| // 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. |
| |
| // +build ignore |
| |
| package main |
| |
| import "strings" |
| |
| // Notes: |
| // - Integer types live in the low portion of registers. Upper portions are junk. |
| // - Boolean types use the low-order byte of a register. 0=false, 1=true. |
| // Upper bytes are junk. |
| // - Floating-point types live in the low natural slot of an sse2 register. |
| // Unused portions are junk. |
| // - We do not use AH,BH,CH,DH registers. |
| // - When doing sub-register operations, we try to write the whole |
| // destination register to avoid a partial-register write. |
| // - Unused portions of AuxInt (or the Val portion of ValAndOff) are |
| // filled by sign-extending the used portion. Users of AuxInt which interpret |
| // AuxInt as unsigned (e.g. shifts) must be careful. |
| |
| // Suffixes encode the bit width of various instructions. |
| // L (long word) = 32 bit |
| // W (word) = 16 bit |
| // B (byte) = 8 bit |
| |
| // copied from ../../x86/reg.go |
| var regNames386 = []string{ |
| "AX", |
| "CX", |
| "DX", |
| "BX", |
| "SP", |
| "BP", |
| "SI", |
| "DI", |
| "X0", |
| "X1", |
| "X2", |
| "X3", |
| "X4", |
| "X5", |
| "X6", |
| "X7", |
| |
| // pseudo-registers |
| "SB", |
| } |
| |
| // Notes on 387 support. |
| // - The 387 has a weird stack-register setup for floating-point registers. |
| // We use these registers when SSE registers are not available (when GO386=387). |
| // - We use the same register names (X0-X7) but they refer to the 387 |
| // floating-point registers. That way, most of the SSA backend is unchanged. |
| // - The instruction generation pass maintains an SSE->387 register mapping. |
| // This mapping is updated whenever the FP stack is pushed or popped so that |
| // we can always find a given SSE register even when the TOS pointer has changed. |
| // - To facilitate the mapping from SSE to 387, we enforce that |
| // every basic block starts and ends with an empty floating-point stack. |
| |
| func init() { |
| // Make map from reg names to reg integers. |
| if len(regNames386) > 64 { |
| panic("too many registers") |
| } |
| num := map[string]int{} |
| for i, name := range regNames386 { |
| num[name] = i |
| } |
| buildReg := func(s string) regMask { |
| m := regMask(0) |
| for _, r := range strings.Split(s, " ") { |
| if n, ok := num[r]; ok { |
| m |= regMask(1) << uint(n) |
| continue |
| } |
| panic("register " + r + " not found") |
| } |
| return m |
| } |
| |
| // Common individual register masks |
| var ( |
| ax = buildReg("AX") |
| cx = buildReg("CX") |
| dx = buildReg("DX") |
| gp = buildReg("AX CX DX BX BP SI DI") |
| fp = buildReg("X0 X1 X2 X3 X4 X5 X6 X7") |
| gpsp = gp | buildReg("SP") |
| gpspsb = gpsp | buildReg("SB") |
| callerSave = gp | fp |
| ) |
| // Common slices of register masks |
| var ( |
| gponly = []regMask{gp} |
| fponly = []regMask{fp} |
| ) |
| |
| // Common regInfo |
| var ( |
| gp01 = regInfo{inputs: nil, outputs: gponly} |
| gp11 = regInfo{inputs: []regMask{gp}, outputs: gponly} |
| gp11sp = regInfo{inputs: []regMask{gpsp}, outputs: gponly} |
| gp11sb = regInfo{inputs: []regMask{gpspsb}, outputs: gponly} |
| gp21 = regInfo{inputs: []regMask{gp, gp}, outputs: gponly} |
| gp11carry = regInfo{inputs: []regMask{gp}, outputs: []regMask{gp, 0}} |
| gp21carry = regInfo{inputs: []regMask{gp, gp}, outputs: []regMask{gp, 0}} |
| gp1carry1 = regInfo{inputs: []regMask{gp}, outputs: gponly} |
| gp2carry1 = regInfo{inputs: []regMask{gp, gp}, outputs: gponly} |
| gp21sp = regInfo{inputs: []regMask{gpsp, gp}, outputs: gponly} |
| gp21sb = regInfo{inputs: []regMask{gpspsb, gpsp}, outputs: gponly} |
| gp21shift = regInfo{inputs: []regMask{gp, cx}, outputs: []regMask{gp}} |
| gp11div = regInfo{inputs: []regMask{ax, gpsp &^ dx}, outputs: []regMask{ax}, clobbers: dx} |
| gp21hmul = regInfo{inputs: []regMask{ax, gpsp}, outputs: []regMask{dx}, clobbers: ax} |
| gp11mod = regInfo{inputs: []regMask{ax, gpsp &^ dx}, outputs: []regMask{dx}, clobbers: ax} |
| gp21mul = regInfo{inputs: []regMask{ax, gpsp}, outputs: []regMask{dx, ax}} |
| |
| gp2flags = regInfo{inputs: []regMask{gpsp, gpsp}} |
| gp1flags = regInfo{inputs: []regMask{gpsp}} |
| gp0flagsLoad = regInfo{inputs: []regMask{gpspsb, 0}} |
| gp1flagsLoad = regInfo{inputs: []regMask{gpspsb, gpsp, 0}} |
| flagsgp = regInfo{inputs: nil, outputs: gponly} |
| |
| readflags = regInfo{inputs: nil, outputs: gponly} |
| flagsgpax = regInfo{inputs: nil, clobbers: ax, outputs: []regMask{gp &^ ax}} |
| |
| gpload = regInfo{inputs: []regMask{gpspsb, 0}, outputs: gponly} |
| gp21load = regInfo{inputs: []regMask{gp, gpspsb, 0}, outputs: gponly} |
| gploadidx = regInfo{inputs: []regMask{gpspsb, gpsp, 0}, outputs: gponly} |
| |
| gpstore = regInfo{inputs: []regMask{gpspsb, gpsp, 0}} |
| gpstoreconst = regInfo{inputs: []regMask{gpspsb, 0}} |
| gpstoreidx = regInfo{inputs: []regMask{gpspsb, gpsp, gpsp, 0}} |
| gpstoreconstidx = regInfo{inputs: []regMask{gpspsb, gpsp, 0}} |
