| // 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. |
| // - Unused portions of AuxInt are filled by sign-extending the used portion. |
| // - *const instructions may use a constant larger than the instruction can encode. |
| // In this case the assembler expands to multiple instructions and uses tmp |
| // register (R23). |
| |
| // Suffixes encode the bit width of various instructions. |
| // W (word) = 32 bit |
| // H (half word) = 16 bit |
| // HU = 16 bit unsigned |
| // B (byte) = 8 bit |
| // BU = 8 bit unsigned |
| // F (float) = 32 bit float |
| // D (double) = 64 bit float |
| |
| // Note: registers not used in regalloc are not included in this list, |
| // so that regmask stays within int64 |
| // Be careful when hand coding regmasks. |
| var regNamesMIPS = []string{ |
| "R0", // constant 0 |
| "R1", |
| "R2", |
| "R3", |
| "R4", |
| "R5", |
| "R6", |
| "R7", |
| "R8", |
| "R9", |
| "R10", |
| "R11", |
| "R12", |
| "R13", |
| "R14", |
| "R15", |
| "R16", |
| "R17", |
| "R18", |
| "R19", |
| "R20", |
| "R21", |
| "R22", |
| //REGTMP |
| "R24", |
| "R25", |
| // R26 reserved by kernel |
| // R27 reserved by kernel |
| "R28", |
| "SP", // aka R29 |
| "g", // aka R30 |
| "R31", // REGLINK |
| |
| // odd FP registers contain high parts of 64-bit FP values |
| "F0", |
| "F2", |
| "F4", |
| "F6", |
| "F8", |
| "F10", |
| "F12", |
| "F14", |
| "F16", |
| "F18", |
| "F20", |
| "F22", |
| "F24", |
| "F26", |
| "F28", |
| "F30", |
| |
| "HI", // high bits of multiplication |
| "LO", // low bits of multiplication |
| |
| // If you add registers, update asyncPreempt in runtime. |
| |
| // pseudo-registers |
| "SB", |
| } |
| |
| func init() { |
| // Make map from reg names to reg integers. |
| if len(regNamesMIPS) > 64 { |
| panic("too many registers") |
| } |
| num := map[string]int{} |
| for i, name := range regNamesMIPS { |
| 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 ( |
| gp = buildReg("R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 R16 R17 R18 R19 R20 R21 R22 R24 R25 R28 R31") |
| gpg = gp | buildReg("g") |
| gpsp = gp | buildReg("SP") |
| gpspg = gpg | buildReg("SP") |
| gpspsbg = gpspg | buildReg("SB") |
| fp = buildReg("F0 F2 F4 F6 F8 F10 F12 F14 F16 F18 F20 F22 F24 F26 F28 F30") |
| lo = buildReg("LO") |
| hi = buildReg("HI") |
| callerSave = gp | fp | lo | hi | buildReg("g") // runtime.setg (and anything calling it) may clobber g |
| r1 = buildReg("R1") |
| r2 = buildReg("R2") |
| r3 = buildReg("R3") |
| r4 = buildReg("R4") |
| r5 = buildReg("R5") |
| ) |
| // Common regInfo |
| var ( |
| gp01 = regInfo{inputs: nil, outputs: []regMask{gp}} |
| gp11 = regInfo{inputs: []regMask{gpg}, outputs: []regMask{gp}} |
| gp11sp = regInfo{inputs: []regMask{gpspg}, outputs: []regMask{gp}} |
| gp21 = regInfo{inputs: []regMask{gpg, gpg}, outputs: []regMask{gp}} |
| gp31 = regInfo{inputs: []regMask{gp, gp, gp}, outputs: []regMask{gp}} |
| gp2hilo = regInfo{inputs: []regMask{gpg, gpg}, outputs: []regMask{hi, lo}} |
| gpload = regInfo{inputs: []regMask{gpspsbg}, outputs: []regMask{gp}} |
| gpstore = regInfo{inputs: []regMask{gpspsbg, gpg}} |
| gpxchg = regInfo{inputs: []regMask{gpspsbg, gpg}, outputs: []regMask{gp}} |
