Golang程序
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// 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.
// - 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.
// - The SB 'register' is implemented using instruction-relative addressing. This
// places some limitations on when and how memory operands that are addressed
// relative to SB can be used:
//
// 1. Pseudo-instructions do not always map to a single machine instruction when
// using the SB 'register' to address data. This is because many machine
// instructions do not have relative long (RL suffix) equivalents. For example,
// ADDload, which is assembled as AG.
//
// 2. Loads and stores using relative addressing require the data be aligned
// according to its size (8-bytes for double words, 4-bytes for words
// and so on).
//
// We can always work around these by inserting LARL instructions (load address
// relative long) in the assembler, but typically this results in worse code
// generation because the address can't be re-used. Inserting instructions in the
// assembler also means clobbering the temp register and it is a long-term goal
// to prevent the compiler doing this so that it can be allocated as a normal
// register.
//
// For more information about the z/Architecture, the instruction set and the
// addressing modes it supports take a look at the z/Architecture Principles of
// Operation: http://publibfp.boulder.ibm.com/epubs/pdf/dz9zr010.pdf
//
// Suffixes encode the bit width of pseudo-instructions.
// D (double word) = 64 bit (frequently omitted)
// W (word) = 32 bit
// H (half word) = 16 bit
// B (byte) = 8 bit
// S (single prec.) = 32 bit (double precision is omitted)
// copied from ../../s390x/reg.go
var regNamesS390X = []string{
"R0",
"R1",
"R2",
"R3",
"R4",
"R5",
"R6",
"R7",
"R8",
"R9",
"R10",
"R11",
"R12",
"g", // R13
"R14",
"SP", // R15
"F0",
"F1",
"F2",
"F3",
"F4",
"F5",
"F6",
"F7",
"F8",
"F9",
"F10",
"F11",
"F12",
"F13",
"F14",
"F15",
//pseudo-registers
"SB",
}
func init() {
// Make map from reg names to reg integers.
if len(regNamesS390X) > 64 {
panic("too many registers")
}
num := map[string]int{}
for i, name := range regNamesS390X {
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 (
sp = buildReg("SP")
sb = buildReg("SB")
r0 = buildReg("R0")
// R10 and R11 are reserved by the assembler.
gp = buildReg("R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 R12 R14")
gpsp = gp | sp
// R0 is considered to contain the value 0 in address calculations.
ptr = gp &^ r0
ptrsp = ptr | sp
ptrspsb = ptrsp | sb
fp = buildReg("F0 F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 F12 F13 F14 F15")
callerSave = gp | fp
)
// Common slices of register masks
var (
gponly = []regMask{gp}
fponly = []regMask{fp}
)
// Common regInfo
var (
gp01 = regInfo{inputs: []regMask{}, outputs: gponly}
gp11 = regInfo{inputs: []regMask{gp}, outputs: gponly}
gp11sp = regInfo{inputs: []regMask{gpsp}, outputs: gponly}
gp21 = regInfo{inputs: []regMask{gp, gp}, outputs: gponly}
gp21sp = regInfo{inputs: []regMask{gpsp, gp}, outputs: gponly}
// R0 evaluates to 0 when used as the number of bits to shift
// so we need to exclude it from that operand.
sh21 = regInfo{inputs: []regMask{gp, ptr}, outputs: gponly}
addr = regInfo{inputs: []regMask{sp | sb}, outputs: gponly}
addridx = regInfo{inputs: []regMask{sp | sb, ptrsp}, outputs: gponly}
gp2flags = regInfo{inputs: []regMask{gpsp, gpsp}}
gp1flags = regInfo{inputs: []regMask{gpsp}}
flagsgp = regInfo{outputs: gponly}
gp2flags1 = regInfo{inputs: []regMask{gp, gp}, outputs: gponly}
gpload = regInfo{inputs: []regMask{ptrspsb, 0}, outputs: gponly}
gploadidx = regInfo{inputs: []regMask{ptrspsb, ptrsp, 0}, outputs: gponly}
gpopload = regInfo{inputs: []regMask{gp, ptrsp, 0}, outputs: gponly}
gpstore = regInfo{inputs: []regMask{ptrspsb, gpsp, 0}}
gpstoreconst = regInfo{inputs: []regMask{ptrspsb, 0}}
gpstoreidx = regInfo{inputs: []regMask{ptrsp, ptrsp, gpsp, 0}}
gpstorebr = regInfo{inputs: []regMask{ptrsp, gpsp, 0}}
gpstorelaa = regInfo{inputs: []regMask{ptrspsb, gpsp, 0}, outputs: gponly}
gpmvc = regInfo{inputs: []regMask{ptrsp, ptrsp, 0}}
fp01 = regInfo{inputs: []regMask{}, outputs: fponly}
fp21 = regInfo{inputs: []regMask{fp, fp}, outputs: fponly}
fp31 = regInfo{inputs: []regMask{fp, fp, fp}, outputs: fponly}
fp21clobber = regInfo{inputs: []regMask{fp, fp}, outputs: fponly}
fpgp = regInfo{inputs: fponly, outputs: gponly}
gpfp = regInfo{inputs: gponly, outputs: fponly}
fp11 = regInfo{inputs: fponly, outputs: fponly}
fp11clobber = regInfo{inputs: fponly, outputs: fponly}
fp2flags = regInfo{inputs: []regMask{fp, fp}}
fpload = regInfo{inputs: []regMask{ptrspsb, 0}, outputs: fponly}
fploadidx = regInfo{inputs: []regMask{ptrsp, ptrsp, 0}, outputs: fponly}
fpstore = regInfo{inputs: []regMask{ptrspsb, fp, 0}}
fpstoreidx = regInfo{inputs: []regMask{ptrsp, ptrsp, fp, 0}}
// LoweredAtomicCas may overwrite arg1, so force it to R0 for now.
