F ...) => (CELGBR ...) |
| (Cvt64Uto64F ...) => (CDLGBR ...) |
| |
| (Cvt32Fto32U ...) => (CLFEBR ...) |
| (Cvt32Fto64U ...) => (CLGEBR ...) |
| (Cvt64Fto32U ...) => (CLFDBR ...) |
| (Cvt64Fto64U ...) => (CLGDBR ...) |
| |
| // Lowering float32 <-> float64 |
| (Cvt32Fto64F ...) => (LDEBR ...) |
| (Cvt64Fto32F ...) => (LEDBR ...) |
| |
| (CvtBoolToUint8 ...) => (Copy ...) |
| |
| (Round(32|64)F ...) => (LoweredRound(32|64)F ...) |
| |
| // Lowering shifts |
| |
| // Lower bounded shifts first. No need to check shift value. |
| (Lsh64x(64|32|16|8) x y) && shiftIsBounded(v) => (SLD x y) |
| (Lsh32x(64|32|16|8) x y) && shiftIsBounded(v) => (SLW x y) |
| (Lsh16x(64|32|16|8) x y) && shiftIsBounded(v) => (SLW x y) |
| (Lsh8x(64|32|16|8) x y) && shiftIsBounded(v) => (SLW x y) |
| (Rsh64Ux(64|32|16|8) x y) && shiftIsBounded(v) => (SRD x y) |
| (Rsh32Ux(64|32|16|8) x y) && shiftIsBounded(v) => (SRW x y) |
| (Rsh16Ux(64|32|16|8) x y) && shiftIsBounded(v) => (SRW (MOVHZreg x) y) |
| (Rsh8Ux(64|32|16|8) x y) && shiftIsBounded(v) => (SRW (MOVBZreg x) y) |
| (Rsh64x(64|32|16|8) x y) && shiftIsBounded(v) => (SRAD x y) |
| (Rsh32x(64|32|16|8) x y) && shiftIsBounded(v) => (SRAW x y) |
| (Rsh16x(64|32|16|8) x y) && shiftIsBounded(v) => (SRAW (MOVHreg x) y) |
| (Rsh8x(64|32|16|8) x y) && shiftIsBounded(v) => (SRAW (MOVBreg x) y) |
| |
| // Unsigned shifts need to return 0 if shift amount is >= width of shifted value. |
| // result = shift >= 64 ? 0 : arg << shift |
| (Lsh(64|32|16|8)x64 <t> x y) => (LOCGR {s390x.GreaterOrEqual} <t> (SL(D|W|W|W) <t> x y) (MOVDconst [0]) (CMPUconst y [64])) |
| (Lsh(64|32|16|8)x32 <t> x y) => (LOCGR {s390x.GreaterOrEqual} <t> (SL(D|W|W|W) <t> x y) (MOVDconst [0]) (CMPWUconst y [64])) |
| (Lsh(64|32|16|8)x16 <t> x y) => (LOCGR {s390x.GreaterOrEqual} <t> (SL(D|W|W|W) <t> x y) (MOVDconst [0]) (CMPWUconst (MOVHZreg y) [64])) |
| (Lsh(64|32|16|8)x8 <t> x y) => (LOCGR {s390x.GreaterOrEqual} <t> (SL(D|W|W|W) <t> x y) (MOVDconst [0]) (CMPWUconst (MOVBZreg y) [64])) |
| |
| (Rsh(64|32)Ux64 <t> x y) => (LOCGR {s390x.GreaterOrEqual} <t> (SR(D|W) <t> x y) (MOVDconst [0]) (CMPUconst y [64])) |
| (Rsh(64|32)Ux32 <t> x y) => (LOCGR {s390x.GreaterOrEqual} <t> (SR(D|W) <t> x y) (MOVDconst [0]) (CMPWUconst y [64])) |
| (Rsh(64|32)Ux16 <t> x y) => (LOCGR {s390x.GreaterOrEqual} <t> (SR(D|W) <t> x y) (MOVDconst [0]) (CMPWUconst (MOVHZreg y) [64])) |
| (Rsh(64|32)Ux8 <t> x y) => (LOCGR {s390x.GreaterOrEqual} <t> (SR(D|W) <t> x y) (MOVDconst [0]) (CMPWUconst (MOVBZreg y) [64])) |
| |
| (Rsh(16|8)Ux64 <t> x y) => (LOCGR {s390x.GreaterOrEqual} <t> (SRW <t> (MOV(H|B)Zreg x) y) (MOVDconst [0]) (CMPUconst y [64])) |
| (Rsh(16|8)Ux32 <t> x y) => (LOCGR {s390x.GreaterOrEqual} <t> (SRW <t> (MOV(H|B)Zreg x) y) (MOVDconst [0]) (CMPWUconst y [64])) |
| (Rsh(16|8)Ux16 <t> x y) => (LOCGR {s390x.GreaterOrEqual} <t> (SRW <t> (MOV(H|B)Zreg x) y) (MOVDconst [0]) (CMPWUconst (MOVHZreg y) [64])) |
| (Rsh(16|8)Ux8 <t> x y) => (LOCGR {s390x.GreaterOrEqual} <t> (SRW <t> (MOV(H|B)Zreg x) y) (MOVDconst [0]) (CMPWUconst (MOVBZreg y) [64])) |
| |
| // Signed right shift needs to return 0/-1 if shift amount is >= width of shifted value. |
| // We implement this by setting the shift value to 63 (all ones) if the shift value is more than 63. |
| // result = arg >> (shift >= 64 ? 63 : shift) |
| (Rsh(64|32)x64 x y) => (SRA(D|W) x (LOCGR {s390x.GreaterOrEqual} <y.Type> y (MOVDconst <y.Type> [63]) (CMPUconst y [64]))) |
| (Rsh(64|32)x32 x y) => (SRA(D|W) x (LOCGR {s390x.GreaterOrEqual} <y.Type> y (MOVDconst <y.Type> [63]) (CMPWUconst y [64]))) |
| (Rsh(64|32)x16 x y) => (SRA(D|W) x (LOCGR {s390x.GreaterOrEqual} <y.Type> y (MOVDconst <y.Type> [63]) (CMPWUconst (MOVHZreg y) [64]))) |
| (Rsh(64|32)x8 x y) => (SRA(D|W) x (LOCGR {s390x.GreaterOrEqual} <y.Type> y (MOVDconst <y.Type> [63]) (CMPWUconst (MOVBZreg y) [64]))) |
| |
| (Rsh(16|8)x64 x y) => (SRAW (MOV(H|B)reg x) (LOCGR {s390x.GreaterOrEqual} <y.Type> y (MOVDconst <y.Type> [63]) (CMPUconst y [64]))) |
| (Rsh(16|8)x32 x y) => (SRAW (MOV(H|B)reg x) (LOCGR {s390x.GreaterOrEqual} <y.Type> y (MOVDconst <y.Type> [63]) (CMPWUconst y [64]))) |
| (Rsh(16|8)x16 x y) => (SRAW (MOV(H|B)reg x) (LOCGR {s390x.GreaterOrEqual} <y.Type> y (MOVDconst <y.Type> [63]) (CMPWUconst (MOVHZreg y) [64]))) |
| (Rsh(16|8)x8 x y) => (SRAW (MOV(H|B)reg x) (LOCGR {s390x.GreaterOrEqual} <y.Type> y (MOVDconst <y.Type> [63]) (CMPWUconst (MOVBZreg y) [64]))) |
| |
| // Lowering rotates |
| (RotateLeft8 <t> x (MOVDconst [c])) => (Or8 (Lsh8x64 <t> x (MOVDconst [c&7])) (Rsh8Ux64 <t> x (MOVDconst [-c&7]))) |
| (RotateLeft16 <t> x (MOVDconst [c])) => (Or16 (Lsh16x64 <t> x (MOVDconst [c&15])) (Rsh16Ux64 <t> x (MOVDconst [-c&15]))) |
| (RotateLeft32 ...) => (RLL ...) |
| (RotateLeft64 ...) => (RLLG ...) |
| |
| // Lowering comparisons |
| (Less64 x y) => (LOCGR {s390x.Less} (MOVDconst [0]) (MOVDconst [1]) (CMP x y)) |
| (Less32 x y) => (LOCGR {s390x.Less} (MOVDconst [0]) (MOVDconst [1]) (CMPW x y)) |
| (Less(16|8) x y) => (LOCGR {s390x.Less} (MOVDconst [0]) (MOVDconst [1]) (CMPW (MOV(H|B)reg x) (MOV(H|B)reg y))) |
| (Less64U x y) => (LOCGR {s390x.Less} (MOVDconst [0]) (MOVDconst [1]) (CMPU x y)) |
| (Less32U x y) => (LOCGR {s390x.Less} (MOVDconst [0]) (MOVDconst [1]) (CMPWU x y)) |
| (Less(16|8)U x y) => (LOCGR {s390x.Less} (MOVDconst [0]) (MOVDconst [1]) (CMPWU (MOV(H|B)Zreg x) (MOV(H|B)Zreg y))) |
| (Less64F x y) => (LOCGR {s390x.Less} (MOVDconst [0]) (MOVDconst [1]) (FCMP x y)) |
| (Less32F x y) => (LOCGR {s390x.Less} (MOVDconst [0]) (MOVDconst [1]) (FCMPS x y)) |
| |
| (Leq64 x y) => (LOCGR {s390x.LessOrEqual} (MOVDconst [0]) (MOVDconst [1]) (CMP x y)) |
| (Leq32 x y) => (LOCGR {s390x.LessOrEqual} (MOVDconst [0]) (MOVDconst [1]) (CMPW x y)) |
| (Leq(16|8) x y) => (LOCGR {s390x.LessOrEqual} (MOVDconst [0]) (MOVDconst [1]) (CMPW (MOV(H|B)reg x) (MOV(H|B)reg y))) |
| (Leq64U x y) => (LOCGR {s390x.LessOrEqual} (MOVDconst [0]) (MOVDconst [1]) (CMPU x y)) |
| (Leq32U x y) => (LOCGR {s390x.LessOrEqual} (MOVDconst [0]) (MOVDconst [1]) (CMPWU x y)) |
| (Leq(16|8)U x y) => (LOCGR {s390x.LessOrEqual} (MOVDconst [0]) (MOVDconst [1]) (CMPWU (MOV(H|B)Zreg x) (MOV(H|B)Zreg y))) |
| (Leq64F x y) => (LOCGR {s390x.LessOrEqual} (MOVDconst [0]) (MOVDconst [1]) (FCMP x y)) |
| (Leq32F x y) => (LOCGR {s390x.LessOrEqual} (MOVDconst [0]) (MOVDconst [1]) (FCMPS x y)) |
| |
| (Eq(64|Ptr) x y) => (LOCGR {s390x.Equal} (MOVDconst [0]) (MOVDconst [1]) (CMP x y)) |
| (Eq32 x y) => (LOCGR {s390x.Equal} (MOVDconst [0]) (MOVDconst [1]) (CMPW x y)) |
| (Eq(16|8|B) x y) => (LOCGR {s390x.Equal} (MOVDconst [0]) (MOVDconst [1]) (CMPW (MOV(H|B|B)reg x) (MOV(H|B|B)reg y))) |
| (Eq64F x y) => (LOCGR {s390x.Equal} (MOVDconst [0]) (MOVDconst [1]) (FCMP x y)) |
| (Eq32F x y) => (LOCGR {s390x.Equal} (MOVDconst [0]) (MOVDconst [1]) (FCMPS x y)) |
| |
| (Neq(64|Ptr) x y) => (LOCGR {s390x.NotEqual} (MOVDconst [0]) (MOVDconst [1]) (CMP x y)) |
| (Neq32 x y) => (LOCGR {s390x.NotEqual} (MOVDconst [0]) (MOVDconst [1]) (CMPW x y)) |
| (Neq(16|8|B) x y) => (LOCGR {s390x.NotEqual} (MOVDconst [0]) (MOVDconst [1]) (CMPW (MOV(H|B|B)reg x) (MOV(H|B|B)reg y))) |
| (Neq64F x y) => (LOCGR {s390x.NotEqual} (MOVDconst [0]) (MOVDconst [1]) (FCMP x y)) |
| (Neq32F x y) => (LOCGR {s390x.NotEqual} (MOVDconst [0]) (MOVDconst [1]) (FCMPS x y)) |
| |
| // Lowering loads |
| (Load <t> ptr mem) && (is64BitInt(t) || isPtr(t)) => (MOVDload ptr mem) |
| (Load <t> ptr mem) && is32BitInt(t) && isSigned(t) => (MOVWload ptr mem) |
| (Load <t> ptr mem) && is32BitInt(t) && !isSigned(t) => (MOVWZload ptr mem) |
| (Load <t> ptr mem) && is16BitInt(t) && isSigned(t) => (MOVHload ptr mem) |
| (Load <t> ptr mem) && is16BitInt(t) && !isSigned(t) => (MOVHZload ptr mem) |
| (Load <t> ptr mem) && is8BitInt(t) && isSigned(t) => (MOVBload ptr mem) |
| (Load <t> ptr mem) && (t.IsBoolean() || (is8BitInt(t) && !isSigned(t))) => (MOVBZload ptr mem) |
| (Load <t> ptr mem) && is32BitFloat(t) => (FMOVSload ptr mem) |
| (Load <t> ptr mem) && is64BitFloat(t) => (FMOVDload ptr mem) |
| |
| // Lowering stores |
| // These more-specific FP versions of Store pattern should come first. |
| (Store {t} ptr val mem) && t.Size() == 8 && is64BitFloat(val.Type) => (FMOVDstore ptr val mem) |
| (Store {t} ptr val mem) && t.Size() == 4 && is32BitFloat(val.Type) => (FMOVSstore ptr val mem) |
| |
| (Store {t} ptr val mem) && t.Size() == 8 => (MOVDstore ptr val mem) |
| (Store {t} ptr val mem) && t.Size() == 4 => (MOVWstore ptr val mem) |
| (Store {t} ptr val mem) && t.Size() == 2 => (MOVHstore ptr val mem) |
| (Store {t} ptr val mem) && t.Size() == 1 => (MOVBstore ptr val mem) |
| |
| // Lowering moves |
| |
| // Load and store for small copies. |
| (Move [0] _ _ mem) => mem |
| (Move [1] dst src mem) => (MOVBstore dst (MOVBZload src mem) mem) |
| (Move [2] dst src mem) => (MOVHstore dst (MOVHZload src mem) mem) |
| (Move [4] dst src mem) => (MOVWstore dst (MOVWZload src mem) mem) |
| (Move [8] dst src mem) => (MOVDstore dst (MOVDload src mem) mem) |
| (Move [16] dst src mem) => |
| (MOVDstore [8] dst (MOVDload [8] src mem) |
| (MOVDstore dst (MOVDload src mem) mem)) |
| (Move [24] dst src mem) => |
| (MOVDstore [16] dst (MOVDload [16] src mem) |
| (MOVDstore [8] dst (MOVDload [8] src mem) |
| (MOVDstore dst (MOVDload src mem) mem))) |
| (Move [3] dst src mem) => |
| (MOVBstore [2] dst (MOVBZload [2] src mem) |
| (MOVHstore dst (MOVHZload src mem) mem)) |
| (Move [5] dst src mem) => |
| (MOVBstore [4] dst (MOVBZload [4] src mem) |
| (MOVWstore dst (MOVWZload src mem) mem)) |
| (Move [6] dst src mem) => |
| (MOVHstore [4] dst (MOVHZload [4] src mem) |
| (MOVWstore dst (MOVWZload src mem) mem)) |
| (Move [7] dst src mem) => |
| (MOVBstore [6] dst (MOVBZload [6] src mem) |
| (MOVHstore [4] dst (MOVHZload [4] src mem) |
| (MOVWstore dst (MOVWZload src mem) mem))) |
| |
| // MVC for other moves. Use up to 4 instructions (sizes up to 1024 bytes). |
| (Move [s] dst src mem) && s > 0 && s <= 256 && logLargeCopy(v, s) => |
| (MVC [makeValAndOff32(int32(s), 0)] dst src mem) |