| gpcas = regInfo{inputs: []regMask{gpspsbg, gpg, gpg}, outputs: []regMask{gp}} |
| gpstore0 = regInfo{inputs: []regMask{gpspsbg}} |
| fp01 = regInfo{inputs: nil, outputs: []regMask{fp}} |
| fp11 = regInfo{inputs: []regMask{fp}, outputs: []regMask{fp}} |
| fp21 = regInfo{inputs: []regMask{fp, fp}, outputs: []regMask{fp}} |
| fp2flags = regInfo{inputs: []regMask{fp, fp}} |
| fpload = regInfo{inputs: []regMask{gpspsbg}, outputs: []regMask{fp}} |
| fpstore = regInfo{inputs: []regMask{gpspsbg, fp}} |
| readflags = regInfo{inputs: nil, outputs: []regMask{gp}} |
| ) |
| ops := []opData{ |
| {name: "ADD", argLength: 2, reg: gp21, asm: "ADDU", commutative: true}, // arg0 + arg1 |
| {name: "ADDconst", argLength: 1, reg: gp11sp, asm: "ADDU", aux: "Int32"}, // arg0 + auxInt |
| {name: "SUB", argLength: 2, reg: gp21, asm: "SUBU"}, // arg0 - arg1 |
| {name: "SUBconst", argLength: 1, reg: gp11, asm: "SUBU", aux: "Int32"}, // arg0 - auxInt |
| {name: "MUL", argLength: 2, reg: regInfo{inputs: []regMask{gpg, gpg}, outputs: []regMask{gp}, clobbers: hi | lo}, asm: "MUL", commutative: true}, // arg0 * arg1 |
| {name: "MULT", argLength: 2, reg: gp2hilo, asm: "MUL", commutative: true, typ: "(Int32,Int32)"}, // arg0 * arg1, signed, results hi,lo |
| {name: "MULTU", argLength: 2, reg: gp2hilo, asm: "MULU", commutative: true, typ: "(UInt32,UInt32)"}, // arg0 * arg1, unsigned, results hi,lo |
| {name: "DIV", argLength: 2, reg: gp2hilo, asm: "DIV", typ: "(Int32,Int32)"}, // arg0 / arg1, signed, results hi=arg0%arg1,lo=arg0/arg1 |
| {name: "DIVU", argLength: 2, reg: gp2hilo, asm: "DIVU", typ: "(UInt32,UInt32)"}, // arg0 / arg1, signed, results hi=arg0%arg1,lo=arg0/arg1 |
| |
| {name: "ADDF", argLength: 2, reg: fp21, asm: "ADDF", commutative: true}, // arg0 + arg1 |
| {name: "ADDD", argLength: 2, reg: fp21, asm: "ADDD", commutative: true}, // arg0 + arg1 |
| {name: "SUBF", argLength: 2, reg: fp21, asm: "SUBF"}, // arg0 - arg1 |
| {name: "SUBD", argLength: 2, reg: fp21, asm: "SUBD"}, // arg0 - arg1 |
| {name: "MULF", argLength: 2, reg: fp21, asm: "MULF", commutative: true}, // arg0 * arg1 |
| {name: "MULD", argLength: 2, reg: fp21, asm: "MULD", commutative: true}, // arg0 * arg1 |
| {name: "DIVF", argLength: 2, reg: fp21, asm: "DIVF"}, // arg0 / arg1 |
| {name: "DIVD", argLength: 2, reg: fp21, asm: "DIVD"}, // arg0 / arg1 |
| |
| {name: "AND", argLength: 2, reg: gp21, asm: "AND", commutative: true}, // arg0 & arg1 |
| {name: "ANDconst", argLength: 1, reg: gp11, asm: "AND", aux: "Int32"}, // arg0 & auxInt |
| {name: "OR", argLength: 2, reg: gp21, asm: "OR", commutative: true}, // arg0 | arg1 |
| {name: "ORconst", argLength: 1, reg: gp11, asm: "OR", aux: "Int32"}, // arg0 | auxInt |
| {name: "XOR", argLength: 2, reg: gp21, asm: "XOR", commutative: true, typ: "UInt32"}, // arg0 ^ arg1 |
| {name: "XORconst", argLength: 1, reg: gp11, asm: "XOR", aux: "Int32", typ: "UInt32"}, // arg0 ^ auxInt |
| {name: "NOR", argLength: 2, reg: gp21, asm: "NOR", commutative: true}, // ^(arg0 | arg1) |
| {name: "NORconst", argLength: 1, reg: gp11, asm: "NOR", aux: "Int32"}, // ^(arg0 | auxInt) |
| |
| {name: "NEG", argLength: 1, reg: gp11}, // -arg0 |
| {name: "NEGF", argLength: 1, reg: fp11, asm: "NEGF"}, // -arg0, float32 |