| |
| fp01 = regInfo{inputs: nil, outputs: fponly} |
| fp21 = regInfo{inputs: []regMask{fp, fp}, outputs: fponly} |
| fp21load = regInfo{inputs: []regMask{fp, gpspsb, 0}, outputs: fponly} |
| fpgp = regInfo{inputs: fponly, outputs: gponly} |
| gpfp = regInfo{inputs: gponly, outputs: fponly} |
| fp11 = regInfo{inputs: fponly, outputs: fponly} |
| fp2flags = regInfo{inputs: []regMask{fp, fp}} |
| |
| fpload = regInfo{inputs: []regMask{gpspsb, 0}, outputs: fponly} |
| fploadidx = regInfo{inputs: []regMask{gpspsb, gpsp, 0}, outputs: fponly} |
| |
| fpstore = regInfo{inputs: []regMask{gpspsb, fp, 0}} |
| fpstoreidx = regInfo{inputs: []regMask{gpspsb, gpsp, fp, 0}} |
| ) |
| |
| var _386ops = []opData{ |
| // fp ops |
| {name: "ADDSS", argLength: 2, reg: fp21, asm: "ADDSS", commutative: true, resultInArg0: true, usesScratch: true}, // fp32 add |
| {name: "ADDSD", argLength: 2, reg: fp21, asm: "ADDSD", commutative: true, resultInArg0: true}, // fp64 add |
| {name: "SUBSS", argLength: 2, reg: fp21, asm: "SUBSS", resultInArg0: true, usesScratch: true}, // fp32 sub |
| {name: "SUBSD", argLength: 2, reg: fp21, asm: "SUBSD", resultInArg0: true}, // fp64 sub |
| {name: "MULSS", argLength: 2, reg: fp21, asm: "MULSS", commutative: true, resultInArg0: true, usesScratch: true}, // fp32 mul |
| {name: "MULSD", argLength: 2, reg: fp21, asm: "MULSD", commutative: true, resultInArg0: true}, // fp64 mul |
| {name: "DIVSS", argLength: 2, reg: fp21, asm: "DIVSS", resultInArg0: true, usesScratch: true}, // fp32 div |
| {name: "DIVSD", argLength: 2, reg: fp21, asm: "DIVSD", resultInArg0: true}, // fp64 div |
| |
| {name: "MOVSSload", argLength: 2, reg: fpload, asm: "MOVSS", aux: "SymOff", faultOnNilArg0: true, symEffect: "Read"}, // fp32 load |
| {name: "MOVSDload", argLength: 2, reg: fpload, asm: "MOVSD", aux: "SymOff", faultOnNilArg0: true, symEffect: "Read"}, // fp64 load |
| {name: "MOVSSconst", reg: fp01, asm: "MOVSS", aux: "Float32", rematerializeable: true}, // fp32 constant |
| {name: "MOVSDconst", reg: fp01, asm: "MOVSD", aux: "Float64", rematerializeable: true}, // fp64 constant |
| {name: "MOVSSloadidx1", argLength: 3, reg: fploadidx, asm: "MOVSS", aux: "SymOff", symEffect: "Read"}, // fp32 load indexed by i |
| {name: "MOVSSloadidx4", argLength: 3, reg: fploadidx, asm: "MOVSS", aux: "SymOff", symEffect: "Read"}, // fp32 load indexed by 4*i |
| {name: "MOVSDloadidx1", argLength: 3, reg: fploadidx, asm: "MOVSD", aux: "SymOff", symEffect: "Read"}, // fp64 load indexed by i |
| {name: "MOVSDloadidx8", argLength: 3, reg: fploadidx, asm: "MOVSD", aux: "SymOff", symEffect: "Read"}, // fp64 load indexed by 8*i |
| |
| {name: "MOVSSstore", argLength: 3, reg: fpstore, asm: "MOVSS", aux: "SymOff", faultOnNilArg0: true, symEffect: "Write"}, // fp32 store |
| {name: "MOVSDstore", argLength: 3, reg: fpstore, asm: "MOVSD", aux: "SymOff", faultOnNilArg0: true, symEffect: "Write"}, // fp64 store |
| {name: "MOVSSstoreidx1", argLength: 4, reg: fpstoreidx, asm: "MOVSS", aux: "SymOff", symEffect: "Write"}, // fp32 indexed by i store |
| {name: "MOVSSstoreidx4", argLength: 4, reg: fpstoreidx, asm: "MOVSS", aux: "SymOff", symEffect: "Write"}, // fp32 indexed by 4i store |
| {name: "MOVSDstoreidx1", argLength: 4, reg: fpstoreidx, asm: "MOVSD", aux: "SymOff", symEffect: "Write"}, // fp64 indexed by i store |
| {name: "MOVSDstoreidx8", argLength: 4, reg: fpstoreidx, asm: "MOVSD", aux: "SymOff", symEffect: "Write"}, // fp64 indexed by 8i store |
| |
| {name: "ADDSSload", argLength: 3, reg: fp21load, asm: "ADDSS", aux: "SymOff", resultInArg0: true, faultOnNilArg1: true, symEffect: "Read"}, // fp32 arg0 + tmp, tmp loaded from arg1+auxint+aux, arg2 = mem |
| {name: "ADDSDload", argLength: 3, reg: fp21load, asm: "ADDSD", aux: "SymOff", resultInArg0: true, faultOnNilArg1: true, symEffect: "Read"}, // fp64 arg0 + tmp, tmp loaded from arg1+auxint+aux, arg2 = mem |
| {name: "SUBSSload", argLength: 3, reg: fp21load, asm: "SUBSS", aux: "SymOff", resultInArg0: true, faultOnNilArg1: true, symEffect: "Read"}, // fp32 arg0 - tmp, tmp loaded from arg1+auxint+aux, arg2 = mem |
| {name: "SUBSDload", argLength: 3, reg: fp21load, asm: "SUBSD", aux: "SymOff", resultInArg0: true, faultOnNilArg1: true, symEffect: "Read"}, // fp64 arg0 - tmp, tmp loaded from arg1+auxint+aux, arg2 = mem |
| {name: "MULSSload", argLength: 3, reg: fp21load, asm: "MULSS", aux: "SymOff", resultInArg0: true, faultOnNilArg1: true, symEffect: "Read"}, // fp32 arg0 * tmp, tmp loaded from arg1+auxint+aux, arg2 = mem |
| {name: "MULSDload", argLength: 3, reg: fp21load, asm: "MULSD", aux: "SymOff", resultInArg0: true, faultOnNilArg1: true, symEffect: "Read"}, // fp64 arg0 * tmp, tmp loaded from arg1+auxint+aux, arg2 = mem |
| {name: "DIVSSload", argLength: 3, reg: fp21load, asm: "DIVSS", aux: "SymOff", resultInArg0: true, faultOnNilArg1: true, symEffect: "Read"}, // fp32 arg0 / tmp, tmp loaded from arg1+auxint+aux, arg2 = mem |