| (Move [s] dst src mem) && s > 256 && s <= 512 && logLargeCopy(v, s) => |
| (MVC [makeValAndOff32(int32(s)-256, 256)] dst src (MVC [makeValAndOff32(256, 0)] dst src mem)) |
| (Move [s] dst src mem) && s > 512 && s <= 768 && logLargeCopy(v, s) => |
| (MVC [makeValAndOff32(int32(s)-512, 512)] dst src (MVC [makeValAndOff32(256, 256)] dst src (MVC [makeValAndOff32(256, 0)] dst src mem))) |
| (Move [s] dst src mem) && s > 768 && s <= 1024 && logLargeCopy(v, s) => |
| (MVC [makeValAndOff32(int32(s)-768, 768)] dst src (MVC [makeValAndOff32(256, 512)] dst src (MVC [makeValAndOff32(256, 256)] dst src (MVC [makeValAndOff32(256, 0)] dst src mem)))) |
| |
| // Move more than 1024 bytes using a loop. |
| (Move [s] dst src mem) && s > 1024 && logLargeCopy(v, s) => |
| (LoweredMove [s%256] dst src (ADD <src.Type> src (MOVDconst [(s/256)*256])) mem) |
| |
| // Lowering Zero instructions |
| (Zero [0] _ mem) => mem |
| (Zero [1] destptr mem) => (MOVBstoreconst [0] destptr mem) |
| (Zero [2] destptr mem) => (MOVHstoreconst [0] destptr mem) |
| (Zero [4] destptr mem) => (MOVWstoreconst [0] destptr mem) |
| (Zero [8] destptr mem) => (MOVDstoreconst [0] destptr mem) |
| (Zero [3] destptr mem) => |
| (MOVBstoreconst [makeValAndOff32(0,2)] destptr |
| (MOVHstoreconst [0] destptr mem)) |
| (Zero [5] destptr mem) => |
| (MOVBstoreconst [makeValAndOff32(0,4)] destptr |
| (MOVWstoreconst [0] destptr mem)) |
| (Zero [6] destptr mem) => |
| (MOVHstoreconst [makeValAndOff32(0,4)] destptr |
| (MOVWstoreconst [0] destptr mem)) |
| (Zero [7] destptr mem) => |
| (MOVWstoreconst [makeValAndOff32(0,3)] destptr |
| (MOVWstoreconst [0] destptr mem)) |
| |
| (Zero [s] destptr mem) && s > 0 && s <= 1024 => |
| (CLEAR [makeValAndOff32(int32(s), 0)] destptr mem) |
| |
| // Zero more than 1024 bytes using a loop. |
| (Zero [s] destptr mem) && s > 1024 => |
| (LoweredZero [s%256] destptr (ADDconst <destptr.Type> destptr [(int32(s)/256)*256]) mem) |
| |
| // Lowering constants |
| (Const(64|32|16|8) [val]) => (MOVDconst [int64(val)]) |
| (Const(32|64)F ...) => (FMOV(S|D)const ...) |
| (ConstNil) => (MOVDconst [0]) |
| (ConstBool [b]) => (MOVDconst [b2i(b)]) |
| |
| // Lowering calls |
| (StaticCall ...) => (CALLstatic ...) |
| (ClosureCall ...) => (CALLclosure ...) |
| (InterCall ...) => (CALLinter ...) |
| |
| // Miscellaneous |
| (IsNonNil p) => (LOCGR {s390x.NotEqual} (MOVDconst [0]) (MOVDconst [1]) (CMPconst p [0])) |
| (IsInBounds idx len) => (LOCGR {s390x.Less} (MOVDconst [0]) (MOVDconst [1]) (CMPU idx len)) |
| (IsSliceInBounds idx len) => (LOCGR {s390x.LessOrEqual} (MOVDconst [0]) (MOVDconst [1]) (CMPU idx len)) |
| (NilCheck ...) => (LoweredNilCheck ...) |
| (GetG ...) => (LoweredGetG ...) |
| (GetClosurePtr ...) => (LoweredGetClosurePtr ...) |
| (GetCallerSP ...) => (LoweredGetCallerSP ...) |
| (GetCallerPC ...) => (LoweredGetCallerPC ...) |
| (Addr {sym} base) => (MOVDaddr {sym} base) |
| (LocalAddr {sym} base _) => (MOVDaddr {sym} base) |
| (ITab (Load ptr mem)) => (MOVDload ptr mem) |
| |
| // block rewrites |
| (If cond yes no) => (CLIJ {s390x.LessOrGreater} (MOVBZreg <typ.Bool> cond) [0] yes no) |
| |
| // Write barrier. |
| (WB ...) => (LoweredWB ...) |
| |
| (PanicBounds [kind] x y mem) && boundsABI(kind) == 0 => (LoweredPanicBoundsA [kind] x y mem) |
| (PanicBounds [kind] x y mem) && boundsABI(kind) == 1 => (LoweredPanicBoundsB [kind] x y mem) |
| (PanicBounds [kind] x y mem) && boundsABI(kind) == 2 => (LoweredPanicBoundsC [kind] x y mem) |
| |
| // *************************** |
| // Above: lowering rules |
| // Below: optimizations |
| // *************************** |
| // TODO: Should the optimizations be a separate pass? |
| |
| // Note: when removing unnecessary sign/zero extensions. |
| // |
| // After a value is spilled it is restored using a sign- or zero-extension |
| // to register-width as appropriate for its type. For example, a uint8 will |
| // be restored using a MOVBZ (llgc) instruction which will zero extend the |
| // 8-bit value to 64-bits. |
| // |
| // This is a hazard when folding sign- and zero-extensions since we need to |
| // ensure not only that the value in the argument register is correctly |
| // extended but also that it will still be correctly extended if it is |
| // spilled and restored. |
| // |
| // In general this means we need type checks when the RHS of a rule is an |
| // OpCopy (i.e. "(... x:(...) ...) -> x"). |
| |
| // Merge double extensions. |
| (MOV(H|HZ)reg e:(MOV(B|BZ)reg x)) && clobberIfDead(e) => (MOV(B|BZ)reg x) |
| (MOV(W|WZ)reg e:(MOV(B|BZ)reg x)) && clobberIfDead(e) => (MOV(B|BZ)reg x) |
| (MOV(W|WZ)reg e:(MOV(H|HZ)reg x)) && clobberIfDead(e) => (MOV(H|HZ)reg x) |
| |
| // Bypass redundant sign extensions. |
| (MOV(B|BZ)reg e:(MOVBreg x)) && clobberIfDead(e) => (MOV(B|BZ)reg x) |
| (MOV(B|BZ)reg e:(MOVHreg x)) && clobberIfDead(e) => (MOV(B|BZ)reg x) |
| (MOV(B|BZ)reg e:(MOVWreg x)) && clobberIfDead(e) => (MOV(B|BZ)reg x) |
| (MOV(H|HZ)reg e:(MOVHreg x)) && clobberIfDead(e) => (MOV(H|HZ)reg x) |
| (MOV(H|HZ)reg e:(MOVWreg x)) && clobberIfDead(e) => (MOV(H|HZ)reg x) |
| (MOV(W|WZ)reg e:(MOVWreg x)) && clobberIfDead(e) => (MOV(W|WZ)reg x) |
| |
| // Bypass redundant zero extensions. |
| (MOV(B|BZ)reg e:(MOVBZreg x)) && clobberIfDead(e) => (MOV(B|BZ)reg x) |
| (MOV(B|BZ)reg e:(MOVHZreg x)) && clobberIfDead(e) => (MOV(B|BZ)reg x) |
| (MOV(B|BZ)reg e:(MOVWZreg x)) && clobberIfDead(e) => (MOV(B|BZ)reg x) |
| (MOV(H|HZ)reg e:(MOVHZreg x)) && clobberIfDead(e) => (MOV(H|HZ)reg x) |
| (MOV(H|HZ)reg e:(MOVWZreg x)) && clobberIfDead(e) => (MOV(H|HZ)reg x) |
| (MOV(W|WZ)reg e:(MOVWZreg x)) && clobberIfDead(e) => (MOV(W|WZ)reg x) |
| |
| // Remove zero extensions after zero extending load. |
| // Note: take care that if x is spilled it is restored correctly. |
| (MOV(B|H|W)Zreg x:(MOVBZload _ _)) && (!x.Type.IsSigned() || x.Type.Size() > 1) => x |
| (MOV(H|W)Zreg x:(MOVHZload _ _)) && (!x.Type.IsSigned() || x.Type.Size() > 2) => x |
| (MOVWZreg x:(MOVWZload _ _)) && (!x.Type.IsSigned() || x.Type.Size() > 4) => x |
| |
| // Remove sign extensions after sign extending load. |
| // Note: take care that if x is spilled it is restored correctly. |
| (MOV(B|H|W)reg x:(MOVBload _ _)) && (x.Type.IsSigned() || x.Type.Size() == 8) => x |
| (MOV(H|W)reg x:(MOVHload _ _)) && (x.Type.IsSigned() || x.Type.Size() == 8) => x |
| (MOVWreg x:(MOVWload _ _)) && (x.Type.IsSigned() || x.Type.Size() == 8) => x |
| |
| // Remove sign extensions after zero extending load. |
| // These type checks are probably unnecessary but do them anyway just in case. |
| (MOV(H|W)reg x:(MOVBZload _ _)) && (!x.Type.IsSigned() || x.Type.Size() > 1) => x |
| (MOVWreg x:(MOVHZload _ _)) && (!x.Type.IsSigned() || x.Type.Size() > 2) => x |
| |
| // Fold sign and zero extensions into loads. |
| // |
| // Note: The combined instruction must end up in the same block |
| // as the original load. If not, we end up making a value with |
| // memory type live in two different blocks, which can lead to |
| // multiple memory values alive simultaneously. |
| // |
| // Make sure we don't combine these ops if the load has another use. |
| // This prevents a single load from being split into multiple loads |
| // which then might return different values. See test/atomicload.go. |
| (MOV(B|H|W)Zreg <t> x:(MOV(B|H|W)load [o] {s} p mem)) |
| && x.Uses == 1 |
| && clobber(x) |
| => @x.Block (MOV(B|H|W)Zload <t> [o] {s} p mem) |
| (MOV(B|H|W)reg <t> x:(MOV(B|H|W)Zload [o] {s} p mem)) |
| && x.Uses == 1 |
| && clobber(x) |
| => @x.Block (MOV(B|H|W)load <t> [o] {s} p mem) |
| |
| // Remove zero extensions after argument load. |
| (MOVBZreg x:(Arg <t>)) && !t.IsSigned() && t.Size() == 1 => x |
| (MOVHZreg x:(Arg <t>)) && !t.IsSigned() && t.Size() <= 2 => x |
| (MOVWZreg x:(Arg <t>)) && !t.IsSigned() && t.Size() <= 4 => x |
| |
| // Remove sign extensions after argument load. |
| (MOVBreg x:(Arg <t>)) && t.IsSigned() && t.Size() == 1 => x |
| (MOVHreg x:(Arg <t>)) && t.IsSigned() && t.Size() <= 2 => x |
| (MOVWreg x:(Arg <t>)) && t.IsSigned() && t.Size() <= 4 => x |
| |
| // Fold zero extensions into constants. |
| (MOVBZreg (MOVDconst [c])) => (MOVDconst [int64( uint8(c))]) |
| (MOVHZreg (MOVDconst [c])) => (MOVDconst [int64(uint16(c))]) |
| (MOVWZreg (MOVDconst [c])) => (MOVDconst [int64(uint32(c))]) |
| |
| // Fold sign extensions into constants. |
| (MOVBreg (MOVDconst [c])) => (MOVDconst [int64( int8(c))]) |
| (MOVHreg (MOVDconst [c])) => (MOVDconst [int64(int16(c))]) |
| (MOVWreg (MOVDconst [c])) => (MOVDconst [int64(int32(c))]) |
| |
| // Remove zero extension of conditional move. |
| // Note: only for MOVBZreg for now since it is added as part of 'if' statement lowering. |
| (MOVBZreg x:(LOCGR (MOVDconst [c]) (MOVDconst [d]) _)) |
| && int64(uint8(c)) == c |
| && int64(uint8(d)) == d |
| && (!x.Type.IsSigned() || x.Type.Size() > 1) |
| => x |
| |
| // Fold boolean tests into blocks. |
| // Note: this must match If statement lowering. |
| (CLIJ {s390x.LessOrGreater} (LOCGR {d} (MOVDconst [0]) (MOVDconst [x]) cmp) [0] yes no) |
| && int32(x) != 0 |
| => (BRC {d} cmp yes no) |
| |
| // Canonicalize BRC condition code mask by removing impossible conditions. |
| // Integer comparisons cannot generate the unordered condition. |
| (BRC {c} x:((CMP|CMPW|CMPU|CMPWU) _ _) yes no) && c&s390x.Unordered != 0 => (BRC {c&^s390x.Unordered} x yes no) |
| (BRC {c} x:((CMP|CMPW|CMPU|CMPWU)const _) yes no) && c&s390x.Unordered != 0 => (BRC {c&^s390x.Unordered} x yes no) |
| |
| // Compare-and-branch. |
| // Note: bit 3 (unordered) must not be set so we mask out s390x.Unordered. |
| (BRC {c} (CMP x y) yes no) => (CGRJ {c&^s390x.Unordered} x y yes no) |
| (BRC {c} (CMPW x y) yes no) => (CRJ {c&^s390x.Unordered} x y yes no) |
| (BRC {c} (CMPU x y) yes no) => (CLGRJ {c&^s390x.Unordered} x y yes no) |
| (BRC {c} (CMPWU x y) yes no) => (CLRJ {c&^s390x.Unordered} x y yes no) |
| |
| // Compare-and-branch (immediate). |
| // Note: bit 3 (unordered) must not be set so we mask out s390x.Unordered. |