| {name: "NEGD", argLength: 1, reg: fp11, asm: "NEGD"}, // -arg0, float64 |
| {name: "SQRTD", argLength: 1, reg: fp11, asm: "SQRTD"}, // sqrt(arg0), float64 |
| {name: "SQRTF", argLength: 1, reg: fp11, asm: "SQRTF"}, // sqrt(arg0), float32 |
| |
| // shifts |
| {name: "SLL", argLength: 2, reg: gp21, asm: "SLL"}, // arg0 << arg1, shift amount is mod 32 |
| {name: "SLLconst", argLength: 1, reg: gp11, asm: "SLL", aux: "Int32"}, // arg0 << auxInt, shift amount must be 0 through 31 inclusive |
| {name: "SRL", argLength: 2, reg: gp21, asm: "SRL"}, // arg0 >> arg1, unsigned, shift amount is mod 32 |
| {name: "SRLconst", argLength: 1, reg: gp11, asm: "SRL", aux: "Int32"}, // arg0 >> auxInt, shift amount must be 0 through 31 inclusive |
| {name: "SRA", argLength: 2, reg: gp21, asm: "SRA"}, // arg0 >> arg1, signed, shift amount is mod 32 |
| {name: "SRAconst", argLength: 1, reg: gp11, asm: "SRA", aux: "Int32"}, // arg0 >> auxInt, signed, shift amount must be 0 through 31 inclusive |
| |
| {name: "CLZ", argLength: 1, reg: gp11, asm: "CLZ"}, |
| |
| // comparisons |
| {name: "SGT", argLength: 2, reg: gp21, asm: "SGT", typ: "Bool"}, // 1 if arg0 > arg1 (signed), 0 otherwise |
| {name: "SGTconst", argLength: 1, reg: gp11, asm: "SGT", aux: "Int32", typ: "Bool"}, // 1 if auxInt > arg0 (signed), 0 otherwise |
| {name: "SGTzero", argLength: 1, reg: gp11, asm: "SGT", typ: "Bool"}, // 1 if arg0 > 0 (signed), 0 otherwise |
| {name: "SGTU", argLength: 2, reg: gp21, asm: "SGTU", typ: "Bool"}, // 1 if arg0 > arg1 (unsigned), 0 otherwise |
| {name: "SGTUconst", argLength: 1, reg: gp11, asm: "SGTU", aux: "Int32", typ: "Bool"}, // 1 if auxInt > arg0 (unsigned), 0 otherwise |
| {name: "SGTUzero", argLength: 1, reg: gp11, asm: "SGTU", typ: "Bool"}, // 1 if arg0 > 0 (unsigned), 0 otherwise |
| |
| {name: "CMPEQF", argLength: 2, reg: fp2flags, asm: "CMPEQF", typ: "Flags"}, // flags=true if arg0 = arg1, float32 |
| {name: "CMPEQD", argLength: 2, reg: fp2flags, asm: "CMPEQD", typ: "Flags"}, // flags=true if arg0 = arg1, float64 |
| {name: "CMPGEF", argLength: 2, reg: fp2flags, asm: "CMPGEF", typ: "Flags"}, // flags=true if arg0 >= arg1, float32 |
| {name: "CMPGED", argLength: 2, reg: fp2flags, asm: "CMPGED", typ: "Flags"}, // flags=true if arg0 >= arg1, float64 |
| {name: "CMPGTF", argLength: 2, reg: fp2flags, asm: "CMPGTF", typ: "Flags"}, // flags=true if arg0 > arg1, float32 |
| {name: "CMPGTD", argLength: 2, reg: fp2flags, asm: "CMPGTD", typ: "Flags"}, // flags=true if arg0 > arg1, float64 |
| |
| // moves |
| {name: "MOVWconst", argLength: 0, reg: gp01, aux: "Int32", asm: "MOVW", typ: "UInt32", rematerializeable: true}, // auxint |
| {name: "MOVFconst", argLength: 0, reg: fp01, aux: "Float32", asm: "MOVF", typ: "Float32", rematerializeable: true}, // auxint as 64-bit float, convert to 32-bit float |
| {name: "MOVDconst", argLength: 0, reg: fp01, aux: "Float64", asm: "MOVD", typ: "Float64", rematerializeable: true}, // auxint as 64-bit float |
| |
| {name: "MOVWaddr", argLength: 1, reg: regInfo{inputs: []regMask{buildReg("SP") | buildReg("SB")}, outputs: []regMask{gp}}, aux: "SymOff", asm: "MOVW", rematerializeable: true, symEffect: "Addr"}, // arg0 + auxInt + aux.(*gc.Sym), arg0=SP/SB |