| {name: "DIVSDload", argLength: 3, reg: fp21load, asm: "DIVSD", aux: "SymOff", resultInArg0: true, faultOnNilArg1: true, symEffect: "Read"}, // fp64 arg0 / tmp, tmp loaded from arg1+auxint+aux, arg2 = mem |
| |
| // binary ops |
| {name: "ADDL", argLength: 2, reg: gp21sp, asm: "ADDL", commutative: true, clobberFlags: true}, // arg0 + arg1 |
| {name: "ADDLconst", argLength: 1, reg: gp11sp, asm: "ADDL", aux: "Int32", typ: "UInt32", clobberFlags: true}, // arg0 + auxint |
| |
| {name: "ADDLcarry", argLength: 2, reg: gp21carry, asm: "ADDL", commutative: true, resultInArg0: true}, // arg0 + arg1, generates <carry,result> pair |
| {name: "ADDLconstcarry", argLength: 1, reg: gp11carry, asm: "ADDL", aux: "Int32", resultInArg0: true}, // arg0 + auxint, generates <carry,result> pair |
| {name: "ADCL", argLength: 3, reg: gp2carry1, asm: "ADCL", commutative: true, resultInArg0: true, clobberFlags: true}, // arg0+arg1+carry(arg2), where arg2 is flags |
| {name: "ADCLconst", argLength: 2, reg: gp1carry1, asm: "ADCL", aux: "Int32", resultInArg0: true, clobberFlags: true}, // arg0+auxint+carry(arg1), where arg1 is flags |
| |
| {name: "SUBL", argLength: 2, reg: gp21, asm: "SUBL", resultInArg0: true, clobberFlags: true}, // arg0 - arg1 |
| {name: "SUBLconst", argLength: 1, reg: gp11, asm: "SUBL", aux: "Int32", resultInArg0: true, clobberFlags: true}, // arg0 - auxint |
| |
| {name: "SUBLcarry", argLength: 2, reg: gp21carry, asm: "SUBL", resultInArg0: true}, // arg0-arg1, generates <borrow,result> pair |
| {name: "SUBLconstcarry", argLength: 1, reg: gp11carry, asm: "SUBL", aux: "Int32", resultInArg0: true}, // arg0-auxint, generates <borrow,result> pair |
| {name: "SBBL", argLength: 3, reg: gp2carry1, asm: "SBBL", resultInArg0: true, clobberFlags: true}, // arg0-arg1-borrow(arg2), where arg2 is flags |
| {name: "SBBLconst", argLength: 2, reg: gp1carry1, asm: "SBBL", aux: "Int32", resultInArg0: true, clobberFlags: true}, // arg0-auxint-borrow(arg1), where arg1 is flags |
| |
| {name: "MULL", argLength: 2, reg: gp21, asm: "IMULL", commutative: true, resultInArg0: true, clobberFlags: true}, // arg0 * arg1 |
| {name: "MULLconst", argLength: 1, reg: gp11, asm: "IMUL3L", aux: "Int32", clobberFlags: true}, // arg0 * auxint |
| |
| {name: "HMULL", argLength: 2, reg: gp21hmul, commutative: true, asm: "IMULL", clobberFlags: true}, // (arg0 * arg1) >> width |
| {name: "HMULLU", argLength: 2, reg: gp21hmul, commutative: true, asm: "MULL", clobberFlags: true}, // (arg0 * arg1) >> width |
| |
| {name: "MULLQU", argLength: 2, reg: gp21mul, commutative: true, asm: "MULL", clobberFlags: true}, // arg0 * arg1, high 32 in result[0], low 32 in result[1] |
| |
| {name: "AVGLU", argLength: 2, reg: gp21, commutative: true, resultInArg0: true, clobberFlags: true}, // (arg0 + arg1) / 2 as unsigned, all 32 result bits |
| |
| {name: "DIVL", argLength: 2, reg: gp11div, asm: "IDIVL", clobberFlags: true}, // arg0 / arg1 |
| {name: "DIVW", argLength: 2, reg: gp11div, asm: "IDIVW", clobberFlags: true}, // arg0 / arg1 |
| {name: "DIVLU", argLength: 2, reg: gp11div, asm: "DIVL", clobberFlags: true}, // arg0 / arg1 |
| {name: "DIVWU", argLength: 2, reg: gp11div, asm: "DIVW", clobberFlags: true}, // arg0 / arg1 |
| |
| {name: "MODL", argLength: 2, reg: gp11mod, asm: "IDIVL", clobberFlags: true}, // arg0 % arg1 |
| {name: "MODW", argLength: 2, reg: gp11mod, asm: "IDIVW", clobberFlags: true}, // arg0 % arg1 |
| {name: "MODLU", argLength: 2, reg: gp11mod, asm: "DIVL", clobberFlags: true}, // arg0 % arg1 |
| {name: "MODWU", argLength: 2, reg: gp11mod, asm: "DIVW", clobberFlags: true}, // arg0 % arg1 |
| |
| {name: "ANDL", argLength: 2, reg: gp21, asm: "ANDL", commutative: true, resultInArg0: true, clobberFlags: true}, // arg0 & arg1 |
| {name: "ANDLconst", argLength: 1, reg: gp11, asm: "ANDL", aux: "Int32", resultInArg0: true, clobberFlags: true}, // arg0 & auxint |
| |
| {name: "ORL", argLength: 2, reg: gp21, asm: "ORL", commutative: true, resultInArg0: true, clobberFlags: true}, // arg0 | arg1 |
| {name: "ORLconst", argLength: 1, reg: gp11, asm: "ORL", aux: "Int32", resultInArg0: true, clobberFlags: true}, // arg0 | auxint |
| |
| {name: "XORL", argLength: 2, reg: gp21, asm: "XORL", commutative: true, resultInArg0: true, clobberFlags: true}, // arg0 ^ arg1 |
| {name: "XORLconst", argLength: 1, reg: gp11, asm: "XORL", aux: "Int32", resultInArg0: true, clobberFlags: true}, // arg0 ^ auxint |
| |
| {name: "CMPL", argLength: 2, reg: gp2flags, asm: "CMPL", typ: "Flags"}, // arg0 compare to arg1 |
| {name: "CMPW", argLength: 2, reg: gp2flags, asm: "CMPW", typ: "Flags"}, // arg0 compare to arg1 |
| {name: "CMPB", argLength: 2, reg: gp2flags, asm: "CMPB", typ: "Flags"}, // arg0 compare to arg1 |
| {name: "CMPLconst", argLength: 1, reg: gp1flags, asm: "CMPL", typ: "Flags", aux: "Int32"}, // arg0 compare to auxint |
| {name: "CMPWconst", argLength: 1, reg: gp1flags, asm: "CMPW", typ: "Flags", aux: "Int16"}, // arg0 compare to auxint |