cas = regInfo{inputs: []regMask{ptrsp, r0, gpsp, 0}, outputs: []regMask{gp, 0}, clobbers: r0}
// LoweredAtomicExchange overwrites the output before executing
// CS{,G}, so the output register must not be the same as the
// input register. For now we just force the output register to
// R0.
exchange = regInfo{inputs: []regMask{ptrsp, gpsp &^ r0, 0}, outputs: []regMask{r0, 0}}
)
var S390Xops = []opData{
// fp ops
{name: "FADDS", argLength: 2, reg: fp21clobber, asm: "FADDS", commutative: true, resultInArg0: true, clobberFlags: true}, // fp32 arg0 + arg1
{name: "FADD", argLength: 2, reg: fp21clobber, asm: "FADD", commutative: true, resultInArg0: true, clobberFlags: true}, // fp64 arg0 + arg1
{name: "FSUBS", argLength: 2, reg: fp21clobber, asm: "FSUBS", resultInArg0: true, clobberFlags: true}, // fp32 arg0 - arg1
{name: "FSUB", argLength: 2, reg: fp21clobber, asm: "FSUB", resultInArg0: true, clobberFlags: true}, // fp64 arg0 - arg1
{name: "FMULS", argLength: 2, reg: fp21, asm: "FMULS", commutative: true, resultInArg0: true}, // fp32 arg0 * arg1
{name: "FMUL", argLength: 2, reg: fp21, asm: "FMUL", commutative: true, resultInArg0: true}, // fp64 arg0 * arg1
{name: "FDIVS", argLength: 2, reg: fp21, asm: "FDIVS", resultInArg0: true}, // fp32 arg0 / arg1
{name: "FDIV", argLength: 2, reg: fp21, asm: "FDIV", resultInArg0: true}, // fp64 arg0 / arg1
{name: "FNEGS", argLength: 1, reg: fp11clobber, asm: "FNEGS", clobberFlags: true}, // fp32 -arg0
{name: "FNEG", argLength: 1, reg: fp11clobber, asm: "FNEG", clobberFlags: true}, // fp64 -arg0
{name: "FMADDS", argLength: 3, reg: fp31, asm: "FMADDS", resultInArg0: true}, // fp32 arg1 * arg2 + arg0
{name: "FMADD", argLength: 3, reg: fp31, asm: "FMADD", resultInArg0: true}, // fp64 arg1 * arg2 + arg0
{name: "FMSUBS", argLength: 3, reg: fp31, asm: "FMSUBS", resultInArg0: true}, // fp32 arg1 * arg2 - arg0
{name: "FMSUB", argLength: 3, reg: fp31, asm: "FMSUB", resultInArg0: true}, // fp64 arg1 * arg2 - arg0
{name: "LPDFR", argLength: 1, reg: fp11, asm: "LPDFR"}, // fp64/fp32 set sign bit
{name: "LNDFR", argLength: 1, reg: fp11, asm: "LNDFR"}, // fp64/fp32 clear sign bit
{name: "CPSDR", argLength: 2, reg: fp21, asm: "CPSDR"}, // fp64/fp32 copy arg1 sign bit to arg0
// Round to integer, float64 only.