| |
| {name: "MOVBload", argLength: 2, reg: gpload, aux: "SymOff", asm: "MOVB", typ: "Int8", faultOnNilArg0: true, symEffect: "Read"}, // load from arg0 + auxInt + aux. arg1=mem. |
| {name: "MOVBUload", argLength: 2, reg: gpload, aux: "SymOff", asm: "MOVBU", typ: "UInt8", faultOnNilArg0: true, symEffect: "Read"}, // load from arg0 + auxInt + aux. arg1=mem. |
| {name: "MOVHload", argLength: 2, reg: gpload, aux: "SymOff", asm: "MOVH", typ: "Int16", faultOnNilArg0: true, symEffect: "Read"}, // load from arg0 + auxInt + aux. arg1=mem. |
| {name: "MOVHUload", argLength: 2, reg: gpload, aux: "SymOff", asm: "MOVHU", typ: "UInt16", faultOnNilArg0: true, symEffect: "Read"}, // load from arg0 + auxInt + aux. arg1=mem. |
| {name: "MOVWload", argLength: 2, reg: gpload, aux: "SymOff", asm: "MOVW", typ: "UInt32", faultOnNilArg0: true, symEffect: "Read"}, // load from arg0 + auxInt + aux. arg1=mem. |
| {name: "MOVFload", argLength: 2, reg: fpload, aux: "SymOff", asm: "MOVF", typ: "Float32", faultOnNilArg0: true, symEffect: "Read"}, // load from arg0 + auxInt + aux. arg1=mem. |
| {name: "MOVDload", argLength: 2, reg: fpload, aux: "SymOff", asm: "MOVD", typ: "Float64", faultOnNilArg0: true, symEffect: "Read"}, // load from arg0 + auxInt + aux. arg1=mem. |
| |
| {name: "MOVBstore", argLength: 3, reg: gpstore, aux: "SymOff", asm: "MOVB", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // store 1 byte of arg1 to arg0 + auxInt + aux. arg2=mem. |
| {name: "MOVHstore", argLength: 3, reg: gpstore, aux: "SymOff", asm: "MOVH", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // store 2 bytes of arg1 to arg0 + auxInt + aux. arg2=mem. |
| {name: "MOVWstore", argLength: 3, reg: gpstore, aux: "SymOff", asm: "MOVW", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // store 4 bytes of arg1 to arg0 + auxInt + aux. arg2=mem. |
| {name: "MOVFstore", argLength: 3, reg: fpstore, aux: "SymOff", asm: "MOVF", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // store 4 bytes of arg1 to arg0 + auxInt + aux. arg2=mem. |
| {name: "MOVDstore", argLength: 3, reg: fpstore, aux: "SymOff", asm: "MOVD", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // store 8 bytes of arg1 to arg0 + auxInt + aux. arg2=mem. |
| |
| {name: "MOVBstorezero", argLength: 2, reg: gpstore0, aux: "SymOff", asm: "MOVB", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // store 1 byte of zero to arg0 + auxInt + aux. arg1=mem. |
| {name: "MOVHstorezero", argLength: 2, reg: gpstore0, aux: "SymOff", asm: "MOVH", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // store 2 bytes of zero to arg0 + auxInt + aux. arg1=mem. |
| {name: "MOVWstorezero", argLength: 2, reg: gpstore0, aux: "SymOff", asm: "MOVW", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // store 4 bytes of zero to arg0 + auxInt + aux. arg1=mem. |
| |
| // conversions |
| {name: "MOVBreg", argLength: 1, reg: gp11, asm: "MOVB"}, // move from arg0, sign-extended from byte |
| {name: "MOVBUreg", argLength: 1, reg: gp11, asm: "MOVBU"}, // move from arg0, unsign-extended from byte |
| {name: "MOVHreg", argLength: 1, reg: gp11, asm: "MOVH"}, // move from arg0, sign-extended from half |