| (BRC {c} (CMPconst x [y]) yes no) && y == int32( int8(y)) => (CGIJ {c&^s390x.Unordered} x [ int8(y)] yes no) |
| (BRC {c} (CMPWconst x [y]) yes no) && y == int32( int8(y)) => (CIJ {c&^s390x.Unordered} x [ int8(y)] yes no) |
| (BRC {c} (CMPUconst x [y]) yes no) && y == int32(uint8(y)) => (CLGIJ {c&^s390x.Unordered} x [uint8(y)] yes no) |
| (BRC {c} (CMPWUconst x [y]) yes no) && y == int32(uint8(y)) => (CLIJ {c&^s390x.Unordered} x [uint8(y)] yes no) |
| |
| // Absorb immediate into compare-and-branch. |
| (C(R|GR)J {c} x (MOVDconst [y]) yes no) && is8Bit(y) => (C(I|GI)J {c} x [ int8(y)] yes no) |
| (CL(R|GR)J {c} x (MOVDconst [y]) yes no) && isU8Bit(y) => (CL(I|GI)J {c} x [uint8(y)] yes no) |
| (C(R|GR)J {c} (MOVDconst [x]) y yes no) && is8Bit(x) => (C(I|GI)J {c.ReverseComparison()} y [ int8(x)] yes no) |
| (CL(R|GR)J {c} (MOVDconst [x]) y yes no) && isU8Bit(x) => (CL(I|GI)J {c.ReverseComparison()} y [uint8(x)] yes no) |
| |
| // Prefer comparison with immediate to compare-and-branch. |
| (CGRJ {c} x (MOVDconst [y]) yes no) && !is8Bit(y) && is32Bit(y) => (BRC {c} (CMPconst x [int32(y)]) yes no) |
| (CRJ {c} x (MOVDconst [y]) yes no) && !is8Bit(y) && is32Bit(y) => (BRC {c} (CMPWconst x [int32(y)]) yes no) |
| (CLGRJ {c} x (MOVDconst [y]) yes no) && !isU8Bit(y) && isU32Bit(y) => (BRC {c} (CMPUconst x [int32(y)]) yes no) |
| (CLRJ {c} x (MOVDconst [y]) yes no) && !isU8Bit(y) && isU32Bit(y) => (BRC {c} (CMPWUconst x [int32(y)]) yes no) |
| (CGRJ {c} (MOVDconst [x]) y yes no) && !is8Bit(x) && is32Bit(x) => (BRC {c.ReverseComparison()} (CMPconst y [int32(x)]) yes no) |
| (CRJ {c} (MOVDconst [x]) y yes no) && !is8Bit(x) && is32Bit(x) => (BRC {c.ReverseComparison()} (CMPWconst y [int32(x)]) yes no) |
| (CLGRJ {c} (MOVDconst [x]) y yes no) && !isU8Bit(x) && isU32Bit(x) => (BRC {c.ReverseComparison()} (CMPUconst y [int32(x)]) yes no) |
| (CLRJ {c} (MOVDconst [x]) y yes no) && !isU8Bit(x) && isU32Bit(x) => (BRC {c.ReverseComparison()} (CMPWUconst y [int32(x)]) yes no) |
| |
| // Absorb sign/zero extensions into 32-bit compare-and-branch. |
| (CIJ {c} (MOV(W|WZ)reg x) [y] yes no) => (CIJ {c} x [y] yes no) |
| (CLIJ {c} (MOV(W|WZ)reg x) [y] yes no) => (CLIJ {c} x [y] yes no) |
| |
| // Bring out-of-range signed immediates into range by varying branch condition. |
| (BRC {s390x.Less} (CMPconst x [ 128]) yes no) => (CGIJ {s390x.LessOrEqual} x [ 127] yes no) |
| (BRC {s390x.Less} (CMPWconst x [ 128]) yes no) => (CIJ {s390x.LessOrEqual} x [ 127] yes no) |
| (BRC {s390x.LessOrEqual} (CMPconst x [-129]) yes no) => (CGIJ {s390x.Less} x [-128] yes no) |
| (BRC {s390x.LessOrEqual} (CMPWconst x [-129]) yes no) => (CIJ {s390x.Less} x [-128] yes no) |
| (BRC {s390x.Greater} (CMPconst x [-129]) yes no) => (CGIJ {s390x.GreaterOrEqual} x [-128] yes no) |
| (BRC {s390x.Greater} (CMPWconst x [-129]) yes no) => (CIJ {s390x.GreaterOrEqual} x [-128] yes no) |
| (BRC {s390x.GreaterOrEqual} (CMPconst x [ 128]) yes no) => (CGIJ {s390x.Greater} x [ 127] yes no) |
| (BRC {s390x.GreaterOrEqual} (CMPWconst x [ 128]) yes no) => (CIJ {s390x.Greater} x [ 127] yes no) |
| |
| // Bring out-of-range unsigned immediates into range by varying branch condition. |
| (BRC {s390x.Less} (CMP(WU|U)const x [256]) yes no) => (C(L|LG)IJ {s390x.LessOrEqual} x [255] yes no) |
| (BRC {s390x.GreaterOrEqual} (CMP(WU|U)const x [256]) yes no) => (C(L|LG)IJ {s390x.Greater} x [255] yes no) |
| |
| // Bring out-of-range immediates into range by switching signedness (only == and !=). |
| (BRC {c} (CMPconst x [y]) yes no) && y == int32(uint8(y)) && (c == s390x.Equal || c == s390x.LessOrGreater) => (CLGIJ {c} x [uint8(y)] yes no) |
| (BRC {c} (CMPWconst x [y]) yes no) && y == int32(uint8(y)) && (c == s390x.Equal || c == s390x.LessOrGreater) => (CLIJ {c} x [uint8(y)] yes no) |
| (BRC {c} (CMPUconst x [y]) yes no) && y == int32( int8(y)) && (c == s390x.Equal || c == s390x.LessOrGreater) => (CGIJ {c} x [ int8(y)] yes no) |
| (BRC {c} (CMPWUconst x [y]) yes no) && y == int32( int8(y)) && (c == s390x.Equal || c == s390x.LessOrGreater) => (CIJ {c} x [ int8(y)] yes no) |
| |
| // Fold constants into instructions. |
| (ADD x (MOVDconst [c])) && is32Bit(c) => (ADDconst [int32(c)] x) |
| (ADDW x (MOVDconst [c])) => (ADDWconst [int32(c)] x) |
| |
| (SUB x (MOVDconst [c])) && is32Bit(c) => (SUBconst x [int32(c)]) |
| (SUB (MOVDconst [c]) x) && is32Bit(c) => (NEG (SUBconst <v.Type> x [int32(c)])) |
| (SUBW x (MOVDconst [c])) => (SUBWconst x [int32(c)]) |
| (SUBW (MOVDconst [c]) x) => (NEGW (SUBWconst <v.Type> x [int32(c)])) |
| |
| (MULLD x (MOVDconst [c])) && is32Bit(c) => (MULLDconst [int32(c)] x) |
| (MULLW x (MOVDconst [c])) => (MULLWconst [int32(c)] x) |
| |
| // NILF instructions leave the high 32 bits unchanged which is |
| // equivalent to the leftmost 32 bits being set. |
| // TODO(mundaym): modify the assembler to accept 64-bit values |
| // and use isU32Bit(^c). |
| (AND x (MOVDconst [c])) |
| && s390x.NewRotateParams(0, 63, 0).OutMerge(uint64(c)) != nil |
| => (RISBGZ x {*s390x.NewRotateParams(0, 63, 0).OutMerge(uint64(c))}) |
| (AND x (MOVDconst [c])) |
| && is32Bit(c) |
| && c < 0 |
| => (ANDconst [c] x) |
| (AND x (MOVDconst [c])) |
| && is32Bit(c) |
| && c >= 0 |
| => (MOVWZreg (ANDWconst <typ.UInt32> [int32(c)] x)) |
| |
| (ANDW x (MOVDconst [c])) => (ANDWconst [int32(c)] x) |
| |
| ((AND|ANDW)const [c] ((AND|ANDW)const [d] x)) => ((AND|ANDW)const [c&d] x) |
| |
| ((OR|XOR) x (MOVDconst [c])) && isU32Bit(c) => ((OR|XOR)const [c] x) |
| ((OR|XOR)W x (MOVDconst [c])) => ((OR|XOR)Wconst [int32(c)] x) |
| |
| // Constant shifts. |
| (S(LD|RD|RAD) x (MOVDconst [c])) => (S(LD|RD|RAD)const x [uint8(c&63)]) |
| (S(LW|RW|RAW) x (MOVDconst [c])) && c&32 == 0 => (S(LW|RW|RAW)const x [uint8(c&31)]) |
| (S(LW|RW) _ (MOVDconst [c])) && c&32 != 0 => (MOVDconst [0]) |
| (SRAW x (MOVDconst [c])) && c&32 != 0 => (SRAWconst x [31]) |
| |
| // Shifts only use the rightmost 6 bits of the shift value. |
| (S(LD|RD|RAD|LW|RW|RAW) x (RISBGZ y {r})) |
| && r.Amount == 0 |
| && r.OutMask()&63 == 63 |
| => (S(LD|RD|RAD|LW|RW|RAW) x y) |
| (S(LD|RD|RAD|LW|RW|RAW) x (AND (MOVDconst [c]) y)) |
| => (S(LD|RD|RAD|LW|RW|RAW) x (ANDWconst <typ.UInt32> [int32(c&63)] y)) |
| (S(LD|RD|RAD|LW|RW|RAW) x (ANDWconst [c] y)) && c&63 == 63 |
| => (S(LD|RD|RAD|LW|RW|RAW) x y) |
| (SLD x (MOV(W|H|B|WZ|HZ|BZ)reg y)) => (SLD x y) |
| (SRD x (MOV(W|H|B|WZ|HZ|BZ)reg y)) => (SRD x y) |
| (SRAD x (MOV(W|H|B|WZ|HZ|BZ)reg y)) => (SRAD x y) |
| (SLW x (MOV(W|H|B|WZ|HZ|BZ)reg y)) => (SLW x y) |
| (SRW x (MOV(W|H|B|WZ|HZ|BZ)reg y)) => (SRW x y) |
| (SRAW x (MOV(W|H|B|WZ|HZ|BZ)reg y)) => (SRAW x y) |
| |
| // Match rotate by constant. |
| (RLLG x (MOVDconst [c])) => (RISBGZ x {s390x.NewRotateParams(0, 63, uint8(c&63))}) |
| (RLL x (MOVDconst [c])) => (RLLconst x [uint8(c&31)]) |
| |
| // Match rotate by constant pattern. |
| ((ADD|OR|XOR) (SLDconst x [c]) (SRDconst x [64-c])) => (RISBGZ x {s390x.NewRotateParams(0, 63, c)}) |
| ((ADD|OR|XOR)W (SLWconst x [c]) (SRWconst x [32-c])) => (RLLconst x [c]) |
| |
| // Signed 64-bit comparison with immediate. |
| (CMP x (MOVDconst [c])) && is32Bit(c) => (CMPconst x [int32(c)]) |
| (CMP (MOVDconst [c]) x) && is32Bit(c) => (InvertFlags (CMPconst x [int32(c)])) |
| |
| // Unsigned 64-bit comparison with immediate. |
| (CMPU x (MOVDconst [c])) && isU32Bit(c) => (CMPUconst x [int32(c)]) |
| (CMPU (MOVDconst [c]) x) && isU32Bit(c) => (InvertFlags (CMPUconst x [int32(c)])) |
| |
| // Signed and unsigned 32-bit comparison with immediate. |
| (CMP(W|WU) x (MOVDconst [c])) => (CMP(W|WU)const x [int32(c)]) |
| (CMP(W|WU) (MOVDconst [c]) x) => (InvertFlags (CMP(W|WU)const x [int32(c)])) |
| |
| // Match (x >> c) << d to 'rotate then insert selected bits [into zero]'. |
| (SLDconst (SRDconst x [c]) [d]) => (RISBGZ x {s390x.NewRotateParams(uint8(max8(0, int8(c-d))), 63-d, uint8(int8(d-c)&63))}) |
| |
| // Match (x << c) >> d to 'rotate then insert selected bits [into zero]'. |
| (SRDconst (SLDconst x [c]) [d]) => (RISBGZ x {s390x.NewRotateParams(d, uint8(min8(63, int8(63-c+d))), uint8(int8(c-d)&63))}) |
| |
| // Absorb input zero extension into 'rotate then insert selected bits [into zero]'. |
| (RISBGZ (MOVWZreg x) {r}) && r.InMerge(0xffffffff) != nil => (RISBGZ x {*r.InMerge(0xffffffff)}) |
| (RISBGZ (MOVHZreg x) {r}) && r.InMerge(0x0000ffff) != nil => (RISBGZ x {*r.InMerge(0x0000ffff)}) |
| (RISBGZ (MOVBZreg x) {r}) && r.InMerge(0x000000ff) != nil => (RISBGZ x {*r.InMerge(0x000000ff)}) |
| |
| // Absorb 'rotate then insert selected bits [into zero]' into zero extension. |
| (MOVWZreg (RISBGZ x {r})) && r.OutMerge(0xffffffff) != nil => (RISBGZ x {*r.OutMerge(0xffffffff)}) |
| (MOVHZreg (RISBGZ x {r})) && r.OutMerge(0x0000ffff) != nil => (RISBGZ x {*r.OutMerge(0x0000ffff)}) |
| (MOVBZreg (RISBGZ x {r})) && r.OutMerge(0x000000ff) != nil => (RISBGZ x {*r.OutMerge(0x000000ff)}) |
| |
| // Absorb shift into 'rotate then insert selected bits [into zero]'. |
| // |
| // Any unsigned shift can be represented as a rotate and mask operation: |
| // |
| // x << c => RotateLeft64(x, c) & (^uint64(0) << c) |
| // x >> c => RotateLeft64(x, -c) & (^uint64(0) >> c) |
| // |
| // Therefore when a shift is used as the input to a rotate then insert |
| // selected bits instruction we can merge the two together. We just have |
| // to be careful that the resultant mask is representable (non-zero and |
| // contiguous). For example, assuming that x is variable and c, y and m |
| // are constants, a shift followed by a rotate then insert selected bits |
| // could be represented as: |
| // |
| // RotateLeft64(RotateLeft64(x, c) & (^uint64(0) << c), y) & m |
| // |
| // We can split the rotation by y into two, one rotate for x and one for |
| // the mask: |
| // |
| // RotateLeft64(RotateLeft64(x, c), y) & (RotateLeft64(^uint64(0) << c, y)) & m |
| // |
| // The rotations of x by c followed by y can then be combined: |
| // |
| // RotateLeft64(x, c+y) & (RotateLeft64(^uint64(0) << c, y)) & m |
| // ^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| // rotate mask |