| {name: "CMPBconst", argLength: 1, reg: gp1flags, asm: "CMPB", typ: "Flags", aux: "Int8"}, // arg0 compare to auxint |
| |
| // compare *(arg0+auxint+aux) to arg1 (in that order). arg2=mem. |
| {name: "CMPLload", argLength: 3, reg: gp1flagsLoad, asm: "CMPL", aux: "SymOff", typ: "Flags", symEffect: "Read", faultOnNilArg0: true}, |
| {name: "CMPWload", argLength: 3, reg: gp1flagsLoad, asm: "CMPW", aux: "SymOff", typ: "Flags", symEffect: "Read", faultOnNilArg0: true}, |
| {name: "CMPBload", argLength: 3, reg: gp1flagsLoad, asm: "CMPB", aux: "SymOff", typ: "Flags", symEffect: "Read", faultOnNilArg0: true}, |
| |
| // compare *(arg0+ValAndOff(AuxInt).Off()+aux) to ValAndOff(AuxInt).Val() (in that order). arg1=mem. |
| {name: "CMPLconstload", argLength: 2, reg: gp0flagsLoad, asm: "CMPL", aux: "SymValAndOff", typ: "Flags", symEffect: "Read", faultOnNilArg0: true}, |
| {name: "CMPWconstload", argLength: 2, reg: gp0flagsLoad, asm: "CMPW", aux: "SymValAndOff", typ: "Flags", symEffect: "Read", faultOnNilArg0: true}, |
| {name: "CMPBconstload", argLength: 2, reg: gp0flagsLoad, asm: "CMPB", aux: "SymValAndOff", typ: "Flags", symEffect: "Read", faultOnNilArg0: true}, |
| |
| {name: "UCOMISS", argLength: 2, reg: fp2flags, asm: "UCOMISS", typ: "Flags", usesScratch: true}, // arg0 compare to arg1, f32 |
| {name: "UCOMISD", argLength: 2, reg: fp2flags, asm: "UCOMISD", typ: "Flags", usesScratch: true}, // arg0 compare to arg1, f64 |
| |
| {name: "TESTL", argLength: 2, reg: gp2flags, commutative: true, asm: "TESTL", typ: "Flags"}, // (arg0 & arg1) compare to 0 |
| {name: "TESTW", argLength: 2, reg: gp2flags, commutative: true, asm: "TESTW", typ: "Flags"}, // (arg0 & arg1) compare to 0 |
| {name: "TESTB", argLength: 2, reg: gp2flags, commutative: true, asm: "TESTB", typ: "Flags"}, // (arg0 & arg1) compare to 0 |
| {name: "TESTLconst", argLength: 1, reg: gp1flags, asm: "TESTL", typ: "Flags", aux: "Int32"}, // (arg0 & auxint) compare to 0 |
| {name: "TESTWconst", argLength: 1, reg: gp1flags, asm: "TESTW", typ: "Flags", aux: "Int16"}, // (arg0 & auxint) compare to 0 |
| {name: "TESTBconst", argLength: 1, reg: gp1flags, asm: "TESTB", typ: "Flags", aux: "Int8"}, // (arg0 & auxint) compare to 0 |
| |
| {name: "SHLL", argLength: 2, reg: gp21shift, asm: "SHLL", resultInArg0: true, clobberFlags: true}, // arg0 << arg1, shift amount is mod 32 |
| {name: "SHLLconst", argLength: 1, reg: gp11, asm: "SHLL", aux: "Int32", resultInArg0: true, clobberFlags: true}, // arg0 << auxint, shift amount 0-31 |
| // Note: x86 is weird, the 16 and 8 byte shifts still use all 5 bits of shift amount! |
| |
| {name: "SHRL", argLength: 2, reg: gp21shift, asm: "SHRL", resultInArg0: true, clobberFlags: true}, // unsigned arg0 >> arg1, shift amount is mod 32 |
| {name: "SHRW", argLength: 2, reg: gp21shift, asm: "SHRW", resultInArg0: true, clobberFlags: true}, // unsigned arg0 >> arg1, shift amount is mod 32 |
| {name: "SHRB", argLength: 2, reg: gp21shift, asm: "SHRB", resultInArg0: true, clobberFlags: true}, // unsigned arg0 >> arg1, shift amount is mod 32 |
| {name: "SHRLconst", argLength: 1, reg: gp11, asm: "SHRL", aux: "Int32", resultInArg0: true, clobberFlags: true}, // unsigned arg0 >> auxint, shift amount 0-31 |
| {name: "SHRWconst", argLength: 1, reg: gp11, asm: "SHRW", aux: "Int16", resultInArg0: true, clobberFlags: true}, // unsigned arg0 >> auxint, shift amount 0-15 |
| {name: "SHRBconst", argLength: 1, reg: gp11, asm: "SHRB", aux: "Int8", resultInArg0: true, clobberFlags: true}, // unsigned arg0 >> auxint, shift amount 0-7 |
| |
| {name: "SARL", argLength: 2, reg: gp21shift, asm: "SARL", resultInArg0: true, clobberFlags: true}, // signed arg0 >> arg1, shift amount is mod 32 |
| {name: "SARW", argLength: 2, reg: gp21shift, asm: "SARW", resultInArg0: true, clobberFlags: true}, // signed arg0 >> arg1, shift amount is mod 32 |
| {name: "SARB", argLength: 2, reg: gp21shift, asm: "SARB", resultInArg0: true, clobberFlags: true}, // signed arg0 >> arg1, shift amount is mod 32 |
| {name: "SARLconst", argLength: 1, reg: gp11, asm: "SARL", aux: "Int32", resultInArg0: true, clobberFlags: true}, // signed arg0 >> auxint, shift amount 0-31 |
| {name: "SARWconst", argLength: 1, reg: gp11, asm: "SARW", aux: "Int16", resultInArg0: true, clobberFlags: true}, // signed arg0 >> auxint, shift amount 0-15 |
| {name: "SARBconst", argLength: 1, reg: gp11, asm: "SARB", aux: "Int8", resultInArg0: true, clobberFlags: true}, // signed arg0 >> auxint, shift amount 0-7 |
| |
| {name: "ROLLconst", argLength: 1, reg: gp11, asm: "ROLL", aux: "Int32", resultInArg0: true, clobberFlags: true}, // arg0 rotate left auxint, rotate amount 0-31 |
| {name: "ROLWconst", argLength: 1, reg: gp11, asm: "ROLW", aux: "Int16", resultInArg0: true, clobberFlags: true}, // arg0 rotate left auxint, rotate amount 0-15 |
| {name: "ROLBconst", argLength: 1, reg: gp11, asm: "ROLB", aux: "Int8", resultInArg0: true, clobberFlags: true}, // arg0 rotate left auxint, rotate amount 0-7 |
| |