//
// aux | rounding mode
// ----+-----------------------------------
// 1 | round to nearest, ties away from 0
// 4 | round to nearest, ties to even
// 5 | round toward 0
// 6 | round toward +∞
// 7 | round toward -∞
{name: "FIDBR", argLength: 1, reg: fp11, asm: "FIDBR", aux: "Int8"},
{name: "FMOVSload", argLength: 2, reg: fpload, asm: "FMOVS", aux: "SymOff", faultOnNilArg0: true, symEffect: "Read"}, // fp32 load
{name: "FMOVDload", argLength: 2, reg: fpload, asm: "FMOVD", aux: "SymOff", faultOnNilArg0: true, symEffect: "Read"}, // fp64 load
{name: "FMOVSconst", reg: fp01, asm: "FMOVS", aux: "Float32", rematerializeable: true}, // fp32 constant
{name: "FMOVDconst", reg: fp01, asm: "FMOVD", aux: "Float64", rematerializeable: true}, // fp64 constant
{name: "FMOVSloadidx", argLength: 3, reg: fploadidx, asm: "FMOVS", aux: "SymOff", symEffect: "Read"}, // fp32 load indexed by i
{name: "FMOVDloadidx", argLength: 3, reg: fploadidx, asm: "FMOVD", aux: "SymOff", symEffect: "Read"}, // fp64 load indexed by i
{name: "FMOVSstore", argLength: 3, reg: fpstore, asm: "FMOVS", aux: "SymOff", faultOnNilArg0: true, symEffect: "Write"}, // fp32 store
{name: "FMOVDstore", argLength: 3, reg: fpstore, asm: "FMOVD", aux: "SymOff", faultOnNilArg0: true, symEffect: "Write"}, // fp64 store
{name: "FMOVSstoreidx", argLength: 4, reg: fpstoreidx, asm: "FMOVS", aux: "SymOff", symEffect: "Write"}, // fp32 indexed by i store
{name: "FMOVDstoreidx", argLength: 4, reg: fpstoreidx, asm: "FMOVD", aux: "SymOff", symEffect: "Write"}, // fp64 indexed by i store
// binary ops
{name: "ADD", argLength: 2, reg: gp21sp, asm: "ADD", commutative: true, clobberFlags: true}, // arg0 + arg1
{name: "ADDW", argLength: 2, reg: gp21sp, asm: "ADDW", commutative: true, clobberFlags: true}, // arg0 + arg1
{name: "ADDconst", argLength: 1, reg: gp11sp, asm: "ADD", aux: "Int32", typ: "UInt64", clobberFlags: true}, // arg0 + auxint
{name: "ADDWconst", argLength: 1, reg: gp11sp, asm: "ADDW", aux: "Int32", clobberFlags: true}, // arg0 + auxint
{name: "ADDload", argLength: 3, reg: gpopload, asm: "ADD", aux: "SymOff", resultInArg0: true, clobberFlags: true, faultOnNilArg1: true, symEffect: "Read"}, // arg0 + *arg1. arg2=mem
{name: "ADDWload", argLength: 3, reg: gpopload, asm: "ADDW", aux: "SymOff", resultInArg0: true, clobberFlags: true, faultOnNilArg1: true, symEffect: "Read"}, // arg0 + *arg1. arg2=mem
{name: "SUB", argLength: 2, reg: gp21, asm: "SUB", clobberFlags: true}, // arg0 - arg1
{name: "SUBW", argLength: 2, reg: gp21, asm: "SUBW", clobberFlags: true}, // arg0 - arg1
{name: "SUBconst", argLength: 1, reg: gp11, asm: "SUB", aux: "Int32", resultInArg0: true, clobberFlags: true}, // arg0 - auxint
{name: "SUBWconst", argLength: 1, reg: gp11, asm: "SUBW", aux: "Int32", resultInArg0: true, clobberFlags: true}, // arg0 - auxint
{name: "SUBload", argLength: 3, reg: gpopload, asm: "SUB", aux: "SymOff", resultInArg0: true, clobberFlags: true, faultOnNilArg1: true, symEffect: "Read"}, // arg0 - *arg1. arg2=mem
{name: "SUBWload", argLength: 3, reg: gpopload, asm: "SUBW", aux: "SymOff", resultInArg0: true, clobberFlags: true, faultOnNilArg1: true, symEffect: "Read"}, // arg0 - *arg1. arg2=mem
{name: "MULLD", argLength: 2, reg: gp21, asm: "MULLD", typ: "Int64", commutative: true, resultInArg0: true, clobberFlags: true}, // arg0 * arg1
{name: "MULLW", argLength: 2, reg: gp21, asm: "MULLW", typ: "Int32", commutative: true, resultInArg0: true, clobberFlags: true}, // arg0 * arg1
{name: "MULLDconst", argLength: 1, reg: gp11, asm: "MULLD", aux: "Int32", typ: "Int64", resultInArg0: true, clobberFlags: true}, // arg0 * auxint
{name: "MULLWconst", argLength: 1, reg: gp11, asm: "MULLW", aux: "Int32", typ: "Int32", resultInArg0: true, clobberFlags: true}, // arg0 * auxint