| // |
| // To perform this optimization we therefore just need to check that it |
| // is valid to merge the shift mask (^(uint64(0)<<c)) into the selected |
| // bits mask (i.e. that the resultant mask is non-zero and contiguous). |
| // |
| (RISBGZ (SLDconst x [c]) {r}) && r.InMerge(^uint64(0)<<c) != nil => (RISBGZ x {(*r.InMerge(^uint64(0)<<c)).RotateLeft(c)}) |
| (RISBGZ (SRDconst x [c]) {r}) && r.InMerge(^uint64(0)>>c) != nil => (RISBGZ x {(*r.InMerge(^uint64(0)>>c)).RotateLeft(-c)}) |
| |
| // Absorb 'rotate then insert selected bits [into zero]' into left shift. |
| (SLDconst (RISBGZ x {r}) [c]) |
| && s390x.NewRotateParams(0, 63-c, c).InMerge(r.OutMask()) != nil |
| => (RISBGZ x {(*s390x.NewRotateParams(0, 63-c, c).InMerge(r.OutMask())).RotateLeft(r.Amount)}) |
| |
| // Absorb 'rotate then insert selected bits [into zero]' into right shift. |
| (SRDconst (RISBGZ x {r}) [c]) |
| && s390x.NewRotateParams(c, 63, -c&63).InMerge(r.OutMask()) != nil |
| => (RISBGZ x {(*s390x.NewRotateParams(c, 63, -c&63).InMerge(r.OutMask())).RotateLeft(r.Amount)}) |
| |
| // Merge 'rotate then insert selected bits [into zero]' instructions together. |
| (RISBGZ (RISBGZ x {y}) {z}) |
| && z.InMerge(y.OutMask()) != nil |
| => (RISBGZ x {(*z.InMerge(y.OutMask())).RotateLeft(y.Amount)}) |
| |
| // Convert RISBGZ into 64-bit shift (helps CSE). |
| (RISBGZ x {r}) && r.End == 63 && r.Start == -r.Amount&63 => (SRDconst x [-r.Amount&63]) |
| (RISBGZ x {r}) && r.Start == 0 && r.End == 63-r.Amount => (SLDconst x [r.Amount]) |
| |
| // Optimize single bit isolation when it is known to be equivalent to |
| // the most significant bit due to mask produced by arithmetic shift. |
| // Simply isolate the most significant bit itself and place it in the |
| // correct position. |
| // |
| // Example: (int64(x) >> 63) & 0x8 -> RISBGZ $60, $60, $4, Rsrc, Rdst |
| (RISBGZ (SRADconst x [c]) {r}) |
| && r.Start == r.End // single bit selected |
| && (r.Start+r.Amount)&63 <= c // equivalent to most significant bit of x |
| => (RISBGZ x {s390x.NewRotateParams(r.Start, r.Start, -r.Start&63)}) |
| |
| // Canonicalize the order of arguments to comparisons - helps with CSE. |
| ((CMP|CMPW|CMPU|CMPWU) x y) && x.ID > y.ID => (InvertFlags ((CMP|CMPW|CMPU|CMPWU) y x)) |
| |
| // Use sign/zero extend instead of RISBGZ. |
| (RISBGZ x {r}) && r == s390x.NewRotateParams(56, 63, 0) => (MOVBZreg x) |
| (RISBGZ x {r}) && r == s390x.NewRotateParams(48, 63, 0) => (MOVHZreg x) |
| (RISBGZ x {r}) && r == s390x.NewRotateParams(32, 63, 0) => (MOVWZreg x) |
| |
| // Use sign/zero extend instead of ANDW. |
| (ANDWconst [0x00ff] x) => (MOVBZreg x) |
| (ANDWconst [0xffff] x) => (MOVHZreg x) |
| |
| // Strength reduce multiplication to the sum (or difference) of two powers of two. |
| // |
| // Examples: |
| // 5x -> 4x + 1x |
| // 10x -> 8x + 2x |
| // 120x -> 128x - 8x |
| // -120x -> 8x - 128x |
| // |
| // We know that the rightmost bit of any positive value, once isolated, must either |
| // be a power of 2 (because it is a single bit) or 0 (if the original value is 0). |
| // In all of these rules we use a rightmost bit calculation to determine one operand |
| // for the addition or subtraction. We then just need to calculate if the other |
| // operand is a valid power of 2 before we can match the rule. |
| // |
| // Notes: |
| // - the generic rules have already matched single powers of two so we ignore them here |
| // - isPowerOfTwo32 asserts that its argument is greater than 0 |
| // - c&(c-1) = clear rightmost bit |
| // - c&^(c-1) = isolate rightmost bit |
| |
| // c = 2ˣ + 2ʸ => c - 2ˣ = 2ʸ |
| (MULL(D|W)const <t> x [c]) && isPowerOfTwo32(c&(c-1)) |
| => ((ADD|ADDW) (SL(D|W)const <t> x [uint8(log32(c&(c-1)))]) |
| (SL(D|W)const <t> x [uint8(log32(c&^(c-1)))])) |
| |
| // c = 2ʸ - 2ˣ => c + 2ˣ = 2ʸ |
| (MULL(D|W)const <t> x [c]) && isPowerOfTwo32(c+(c&^(c-1))) |
| => ((SUB|SUBW) (SL(D|W)const <t> x [uint8(log32(c+(c&^(c-1))))]) |
| (SL(D|W)const <t> x [uint8(log32(c&^(c-1)))])) |
| |
| // c = 2ˣ - 2ʸ => -c + 2ˣ = 2ʸ |
| (MULL(D|W)const <t> x [c]) && isPowerOfTwo32(-c+(-c&^(-c-1))) |
| => ((SUB|SUBW) (SL(D|W)const <t> x [uint8(log32(-c&^(-c-1)))]) |
| (SL(D|W)const <t> x [uint8(log32(-c+(-c&^(-c-1))))])) |
| |
| // Fold ADD into MOVDaddr. Odd offsets from SB shouldn't be folded (LARL can't handle them). |
| (ADDconst [c] (MOVDaddr [d] {s} x:(SB))) && ((c+d)&1 == 0) && is32Bit(int64(c)+int64(d)) => (MOVDaddr [c+d] {s} x) |
| (ADDconst [c] (MOVDaddr [d] {s} x)) && x.Op != OpSB && is20Bit(int64(c)+int64(d)) => (MOVDaddr [c+d] {s} x) |
| (ADD idx (MOVDaddr [c] {s} ptr)) && ptr.Op != OpSB => (MOVDaddridx [c] {s} ptr idx) |
| |
| // fold ADDconst into MOVDaddrx |
| (ADDconst [c] (MOVDaddridx [d] {s} x y)) && is20Bit(int64(c)+int64(d)) => (MOVDaddridx [c+d] {s} x y) |
| (MOVDaddridx [c] {s} (ADDconst [d] x) y) && is20Bit(int64(c)+int64(d)) => (MOVDaddridx [c+d] {s} x y) |
| (MOVDaddridx [c] {s} x (ADDconst [d] y)) && is20Bit(int64(c)+int64(d)) => (MOVDaddridx [c+d] {s} x y) |
| |
| // reverse ordering of compare instruction |
| (LOCGR {c} x y (InvertFlags cmp)) => (LOCGR {c.ReverseComparison()} x y cmp) |
| |
| // replace load from same location as preceding store with copy |
| (MOVDload [off] {sym} ptr1 (MOVDstore [off] {sym} ptr2 x _)) && isSamePtr(ptr1, ptr2) => x |
| (MOVWload [off] {sym} ptr1 (MOVWstore [off] {sym} ptr2 x _)) && isSamePtr(ptr1, ptr2) => (MOVWreg x) |
| (MOVHload [off] {sym} ptr1 (MOVHstore [off] {sym} ptr2 x _)) && isSamePtr(ptr1, ptr2) => (MOVHreg x) |
| (MOVBload [off] {sym} ptr1 (MOVBstore [off] {sym} ptr2 x _)) && isSamePtr(ptr1, ptr2) => (MOVBreg x) |
| (MOVWZload [off] {sym} ptr1 (MOVWstore [off] {sym} ptr2 x _)) && isSamePtr(ptr1, ptr2) => (MOVWZreg x) |
| (MOVHZload [off] {sym} ptr1 (MOVHstore [off] {sym} ptr2 x _)) && isSamePtr(ptr1, ptr2) => (MOVHZreg x) |
| (MOVBZload [off] {sym} ptr1 (MOVBstore [off] {sym} ptr2 x _)) && isSamePtr(ptr1, ptr2) => (MOVBZreg x) |
| (MOVDload [off] {sym} ptr1 (FMOVDstore [off] {sym} ptr2 x _)) && isSamePtr(ptr1, ptr2) => (LGDR x) |
| (FMOVDload [off] {sym} ptr1 (MOVDstore [off] {sym} ptr2 x _)) && isSamePtr(ptr1, ptr2) => (LDGR x) |
| (FMOVDload [off] {sym} ptr1 (FMOVDstore [off] {sym} ptr2 x _)) && isSamePtr(ptr1, ptr2) => x |
| (FMOVSload [off] {sym} ptr1 (FMOVSstore [off] {sym} ptr2 x _)) && isSamePtr(ptr1, ptr2) => x |
| |
| // prefer FPR <-> GPR moves over combined load ops |
| (MULLDload <t> [off] {sym} x ptr1 (FMOVDstore [off] {sym} ptr2 y _)) && isSamePtr(ptr1, ptr2) => (MULLD x (LGDR <t> y)) |
| (ADDload <t> [off] {sym} x ptr1 (FMOVDstore [off] {sym} ptr2 y _)) && isSamePtr(ptr1, ptr2) => (ADD x (LGDR <t> y)) |
| (SUBload <t> [off] {sym} x ptr1 (FMOVDstore [off] {sym} ptr2 y _)) && isSamePtr(ptr1, ptr2) => (SUB x (LGDR <t> y)) |
| (ORload <t> [off] {sym} x ptr1 (FMOVDstore [off] {sym} ptr2 y _)) && isSamePtr(ptr1, ptr2) => (OR x (LGDR <t> y)) |
| (ANDload <t> [off] {sym} x ptr1 (FMOVDstore [off] {sym} ptr2 y _)) && isSamePtr(ptr1, ptr2) => (AND x (LGDR <t> y)) |
| (XORload <t> [off] {sym} x ptr1 (FMOVDstore [off] {sym} ptr2 y _)) && isSamePtr(ptr1, ptr2) => (XOR x (LGDR <t> y)) |
| |
| // detect attempts to set/clear the sign bit |
| // may need to be reworked when NIHH/OIHH are added |
| (RISBGZ (LGDR <t> x) {r}) && r == s390x.NewRotateParams(1, 63, 0) => (LGDR <t> (LPDFR <x.Type> x)) |
| (LDGR <t> (RISBGZ x {r})) && r == s390x.NewRotateParams(1, 63, 0) => (LPDFR (LDGR <t> x)) |
| (OR (MOVDconst [-1<<63]) (LGDR <t> x)) => (LGDR <t> (LNDFR <x.Type> x)) |
| (LDGR <t> (OR (MOVDconst [-1<<63]) x)) => (LNDFR (LDGR <t> x)) |
| |
| // detect attempts to set the sign bit with load |
| (LDGR <t> x:(ORload <t1> [off] {sym} (MOVDconst [-1<<63]) ptr mem)) && x.Uses == 1 && clobber(x) => @x.Block (LNDFR <t> (LDGR <t> (MOVDload <t1> [off] {sym} ptr mem))) |
| |
| // detect copysign |
| (OR (RISBGZ (LGDR x) {r}) (LGDR (LPDFR <t> y))) |
| && r == s390x.NewRotateParams(0, 0, 0) |
| => (LGDR (CPSDR <t> y x)) |
| (OR (RISBGZ (LGDR x) {r}) (MOVDconst [c])) |
| && c >= 0 |
| && r == s390x.NewRotateParams(0, 0, 0) |
| => (LGDR (CPSDR <x.Type> (FMOVDconst <x.Type> [math.Float64frombits(uint64(c))]) x)) |
| (CPSDR y (FMOVDconst [c])) && !math.Signbit(c) => (LPDFR y) |
| (CPSDR y (FMOVDconst [c])) && math.Signbit(c) => (LNDFR y) |
| |
| // absorb negations into set/clear sign bit |
| (FNEG (LPDFR x)) => (LNDFR x) |
| (FNEG (LNDFR x)) => (LPDFR x) |
| (FNEGS (LPDFR x)) => (LNDFR x) |
| (FNEGS (LNDFR x)) => (LPDFR x) |
| |
| // no need to convert float32 to float64 to set/clear sign bit |
| (LEDBR (LPDFR (LDEBR x))) => (LPDFR x) |
| (LEDBR (LNDFR (LDEBR x))) => (LNDFR x) |
| |
| // remove unnecessary FPR <-> GPR moves |
| (LDGR (LGDR x)) => x |
| (LGDR (LDGR x)) => x |
| |
| // Don't extend before storing |
| (MOVWstore [off] {sym} ptr (MOVWreg x) mem) => (MOVWstore [off] {sym} ptr x mem) |
| (MOVHstore [off] {sym} ptr (MOVHreg x) mem) => (MOVHstore [off] {sym} ptr x mem) |
| (MOVBstore [off] {sym} ptr (MOVBreg x) mem) => (MOVBstore [off] {sym} ptr x mem) |
| (MOVWstore [off] {sym} ptr (MOVWZreg x) mem) => (MOVWstore [off] {sym} ptr x mem) |
| (MOVHstore [off] {sym} ptr (MOVHZreg x) mem) => (MOVHstore [off] {sym} ptr x mem) |
| (MOVBstore [off] {sym} ptr (MOVBZreg x) mem) => (MOVBstore [off] {sym} ptr x mem) |
| |
| // Fold constants into memory operations. |
| // Note that this is not always a good idea because if not all the uses of |
| // the ADDconst get eliminated, we still have to compute the ADDconst and we now |
| // have potentially two live values (ptr and (ADDconst [off] ptr)) instead of one. |
| // Nevertheless, let's do it! |
| (MOVDload [off1] {sym} (ADDconst [off2] ptr) mem) && is20Bit(int64(off1)+int64(off2)) => (MOVDload [off1+off2] {sym} ptr mem) |
| (MOVWload [off1] {sym} (ADDconst [off2] ptr) mem) && is20Bit(int64(off1)+int64(off2)) => (MOVWload [off1+off2] {sym} ptr mem) |
| (MOVHload [off1] {sym} (ADDconst [off2] ptr) mem) && is20Bit(int64(off1)+int64(off2)) => (MOVHload [off1+off2] {sym} ptr mem) |