| {name: "ADDLload", argLength: 3, reg: gp21load, asm: "ADDL", aux: "SymOff", resultInArg0: true, clobberFlags: true, faultOnNilArg1: true, symEffect: "Read"}, // arg0 + tmp, tmp loaded from arg1+auxint+aux, arg2 = mem |
| {name: "SUBLload", argLength: 3, reg: gp21load, asm: "SUBL", aux: "SymOff", resultInArg0: true, clobberFlags: true, faultOnNilArg1: true, symEffect: "Read"}, // arg0 - tmp, tmp loaded from arg1+auxint+aux, arg2 = mem |
| {name: "MULLload", argLength: 3, reg: gp21load, asm: "IMULL", aux: "SymOff", resultInArg0: true, clobberFlags: true, faultOnNilArg1: true, symEffect: "Read"}, // arg0 * tmp, tmp loaded from arg1+auxint+aux, arg2 = mem |
| {name: "ANDLload", argLength: 3, reg: gp21load, asm: "ANDL", aux: "SymOff", resultInArg0: true, clobberFlags: true, faultOnNilArg1: true, symEffect: "Read"}, // arg0 & tmp, tmp loaded from arg1+auxint+aux, arg2 = mem |
| {name: "ORLload", argLength: 3, reg: gp21load, asm: "ORL", aux: "SymOff", resultInArg0: true, clobberFlags: true, faultOnNilArg1: true, symEffect: "Read"}, // arg0 | tmp, tmp loaded from arg1+auxint+aux, arg2 = mem |
| {name: "XORLload", argLength: 3, reg: gp21load, asm: "XORL", aux: "SymOff", resultInArg0: true, clobberFlags: true, faultOnNilArg1: true, symEffect: "Read"}, // arg0 ^ tmp, tmp loaded from arg1+auxint+aux, arg2 = mem |
| |
| // unary ops |
| {name: "NEGL", argLength: 1, reg: gp11, asm: "NEGL", resultInArg0: true, clobberFlags: true}, // -arg0 |
| |
| {name: "NOTL", argLength: 1, reg: gp11, asm: "NOTL", resultInArg0: true, clobberFlags: true}, // ^arg0 |
| |
| {name: "BSFL", argLength: 1, reg: gp11, asm: "BSFL", clobberFlags: true}, // arg0 # of low-order zeroes ; undef if zero |
| {name: "BSFW", argLength: 1, reg: gp11, asm: "BSFW", clobberFlags: true}, // arg0 # of low-order zeroes ; undef if zero |
| |
| {name: "BSRL", argLength: 1, reg: gp11, asm: "BSRL", clobberFlags: true}, // arg0 # of high-order zeroes ; undef if zero |
| {name: "BSRW", argLength: 1, reg: gp11, asm: "BSRW", clobberFlags: true}, // arg0 # of high-order zeroes ; undef if zero |
| |
| {name: "BSWAPL", argLength: 1, reg: gp11, asm: "BSWAPL", resultInArg0: true, clobberFlags: true}, // arg0 swap bytes |
| |
| {name: "SQRTSD", argLength: 1, reg: fp11, asm: "SQRTSD"}, // sqrt(arg0) |
| |
| {name: "SBBLcarrymask", argLength: 1, reg: flagsgp, asm: "SBBL"}, // (int32)(-1) if carry is set, 0 if carry is clear. |
| // Note: SBBW and SBBB are subsumed by SBBL |
| |
| {name: "SETEQ", argLength: 1, reg: readflags, asm: "SETEQ"}, // extract == condition from arg0 |
| {name: "SETNE", argLength: 1, reg: readflags, asm: "SETNE"}, // extract != condition from arg0 |
| {name: "SETL", argLength: 1, reg: readflags, asm: "SETLT"}, // extract signed < condition from arg0 |
| {name: "SETLE", argLength: 1, reg: readflags, asm: "SETLE"}, // extract signed <= condition from arg0 |
| {name: "SETG", argLength: 1, reg: readflags, asm: "SETGT"}, // extract signed > condition from arg0 |
| {name: "SETGE", argLength: 1, reg: readflags, asm: "SETGE"}, // extract signed >= condition from arg0 |
| {name: "SETB", argLength: 1, reg: readflags, asm: "SETCS"}, // extract unsigned < condition from arg0 |
| {name: "SETBE", argLength: 1, reg: readflags, asm: "SETLS"}, // extract unsigned <= condition from arg0 |
| {name: "SETA", argLength: 1, reg: readflags, asm: "SETHI"}, // extract unsigned > condition from arg0 |
| {name: "SETAE", argLength: 1, reg: readflags, asm: "SETCC"}, // extract unsigned >= condition from arg0 |
| // Need different opcodes for floating point conditions because |
| // any comparison involving a NaN is always FALSE and thus |
| // the patterns for inverting conditions cannot be used. |
| {name: "SETEQF", argLength: 1, reg: flagsgpax, asm: "SETEQ", clobberFlags: true}, // extract == condition from arg0 |
| {name: "SETNEF", argLength: 1, reg: flagsgpax, asm: "SETNE", clobberFlags: true}, // extract != condition from arg0 |
| {name: "SETORD", argLength: 1, reg: flagsgp, asm: "SETPC"}, // extract "ordered" (No Nan present) condition from arg0 |
| {name: "SETNAN", argLength: 1, reg: flagsgp, asm: "SETPS"}, // extract "unordered" (Nan present) condition from arg0 |
| |
| {name: "SETGF", argLength: 1, reg: flagsgp, asm: "SETHI"}, // extract floating > condition from arg0 |
| {name: "SETGEF", argLength: 1, reg: flagsgp, asm: "SETCC"}, // extract floating >= condition from arg0 |
| |
| {name: "MOVBLSX", argLength: 1, reg: gp11, asm: "MOVBLSX"}, // sign extend arg0 from int8 to int32 |
| {name: "MOVBLZX", argLength: 1, reg: gp11, asm: "MOVBLZX"}, // zero extend arg0 from int8 to int32 |
| {name: "MOVWLSX", argLength: 1, reg: gp11, asm: "MOVWLSX"}, // sign extend arg0 from int16 to int32 |
| {name: "MOVWLZX", argLength: 1, reg: gp11, asm: "MOVWLZX"}, // zero extend arg0 from int16 to int32 |
| |
| {name: "MOVLconst", reg: gp01, asm: "MOVL", typ: "UInt32", aux: "Int32", rematerializeable: true}, // 32 low bits of auxint |
| |
| {name: "CVTTSD2SL", argLength: 1, reg: fpgp, asm: "CVTTSD2SL", usesScratch: true}, // convert float64 to int32 |
