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go/src/cmd/compile/internal/ssa/gen/MIPSOps.go

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cmd/compile/internal/ssa: add support for GOARCH=mips{,le} Change-Id: I632d4aef7295778ba5018d98bcb06a68bcf07ce1 Reviewed-on: https://go-review.googlesource.com/31478 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com>
2016-10-18 23:50:42 +02:00
// 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.
all: fix misspellings Change-Id: I429637ca91f7db4144f17621de851a548dc1ce76 Reviewed-on: https://go-review.googlesource.com/34923 Reviewed-by: Ian Lance Taylor <iant@golang.org> Reviewed-by: Daniel Martí <mvdan@mvdan.cc> Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
2017-01-07 08:23:11 -08:00
// - *const instructions may use a constant larger than the instruction can encode.
cmd/compile/internal/ssa: add support for GOARCH=mips{,le} Change-Id: I632d4aef7295778ba5018d98bcb06a68bcf07ce1 Reviewed-on: https://go-review.googlesource.com/31478 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com>
2016-10-18 23:50:42 +02:00
// 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
// 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
)
// 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
// 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
{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, unsigned
{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
{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
cmd/compile/internal/ssa: populate SymEffects for SSA Ops Changes to ${GOARCH}Ops.go files were mechanically produced using github.com/mdempsky/ssa-symops, a one-off tool that inserts "SymEffect: X" elements by pattern matching against the Op names. Change-Id: Ibf3e481ffd588647f2a31662d72114b740ccbfcf Reviewed-on: https://go-review.googlesource.com/38084 Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Keith Randall <khr@golang.org>
2017-03-09 14:46:43 -08:00
{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.
cmd/compile/internal/ssa: add support for GOARCH=mips{,le} Change-Id: I632d4aef7295778ba5018d98bcb06a68bcf07ce1 Reviewed-on: https://go-review.googlesource.com/31478 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com>
2016-10-18 23:50:42 +02:00
// 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
cmd/compile: experiment which clobbers all dead pointer fields The experiment "clobberdead" clobbers all pointer fields that the compiler thinks are dead, just before and after every safepoint. Useful for debugging the generation of live pointer bitmaps. Helped find the following issues: Update #15936 Update #16026 Update #16095 Update #18860 Change-Id: Id1d12f86845e3d93bae903d968b1eac61fc461f9 Reviewed-on: https://go-review.googlesource.com/23924 Run-TryBot: Keith Randall <khr@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com> Reviewed-by: Cherry Zhang <cherryyz@google.com>
2016-06-08 22:02:08 -07:00
{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
cmd/compile/internal/ssa: replace {Defer,Go}Call with StaticCall Passes toolstash-check -all. Change-Id: Icf8b75364e4761a5e56567f503b2c1cb17382ed2 Reviewed-on: https://go-review.googlesource.com/38080 Run-TryBot: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Keith Randall <khr@golang.org>
2017-03-10 17:42:02 -08:00
{name: "CALLclosure", argLength: 3, reg: regInfo{inputs: []regMask{gpsp, buildReg("R22"), 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
cmd/compile/internal/ssa: add support for GOARCH=mips{,le} Change-Id: I632d4aef7295778ba5018d98bcb06a68bcf07ce1 Reviewed-on: https://go-review.googlesource.com/31478 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com>
2016-10-18 23:50:42 +02:00
// atomic ops
// load from arg0. arg1=mem.
// returns <value,memory> so they can be properly ordered with other loads.
// SYNC
// MOVW (Rarg0), Rout
// SYNC
{name: "LoweredAtomicLoad", argLength: 2, reg: gpload, faultOnNilArg0: true},
// store arg1 to arg0. arg2=mem. returns memory.