| (MOVBload [off1] {sym} (ADDconst [off2] ptr) mem) && is20Bit(int64(off1)+int64(off2)) => (MOVBload [off1+off2] {sym} ptr mem) |
| (MOVWZload [off1] {sym} (ADDconst [off2] ptr) mem) && is20Bit(int64(off1)+int64(off2)) => (MOVWZload [off1+off2] {sym} ptr mem) |
| (MOVHZload [off1] {sym} (ADDconst [off2] ptr) mem) && is20Bit(int64(off1)+int64(off2)) => (MOVHZload [off1+off2] {sym} ptr mem) |
| (MOVBZload [off1] {sym} (ADDconst [off2] ptr) mem) && is20Bit(int64(off1)+int64(off2)) => (MOVBZload [off1+off2] {sym} ptr mem) |
| (FMOVSload [off1] {sym} (ADDconst [off2] ptr) mem) && is20Bit(int64(off1)+int64(off2)) => (FMOVSload [off1+off2] {sym} ptr mem) |
| (FMOVDload [off1] {sym} (ADDconst [off2] ptr) mem) && is20Bit(int64(off1)+int64(off2)) => (FMOVDload [off1+off2] {sym} ptr mem) |
| |
| (MOVDstore [off1] {sym} (ADDconst [off2] ptr) val mem) && is20Bit(int64(off1)+int64(off2)) => (MOVDstore [off1+off2] {sym} ptr val mem) |
| (MOVWstore [off1] {sym} (ADDconst [off2] ptr) val mem) && is20Bit(int64(off1)+int64(off2)) => (MOVWstore [off1+off2] {sym} ptr val mem) |
| (MOVHstore [off1] {sym} (ADDconst [off2] ptr) val mem) && is20Bit(int64(off1)+int64(off2)) => (MOVHstore [off1+off2] {sym} ptr val mem) |
| (MOVBstore [off1] {sym} (ADDconst [off2] ptr) val mem) && is20Bit(int64(off1)+int64(off2)) => (MOVBstore [off1+off2] {sym} ptr val mem) |
| (FMOVSstore [off1] {sym} (ADDconst [off2] ptr) val mem) && is20Bit(int64(off1)+int64(off2)) => (FMOVSstore [off1+off2] {sym} ptr val mem) |
| (FMOVDstore [off1] {sym} (ADDconst [off2] ptr) val mem) && is20Bit(int64(off1)+int64(off2)) => (FMOVDstore [off1+off2] {sym} ptr val mem) |
| |
| (ADDload [off1] {sym} x (ADDconst [off2] ptr) mem) && ptr.Op != OpSB && is20Bit(int64(off1)+int64(off2)) => (ADDload [off1+off2] {sym} x ptr mem) |
| (ADDWload [off1] {sym} x (ADDconst [off2] ptr) mem) && ptr.Op != OpSB && is20Bit(int64(off1)+int64(off2)) => (ADDWload [off1+off2] {sym} x ptr mem) |
| (MULLDload [off1] {sym} x (ADDconst [off2] ptr) mem) && ptr.Op != OpSB && is20Bit(int64(off1)+int64(off2)) => (MULLDload [off1+off2] {sym} x ptr mem) |
| (MULLWload [off1] {sym} x (ADDconst [off2] ptr) mem) && ptr.Op != OpSB && is20Bit(int64(off1)+int64(off2)) => (MULLWload [off1+off2] {sym} x ptr mem) |
| (SUBload [off1] {sym} x (ADDconst [off2] ptr) mem) && ptr.Op != OpSB && is20Bit(int64(off1)+int64(off2)) => (SUBload [off1+off2] {sym} x ptr mem) |
| (SUBWload [off1] {sym} x (ADDconst [off2] ptr) mem) && ptr.Op != OpSB && is20Bit(int64(off1)+int64(off2)) => (SUBWload [off1+off2] {sym} x ptr mem) |
| |
| (ANDload [off1] {sym} x (ADDconst [off2] ptr) mem) && ptr.Op != OpSB && is20Bit(int64(off1)+int64(off2)) => (ANDload [off1+off2] {sym} x ptr mem) |
| (ANDWload [off1] {sym} x (ADDconst [off2] ptr) mem) && ptr.Op != OpSB && is20Bit(int64(off1)+int64(off2)) => (ANDWload [off1+off2] {sym} x ptr mem) |
| (ORload [off1] {sym} x (ADDconst [off2] ptr) mem) && ptr.Op != OpSB && is20Bit(int64(off1)+int64(off2)) => (ORload [off1+off2] {sym} x ptr mem) |
| (ORWload [off1] {sym} x (ADDconst [off2] ptr) mem) && ptr.Op != OpSB && is20Bit(int64(off1)+int64(off2)) => (ORWload [off1+off2] {sym} x ptr mem) |
| (XORload [off1] {sym} x (ADDconst [off2] ptr) mem) && ptr.Op != OpSB && is20Bit(int64(off1)+int64(off2)) => (XORload [off1+off2] {sym} x ptr mem) |
| (XORWload [off1] {sym} x (ADDconst [off2] ptr) mem) && ptr.Op != OpSB && is20Bit(int64(off1)+int64(off2)) => (XORWload [off1+off2] {sym} x ptr mem) |
| |
| // Fold constants into stores. |
| (MOVDstore [off] {sym} ptr (MOVDconst [c]) mem) && is16Bit(c) && isU12Bit(int64(off)) && ptr.Op != OpSB => |
| (MOVDstoreconst [makeValAndOff32(int32(c),off)] {sym} ptr mem) |
| (MOVWstore [off] {sym} ptr (MOVDconst [c]) mem) && is16Bit(c) && isU12Bit(int64(off)) && ptr.Op != OpSB => |
| (MOVWstoreconst [makeValAndOff32(int32(c),off)] {sym} ptr mem) |
| (MOVHstore [off] {sym} ptr (MOVDconst [c]) mem) && isU12Bit(int64(off)) && ptr.Op != OpSB => |
| (MOVHstoreconst [makeValAndOff32(int32(int16(c)),off)] {sym} ptr mem) |
| (MOVBstore [off] {sym} ptr (MOVDconst [c]) mem) && is20Bit(int64(off)) && ptr.Op != OpSB => |
| (MOVBstoreconst [makeValAndOff32(int32(int8(c)),off)] {sym} ptr mem) |
| |
| // Fold address offsets into constant stores. |
| (MOVDstoreconst [sc] {s} (ADDconst [off] ptr) mem) && isU12Bit(sc.Off()+int64(off)) => |
| (MOVDstoreconst [sc.addOffset32(off)] {s} ptr mem) |
| (MOVWstoreconst [sc] {s} (ADDconst [off] ptr) mem) && isU12Bit(sc.Off()+int64(off)) => |
| (MOVWstoreconst [sc.addOffset32(off)] {s} ptr mem) |
| (MOVHstoreconst [sc] {s} (ADDconst [off] ptr) mem) && isU12Bit(sc.Off()+int64(off)) => |
| (MOVHstoreconst [sc.addOffset32(off)] {s} ptr mem) |
| (MOVBstoreconst [sc] {s} (ADDconst [off] ptr) mem) && is20Bit(sc.Off()+int64(off)) => |
| (MOVBstoreconst [sc.addOffset32(off)] {s} ptr mem) |
| |
| // Merge address calculations into loads and stores. |
| // Offsets from SB must not be merged into unaligned memory accesses because |
| // loads/stores using PC-relative addressing directly must be aligned to the |
| // size of the target. |
| (MOVDload [off1] {sym1} (MOVDaddr <t> [off2] {sym2} base) mem) && is32Bit(int64(off1)+int64(off2)) && canMergeSym(sym1, sym2) && (base.Op != OpSB || (t.IsPtr() && t.Elem().Alignment()%8 == 0 && (off1+off2)%8 == 0)) => |
| (MOVDload [off1+off2] {mergeSym(sym1,sym2)} base mem) |
| (MOVWZload [off1] {sym1} (MOVDaddr <t> [off2] {sym2} base) mem) && is32Bit(int64(off1)+int64(off2)) && canMergeSym(sym1, sym2) && (base.Op != OpSB || (t.IsPtr() && t.Elem().Alignment()%4 == 0 && (off1+off2)%4 == 0)) => |
| (MOVWZload [off1+off2] {mergeSym(sym1,sym2)} base mem) |
| (MOVHZload [off1] {sym1} (MOVDaddr <t> [off2] {sym2} base) mem) && is32Bit(int64(off1)+int64(off2)) && canMergeSym(sym1, sym2) && (base.Op != OpSB || (t.IsPtr() && t.Elem().Alignment()%2 == 0 && (off1+off2)%2 == 0)) => |
| (MOVHZload [off1+off2] {mergeSym(sym1,sym2)} base mem) |
| (MOVBZload [off1] {sym1} (MOVDaddr [off2] {sym2} base) mem) && is32Bit(int64(off1)+int64(off2)) && canMergeSym(sym1, sym2) => |
| (MOVBZload [off1+off2] {mergeSym(sym1,sym2)} base mem) |
| (FMOVSload [off1] {sym1} (MOVDaddr [off2] {sym2} base) mem) && is32Bit(int64(off1)+int64(off2)) && canMergeSym(sym1, sym2) => |
| (FMOVSload [off1+off2] {mergeSym(sym1,sym2)} base mem) |
| (FMOVDload [off1] {sym1} (MOVDaddr [off2] {sym2} base) mem) && is32Bit(int64(off1)+int64(off2)) && canMergeSym(sym1, sym2) => |
| (FMOVDload [off1+off2] {mergeSym(sym1,sym2)} base mem) |
| |
| (MOVWload [off1] {sym1} (MOVDaddr <t> [off2] {sym2} base) mem) && is32Bit(int64(off1)+int64(off2)) && canMergeSym(sym1, sym2) && (base.Op != OpSB || (t.IsPtr() && t.Elem().Alignment()%4 == 0 && (off1+off2)%4 == 0)) => |
| (MOVWload [off1+off2] {mergeSym(sym1,sym2)} base mem) |
| (MOVHload [off1] {sym1} (MOVDaddr <t> [off2] {sym2} base) mem) && is32Bit(int64(off1)+int64(off2)) && canMergeSym(sym1, sym2) && (base.Op != OpSB || (t.IsPtr() && t.Elem().Alignment()%2 == 0 && (off1+off2)%2 == 0)) => |
| (MOVHload [off1+off2] {mergeSym(sym1,sym2)} base mem) |
| (MOVBload [off1] {sym1} (MOVDaddr [off2] {sym2} base) mem) && is32Bit(int64(off1)+int64(off2)) && canMergeSym(sym1, sym2) => |
| (MOVBload [off1+off2] {mergeSym(sym1,sym2)} base mem) |
| |
| (MOVDstore [off1] {sym1} (MOVDaddr <t> [off2] {sym2} base) val mem) && is32Bit(int64(off1)+int64(off2)) && canMergeSym(sym1, sym2) && (base.Op != OpSB || (t.IsPtr() && t.Elem().Alignment()%8 == 0 && (off1+off2)%8 == 0)) => |
| (MOVDstore [off1+off2] {mergeSym(sym1,sym2)} base val mem) |
| (MOVWstore [off1] {sym1} (MOVDaddr <t> [off2] {sym2} base) val mem) && is32Bit(int64(off1)+int64(off2)) && canMergeSym(sym1, sym2) && (base.Op != OpSB || (t.IsPtr() && t.Elem().Alignment()%4 == 0 && (off1+off2)%4 == 0)) => |
| (MOVWstore [off1+off2] {mergeSym(sym1,sym2)} base val mem) |
| (MOVHstore [off1] {sym1} (MOVDaddr <t> [off2] {sym2} base) val mem) && is32Bit(int64(off1)+int64(off2)) && canMergeSym(sym1, sym2) && (base.Op != OpSB || (t.IsPtr() && t.Elem().Alignment()%2 == 0 && (off1+off2)%2 == 0)) => |
| (MOVHstore [off1+off2] {mergeSym(sym1,sym2)} base val mem) |
| (MOVBstore [off1] {sym1} (MOVDaddr [off2] {sym2} base) val mem) && is32Bit(int64(off1)+int64(off2)) && canMergeSym(sym1, sym2) => |
| (MOVBstore [off1+off2] {mergeSym(sym1,sym2)} base val mem) |
| (FMOVSstore [off1] {sym1} (MOVDaddr [off2] {sym2} base) val mem) && is32Bit(int64(off1)+int64(off2)) && canMergeSym(sym1, sym2) => |
| (FMOVSstore [off1+off2] {mergeSym(sym1,sym2)} base val mem) |
| (FMOVDstore [off1] {sym1} (MOVDaddr [off2] {sym2} base) val mem) && is32Bit(int64(off1)+int64(off2)) && canMergeSym(sym1, sym2) => |
| (FMOVDstore [off1+off2] {mergeSym(sym1,sym2)} base val mem) |
| |
| (ADDload [o1] {s1} x (MOVDaddr [o2] {s2} ptr) mem) && ptr.Op != OpSB && is20Bit(int64(o1)+int64(o2)) && canMergeSym(s1, s2) => (ADDload [o1+o2] {mergeSym(s1, s2)} x ptr mem) |
| (ADDWload [o1] {s1} x (MOVDaddr [o2] {s2} ptr) mem) && ptr.Op != OpSB && is20Bit(int64(o1)+int64(o2)) && canMergeSym(s1, s2) => (ADDWload [o1+o2] {mergeSym(s1, s2)} x ptr mem) |
| (MULLDload [o1] {s1} x (MOVDaddr [o2] {s2} ptr) mem) && ptr.Op != OpSB && is20Bit(int64(o1)+int64(o2)) && canMergeSym(s1, s2) => (MULLDload [o1+o2] {mergeSym(s1, s2)} x ptr mem) |
| (MULLWload [o1] {s1} x (MOVDaddr [o2] {s2} ptr) mem) && ptr.Op != OpSB && is20Bit(int64(o1)+int64(o2)) && canMergeSym(s1, s2) => (MULLWload [o1+o2] {mergeSym(s1, s2)} x ptr mem) |
| (SUBload [o1] {s1} x (MOVDaddr [o2] {s2} ptr) mem) && ptr.Op != OpSB && is20Bit(int64(o1)+int64(o2)) && canMergeSym(s1, s2) => (SUBload [o1+o2] {mergeSym(s1, s2)} x ptr mem) |
| (SUBWload [o1] {s1} x (MOVDaddr [o2] {s2} ptr) mem) && ptr.Op != OpSB && is20Bit(int64(o1)+int64(o2)) && canMergeSym(s1, s2) => (SUBWload [o1+o2] {mergeSym(s1, s2)} x ptr mem) |
| |
| (ANDload [o1] {s1} x (MOVDaddr [o2] {s2} ptr) mem) && ptr.Op != OpSB && is20Bit(int64(o1)+int64(o2)) && canMergeSym(s1, s2) => (ANDload [o1+o2] {mergeSym(s1, s2)} x ptr mem) |