| {name: "CVTTSS2SL", argLength: 1, reg: fpgp, asm: "CVTTSS2SL", usesScratch: true}, // convert float32 to int32 |
| {name: "CVTSL2SS", argLength: 1, reg: gpfp, asm: "CVTSL2SS", usesScratch: true}, // convert int32 to float32 |
| {name: "CVTSL2SD", argLength: 1, reg: gpfp, asm: "CVTSL2SD", usesScratch: true}, // convert int32 to float64 |
| {name: "CVTSD2SS", argLength: 1, reg: fp11, asm: "CVTSD2SS", usesScratch: true}, // convert float64 to float32 |
| {name: "CVTSS2SD", argLength: 1, reg: fp11, asm: "CVTSS2SD"}, // convert float32 to float64 |
| |
| {name: "PXOR", argLength: 2, reg: fp21, asm: "PXOR", commutative: true, resultInArg0: true}, // exclusive or, applied to X regs for float negation. |
| |
| {name: "LEAL", argLength: 1, reg: gp11sb, aux: "SymOff", rematerializeable: true, symEffect: "Addr"}, // arg0 + auxint + offset encoded in aux |
| {name: "LEAL1", argLength: 2, reg: gp21sb, commutative: true, aux: "SymOff", symEffect: "Addr"}, // arg0 + arg1 + auxint + aux |
| {name: "LEAL2", argLength: 2, reg: gp21sb, aux: "SymOff", symEffect: "Addr"}, // arg0 + 2*arg1 + auxint + aux |
| {name: "LEAL4", argLength: 2, reg: gp21sb, aux: "SymOff", symEffect: "Addr"}, // arg0 + 4*arg1 + auxint + aux |
| {name: "LEAL8", argLength: 2, reg: gp21sb, aux: "SymOff", symEffect: "Addr"}, // arg0 + 8*arg1 + auxint + aux |
| // Note: LEAL{1,2,4,8} must not have OpSB as either argument. |
| |
| // auxint+aux == add auxint and the offset of the symbol in aux (if any) to the effective address |
| {name: "MOVBload", argLength: 2, reg: gpload, asm: "MOVBLZX", aux: "SymOff", typ: "UInt8", faultOnNilArg0: true, symEffect: "Read"}, // load byte from arg0+auxint+aux. arg1=mem. Zero extend. |
| {name: "MOVBLSXload", argLength: 2, reg: gpload, asm: "MOVBLSX", aux: "SymOff", faultOnNilArg0: true, symEffect: "Read"}, // ditto, sign extend to int32 |
| {name: "MOVWload", argLength: 2, reg: gpload, asm: "MOVWLZX", aux: "SymOff", typ: "UInt16", faultOnNilArg0: true, symEffect: "Read"}, // load 2 bytes from arg0+auxint+aux. arg1=mem. Zero extend. |
| {name: "MOVWLSXload", argLength: 2, reg: gpload, asm: "MOVWLSX", aux: "SymOff", faultOnNilArg0: true, symEffect: "Read"}, // ditto, sign extend to int32 |
| {name: "MOVLload", argLength: 2, reg: gpload, asm: "MOVL", aux: "SymOff", typ: "UInt32", faultOnNilArg0: true, symEffect: "Read"}, // load 4 bytes from arg0+auxint+aux. arg1=mem. Zero extend. |
| {name: "MOVBstore", argLength: 3, reg: gpstore, asm: "MOVB", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // store byte in arg1 to arg0+auxint+aux. arg2=mem |
| {name: "MOVWstore", argLength: 3, reg: gpstore, asm: "MOVW", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // store 2 bytes in arg1 to arg0+auxint+aux. arg2=mem |
| {name: "MOVLstore", argLength: 3, reg: gpstore, asm: "MOVL", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // store 4 bytes in arg1 to arg0+auxint+aux. arg2=mem |
| |
| // direct binary-op on memory (read-modify-write) |
| {name: "ADDLmodify", argLength: 3, reg: gpstore, asm: "ADDL", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, clobberFlags: true, symEffect: "Read,Write"}, // *(arg0+auxint+aux) += arg1, arg2=mem |
| {name: "SUBLmodify", argLength: 3, reg: gpstore, asm: "SUBL", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, clobberFlags: true, symEffect: "Read,Write"}, // *(arg0+auxint+aux) -= arg1, arg2=mem |
| {name: "ANDLmodify", argLength: 3, reg: gpstore, asm: "ANDL", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, clobberFlags: true, symEffect: "Read,Write"}, // *(arg0+auxint+aux) &= arg1, arg2=mem |
| {name: "ORLmodify", argLength: 3, reg: gpstore, asm: "ORL", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, clobberFlags: true, symEffect: "Read,Write"}, // *(arg0+auxint+aux) |= arg1, arg2=mem |
| {name: "XORLmodify", argLength: 3, reg: gpstore, asm: "XORL", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, clobberFlags: true, symEffect: "Read,Write"}, // *(arg0+auxint+aux) ^= arg1, arg2=mem |
| |
| // direct binary-op on memory with a constant (read-modify-write) |
| {name: "ADDLconstmodify", argLength: 2, reg: gpstoreconst, asm: "ADDL", aux: "SymValAndOff", typ: "Mem", clobberFlags: true, faultOnNilArg0: true, symEffect: "Read,Write"}, // add ValAndOff(AuxInt).Val() to arg0+ValAndOff(AuxInt).Off()+aux, arg1=mem |
| {name: "ANDLconstmodify", argLength: 2, reg: gpstoreconst, asm: "ANDL", aux: "SymValAndOff", typ: "Mem", clobberFlags: true, faultOnNilArg0: true, symEffect: "Read,Write"}, // and ValAndOff(AuxInt).Val() to arg0+ValAndOff(AuxInt).Off()+aux, arg1=mem |
| {name: "ORLconstmodify", argLength: 2, reg: gpstoreconst, asm: "ORL", aux: "SymValAndOff", typ: "Mem", clobberFlags: true, faultOnNilArg0: true, symEffect: "Read,Write"}, // or ValAndOff(AuxInt).Val() to arg0+ValAndOff(AuxInt).Off()+aux, arg1=mem |