{name: "MULLDload", argLength: 3, reg: gpopload, asm: "MULLD", aux: "SymOff", resultInArg0: true, clobberFlags: true, faultOnNilArg1: true, symEffect: "Read"}, // arg0 * *arg1. arg2=mem
{name: "MULLWload", argLength: 3, reg: gpopload, asm: "MULLW", aux: "SymOff", resultInArg0: true, clobberFlags: true, faultOnNilArg1: true, symEffect: "Read"}, // arg0 * *arg1. arg2=mem
{name: "MULHD", argLength: 2, reg: gp21, asm: "MULHD", typ: "Int64", commutative: true, resultInArg0: true, clobberFlags: true}, // (arg0 * arg1) >> width
{name: "MULHDU", argLength: 2, reg: gp21, asm: "MULHDU", typ: "Int64", commutative: true, resultInArg0: true, clobberFlags: true}, // (arg0 * arg1) >> width
{name: "DIVD", argLength: 2, reg: gp21, asm: "DIVD", resultInArg0: true, clobberFlags: true}, // arg0 / arg1
{name: "DIVW", argLength: 2, reg: gp21, asm: "DIVW", resultInArg0: true, clobberFlags: true}, // arg0 / arg1
{name: "DIVDU", argLength: 2, reg: gp21, asm: "DIVDU", resultInArg0: true, clobberFlags: true}, // arg0 / arg1
{name: "DIVWU", argLength: 2, reg: gp21, asm: "DIVWU", resultInArg0: true, clobberFlags: true}, // arg0 / arg1
{name: "MODD", argLength: 2, reg: gp21, asm: "MODD", resultInArg0: true, clobberFlags: true}, // arg0 % arg1
{name: "MODW", argLength: 2, reg: gp21, asm: "MODW", resultInArg0: true, clobberFlags: true}, // arg0 % arg1
{name: "MODDU", argLength: 2, reg: gp21, asm: "MODDU", resultInArg0: true, clobberFlags: true}, // arg0 % arg1
{name: "MODWU", argLength: 2, reg: gp21, asm: "MODWU", resultInArg0: true, clobberFlags: true}, // arg0 % arg1
{name: "AND", argLength: 2, reg: gp21, asm: "AND", commutative: true, clobberFlags: true}, // arg0 & arg1
{name: "ANDW", argLength: 2, reg: gp21, asm: "ANDW", commutative: true, clobberFlags: true}, // arg0 & arg1
{name: "ANDconst", argLength: 1, reg: gp11, asm: "AND", aux: "Int64", resultInArg0: true, clobberFlags: true}, // arg0 & auxint
{name: "ANDWconst", argLength: 1, reg: gp11, asm: "ANDW", aux: "Int32", resultInArg0: true, clobberFlags: true}, // arg0 & auxint
{name: "ANDload", argLength: 3, reg: gpopload, asm: "AND", aux: "SymOff", resultInArg0: true, clobberFlags: true, faultOnNilArg1: true, symEffect: "Read"}, // arg0 & *arg1. arg2=mem
{name: "ANDWload", argLength: 3, reg: gpopload, asm: "ANDW", aux: "SymOff", resultInArg0: true, clobberFlags: true, faultOnNilArg1: true, symEffect: "Read"}, // arg0 & *arg1. arg2=mem
{name: "OR", argLength: 2, reg: gp21, asm: "OR", commutative: true, clobberFlags: true}, // arg0 | arg1
{name: "ORW", argLength: 2, reg: gp21, asm: "ORW", commutative: true, clobberFlags: true}, // arg0 | arg1
{name: "ORconst", argLength: 1, reg: gp11, asm: "OR", aux: "Int64", resultInArg0: true, clobberFlags: true}, // arg0 | auxint
{name: "ORWconst", argLength: 1, reg: gp11, asm: "ORW", aux: "Int32", resultInArg0: true, clobberFlags: true}, // arg0 | auxint
{name: "ORload", argLength: 3, reg: gpopload, asm: "OR", aux: "SymOff", resultInArg0: true, clobberFlags: true, faultOnNilArg1: true, symEffect: "Read"}, // arg0 | *arg1. arg2=mem
{name: "ORWload", argLength: 3, reg: gpopload, asm: "ORW", aux: "SymOff", resultInArg0: true, clobberFlags: true, faultOnNilArg1: true, symEffect: "Read"}, // arg0 | *arg1. arg2=mem
{name: "XOR", argLength: 2, reg: gp21, asm: "XOR", commutative: true, clobberFlags: true}, // arg0 ^ arg1
{name: "XORW", argLength: 2, reg: gp21, asm: "XORW", commutative: true, clobberFlags: true}, // arg0 ^ arg1
{name: "XORconst", argLength: 1, reg: gp11, asm: "XOR", aux: "Int64", resultInArg0: true, clobberFlags: true}, // arg0 ^ auxint