| (ANDWload [o1] {s1} x (MOVDaddr [o2] {s2} ptr) mem) && ptr.Op != OpSB && is20Bit(int64(o1)+int64(o2)) && canMergeSym(s1, s2) => (ANDWload [o1+o2] {mergeSym(s1, s2)} x ptr mem) |
| (ORload [o1] {s1} x (MOVDaddr [o2] {s2} ptr) mem) && ptr.Op != OpSB && is20Bit(int64(o1)+int64(o2)) && canMergeSym(s1, s2) => (ORload [o1+o2] {mergeSym(s1, s2)} x ptr mem) |
| (ORWload [o1] {s1} x (MOVDaddr [o2] {s2} ptr) mem) && ptr.Op != OpSB && is20Bit(int64(o1)+int64(o2)) && canMergeSym(s1, s2) => (ORWload [o1+o2] {mergeSym(s1, s2)} x ptr mem) |
| (XORload [o1] {s1} x (MOVDaddr [o2] {s2} ptr) mem) && ptr.Op != OpSB && is20Bit(int64(o1)+int64(o2)) && canMergeSym(s1, s2) => (XORload [o1+o2] {mergeSym(s1, s2)} x ptr mem) |
| (XORWload [o1] {s1} x (MOVDaddr [o2] {s2} ptr) mem) && ptr.Op != OpSB && is20Bit(int64(o1)+int64(o2)) && canMergeSym(s1, s2) => (XORWload [o1+o2] {mergeSym(s1, s2)} x ptr mem) |
| |
| // Cannot store constant to SB directly (no 'move relative long immediate' instructions). |
| (MOVDstoreconst [sc] {sym1} (MOVDaddr [off] {sym2} ptr) mem) && ptr.Op != OpSB && canMergeSym(sym1, sym2) && sc.canAdd32(off) => |
| (MOVDstoreconst [sc.addOffset32(off)] {mergeSym(sym1, sym2)} ptr mem) |
| (MOVWstoreconst [sc] {sym1} (MOVDaddr [off] {sym2} ptr) mem) && ptr.Op != OpSB && canMergeSym(sym1, sym2) && sc.canAdd32(off) => |
| (MOVWstoreconst [sc.addOffset32(off)] {mergeSym(sym1, sym2)} ptr mem) |
| (MOVHstoreconst [sc] {sym1} (MOVDaddr [off] {sym2} ptr) mem) && ptr.Op != OpSB && canMergeSym(sym1, sym2) && sc.canAdd32(off) => |
| (MOVHstoreconst [sc.addOffset32(off)] {mergeSym(sym1, sym2)} ptr mem) |
| (MOVBstoreconst [sc] {sym1} (MOVDaddr [off] {sym2} ptr) mem) && ptr.Op != OpSB && canMergeSym(sym1, sym2) && sc.canAdd32(off) => |
| (MOVBstoreconst [sc.addOffset32(off)] {mergeSym(sym1, sym2)} ptr mem) |
| |
| // MOVDaddr into MOVDaddridx |
| (MOVDaddridx [off1] {sym1} (MOVDaddr [off2] {sym2} x) y) && is32Bit(int64(off1)+int64(off2)) && canMergeSym(sym1, sym2) && x.Op != OpSB => |
| (MOVDaddridx [off1+off2] {mergeSym(sym1,sym2)} x y) |
| (MOVDaddridx [off1] {sym1} x (MOVDaddr [off2] {sym2} y)) && is32Bit(int64(off1)+int64(off2)) && canMergeSym(sym1, sym2) && y.Op != OpSB => |
| (MOVDaddridx [off1+off2] {mergeSym(sym1,sym2)} x y) |
| |
| // Absorb InvertFlags into branches. |
| (BRC {c} (InvertFlags cmp) yes no) => (BRC {c.ReverseComparison()} cmp yes no) |
| |
| // Constant comparisons. |
| (CMPconst (MOVDconst [x]) [y]) && x==int64(y) => (FlagEQ) |
| (CMPconst (MOVDconst [x]) [y]) && x<int64(y) => (FlagLT) |
| (CMPconst (MOVDconst [x]) [y]) && x>int64(y) => (FlagGT) |
| (CMPUconst (MOVDconst [x]) [y]) && uint64(x)==uint64(y) => (FlagEQ) |
| (CMPUconst (MOVDconst [x]) [y]) && uint64(x)<uint64(y) => (FlagLT) |
| (CMPUconst (MOVDconst [x]) [y]) && uint64(x)>uint64(y) => (FlagGT) |
| |
| (CMPWconst (MOVDconst [x]) [y]) && int32(x)==int32(y) => (FlagEQ) |
| (CMPWconst (MOVDconst [x]) [y]) && int32(x)<int32(y) => (FlagLT) |
| (CMPWconst (MOVDconst [x]) [y]) && int32(x)>int32(y) => (FlagGT) |
| (CMPWUconst (MOVDconst [x]) [y]) && uint32(x)==uint32(y) => (FlagEQ) |
| (CMPWUconst (MOVDconst [x]) [y]) && uint32(x)<uint32(y) => (FlagLT) |
| (CMPWUconst (MOVDconst [x]) [y]) && uint32(x)>uint32(y) => (FlagGT) |
| |
| (CMP(W|WU)const (MOVBZreg _) [c]) && 0xff < c => (FlagLT) |
| (CMP(W|WU)const (MOVHZreg _) [c]) && 0xffff < c => (FlagLT) |
| |
| (CMPconst (SRDconst _ [c]) [n]) && c > 0 && n < 0 => (FlagGT) |
| (CMPWconst (SRWconst _ [c]) [n]) && c > 0 && n < 0 => (FlagGT) |
| |
| (CMPUconst (SRDconst _ [c]) [n]) && c > 0 && c < 64 && (1<<uint(64-c)) <= uint64(n) => (FlagLT) |
| (CMPWUconst (SRWconst _ [c]) [n]) && c > 0 && c < 32 && (1<<uint(32-c)) <= uint32(n) => (FlagLT) |
| |
| (CMPWconst (ANDWconst _ [m]) [n]) && int32(m) >= 0 && int32(m) < int32(n) => (FlagLT) |
| (CMPWUconst (ANDWconst _ [m]) [n]) && uint32(m) < uint32(n) => (FlagLT) |
| |
| (CMPconst (RISBGZ x {r}) [c]) && c > 0 && r.OutMask() < uint64(c) => (FlagLT) |
| (CMPUconst (RISBGZ x {r}) [c]) && r.OutMask() < uint64(uint32(c)) => (FlagLT) |
| |
| // Constant compare-and-branch with immediate. |
| (CGIJ {c} (MOVDconst [x]) [y] yes no) && c&s390x.Equal != 0 && int64(x) == int64(y) => (First yes no) |
| (CGIJ {c} (MOVDconst [x]) [y] yes no) && c&s390x.Less != 0 && int64(x) < int64(y) => (First yes no) |
| (CGIJ {c} (MOVDconst [x]) [y] yes no) && c&s390x.Greater != 0 && int64(x) > int64(y) => (First yes no) |
| (CIJ {c} (MOVDconst [x]) [y] yes no) && c&s390x.Equal != 0 && int32(x) == int32(y) => (First yes no) |
| (CIJ {c} (MOVDconst [x]) [y] yes no) && c&s390x.Less != 0 && int32(x) < int32(y) => (First yes no) |
| (CIJ {c} (MOVDconst [x]) [y] yes no) && c&s390x.Greater != 0 && int32(x) > int32(y) => (First yes no) |
| (CLGIJ {c} (MOVDconst [x]) [y] yes no) && c&s390x.Equal != 0 && uint64(x) == uint64(y) => (First yes no) |
| (CLGIJ {c} (MOVDconst [x]) [y] yes no) && c&s390x.Less != 0 && uint64(x) < uint64(y) => (First yes no) |
| (CLGIJ {c} (MOVDconst [x]) [y] yes no) && c&s390x.Greater != 0 && uint64(x) > uint64(y) => (First yes no) |
| (CLIJ {c} (MOVDconst [x]) [y] yes no) && c&s390x.Equal != 0 && uint32(x) == uint32(y) => (First yes no) |
| (CLIJ {c} (MOVDconst [x]) [y] yes no) && c&s390x.Less != 0 && uint32(x) < uint32(y) => (First yes no) |
| (CLIJ {c} (MOVDconst [x]) [y] yes no) && c&s390x.Greater != 0 && uint32(x) > uint32(y) => (First yes no) |
| (CGIJ {c} (MOVDconst [x]) [y] yes no) && c&s390x.Equal == 0 && int64(x) == int64(y) => (First no yes) |
| (CGIJ {c} (MOVDconst [x]) [y] yes no) && c&s390x.Less == 0 && int64(x) < int64(y) => (First no yes) |
| (CGIJ {c} (MOVDconst [x]) [y] yes no) && c&s390x.Greater == 0 && int64(x) > int64(y) => (First no yes) |
| (CIJ {c} (MOVDconst [x]) [y] yes no) && c&s390x.Equal == 0 && int32(x) == int32(y) => (First no yes) |
| (CIJ {c} (MOVDconst [x]) [y] yes no) && c&s390x.Less == 0 && int32(x) < int32(y) => (First no yes) |
| (CIJ {c} (MOVDconst [x]) [y] yes no) && c&s390x.Greater == 0 && int32(x) > int32(y) => (First no yes) |
| (CLGIJ {c} (MOVDconst [x]) [y] yes no) && c&s390x.Equal == 0 && uint64(x) == uint64(y) => (First no yes) |
| (CLGIJ {c} (MOVDconst [x]) [y] yes no) && c&s390x.Less == 0 && uint64(x) < uint64(y) => (First no yes) |
| (CLGIJ {c} (MOVDconst [x]) [y] yes no) && c&s390x.Greater == 0 && uint64(x) > uint64(y) => (First no yes) |
| (CLIJ {c} (MOVDconst [x]) [y] yes no) && c&s390x.Equal == 0 && uint32(x) == uint32(y) => (First no yes) |
| (CLIJ {c} (MOVDconst [x]) [y] yes no) && c&s390x.Less == 0 && uint32(x) < uint32(y) => (First no yes) |
| (CLIJ {c} (MOVDconst [x]) [y] yes no) && c&s390x.Greater == 0 && uint32(x) > uint32(y) => (First no yes) |
| |
| // Constant compare-and-branch with immediate when unsigned comparison with zero. |
| (C(L|LG)IJ {s390x.GreaterOrEqual} _ [0] yes no) => (First yes no) |
| (C(L|LG)IJ {s390x.Less} _ [0] yes no) => (First no yes) |
| |
| // Constant compare-and-branch when operands match. |
| (C(GR|R|LGR|LR)J {c} x y yes no) && x == y && c&s390x.Equal != 0 => (First yes no) |
| (C(GR|R|LGR|LR)J {c} x y yes no) && x == y && c&s390x.Equal == 0 => (First no yes) |
| |
| // Convert 64-bit comparisons to 32-bit comparisons and signed comparisons |
| // to unsigned comparisons. |
| // Helps simplify constant comparison detection. |
| (CM(P|PU)const (MOV(W|WZ)reg x) [c]) => (CMP(W|WU)const x [c]) |
| (CM(P|P|PU|PU)const x:(MOV(H|HZ|H|HZ)reg _) [c]) => (CMP(W|W|WU|WU)const x [c]) |
| (CM(P|P|PU|PU)const x:(MOV(B|BZ|B|BZ)reg _) [c]) => (CMP(W|W|WU|WU)const x [c]) |
| (CMPconst (MOV(WZ|W)reg x:(ANDWconst [m] _)) [c]) && int32(m) >= 0 && c >= 0 => (CMPWUconst x [c]) |
| (CMPUconst (MOV(WZ|W)reg x:(ANDWconst [m] _)) [c]) && int32(m) >= 0 => (CMPWUconst x [c]) |
| (CMPconst x:(SRDconst _ [c]) [n]) && c > 0 && n >= 0 => (CMPUconst x [n]) |
| (CMPWconst x:(SRWconst _ [c]) [n]) && c > 0 && n >= 0 => (CMPWUconst x [n]) |
| |
| // Absorb sign and zero extensions into 32-bit comparisons. |
| (CMP(W|W|WU|WU) x (MOV(W|WZ|W|WZ)reg y)) => (CMP(W|W|WU|WU) x y) |
| (CMP(W|W|WU|WU) (MOV(W|WZ|W|WZ)reg x) y) => (CMP(W|W|WU|WU) x y) |
| (CMP(W|W|WU|WU)const (MOV(W|WZ|W|WZ)reg x) [c]) => (CMP(W|W|WU|WU)const x [c]) |
| |
| // Absorb flag constants into branches. |
| (BRC {c} (FlagEQ) yes no) && c&s390x.Equal != 0 => (First yes no) |
| (BRC {c} (FlagLT) yes no) && c&s390x.Less != 0 => (First yes no) |
| (BRC {c} (FlagGT) yes no) && c&s390x.Greater != 0 => (First yes no) |
| (BRC {c} (FlagOV) yes no) && c&s390x.Unordered != 0 => (First yes no) |
| |
| (BRC {c} (FlagEQ) yes no) && c&s390x.Equal == 0 => (First no yes) |
| (BRC {c} (FlagLT) yes no) && c&s390x.Less == 0 => (First no yes) |
| (BRC {c} (FlagGT) yes no) && c&s390x.Greater == 0 => (First no yes) |
| (BRC {c} (FlagOV) yes no) && c&s390x.Unordered == 0 => (First no yes) |
| |
| // Absorb flag constants into SETxx ops. |
| (LOCGR {c} _ x (FlagEQ)) && c&s390x.Equal != 0 => x |
| (LOCGR {c} _ x (FlagLT)) && c&s390x.Less != 0 => x |
| (LOCGR {c} _ x (FlagGT)) && c&s390x.Greater != 0 => x |
| (LOCGR {c} _ x (FlagOV)) && c&s390x.Unordered != 0 => x |
| |
| (LOCGR {c} x _ (FlagEQ)) && c&s390x.Equal == 0 => x |
| (LOCGR {c} x _ (FlagLT)) && c&s390x.Less == 0 => x |
| (LOCGR {c} x _ (FlagGT)) && c&s390x.Greater == 0 => x |
| (LOCGR {c} x _ (FlagOV)) && c&s390x.Unordered == 0 => x |
| |
| // Remove redundant *const ops |
| (ADDconst [0] x) => x |
| (ADDWconst [c] x) && int32(c)==0 => x |
| (SUBconst [0] x) => x |
| (SUBWconst [c] x) && int32(c) == 0 => x |
| (ANDconst [0] _) => (MOVDconst [0]) |
| (ANDWconst [c] _) && int32(c)==0 => (MOVDconst [0]) |
| (ANDconst [-1] x) => x |
| (ANDWconst [c] x) && int32(c)==-1 => x |
| (ORconst [0] x) => x |
| (ORWconst [c] x) && int32(c)==0 => x |
| (ORconst [-1] _) => (MOVDconst [-1]) |
| (ORWconst [c] _) && int32(c)==-1 => (MOVDconst [-1]) |
| (XORconst [0] x) => x |
| (XORWconst [c] x) && int32(c)==0 => x |
| |
| // Shifts by zero (may be inserted during multiplication strength reduction). |
| ((SLD|SLW|SRD|SRW|SRAD|SRAW)const x [0]) => x |
| |
| // Convert constant subtracts to constant adds. |