| {name: "XORLconstmodify", argLength: 2, reg: gpstoreconst, asm: "XORL", aux: "SymValAndOff", typ: "Mem", clobberFlags: true, faultOnNilArg0: true, symEffect: "Read,Write"}, // xor ValAndOff(AuxInt).Val() to arg0+ValAndOff(AuxInt).Off()+aux, arg1=mem |
| |
| // indexed loads/stores |
| {name: "MOVBloadidx1", argLength: 3, reg: gploadidx, commutative: true, asm: "MOVBLZX", aux: "SymOff", symEffect: "Read"}, // load a byte from arg0+arg1+auxint+aux. arg2=mem |
| {name: "MOVWloadidx1", argLength: 3, reg: gploadidx, commutative: true, asm: "MOVWLZX", aux: "SymOff", symEffect: "Read"}, // load 2 bytes from arg0+arg1+auxint+aux. arg2=mem |
| {name: "MOVWloadidx2", argLength: 3, reg: gploadidx, asm: "MOVWLZX", aux: "SymOff", symEffect: "Read"}, // load 2 bytes from arg0+2*arg1+auxint+aux. arg2=mem |
| {name: "MOVLloadidx1", argLength: 3, reg: gploadidx, commutative: true, asm: "MOVL", aux: "SymOff", symEffect: "Read"}, // load 4 bytes from arg0+arg1+auxint+aux. arg2=mem |
| {name: "MOVLloadidx4", argLength: 3, reg: gploadidx, asm: "MOVL", aux: "SymOff", symEffect: "Read"}, // load 4 bytes from arg0+4*arg1+auxint+aux. arg2=mem |
| // TODO: sign-extending indexed loads |
| {name: "MOVBstoreidx1", argLength: 4, reg: gpstoreidx, commutative: true, asm: "MOVB", aux: "SymOff", symEffect: "Write"}, // store byte in arg2 to arg0+arg1+auxint+aux. arg3=mem |
| {name: "MOVWstoreidx1", argLength: 4, reg: gpstoreidx, commutative: true, asm: "MOVW", aux: "SymOff", symEffect: "Write"}, // store 2 bytes in arg2 to arg0+arg1+auxint+aux. arg3=mem |
| {name: "MOVWstoreidx2", argLength: 4, reg: gpstoreidx, asm: "MOVW", aux: "SymOff", symEffect: "Write"}, // store 2 bytes in arg2 to arg0+2*arg1+auxint+aux. arg3=mem |
| {name: "MOVLstoreidx1", argLength: 4, reg: gpstoreidx, commutative: true, asm: "MOVL", aux: "SymOff", symEffect: "Write"}, // store 4 bytes in arg2 to arg0+arg1+auxint+aux. arg3=mem |
| {name: "MOVLstoreidx4", argLength: 4, reg: gpstoreidx, asm: "MOVL", aux: "SymOff", symEffect: "Write"}, // store 4 bytes in arg2 to arg0+4*arg1+auxint+aux. arg3=mem |
| // TODO: add size-mismatched indexed loads, like MOVBstoreidx4. |
| |
| // For storeconst ops, the AuxInt field encodes both |
| // the value to store and an address offset of the store. |
| // Cast AuxInt to a ValAndOff to extract Val and Off fields. |
| {name: "MOVBstoreconst", argLength: 2, reg: gpstoreconst, asm: "MOVB", aux: "SymValAndOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // store low byte of ValAndOff(AuxInt).Val() to arg0+ValAndOff(AuxInt).Off()+aux. arg1=mem |
| {name: "MOVWstoreconst", argLength: 2, reg: gpstoreconst, asm: "MOVW", aux: "SymValAndOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // store low 2 bytes of ... |
| {name: "MOVLstoreconst", argLength: 2, reg: gpstoreconst, asm: "MOVL", aux: "SymValAndOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // store low 4 bytes of ... |
| |
| {name: "MOVBstoreconstidx1", argLength: 3, reg: gpstoreconstidx, asm: "MOVB", aux: "SymValAndOff", typ: "Mem", symEffect: "Write"}, // store low byte of ValAndOff(AuxInt).Val() to arg0+1*arg1+ValAndOff(AuxInt).Off()+aux. arg2=mem |
| {name: "MOVWstoreconstidx1", argLength: 3, reg: gpstoreconstidx, asm: "MOVW", aux: "SymValAndOff", typ: "Mem", symEffect: "Write"}, // store low 2 bytes of ... arg1 ... |
| {name: "MOVWstoreconstidx2", argLength: 3, reg: gpstoreconstidx, asm: "MOVW", aux: "SymValAndOff", typ: "Mem", symEffect: "Write"}, // store low 2 bytes of ... 2*arg1 ... |
| {name: "MOVLstoreconstidx1", argLength: 3, reg: gpstoreconstidx, asm: "MOVL", aux: "SymValAndOff", typ: "Mem", symEffect: "Write"}, // store low 4 bytes of ... arg1 ... |
| {name: "MOVLstoreconstidx4", argLength: 3, reg: gpstoreconstidx, asm: "MOVL", aux: "SymValAndOff", typ: "Mem", symEffect: "Write"}, // store low 4 bytes of ... 4*arg1 ... |
| |
| // arg0 = pointer to start of memory to zero |
| // arg1 = value to store (will always be zero) |
| // arg2 = mem |
| // auxint = offset into duffzero code to start executing |
| // returns mem |
| { |
| name: "DUFFZERO", |
| aux: "Int64", |
| argLength: 3, |
| reg: regInfo{ |
| inputs: []regMask{buildReg("DI"), buildReg("AX")}, |
| clobbers: buildReg("DI CX"), |
| // Note: CX is only clobbered when dynamic linking. |
| }, |
| faultOnNilArg0: true, |
| }, |
| |
| // arg0 = address of memory to zero |
| // arg1 = # of 4-byte words to zero |
| // arg2 = value to store (will always be zero) |
| // arg3 = mem |
| // returns mem |
| { |
| name: "REPSTOSL", |
| argLength: 4, |
| reg: regInfo{ |
| inputs: []regMask{buildReg("DI"), buildReg("CX"), buildReg("AX")}, |
| clobbers: buildReg("DI CX"), |
| }, |
| faultOnNilArg0: true, |
| }, |
| |
| {name: "CALLstatic", argLength: 1, reg: regInfo{clobbers: callerSave}, aux: "SymOff", clobberFlags: true, call: true, symEffect: "None"}, // call static function aux.(*obj.LSym). arg0=mem, auxint=argsize, returns mem |
| {name: "CALLclosure", argLength: 3, reg: regInfo{inputs: []regMask{gpsp, buildReg("DX"), 0}, clobbers: callerSave}, aux: "Int64", clobberFlags: true, call: true}, // call function via closure. arg0=codeptr, arg1=closure, arg2=mem, auxint=argsize, returns mem |