| {name: "MOVHUreg", argLength: 1, reg: gp11, asm: "MOVHU"}, // move from arg0, unsign-extended from half |
| {name: "MOVWreg", argLength: 1, reg: gp11, asm: "MOVW"}, // move from arg0 |
| |
| {name: "MOVWnop", argLength: 1, reg: regInfo{inputs: []regMask{gp}, outputs: []regMask{gp}}, resultInArg0: true}, // nop, return arg0 in same register |
| |
| // conditional move on zero (returns arg1 if arg2 is 0, otherwise arg0) |
| // order of parameters is reversed so we can use resultInArg0 (OpCMOVZ result arg1 arg2-> CMOVZ arg2reg, arg1reg, resultReg) |
| {name: "CMOVZ", argLength: 3, reg: gp31, asm: "CMOVZ", resultInArg0: true}, |
| {name: "CMOVZzero", argLength: 2, reg: regInfo{inputs: []regMask{gp, gpg}, outputs: []regMask{gp}}, asm: "CMOVZ", resultInArg0: true}, |
| |
| {name: "MOVWF", argLength: 1, reg: fp11, asm: "MOVWF"}, // int32 -> float32 |
| {name: "MOVWD", argLength: 1, reg: fp11, asm: "MOVWD"}, // int32 -> float64 |
| {name: "TRUNCFW", argLength: 1, reg: fp11, asm: "TRUNCFW"}, // float32 -> int32 |
| {name: "TRUNCDW", argLength: 1, reg: fp11, asm: "TRUNCDW"}, // float64 -> int32 |
| {name: "MOVFD", argLength: 1, reg: fp11, asm: "MOVFD"}, // float32 -> float64 |
| {name: "MOVDF", argLength: 1, reg: fp11, asm: "MOVDF"}, // float64 -> float32 |
| |
| // function calls |
| {name: "CALLstatic", argLength: 1, reg: regInfo{clobbers: callerSave}, aux: "CallOff", clobberFlags: true, call: true}, // call static function aux.(*obj.LSym). arg0=mem, auxint=argsize, returns mem |
| {name: "CALLclosure", argLength: 3, reg: regInfo{inputs: []regMask{gpsp, buildReg("R22"), 0}, clobbers: callerSave}, aux: "CallOff", 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: "CallOff", clobberFlags: true, call: true}, // call fn by pointer. arg0=codeptr, arg1=mem, auxint=argsize, returns mem |
| |
| // atomic ops |
| |
| // load from arg0. arg1=mem. |
| // returns <value,memory> so they can be properly ordered with other loads. |
| // SYNC |
| // MOV(B|W) (Rarg0), Rout |
| // SYNC |
| {name: "LoweredAtomicLoad8", argLength: 2, reg: gpload, faultOnNilArg0: true}, |
| {name: "LoweredAtomicLoad32", argLength: 2, reg: gpload, faultOnNilArg0: true}, |
| |
| // store arg1 to arg0. arg2=mem. returns memory. |
| // SYNC |
| // MOV(B|W) Rarg1, (Rarg0) |
| // SYNC |
| {name: "LoweredAtomicStore8", argLength: 3, reg: gpstore, faultOnNilArg0: true, hasSideEffects: true}, |
| {name: "LoweredAtomicStore32", argLength: 3, reg: gpstore, faultOnNilArg0: true, hasSideEffects: true}, |
| {name: "LoweredAtomicStorezero", argLength: 2, reg: gpstore0, faultOnNilArg0: true, hasSideEffects: true}, |
| |
| // atomic exchange. |
| // store arg1 to arg0. arg2=mem. returns <old content of *arg0, memory>. |
| // SYNC |
| // LL (Rarg0), Rout |
| // MOVW Rarg1, Rtmp |
| // SC Rtmp, (Rarg0) |
| // BEQ Rtmp, -3(PC) |
| // SYNC |
| {name: "LoweredAtomicExchange", argLength: 3, reg: gpxchg, resultNotInArgs: true, faultOnNilArg0: true, hasSideEffects: true, unsafePoint: true}, |
| |
| // atomic add. |
| // *arg0 += arg1. arg2=mem. returns <new content of *arg0, memory>. |
| // SYNC |
| // LL (Rarg0), Rout |
| // ADDU Rarg1, Rout, Rtmp |
| // SC Rtmp, (Rarg0) |
| // BEQ Rtmp, -3(PC) |
| // SYNC |
| // ADDU Rarg1, Rout |