{name: "XORWconst", argLength: 1, reg: gp11, asm: "XORW", aux: "Int32", resultInArg0: true, clobberFlags: true}, // arg0 ^ auxint
{name: "XORload", argLength: 3, reg: gpopload, asm: "XOR", aux: "SymOff", resultInArg0: true, clobberFlags: true, faultOnNilArg1: true, symEffect: "Read"}, // arg0 ^ *arg1. arg2=mem
{name: "XORWload", argLength: 3, reg: gpopload, asm: "XORW", aux: "SymOff", resultInArg0: true, clobberFlags: true, faultOnNilArg1: true, symEffect: "Read"}, // arg0 ^ *arg1. arg2=mem
{name: "CMP", argLength: 2, reg: gp2flags, asm: "CMP", typ: "Flags"}, // arg0 compare to arg1
{name: "CMPW", argLength: 2, reg: gp2flags, asm: "CMPW", typ: "Flags"}, // arg0 compare to arg1
{name: "CMPU", argLength: 2, reg: gp2flags, asm: "CMPU", typ: "Flags"}, // arg0 compare to arg1
{name: "CMPWU", argLength: 2, reg: gp2flags, asm: "CMPWU", typ: "Flags"}, // arg0 compare to arg1
{name: "CMPconst", argLength: 1, reg: gp1flags, asm: "CMP", typ: "Flags", aux: "Int32"}, // arg0 compare to auxint
{name: "CMPWconst", argLength: 1, reg: gp1flags, asm: "CMPW", typ: "Flags", aux: "Int32"}, // arg0 compare to auxint
{name: "CMPUconst", argLength: 1, reg: gp1flags, asm: "CMPU", typ: "Flags", aux: "Int32"}, // arg0 compare to auxint
{name: "CMPWUconst", argLength: 1, reg: gp1flags, asm: "CMPWU", typ: "Flags", aux: "Int32"}, // arg0 compare to auxint
{name: "FCMPS", argLength: 2, reg: fp2flags, asm: "CEBR", typ: "Flags"}, // arg0 compare to arg1, f32
{name: "FCMP", argLength: 2, reg: fp2flags, asm: "FCMPU", typ: "Flags"}, // arg0 compare to arg1, f64
{name: "SLD", argLength: 2, reg: sh21, asm: "SLD"}, // arg0 << arg1, shift amount is mod 64
{name: "SLW", argLength: 2, reg: sh21, asm: "SLW"}, // arg0 << arg1, shift amount is mod 32
{name: "SLDconst", argLength: 1, reg: gp11, asm: "SLD", aux: "Int8"}, // arg0 << auxint, shift amount 0-63
{name: "SLWconst", argLength: 1, reg: gp11, asm: "SLW", aux: "Int8"}, // arg0 << auxint, shift amount 0-31
{name: "SRD", argLength: 2, reg: sh21, asm: "SRD"}, // unsigned arg0 >> arg1, shift amount is mod 64
{name: "SRW", argLength: 2, reg: sh21, asm: "SRW"}, // unsigned uint32(arg0) >> arg1, shift amount is mod 32
{name: "SRDconst", argLength: 1, reg: gp11, asm: "SRD", aux: "Int8"}, // unsigned arg0 >> auxint, shift amount 0-63
{name: "SRWconst", argLength: 1, reg: gp11, asm: "SRW", aux: "Int8"}, // unsigned uint32(arg0) >> auxint, shift amount 0-31
// Arithmetic shifts clobber flags.
{name: "SRAD", argLength: 2, reg: sh21, asm: "SRAD", clobberFlags: true}, // signed arg0 >> arg1, shift amount is mod 64
{name: "SRAW", argLength: 2, reg: sh21, asm: "SRAW", clobberFlags: true}, // signed int32(arg0) >> arg1, shift amount is mod 32
{name: "SRADconst", argLength: 1, reg: gp11, asm: "SRAD", aux: "Int8", clobberFlags: true}, // signed arg0 >> auxint, shift amount 0-63
{name: "SRAWconst", argLength: 1, reg: gp11, asm: "SRAW", aux: "Int8", clobberFlags: true}, // signed int32(arg0) >> auxint, shift amount 0-31
{name: "RLLGconst", argLength: 1, reg: gp11, asm: "RLLG", aux: "Int8"}, // arg0 rotate left auxint, rotate amount 0-63
{name: "RLLconst", argLength: 1, reg: gp11, asm: "RLL", aux: "Int8"}, // arg0 rotate left auxint, rotate amount 0-31
// unary ops
{name: "NEG", argLength: 1, reg: gp11, asm: "NEG", clobberFlags: true}, // -arg0
{name: "NEGW", argLength: 1, reg: gp11, asm: "NEGW", clobberFlags: true}, // -arg0
{name: "NOT", argLength: 1, reg: gp11, resultInArg0: true, clobberFlags: true}, // ^arg0
{name: "NOTW", argLength: 1, reg: gp11, resultInArg0: true, clobberFlags: true}, // ^arg0
{name: "FSQRT", argLength: 1, reg: fp11, asm: "FSQRT"}, // sqrt(arg0)
{name: "SUBEcarrymask", argLength: 1, reg: flagsgp, asm: "SUBE"}, // (int64)(-1) if carry is set, 0 if carry is clear.