| (SUBconst [c] x) && c != -(1<<31) => (ADDconst [-c] x) |
| (SUBWconst [c] x) => (ADDWconst [-int32(c)] x) |
| |
| // generic constant folding |
| // TODO: more of this |
| (ADDconst [c] (MOVDconst [d])) => (MOVDconst [int64(c)+d]) |
| (ADDWconst [c] (MOVDconst [d])) => (MOVDconst [int64(c)+d]) |
| (ADDconst [c] (ADDconst [d] x)) && is32Bit(int64(c)+int64(d)) => (ADDconst [c+d] x) |
| (ADDWconst [c] (ADDWconst [d] x)) => (ADDWconst [int32(c+d)] x) |
| (SUBconst (MOVDconst [d]) [c]) => (MOVDconst [d-int64(c)]) |
| (SUBconst (SUBconst x [d]) [c]) && is32Bit(-int64(c)-int64(d)) => (ADDconst [-c-d] x) |
| (SRADconst [c] (MOVDconst [d])) => (MOVDconst [d>>uint64(c)]) |
| (SRAWconst [c] (MOVDconst [d])) => (MOVDconst [int64(int32(d))>>uint64(c)]) |
| (NEG (MOVDconst [c])) => (MOVDconst [-c]) |
| (NEGW (MOVDconst [c])) => (MOVDconst [int64(int32(-c))]) |
| (MULLDconst [c] (MOVDconst [d])) => (MOVDconst [int64(c)*d]) |
| (MULLWconst [c] (MOVDconst [d])) => (MOVDconst [int64(c*int32(d))]) |
| (AND (MOVDconst [c]) (MOVDconst [d])) => (MOVDconst [c&d]) |
| (ANDconst [c] (MOVDconst [d])) => (MOVDconst [c&d]) |
| (ANDWconst [c] (MOVDconst [d])) => (MOVDconst [int64(c)&d]) |
| (OR (MOVDconst [c]) (MOVDconst [d])) => (MOVDconst [c|d]) |
| (ORconst [c] (MOVDconst [d])) => (MOVDconst [c|d]) |
| (ORWconst [c] (MOVDconst [d])) => (MOVDconst [int64(c)|d]) |
| (XOR (MOVDconst [c]) (MOVDconst [d])) => (MOVDconst [c^d]) |
| (XORconst [c] (MOVDconst [d])) => (MOVDconst [c^d]) |
| (XORWconst [c] (MOVDconst [d])) => (MOVDconst [int64(c)^d]) |
| (LoweredRound32F x:(FMOVSconst)) => x |
| (LoweredRound64F x:(FMOVDconst)) => x |
| |
| // generic simplifications |
| // TODO: more of this |
| (ADD x (NEG y)) => (SUB x y) |
| (ADDW x (NEGW y)) => (SUBW x y) |
| (SUB x x) => (MOVDconst [0]) |
| (SUBW x x) => (MOVDconst [0]) |
| (AND x x) => x |
| (ANDW x x) => x |
| (OR x x) => x |
| (ORW x x) => x |
| (XOR x x) => (MOVDconst [0]) |
| (XORW x x) => (MOVDconst [0]) |
| (NEG (ADDconst [c] (NEG x))) && c != -(1<<31) => (ADDconst [-c] x) |
| (MOVBZreg (ANDWconst [m] x)) => (MOVWZreg (ANDWconst <typ.UInt32> [int32( uint8(m))] x)) |
| (MOVHZreg (ANDWconst [m] x)) => (MOVWZreg (ANDWconst <typ.UInt32> [int32(uint16(m))] x)) |
| (MOVBreg (ANDWconst [m] x)) && int8(m) >= 0 => (MOVWZreg (ANDWconst <typ.UInt32> [int32( uint8(m))] x)) |
| (MOVHreg (ANDWconst [m] x)) && int16(m) >= 0 => (MOVWZreg (ANDWconst <typ.UInt32> [int32(uint16(m))] x)) |
| |
| // carry flag generation |
| // (only constant fold carry of zero) |
| (Select1 (ADDCconst (MOVDconst [c]) [d])) |
| && uint64(c+int64(d)) >= uint64(c) && c+int64(d) == 0 |
| => (FlagEQ) |
| (Select1 (ADDCconst (MOVDconst [c]) [d])) |
| && uint64(c+int64(d)) >= uint64(c) && c+int64(d) != 0 |
| => (FlagLT) |
| |
| // borrow flag generation |
| // (only constant fold borrow of zero) |
| (Select1 (SUBC (MOVDconst [c]) (MOVDconst [d]))) |
| && uint64(d) <= uint64(c) && c-d == 0 |
| => (FlagGT) |
| (Select1 (SUBC (MOVDconst [c]) (MOVDconst [d]))) |
| && uint64(d) <= uint64(c) && c-d != 0 |
| => (FlagOV) |
| |
| // add with carry |
| (ADDE x y (FlagEQ)) => (ADDC x y) |
| (ADDE x y (FlagLT)) => (ADDC x y) |
| (ADDC x (MOVDconst [c])) && is16Bit(c) => (ADDCconst x [int16(c)]) |
| (Select0 (ADDCconst (MOVDconst [c]) [d])) => (MOVDconst [c+int64(d)]) |
| |
| // subtract with borrow |
| (SUBE x y (FlagGT)) => (SUBC x y) |
| (SUBE x y (FlagOV)) => (SUBC x y) |
| (Select0 (SUBC (MOVDconst [c]) (MOVDconst [d]))) => (MOVDconst [c-d]) |
| |
| // collapse carry chain |
| (ADDE x y (Select1 (ADDCconst [-1] (Select0 (ADDE (MOVDconst [0]) (MOVDconst [0]) c))))) |
| => (ADDE x y c) |
| |
| // collapse borrow chain |
| (SUBE x y (Select1 (SUBC (MOVDconst [0]) (NEG (Select0 (SUBE (MOVDconst [0]) (MOVDconst [0]) c)))))) |
| => (SUBE x y c) |
| |
| // branch on carry |
| (C(G|LG)IJ {s390x.Equal} (Select0 (ADDE (MOVDconst [0]) (MOVDconst [0]) carry)) [0]) => (BRC {s390x.NoCarry} carry) |
| (C(G|LG)IJ {s390x.Equal} (Select0 (ADDE (MOVDconst [0]) (MOVDconst [0]) carry)) [1]) => (BRC {s390x.Carry} carry) |
| (C(G|LG)IJ {s390x.LessOrGreater} (Select0 (ADDE (MOVDconst [0]) (MOVDconst [0]) carry)) [0]) => (BRC {s390x.Carry} carry) |
| (C(G|LG)IJ {s390x.LessOrGreater} (Select0 (ADDE (MOVDconst [0]) (MOVDconst [0]) carry)) [1]) => (BRC {s390x.NoCarry} carry) |
| (C(G|LG)IJ {s390x.Greater} (Select0 (ADDE (MOVDconst [0]) (MOVDconst [0]) carry)) [0]) => (BRC {s390x.Carry} carry) |
| |
| // branch on borrow |
| (C(G|LG)IJ {s390x.Equal} (NEG (Select0 (SUBE (MOVDconst [0]) (MOVDconst [0]) borrow))) [0]) => (BRC {s390x.NoBorrow} borrow) |
| (C(G|LG)IJ {s390x.Equal} (NEG (Select0 (SUBE (MOVDconst [0]) (MOVDconst [0]) borrow))) [1]) => (BRC {s390x.Borrow} borrow) |
| (C(G|LG)IJ {s390x.LessOrGreater} (NEG (Select0 (SUBE (MOVDconst [0]) (MOVDconst [0]) borrow))) [0]) => (BRC {s390x.Borrow} borrow) |
| (C(G|LG)IJ {s390x.LessOrGreater} (NEG (Select0 (SUBE (MOVDconst [0]) (MOVDconst [0]) borrow))) [1]) => (BRC {s390x.NoBorrow} borrow) |
| (C(G|LG)IJ {s390x.Greater} (NEG (Select0 (SUBE (MOVDconst [0]) (MOVDconst [0]) borrow))) [0]) => (BRC {s390x.Borrow} borrow) |
| |
| // fused multiply-add |
| (Select0 (F(ADD|SUB) (FMUL y z) x)) => (FM(ADD|SUB) x y z) |
| (Select0 (F(ADDS|SUBS) (FMULS y z) x)) => (FM(ADDS|SUBS) x y z) |
| |
| // Convert floating point comparisons against zero into 'load and test' instructions. |
| (F(CMP|CMPS) x (FMOV(D|S)const [0.0])) => (LT(D|E)BR x) |
| (F(CMP|CMPS) (FMOV(D|S)const [0.0]) x) => (InvertFlags (LT(D|E)BR <v.Type> x)) |
| |
| // FSUB, FSUBS, FADD, FADDS now produce a condition code representing the |
| // comparison of the result with 0.0. If a compare with zero instruction |
| // (e.g. LTDBR) is following one of those instructions, we can use the |
| // generated flag and remove the comparison instruction. |
| // Note: when inserting Select1 ops we need to ensure they are in the |
| // same block as their argument. We could also use @x.Block for this |
| // but moving the flag generating value to a different block seems to |
| // increase the likelihood that the flags value will have to be regenerated |
| // by flagalloc which is not what we want. |
| (LTDBR (Select0 x:(F(ADD|SUB) _ _))) && b == x.Block => (Select1 x) |
| (LTEBR (Select0 x:(F(ADDS|SUBS) _ _))) && b == x.Block => (Select1 x) |
| |
| // Fold memory operations into operations. |
| // Exclude global data (SB) because these instructions cannot handle relative addresses. |
| // TODO(mundaym): indexed versions of these? |
| ((ADD|SUB|MULLD|AND|OR|XOR) <t> x g:(MOVDload [off] {sym} ptr mem)) |
| && ptr.Op != OpSB |
| && is20Bit(int64(off)) |
| && canMergeLoadClobber(v, g, x) |
| && clobber(g) |
| => ((ADD|SUB|MULLD|AND|OR|XOR)load <t> [off] {sym} x ptr mem) |
| ((ADD|SUB|MULL|AND|OR|XOR)W <t> x g:(MOVWload [off] {sym} ptr mem)) |
| && ptr.Op != OpSB |
| && is20Bit(int64(off)) |
| && canMergeLoadClobber(v, g, x) |
| && clobber(g) |
| => ((ADD|SUB|MULL|AND|OR|XOR)Wload <t> [off] {sym} x ptr mem) |
| ((ADD|SUB|MULL|AND|OR|XOR)W <t> x g:(MOVWZload [off] {sym} ptr mem)) |
| && ptr.Op != OpSB |
| && is20Bit(int64(off)) |
| && canMergeLoadClobber(v, g, x) |
| && clobber(g) |
| => ((ADD|SUB|MULL|AND|OR|XOR)Wload <t> [off] {sym} x ptr mem) |
| |
| // Combine constant stores into larger (unaligned) stores. |
| // Avoid SB because constant stores to relative offsets are |
| // emulated by the assembler and also can't handle unaligned offsets. |
| (MOVBstoreconst [c] {s} p x:(MOVBstoreconst [a] {s} p mem)) |
| && p.Op != OpSB |
| && x.Uses == 1 |
| && a.Off() + 1 == c.Off() |
| && clobber(x) |
| => (MOVHstoreconst [makeValAndOff32(c.Val32()&0xff | a.Val32()<<8, a.Off32())] {s} p mem) |
| (MOVHstoreconst [c] {s} p x:(MOVHstoreconst [a] {s} p mem)) |
| && p.Op != OpSB |
| && x.Uses == 1 |
| && a.Off() + 2 == c.Off() |
| && clobber(x) |
| => (MOVWstore [a.Off32()] {s} p (MOVDconst [int64(c.Val32()&0xffff | a.Val32()<<16)]) mem) |
| (MOVWstoreconst [c] {s} p x:(MOVWstoreconst [a] {s} p mem)) |
| && p.Op != OpSB |
| && x.Uses == 1 |
| && a.Off() + 4 == c.Off() |
| && clobber(x) |
| => (MOVDstore [a.Off32()] {s} p (MOVDconst [c.Val()&0xffffffff | a.Val()<<32]) mem) |
| |
| // Combine stores into larger (unaligned) stores. |
| // It doesn't work on global data (based on SB) because stores with relative addressing |
| // require that the memory operand be aligned. |
| (MOVBstore [i] {s} p w x:(MOVBstore [i-1] {s} p (SRDconst [8] w) mem)) |
| && p.Op != OpSB |
| && x.Uses == 1 |
| && clobber(x) |
| => (MOVHstore [i-1] {s} p w mem) |
| (MOVBstore [i] {s} p w0:(SRDconst [j] w) x:(MOVBstore [i-1] {s} p (SRDconst [j+8] w) mem)) |
| && p.Op != OpSB |
| && x.Uses == 1 |
| && clobber(x) |
| => (MOVHstore [i-1] {s} p w0 mem) |
| (MOVBstore [i] {s} p w x:(MOVBstore [i-1] {s} p (SRWconst [8] w) mem)) |
| && p.Op != OpSB |
| && x.Uses == 1 |
| && clobber(x) |
| => (MOVHstore [i-1] {s} p w mem) |
| (MOVBstore [i] {s} p w0:(SRWconst [j] w) x:(MOVBstore [i-1] {s} p (SRWconst [j+8] w) mem)) |
| && p.Op != OpSB |
| && x.Uses == 1 |
| && clobber(x) |
| => (MOVHstore [i-1] {s} p w0 mem) |
| (MOVHstore [i] {s} p w x:(MOVHstore [i-2] {s} p (SRDconst [16] w) mem)) |
| && p.Op != OpSB |
| && x.Uses == 1 |
| && clobber(x) |
| => (MOVWstore [i-2] {s} p w mem) |
| (MOVHstore [i] {s} p w0:(SRDconst [j] w) x:(MOVHstore [i-2] {s} p (SRDconst [j+16] w) mem)) |
| && p.Op != OpSB |
| && x.Uses == 1 |
| && clobber(x) |
| => (MOVWstore [i-2] {s} p w0 mem) |
| (MOVHstore [i] {s} p w x:(MOVHstore [i-2] {s} p (SRWconst [16] w) mem)) |
| && p.Op != OpSB |
| && x.Uses == 1 |
| && clobber(x) |
| => (MOVWstore [i-2] {s} p w mem) |
| (MOVHstore [i] {s} p w0:(SRWconst [j] w) x:(MOVHstore [i-2] {s} p (SRWconst [j+16] w) mem)) |
| && p.Op != OpSB |
| && x.Uses == 1 |
| && clobber(x) |
| => (MOVWstore [i-2] {s} p w0 mem) |
| (MOVWstore [i] {s} p (SRDconst [32] w) x:(MOVWstore [i-4] {s} p w mem)) |
| && p.Op != OpSB |
| && x.Uses == 1 |
| && clobber(x) |
| => (MOVDstore [i-4] {s} p w mem) |
| (MOVWstore [i] {s} p w0:(SRDconst [j] w) x:(MOVWstore [i-4] {s} p (SRDconst [j+32] w) mem)) |