| {name: "LoweredAtomicAdd", argLength: 3, reg: gpxchg, resultNotInArgs: true, faultOnNilArg0: true, hasSideEffects: true, unsafePoint: true}, |
| {name: "LoweredAtomicAddconst", argLength: 2, reg: regInfo{inputs: []regMask{gpspsbg}, outputs: []regMask{gp}}, aux: "Int32", resultNotInArgs: true, faultOnNilArg0: true, hasSideEffects: true, unsafePoint: true}, |
| |
| // atomic compare and swap. |
| // arg0 = pointer, arg1 = old value, arg2 = new value, arg3 = memory. |
| // if *arg0 == arg1 { |
| // *arg0 = arg2 |
| // return (true, memory) |
| // } else { |
| // return (false, memory) |
| // } |
| // SYNC |
| // MOVW $0, Rout |
| // LL (Rarg0), Rtmp |
| // BNE Rtmp, Rarg1, 4(PC) |
| // MOVW Rarg2, Rout |
| // SC Rout, (Rarg0) |
| // BEQ Rout, -4(PC) |
| // SYNC |
| {name: "LoweredAtomicCas", argLength: 4, reg: gpcas, resultNotInArgs: true, faultOnNilArg0: true, hasSideEffects: true, unsafePoint: true}, |
| |
| // atomic and/or. |
| // *arg0 &= (|=) arg1. arg2=mem. returns memory. |
| // SYNC |
| // LL (Rarg0), Rtmp |
| // AND Rarg1, Rtmp |
| // SC Rtmp, (Rarg0) |
| // BEQ Rtmp, -3(PC) |
| // SYNC |
| {name: "LoweredAtomicAnd", argLength: 3, reg: gpstore, asm: "AND", faultOnNilArg0: true, hasSideEffects: true, unsafePoint: true}, |
| {name: "LoweredAtomicOr", argLength: 3, reg: gpstore, asm: "OR", faultOnNilArg0: true, hasSideEffects: true, unsafePoint: true}, |
| |
| // large or unaligned zeroing |
| // arg0 = address of memory to zero (in R1, changed as side effect) |
| // arg1 = address of the last element to zero |
| // arg2 = mem |
| // auxint = alignment |
| // returns mem |
| // SUBU $4, R1 |
| // MOVW R0, 4(R1) |
| // ADDU $4, R1 |
| // BNE Rarg1, R1, -2(PC) |
| { |
| name: "LoweredZero", |
| aux: "Int32", |
| argLength: 3, |
| reg: regInfo{ |
| inputs: []regMask{buildReg("R1"), gp}, |
| clobbers: buildReg("R1"), |
| }, |
| faultOnNilArg0: true, |
| }, |
| |
| // large or unaligned move |
| // arg0 = address of dst memory (in R2, changed as side effect) |
| // arg1 = address of src memory (in R1, changed as side effect) |
| // arg2 = address of the last element of src |
| // arg3 = mem |
| // auxint = alignment |
| // returns mem |
| // SUBU $4, R1 |
| // MOVW 4(R1), Rtmp |
| // MOVW Rtmp, (R2) |
| // ADDU $4, R1 |
| // ADDU $4, R2 |
| // BNE Rarg2, R1, -4(PC) |
| { |
| name: "LoweredMove", |
| aux: "Int32", |
| argLength: 4, |
| reg: regInfo{ |
| inputs: []regMask{buildReg("R2"), buildReg("R1"), gp}, |
| clobbers: buildReg("R1 R2"), |
| }, |
| faultOnNilArg0: true, |
| faultOnNilArg1: true, |
| }, |
| |
| // pseudo-ops |
| {name: "LoweredNilCheck", argLength: 2, reg: regInfo{inputs: []regMask{gpg}}, nilCheck: true, faultOnNilArg0: true}, // panic if arg0 is nil. arg1=mem. |
| |
| {name: "FPFlagTrue", argLength: 1, reg: readflags}, // bool, true if FP flag is true |
| {name: "FPFlagFalse", argLength: 1, reg: readflags}, // bool, true if FP flag is false |
| |
| // Scheduler ensures LoweredGetClosurePtr occurs only in entry block, |
| // and sorts it to the very beginning of the block to prevent other |
| // use of R22 (mips.REGCTXT, the closure pointer) |
| {name: "LoweredGetClosurePtr", reg: regInfo{outputs: []regMask{buildReg("R22")}}, zeroWidth: true}, |