{name: "SUBEWcarrymask", argLength: 1, reg: flagsgp, asm: "SUBE"}, // (int32)(-1) if carry is set, 0 if carry is clear.
// Note: 32-bits subtraction is not implemented in S390X. Temporarily use SUBE (64-bits).
{name: "MOVDEQ", argLength: 3, reg: gp2flags1, resultInArg0: true, asm: "MOVDEQ"}, // extract == condition from arg0
{name: "MOVDNE", argLength: 3, reg: gp2flags1, resultInArg0: true, asm: "MOVDNE"}, // extract != condition from arg0
{name: "MOVDLT", argLength: 3, reg: gp2flags1, resultInArg0: true, asm: "MOVDLT"}, // extract signed < condition from arg0
{name: "MOVDLE", argLength: 3, reg: gp2flags1, resultInArg0: true, asm: "MOVDLE"}, // extract signed <= condition from arg0
{name: "MOVDGT", argLength: 3, reg: gp2flags1, resultInArg0: true, asm: "MOVDGT"}, // extract signed > condition from arg0
{name: "MOVDGE", argLength: 3, reg: gp2flags1, resultInArg0: true, asm: "MOVDGE"}, // extract signed >= condition from arg0
// Different rules for floating point conditions because
// any comparison involving a NaN is always false and thus
// the patterns for inverting conditions cannot be used.
{name: "MOVDGTnoinv", argLength: 3, reg: gp2flags1, resultInArg0: true, asm: "MOVDGT"}, // extract floating > condition from arg0
{name: "MOVDGEnoinv", argLength: 3, reg: gp2flags1, resultInArg0: true, asm: "MOVDGE"}, // extract floating >= condition from arg0
{name: "MOVBreg", argLength: 1, reg: gp11sp, asm: "MOVB", typ: "Int64"}, // sign extend arg0 from int8 to int64
{name: "MOVBZreg", argLength: 1, reg: gp11sp, asm: "MOVBZ", typ: "UInt64"}, // zero extend arg0 from int8 to int64
{name: "MOVHreg", argLength: 1, reg: gp11sp, asm: "MOVH", typ: "Int64"}, // sign extend arg0 from int16 to int64
{name: "MOVHZreg", argLength: 1, reg: gp11sp, asm: "MOVHZ", typ: "UInt64"}, // zero extend arg0 from int16 to int64
{name: "MOVWreg", argLength: 1, reg: gp11sp, asm: "MOVW", typ: "Int64"}, // sign extend arg0 from int32 to int64
{name: "MOVWZreg", argLength: 1, reg: gp11sp, asm: "MOVWZ", typ: "UInt64"}, // zero extend arg0 from int32 to int64
{name: "MOVDreg", argLength: 1, reg: gp11sp, asm: "MOVD"}, // move from arg0
{name: "MOVDnop", argLength: 1, reg: gp11, resultInArg0: true}, // nop, return arg0 in same register
{name: "MOVDconst", reg: gp01, asm: "MOVD", typ: "UInt64", aux: "Int64", rematerializeable: true}, // auxint
{name: "LDGR", argLength: 1, reg: gpfp, asm: "LDGR"}, // move int64 to float64 (no conversion)
{name: "LGDR", argLength: 1, reg: fpgp, asm: "LGDR"}, // move float64 to int64 (no conversion)
{name: "CFDBRA", argLength: 1, reg: fpgp, asm: "CFDBRA"}, // convert float64 to int32
{name: "CGDBRA", argLength: 1, reg: fpgp, asm: "CGDBRA"}, // convert float64 to int64
{name: "CFEBRA", argLength: 1, reg: fpgp, asm: "CFEBRA"}, // convert float32 to int32
{name: "CGEBRA", argLength: 1, reg: fpgp, asm: "CGEBRA"}, // convert float32 to int64
{name: "CEFBRA", argLength: 1, reg: gpfp, asm: "CEFBRA"}, // convert int32 to float32
{name: "CDFBRA", argLength: 1, reg: gpfp, asm: "CDFBRA"}, // convert int32 to float64
{name: "CEGBRA", argLength: 1, reg: gpfp, asm: "CEGBRA"}, // convert int64 to float32
{name: "CDGBRA", argLength: 1, reg: gpfp, asm: "CDGBRA"}, // convert int64 to float64
{name: "LEDBR", argLength: 1, reg: fp11, asm: "LEDBR"}, // convert float64 to float32
{name: "LDEBR", argLength: 1, reg: fp11, asm: "LDEBR"}, // convert float32 to float64
{name: "MOVDaddr", argLength: 1, reg: addr, aux: "SymOff", rematerializeable: true, symEffect: "Read"}, // arg0 + auxint + offset encoded in aux
{name: "MOVDaddridx", argLength: 2, reg: addridx, aux: "SymOff", symEffect: "Read"}, // arg0 + arg1 + auxint + aux
// auxint+aux == add auxint and the offset of the symbol in aux (if any) to the effective address
{name: "MOVBZload", argLength: 2, reg: gpload, asm: "MOVBZ", aux: "SymOff", typ: "UInt8", clobberFlags: true, faultOnNilArg0: true, symEffect: "Read"}, // load byte from arg0+auxint+aux. arg1=mem. Zero extend.