| {name: "CALLinter", argLength: 2, reg: regInfo{inputs: []regMask{gp}, clobbers: callerSave}, aux: "Int64", clobberFlags: true, call: true}, // call fn by pointer. arg0=codeptr, arg1=mem, auxint=argsize, returns mem |
| |
| // arg0 = destination pointer |
| // arg1 = source pointer |
| // arg2 = mem |
| // auxint = offset from duffcopy symbol to call |
| // returns memory |
| { |
| name: "DUFFCOPY", |
| aux: "Int64", |
| argLength: 3, |
| reg: regInfo{ |
| inputs: []regMask{buildReg("DI"), buildReg("SI")}, |
| clobbers: buildReg("DI SI CX"), // uses CX as a temporary |
| }, |
| clobberFlags: true, |
| faultOnNilArg0: true, |
| faultOnNilArg1: true, |
| }, |
| |
| // arg0 = destination pointer |
| // arg1 = source pointer |
| // arg2 = # of 8-byte words to copy |
| // arg3 = mem |
| // returns memory |
| { |
| name: "REPMOVSL", |
| argLength: 4, |
| reg: regInfo{ |
| inputs: []regMask{buildReg("DI"), buildReg("SI"), buildReg("CX")}, |
| clobbers: buildReg("DI SI CX"), |
| }, |
| faultOnNilArg0: true, |
| faultOnNilArg1: true, |
| }, |
| |
| // (InvertFlags (CMPL a b)) == (CMPL b a) |
| // So if we want (SETL (CMPL a b)) but we can't do that because a is a constant, |
| // then we do (SETL (InvertFlags (CMPL b a))) instead. |
| // Rewrites will convert this to (SETG (CMPL b a)). |
| // InvertFlags is a pseudo-op which can't appear in assembly output. |
| {name: "InvertFlags", argLength: 1}, // reverse direction of arg0 |
| |
| // Pseudo-ops |
| {name: "LoweredGetG", argLength: 1, reg: gp01}, // arg0=mem |
| // Scheduler ensures LoweredGetClosurePtr occurs only in entry block, |
| // and sorts it to the very beginning of the block to prevent other |
| // use of DX (the closure pointer) |
| {name: "LoweredGetClosurePtr", reg: regInfo{outputs: []regMask{buildReg("DX")}}, zeroWidth: true}, |
| // LoweredGetCallerPC evaluates to the PC to which its "caller" will return. |
| // I.e., if f calls g "calls" getcallerpc, |
| // the result should be the PC within f that g will return to. |
| // See runtime/stubs.go for a more detailed discussion. |
| {name: "LoweredGetCallerPC", reg: gp01, rematerializeable: true}, |
| // LoweredGetCallerSP returns the SP of the caller of the current function. |
| {name: "LoweredGetCallerSP", reg: gp01, rematerializeable: true}, |
| //arg0=ptr,arg1=mem, returns void. Faults if ptr is nil. |
| {name: "LoweredNilCheck", argLength: 2, reg: regInfo{inputs: []regMask{gpsp}}, clobberFlags: true, nilCheck: true, faultOnNilArg0: true}, |
| |
| // LoweredWB invokes runtime.gcWriteBarrier. arg0=destptr, arg1=srcptr, arg2=mem, aux=runtime.gcWriteBarrier |
| // It saves all GP registers if necessary, but may clobber others. |
| {name: "LoweredWB", argLength: 3, reg: regInfo{inputs: []regMask{buildReg("DI"), ax}, clobbers: callerSave &^ gp}, clobberFlags: true, aux: "Sym", symEffect: "None"}, |
| |
| // Constant flag values. For any comparison, there are 5 possible |
| // outcomes: the three from the signed total order (<,==,>) and the |
| // three from the unsigned total order. The == cases overlap. |
| // Note: there's a sixth "unordered" outcome for floating-point |
| // comparisons, but we don't use such a beast yet. |
| // These ops are for temporary use by rewrite rules. They |
| // cannot appear in the generated assembly. |
| {name: "FlagEQ"}, // equal |
| {name: "FlagLT_ULT"}, // signed < and unsigned < |
| {name: "FlagLT_UGT"}, // signed < and unsigned > |
| {name: "FlagGT_UGT"}, // signed > and unsigned < |
| {name: "FlagGT_ULT"}, // signed > and unsigned > |
| |
| // Special op for -x on 387 |
| {name: "FCHS", argLength: 1, reg: fp11}, |
| |
| // Special ops for PIC floating-point constants. |
| // MOVSXconst1 loads the address of the constant-pool entry into a register. |
| // MOVSXconst2 loads the constant from that address. |
| // MOVSXconst1 returns a pointer, but we type it as uint32 because it can never point to the Go heap. |
| {name: "MOVSSconst1", reg: gp01, typ: "UInt32", aux: "Float32"}, |
| {name: "MOVSDconst1", reg: gp01, typ: "UInt32", aux: "Float64"}, |
| {name: "MOVSSconst2", argLength: 1, reg: gpfp, asm: "MOVSS"}, |
| {name: "MOVSDconst2", argLength: 1, reg: gpfp, asm: "MOVSD"}, |
| } |
| |
| var _386blocks = []blockData{ |
| {name: "EQ"}, |
| {name: "NE"}, |
| {name: "LT"}, |
| {name: "LE"}, |
| {name: "GT"}, |
| {name: "GE"}, |
| {name: "ULT"}, |
| {name: "ULE"}, |
| {name: "UGT"}, |
| {name: "UGE"}, |
| {name: "EQF"}, |
| {name: "NEF"}, |
| {name: "ORD"}, // FP, ordered comparison (parity zero) |
| {name: "NAN"}, // FP, unordered comparison (parity one) |
| } |
| |
| archs = append(archs, arch{ |
| name: "386", |
| pkg: "cmd/internal/obj/x86", |
| genfile: "../../x86/ssa.go", |
| ops: _386ops, |
| blocks: _386blocks, |
| regnames: regNames386, |
| gpregmask: gp, |
| fpregmask: fp, |
| framepointerreg: int8(num["BP"]), |
| linkreg: -1, // not used |
| }) |
| } |