| |
| // LoweredGetCallerSP returns the SP of the caller of the current function. |
| {name: "LoweredGetCallerSP", reg: gp01, rematerializeable: 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}, |
| |
| // LoweredWB invokes runtime.gcWriteBarrier. arg0=destptr, arg1=srcptr, arg2=mem, aux=runtime.gcWriteBarrier |
| // It saves all GP registers if necessary, |
| // but clobbers R31 (LR) because it's a call |
| // and R23 (REGTMP). |
| {name: "LoweredWB", argLength: 3, reg: regInfo{inputs: []regMask{buildReg("R20"), buildReg("R21")}, clobbers: (callerSave &^ gpg) | buildReg("R31")}, clobberFlags: true, aux: "Sym", symEffect: "None"}, |
| |
| // There are three of these functions so that they can have three different register inputs. |
| // When we check 0 <= c <= cap (A), then 0 <= b <= c (B), then 0 <= a <= b (C), we want the |
| // default registers to match so we don't need to copy registers around unnecessarily. |
| {name: "LoweredPanicBoundsA", argLength: 3, aux: "Int64", reg: regInfo{inputs: []regMask{r3, r4}}, typ: "Mem", call: true}, // arg0=idx, arg1=len, arg2=mem, returns memory. AuxInt contains report code (see PanicBounds in genericOps.go). |
| {name: "LoweredPanicBoundsB", argLength: 3, aux: "Int64", reg: regInfo{inputs: []regMask{r2, r3}}, typ: "Mem", call: true}, // arg0=idx, arg1=len, arg2=mem, returns memory. AuxInt contains report code (see PanicBounds in genericOps.go). |
| {name: "LoweredPanicBoundsC", argLength: 3, aux: "Int64", reg: regInfo{inputs: []regMask{r1, r2}}, typ: "Mem", call: true}, // arg0=idx, arg1=len, arg2=mem, returns memory. AuxInt contains report code (see PanicBounds in genericOps.go). |
| // Extend ops are the same as Bounds ops except the indexes are 64-bit. |
| {name: "LoweredPanicExtendA", argLength: 4, aux: "Int64", reg: regInfo{inputs: []regMask{r5, r3, r4}}, typ: "Mem", call: true}, // arg0=idxHi, arg1=idxLo, arg2=len, arg3=mem, returns memory. AuxInt contains report code (see PanicExtend in genericOps.go). |
| {name: "LoweredPanicExtendB", argLength: 4, aux: "Int64", reg: regInfo{inputs: []regMask{r5, r2, r3}}, typ: "Mem", call: true}, // arg0=idxHi, arg1=idxLo, arg2=len, arg3=mem, returns memory. AuxInt contains report code (see PanicExtend in genericOps.go). |
| {name: "LoweredPanicExtendC", argLength: 4, aux: "Int64", reg: regInfo{inputs: []regMask{r5, r1, r2}}, typ: "Mem", call: true}, // arg0=idxHi, arg1=idxLo, arg2=len, arg3=mem, returns memory. AuxInt contains report code (see PanicExtend in genericOps.go). |
| } |
| |
| blocks := []blockData{ |
| {name: "EQ", controls: 1}, |
| {name: "NE", controls: 1}, |
| {name: "LTZ", controls: 1}, // < 0 |
| {name: "LEZ", controls: 1}, // <= 0 |
| {name: "GTZ", controls: 1}, // > 0 |
| {name: "GEZ", controls: 1}, // >= 0 |
| {name: "FPT", controls: 1}, // FP flag is true |
| {name: "FPF", controls: 1}, // FP flag is false |
| } |
| |
| archs = append(archs, arch{ |
| name: "MIPS", |
| pkg: "cmd/internal/obj/mips", |
| genfile: "../../mips/ssa.go", |
| ops: ops, |
| blocks: blocks, |
| regnames: regNamesMIPS, |
| gpregmask: gp, |
| fpregmask: fp, |
| specialregmask: hi | lo, |
| framepointerreg: -1, // not used |
| linkreg: int8(num["R31"]), |
| }) |
| } |