{name: "MOVBload", argLength: 2, reg: gpload, asm: "MOVB", aux: "SymOff", clobberFlags: true, faultOnNilArg0: true, symEffect: "Read"}, // ditto, sign extend to int64
{name: "MOVHZload", argLength: 2, reg: gpload, asm: "MOVHZ", aux: "SymOff", typ: "UInt16", clobberFlags: true, faultOnNilArg0: true, symEffect: "Read"}, // load 2 bytes from arg0+auxint+aux. arg1=mem. Zero extend.
{name: "MOVHload", argLength: 2, reg: gpload, asm: "MOVH", aux: "SymOff", clobberFlags: true, faultOnNilArg0: true, symEffect: "Read"}, // ditto, sign extend to int64
{name: "MOVWZload", argLength: 2, reg: gpload, asm: "MOVWZ", aux: "SymOff", typ: "UInt32", clobberFlags: true, faultOnNilArg0: true, symEffect: "Read"}, // load 4 bytes from arg0+auxint+aux. arg1=mem. Zero extend.
{name: "MOVWload", argLength: 2, reg: gpload, asm: "MOVW", aux: "SymOff", clobberFlags: true, faultOnNilArg0: true, symEffect: "Read"}, // ditto, sign extend to int64
{name: "MOVDload", argLength: 2, reg: gpload, asm: "MOVD", aux: "SymOff", typ: "UInt64", clobberFlags: true, faultOnNilArg0: true, symEffect: "Read"}, // load 8 bytes from arg0+auxint+aux. arg1=mem
{name: "MOVWBR", argLength: 1, reg: gp11, asm: "MOVWBR"}, // arg0 swap bytes
{name: "MOVDBR", argLength: 1, reg: gp11, asm: "MOVDBR"}, // arg0 swap bytes
{name: "MOVHBRload", argLength: 2, reg: gpload, asm: "MOVHBR", aux: "SymOff", typ: "UInt16", clobberFlags: true, faultOnNilArg0: true, symEffect: "Read"}, // load 2 bytes from arg0+auxint+aux. arg1=mem. Reverse bytes.
{name: "MOVWBRload", argLength: 2, reg: gpload, asm: "MOVWBR", aux: "SymOff", typ: "UInt32", clobberFlags: true, faultOnNilArg0: true, symEffect: "Read"}, // load 4 bytes from arg0+auxint+aux. arg1=mem. Reverse bytes.
{name: "MOVDBRload", argLength: 2, reg: gpload, asm: "MOVDBR", aux: "SymOff", typ: "UInt64", clobberFlags: true, faultOnNilArg0: true, symEffect: "Read"}, // load 8 bytes from arg0+auxint+aux. arg1=mem. Reverse bytes.
{name: "MOVBstore", argLength: 3, reg: gpstore, asm: "MOVB", aux: "SymOff", typ: "Mem", clobberFlags: true, faultOnNilArg0: true, symEffect: "Write"}, // store byte in arg1 to arg0+auxint+aux. arg2=mem
{name: "MOVHstore", argLength: 3, reg: gpstore, asm: "MOVH", aux: "SymOff", typ: "Mem", clobberFlags: true, faultOnNilArg0: true, symEffect: "Write"}, // store 2 bytes in arg1 to arg0+auxint+aux. arg2=mem
{name: "MOVWstore", argLength: 3, reg: gpstore, asm: "MOVW", aux: "SymOff", typ: "Mem", clobberFlags: true, faultOnNilArg0: true, symEffect: "Write"}, // store 4 bytes in arg1 to arg0+auxint+aux. arg2=mem
{name: "MOVDstore", argLength: 3, reg: gpstore, asm: "MOVD", aux: "SymOff", typ: "Mem", clobberFlags: true, faultOnNilArg0: true, symEffect: "Write"}, // store 8 bytes in arg1 to arg0+auxint+aux. arg2=mem
{name: "MOVHBRstore", argLength: 3, reg: gpstorebr, asm: "MOVHBR", aux: "SymOff", typ: "Mem", clobberFlags: true, faultOnNilArg0: true, symEffect: "Write"}, // store 2 bytes in arg1 to arg0+auxint+aux. arg2=mem. Reverse bytes.