| && p.Op != OpSB |
| && x.Uses == 1 |
| && clobber(x) |
| => (MOVDstore [i-4] {s} p w0 mem) |
| |
| // Combine stores into larger (unaligned) stores with the bytes reversed (little endian). |
| // Store-with-bytes-reversed instructions do not support relative memory addresses, |
| // so these stores can't operate on global data (SB). |
| (MOVBstore [i] {s} p (SRDconst [8] w) x:(MOVBstore [i-1] {s} p w mem)) |
| && p.Op != OpSB |
| && x.Uses == 1 |
| && clobber(x) |
| => (MOVHBRstore [i-1] {s} p w mem) |
| (MOVBstore [i] {s} p (SRDconst [j] w) x:(MOVBstore [i-1] {s} p w0:(SRDconst [j-8] w) mem)) |
| && p.Op != OpSB |
| && x.Uses == 1 |
| && clobber(x) |
| => (MOVHBRstore [i-1] {s} p w0 mem) |
| (MOVBstore [i] {s} p (SRWconst [8] w) x:(MOVBstore [i-1] {s} p w mem)) |
| && p.Op != OpSB |
| && x.Uses == 1 |
| && clobber(x) |
| => (MOVHBRstore [i-1] {s} p w mem) |
| (MOVBstore [i] {s} p (SRWconst [j] w) x:(MOVBstore [i-1] {s} p w0:(SRWconst [j-8] w) mem)) |
| && p.Op != OpSB |
| && x.Uses == 1 |
| && clobber(x) |
| => (MOVHBRstore [i-1] {s} p w0 mem) |
| (MOVHBRstore [i] {s} p (SRDconst [16] w) x:(MOVHBRstore [i-2] {s} p w mem)) |
| && x.Uses == 1 |
| && clobber(x) |
| => (MOVWBRstore [i-2] {s} p w mem) |
| (MOVHBRstore [i] {s} p (SRDconst [j] w) x:(MOVHBRstore [i-2] {s} p w0:(SRDconst [j-16] w) mem)) |
| && x.Uses == 1 |
| && clobber(x) |
| => (MOVWBRstore [i-2] {s} p w0 mem) |
| (MOVHBRstore [i] {s} p (SRWconst [16] w) x:(MOVHBRstore [i-2] {s} p w mem)) |
| && x.Uses == 1 |
| && clobber(x) |
| => (MOVWBRstore [i-2] {s} p w mem) |
| (MOVHBRstore [i] {s} p (SRWconst [j] w) x:(MOVHBRstore [i-2] {s} p w0:(SRWconst [j-16] w) mem)) |
| && x.Uses == 1 |
| && clobber(x) |
| => (MOVWBRstore [i-2] {s} p w0 mem) |
| (MOVWBRstore [i] {s} p (SRDconst [32] w) x:(MOVWBRstore [i-4] {s} p w mem)) |
| && x.Uses == 1 |
| && clobber(x) |
| => (MOVDBRstore [i-4] {s} p w mem) |
| (MOVWBRstore [i] {s} p (SRDconst [j] w) x:(MOVWBRstore [i-4] {s} p w0:(SRDconst [j-32] w) mem)) |
| && x.Uses == 1 |
| && clobber(x) |
| => (MOVDBRstore [i-4] {s} p w0 mem) |
| |
| // Combining byte loads into larger (unaligned) loads. |
| |
| // Big-endian loads |
| |
| (ORW x1:(MOVBZload [i1] {s} p mem) |
| sh:(SLWconst [8] x0:(MOVBZload [i0] {s} p mem))) |
| && i1 == i0+1 |
| && p.Op != OpSB |
| && x0.Uses == 1 |
| && x1.Uses == 1 |
| && sh.Uses == 1 |
| && mergePoint(b,x0,x1) != nil |
| && clobber(x0, x1, sh) |
| => @mergePoint(b,x0,x1) (MOVHZload [i0] {s} p mem) |
| |
| (OR x1:(MOVBZload [i1] {s} p mem) |
| sh:(SLDconst [8] x0:(MOVBZload [i0] {s} p mem))) |
| && i1 == i0+1 |
| && p.Op != OpSB |
| && x0.Uses == 1 |
| && x1.Uses == 1 |
| && sh.Uses == 1 |
| && mergePoint(b,x0,x1) != nil |
| && clobber(x0, x1, sh) |
| => @mergePoint(b,x0,x1) (MOVHZload [i0] {s} p mem) |
| |
| (ORW x1:(MOVHZload [i1] {s} p mem) |
| sh:(SLWconst [16] x0:(MOVHZload [i0] {s} p mem))) |
| && i1 == i0+2 |
| && p.Op != OpSB |
| && x0.Uses == 1 |
| && x1.Uses == 1 |
| && sh.Uses == 1 |
| && mergePoint(b,x0,x1) != nil |
| && clobber(x0, x1, sh) |
| => @mergePoint(b,x0,x1) (MOVWZload [i0] {s} p mem) |
| |
| (OR x1:(MOVHZload [i1] {s} p mem) |
| sh:(SLDconst [16] x0:(MOVHZload [i0] {s} p mem))) |
| && i1 == i0+2 |
| && p.Op != OpSB |
| && x0.Uses == 1 |
| && x1.Uses == 1 |
| && sh.Uses == 1 |
| && mergePoint(b,x0,x1) != nil |
| && clobber(x0, x1, sh) |
| => @mergePoint(b,x0,x1) (MOVWZload [i0] {s} p mem) |
| |
| (OR x1:(MOVWZload [i1] {s} p mem) |
| sh:(SLDconst [32] x0:(MOVWZload [i0] {s} p mem))) |
| && i1 == i0+4 |
| && p.Op != OpSB |
| && x0.Uses == 1 |
| && x1.Uses == 1 |
| && sh.Uses == 1 |
| && mergePoint(b,x0,x1) != nil |
| && clobber(x0, x1, sh) |
| => @mergePoint(b,x0,x1) (MOVDload [i0] {s} p mem) |
| |
| (ORW |
| s0:(SLWconst [j0] x0:(MOVBZload [i0] {s} p mem)) |
| or:(ORW |
| s1:(SLWconst [j1] x1:(MOVBZload [i1] {s} p mem)) |
| y)) |
| && i1 == i0+1 |
| && j1 == j0-8 |
| && j1 % 16 == 0 |
| && x0.Uses == 1 |
| && x1.Uses == 1 |
| && s0.Uses == 1 |
| && s1.Uses == 1 |
| && or.Uses == 1 |
| && mergePoint(b,x0,x1,y) != nil |
| && clobber(x0, x1, s0, s1, or) |
| => @mergePoint(b,x0,x1,y) (ORW <v.Type> (SLWconst <v.Type> [j1] (MOVHZload [i0] {s} p mem)) y) |
| |
| (OR |
| s0:(SLDconst [j0] x0:(MOVBZload [i0] {s} p mem)) |
| or:(OR |
| s1:(SLDconst [j1] x1:(MOVBZload [i1] {s} p mem)) |
| y)) |
| && i1 == i0+1 |
| && j1 == j0-8 |
| && j1 % 16 == 0 |
| && x0.Uses == 1 |
| && x1.Uses == 1 |
| && s0.Uses == 1 |
| && s1.Uses == 1 |
| && or.Uses == 1 |
| && mergePoint(b,x0,x1,y) != nil |
| && clobber(x0, x1, s0, s1, or) |
| => @mergePoint(b,x0,x1,y) (OR <v.Type> (SLDconst <v.Type> [j1] (MOVHZload [i0] {s} p mem)) y) |
| |
| (OR |
| s0:(SLDconst [j0] x0:(MOVHZload [i0] {s} p mem)) |
| or:(OR |
| s1:(SLDconst [j1] x1:(MOVHZload [i1] {s} p mem)) |
| y)) |
| && i1 == i0+2 |
| && j1 == j0-16 |
| && j1 % 32 == 0 |
| && x0.Uses == 1 |
| && x1.Uses == 1 |
| && s0.Uses == 1 |
| && s1.Uses == 1 |
| && or.Uses == 1 |
| && mergePoint(b,x0,x1,y) != nil |
| && clobber(x0, x1, s0, s1, or) |
| => @mergePoint(b,x0,x1,y) (OR <v.Type> (SLDconst <v.Type> [j1] (MOVWZload [i0] {s} p mem)) y) |
| |
| // Little-endian loads |
| |
| (ORW x0:(MOVBZload [i0] {s} p mem) |
| sh:(SLWconst [8] x1:(MOVBZload [i1] {s} p mem))) |
| && p.Op != OpSB |
| && i1 == i0+1 |
| && x0.Uses == 1 |
| && x1.Uses == 1 |
| && sh.Uses == 1 |
| && mergePoint(b,x0,x1) != nil |
| && clobber(x0, x1, sh) |
| => @mergePoint(b,x0,x1) (MOVHZreg (MOVHBRload [i0] {s} p mem)) |
| |
| (OR x0:(MOVBZload [i0] {s} p mem) |
| sh:(SLDconst [8] x1:(MOVBZload [i1] {s} p mem))) |
| && p.Op != OpSB |
| && i1 == i0+1 |
| && x0.Uses == 1 |
| && x1.Uses == 1 |
| && sh.Uses == 1 |
| && mergePoint(b,x0,x1) != nil |
| && clobber(x0, x1, sh) |
| => @mergePoint(b,x0,x1) (MOVHZreg (MOVHBRload [i0] {s} p mem)) |
| |
| (ORW r0:(MOVHZreg x0:(MOVHBRload [i0] {s} p mem)) |
| sh:(SLWconst [16] r1:(MOVHZreg x1:(MOVHBRload [i1] {s} p mem)))) |
| && i1 == i0+2 |
| && x0.Uses == 1 |
| && x1.Uses == 1 |
| && r0.Uses == 1 |
| && r1.Uses == 1 |
| && sh.Uses == 1 |
| && mergePoint(b,x0,x1) != nil |
| && clobber(x0, x1, r0, r1, sh) |
| => @mergePoint(b,x0,x1) (MOVWBRload [i0] {s} p mem) |
| |
| (OR r0:(MOVHZreg x0:(MOVHBRload [i0] {s} p mem)) |
| sh:(SLDconst [16] r1:(MOVHZreg x1:(MOVHBRload [i1] {s} p mem)))) |
| && i1 == i0+2 |
| && x0.Uses == 1 |
| && x1.Uses == 1 |
| && r0.Uses == 1 |
| && r1.Uses == 1 |
| && sh.Uses == 1 |
| && mergePoint(b,x0,x1) != nil |
| && clobber(x0, x1, r0, r1, sh) |
| => @mergePoint(b,x0,x1) (MOVWZreg (MOVWBRload [i0] {s} p mem)) |
| |
| (OR r0:(MOVWZreg x0:(MOVWBRload [i0] {s} p mem)) |
| sh:(SLDconst [32] r1:(MOVWZreg x1:(MOVWBRload [i1] {s} p mem)))) |
| && i1 == i0+4 |
| && x0.Uses == 1 |
| && x1.Uses == 1 |
| && r0.Uses == 1 |
| && r1.Uses == 1 |
| && sh.Uses == 1 |
| && mergePoint(b,x0,x1) != nil |
| && clobber(x0, x1, r0, r1, sh) |
| => @mergePoint(b,x0,x1) (MOVDBRload [i0] {s} p mem) |
| |
| (ORW |
| s1:(SLWconst [j1] x1:(MOVBZload [i1] {s} p mem)) |
| or:(ORW |
| s0:(SLWconst [j0] x0:(MOVBZload [i0] {s} p mem)) |
| y)) |
| && p.Op != OpSB |
| && i1 == i0+1 |
| && j1 == j0+8 |
| && j0 % 16 == 0 |
| && x0.Uses == 1 |
| && x1.Uses == 1 |
| && s0.Uses == 1 |
| && s1.Uses == 1 |
| && or.Uses == 1 |
| && mergePoint(b,x0,x1,y) != nil |
| && clobber(x0, x1, s0, s1, or) |
| => @mergePoint(b,x0,x1,y) (ORW <v.Type> (SLWconst <v.Type> [j0] (MOVHZreg (MOVHBRload [i0] {s} p mem))) y) |
| |
| (OR |
| s1:(SLDconst [j1] x1:(MOVBZload [i1] {s} p mem)) |
| or:(OR |
| s0:(SLDconst [j0] x0:(MOVBZload [i0] {s} p mem)) |
| y)) |
| && p.Op != OpSB |
| && i1 == i0+1 |
| && j1 == j0+8 |
| && j0 % 16 == 0 |
| && x0.Uses == 1 |
| && x1.Uses == 1 |
| && s0.Uses == 1 |
| && s1.Uses == 1 |
| && or.Uses == 1 |
| && mergePoint(b,x0,x1,y) != nil |
| && clobber(x0, x1, s0, s1, or) |
| => @mergePoint(b,x0,x1,y) (OR <v.Type> (SLDconst <v.Type> [j0] (MOVHZreg (MOVHBRload [i0] {s} p mem))) y) |
| |
| (OR |
| s1:(SLDconst [j1] r1:(MOVHZreg x1:(MOVHBRload [i1] {s} p mem))) |
| or:(OR |
| s0:(SLDconst [j0] r0:(MOVHZreg x0:(MOVHBRload [i0] {s} p mem))) |
| y)) |
| && i1 == i0+2 |
| && j1 == j0+16 |
| && j0 % 32 == 0 |
| && x0.Uses == 1 |
| && x1.Uses == 1 |
| && r0.Uses == 1 |
| && r1.Uses == 1 |
| && s0.Uses == 1 |
| && s1.Uses == 1 |
| && or.Uses == 1 |
| && mergePoint(b,x0,x1,y) != nil |
| && clobber(x0, x1, r0, r1, s0, s1, or) |
| => @mergePoint(b,x0,x1,y) (OR <v.Type> (SLDconst <v.Type> [j0] (MOVWZreg (MOVWBRload [i0] {s} p mem))) y) |
| |
| // Combine stores into store multiples. |
| // 32-bit |
| (MOVWstore [i] {s} p w1 x:(MOVWstore [i-4] {s} p w0 mem)) |
| && p.Op != OpSB |
| && x.Uses == 1 |
| && is20Bit(int64(i)-4) |
| && clobber(x) |
| => (STM2 [i-4] {s} p w0 w1 mem) |
| (MOVWstore [i] {s} p w2 x:(STM2 [i-8] {s} p w0 w1 mem)) |
| && x.Uses == 1 |
| && is20Bit(int64(i)-8) |
| && clobber(x) |
| => (STM3 [i-8] {s} p w0 w1 w2 mem) |
| (MOVWstore [i] {s} p w3 x:(STM3 [i-12] {s} p w0 w1 w2 mem)) |
| && x.Uses == 1 |
| && is20Bit(int64(i)-12) |
| && clobber(x) |
| => (STM4 [i-12] {s} p w0 w1 w2 w3 mem) |
| (STM2 [i] {s} p w2 w3 x:(STM2 [i-8] {s} p w0 w1 mem)) |
| && x.Uses == 1 |
| && is20Bit(int64(i)-8) |
| && clobber(x) |
| => (STM4 [i-8] {s} p w0 w1 w2 w3 mem) |
| // 64-bit |
| (MOVDstore [i] {s} p w1 x:(MOVDstore [i-8] {s} p w0 mem)) |
| && p.Op != OpSB |
| && x.Uses == 1 |
| && is20Bit(int64(i)-8) |
| && clobber(x) |
| => (STMG2 [i-8] {s} p w0 w1 mem) |
| (MOVDstore [i] {s} p w2 x:(STMG2 [i-16] {s} p w0 w1 mem)) |
| && x.Uses == 1 |
| && is20Bit(int64(i)-16) |
| && clobber(x) |
| => (STMG3 [i-16] {s} p w0 w1 w2 mem) |
| (MOVDstore [i] {s} p w3 x:(STMG3 [i-24] {s} p w0 w1 w2 mem)) |
| && x.Uses == 1 |
| && is20Bit(int64(i)-24) |
| && clobber(x) |
| => (STMG4 [i-24] {s} p w0 w1 w2 w3 mem) |
| (STMG2 [i] {s} p w2 w3 x:(STMG2 [i-16] {s} p w0 w1 mem)) |
| && x.Uses == 1 |
| && is20Bit(int64(i)-16) |
| && clobber(x) |
| => (STMG4 [i-16] {s} p w0 w1 w2 w3 mem) |
| |
| // Convert 32-bit store multiples into 64-bit stores. |
| (STM2 [i] {s} p (SRDconst [32] x) x mem) => (MOVDstore [i] {s} p x mem) |