// SYNC
// MOVW Rarg1, (Rarg0)
// SYNC
cmd/compile: add opcode flag hasSideEffects for do-not-remove Added a flag to generic and various architectures' atomic operations that are judged to have observable side effects and thus cannot be dead-code-eliminated. Test requires GOMAXPROCS > 1 without preemption in loop. Fixes #19182. Change-Id: Id2230031abd2cca0bbb32fd68fc8a58fb912070f Reviewed-on: https://go-review.googlesource.com/37333 Run-TryBot: David Chase <drchase@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com>
2017-02-21 15:22:52 -05:00
{name: "LoweredAtomicStore", argLength: 3, reg: gpstore, faultOnNilArg0: true, hasSideEffects: true},
{name: "LoweredAtomicStorezero", argLength: 2, reg: gpstore0, faultOnNilArg0: true, hasSideEffects: true},
cmd/compile/internal/ssa: add support for GOARCH=mips{,le} Change-Id: I632d4aef7295778ba5018d98bcb06a68bcf07ce1 Reviewed-on: https://go-review.googlesource.com/31478 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com>
2016-10-18 23:50:42 +02:00
// 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
cmd/compile: add opcode flag hasSideEffects for do-not-remove Added a flag to generic and various architectures' atomic operations that are judged to have observable side effects and thus cannot be dead-code-eliminated. Test requires GOMAXPROCS > 1 without preemption in loop. Fixes #19182. Change-Id: Id2230031abd2cca0bbb32fd68fc8a58fb912070f Reviewed-on: https://go-review.googlesource.com/37333 Run-TryBot: David Chase <drchase@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com>
2017-02-21 15:22:52 -05:00
{name: "LoweredAtomicExchange", argLength: 3, reg: gpxchg, resultNotInArgs: true, faultOnNilArg0: true, hasSideEffects: true},
cmd/compile/internal/ssa: add support for GOARCH=mips{,le} Change-Id: I632d4aef7295778ba5018d98bcb06a68bcf07ce1 Reviewed-on: https://go-review.googlesource.com/31478 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com>
2016-10-18 23:50:42 +02:00
// 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
cmd/compile: add opcode flag hasSideEffects for do-not-remove Added a flag to generic and various architectures' atomic operations that are judged to have observable side effects and thus cannot be dead-code-eliminated. Test requires GOMAXPROCS > 1 without preemption in loop. Fixes #19182. Change-Id: Id2230031abd2cca0bbb32fd68fc8a58fb912070f Reviewed-on: https://go-review.googlesource.com/37333 Run-TryBot: David Chase <drchase@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com>
2017-02-21 15:22:52 -05:00
{name: "LoweredAtomicAdd", argLength: 3, reg: gpxchg, resultNotInArgs: true, faultOnNilArg0: true, hasSideEffects: true},
{name: "LoweredAtomicAddconst", argLength: 2, reg: regInfo{inputs: []regMask{gpspsbg}, outputs: []regMask{gp}}, aux: "Int32", resultNotInArgs: true, faultOnNilArg0: true, hasSideEffects: true},
cmd/compile/internal/ssa: add support for GOARCH=mips{,le} Change-Id: I632d4aef7295778ba5018d98bcb06a68bcf07ce1 Reviewed-on: https://go-review.googlesource.com/31478 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com>
2016-10-18 23:50:42 +02:00
// 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
cmd/compile: add opcode flag hasSideEffects for do-not-remove Added a flag to generic and various architectures' atomic operations that are judged to have observable side effects and thus cannot be dead-code-eliminated. Test requires GOMAXPROCS > 1 without preemption in loop. Fixes #19182. Change-Id: Id2230031abd2cca0bbb32fd68fc8a58fb912070f Reviewed-on: https://go-review.googlesource.com/37333 Run-TryBot: David Chase <drchase@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com>
2017-02-21 15:22:52 -05:00
{name: "LoweredAtomicCas", argLength: 4, reg: gpcas, resultNotInArgs: true, faultOnNilArg0: true, hasSideEffects: true},
cmd/compile/internal/ssa: add support for GOARCH=mips{,le} Change-Id: I632d4aef7295778ba5018d98bcb06a68bcf07ce1 Reviewed-on: https://go-review.googlesource.com/31478 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com>
2016-10-18 23:50:42 +02:00
// atomic and/or.
// *arg0 &= (|=) arg1. arg2=mem. returns memory.
// SYNC
// LL (Rarg0), Rtmp
// AND Rarg1, Rtmp
// SC Rtmp, (Rarg0)
// BEQ Rtmp, -3(PC)
// SYNC
cmd/compile: add opcode flag hasSideEffects for do-not-remove Added a flag to generic and various architectures' atomic operations that are judged to have observable side effects and thus cannot be dead-code-eliminated. Test requires GOMAXPROCS > 1 without preemption in loop. Fixes #19182. Change-Id: Id2230031abd2cca0bbb32fd68fc8a58fb912070f Reviewed-on: https://go-review.googlesource.com/37333 Run-TryBot: David Chase <drchase@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com>
2017-02-21 15:22:52 -05:00
{name: "LoweredAtomicAnd", argLength: 3, reg: gpstore, asm: "AND", faultOnNilArg0: true, hasSideEffects: true},
{name: "LoweredAtomicOr", argLength: 3, reg: gpstore, asm: "OR", faultOnNilArg0: true, hasSideEffects: true},
cmd/compile/internal/ssa: add support for GOARCH=mips{,le} Change-Id: I632d4aef7295778ba5018d98bcb06a68bcf07ce1 Reviewed-on: https://go-review.googlesource.com/31478 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com>
2016-10-18 23:50:42 +02:00
// 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")}}},
// MOVWconvert converts between pointers and integers.
// We have a special op for this so as to not confuse GC
// (particularly stack maps). It takes a memory arg so it
// gets correctly ordered with respect to GC safepoints.
// arg0=ptr/int arg1=mem, output=int/ptr
{name: "MOVWconvert", argLength: 2, reg: gp11, asm: "MOVW"},
}
blocks := []blockData{
{name: "EQ"},
{name: "NE"},
{name: "LTZ"}, // < 0
{name: "LEZ"}, // <= 0
{name: "GTZ"}, // > 0
{name: "GEZ"}, // >= 0
{name: "FPT"}, // FP flag is true
{name: "FPF"}, // 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"]),
})
}
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