{name: "MOVWBRstore", argLength: 3, reg: gpstorebr, asm: "MOVWBR", aux: "SymOff", typ: "Mem", clobberFlags: true, faultOnNilArg0: true, symEffect: "Write"}, // store 4 bytes in arg1 to arg0+auxint+aux. arg2=mem. Reverse bytes.
{name: "MOVDBRstore", argLength: 3, reg: gpstorebr, asm: "MOVDBR", aux: "SymOff", typ: "Mem", clobberFlags: true, faultOnNilArg0: true, symEffect: "Write"}, // store 8 bytes in arg1 to arg0+auxint+aux. arg2=mem. Reverse bytes.
{name: "MVC", argLength: 3, reg: gpmvc, asm: "MVC", aux: "SymValAndOff", typ: "Mem", clobberFlags: true, faultOnNilArg0: true, faultOnNilArg1: true, symEffect: "None"}, // arg0=destptr, arg1=srcptr, arg2=mem, auxint=size,off
// indexed loads/stores
{name: "MOVBZloadidx", argLength: 3, reg: gploadidx, commutative: true, asm: "MOVBZ", aux: "SymOff", typ: "UInt8", clobberFlags: true, symEffect: "Read"}, // load a byte from arg0+arg1+auxint+aux. arg2=mem. Zero extend.
{name: "MOVBloadidx", argLength: 3, reg: gploadidx, commutative: true, asm: "MOVB", aux: "SymOff", typ: "Int8", clobberFlags: true, symEffect: "Read"}, // load a byte from arg0+arg1+auxint+aux. arg2=mem. Sign extend.
{name: "MOVHZloadidx", argLength: 3, reg: gploadidx, commutative: true, asm: "MOVHZ", aux: "SymOff", typ: "UInt16", clobberFlags: true, symEffect: "Read"}, // load 2 bytes from arg0+arg1+auxint+aux. arg2=mem. Zero extend.
{name: "MOVHloadidx", argLength: 3, reg: gploadidx, commutative: true, asm: "MOVH", aux: "SymOff", typ: "Int16", clobberFlags: true, symEffect: "Read"}, // load 2 bytes from arg0+arg1+auxint+aux. arg2=mem. Sign extend.
{name: "MOVWZloadidx", argLength: 3, reg: gploadidx, commutative: true, asm: "MOVWZ", aux: "SymOff", typ: "UInt32", clobberFlags: true, symEffect: "Read"}, // load 4 bytes from arg0+arg1+auxint+aux. arg2=mem. Zero extend.
{name: "MOVWloadidx", argLength: 3, reg: gploadidx, commutative: true, asm: "MOVW", aux: "SymOff", typ: "Int32", clobberFlags: true, symEffect: "Read"}, // load 4 bytes from arg0+arg1+auxint+aux. arg2=mem. Sign extend.
{name: "MOVDloadidx", argLength: 3, reg: gploadidx, commutative: true, asm: "MOVD", aux: "SymOff", typ: "UInt64", clobberFlags: true, symEffect: "Read"}, // load 8 bytes from arg0+arg1+auxint+aux. arg2=mem
{name: "MOVHBRloadidx", argLength: 3, reg: gploadidx, commutative: true, asm: "MOVHBR", aux: "SymOff", typ: "Int16", clobberFlags: true, symEffect: "Read"}, // load 2 bytes from arg0+arg1+auxint+aux. arg2=mem. Reverse bytes.
{name: "MOVWBRloadidx", argLength: 3, reg: gploadidx, commutative: true, asm: "MOVWBR", aux: "SymOff", typ: "Int32", clobberFlags: true, symEffect: "Read"}, // load 4 bytes from arg0+arg1+auxint+aux. arg2=mem. Reverse bytes.
{name: "MOVDBRloadidx", argLength: 3, reg: gploadidx, commutative: true, asm: "MOVDBR", aux: "SymOff", typ: "Int64", clobberFlags: true, symEffect: "Read"}, // load 8 bytes from arg0+arg1+auxint+aux. arg2=mem. Reverse bytes.
{name: "MOVBstoreidx", argLength: 4, reg: gpstoreidx, commutative: true, asm: "MOVB", aux: "SymOff", clobberFlags: true, symEffect: "Write"}, // store byte in arg2 to arg0+arg1+auxint+aux. arg3=mem
{name: "MOVHstoreidx", argLength: 4, reg: gpstoreidx, commutative: true, asm: "MOVH", aux: "SymOff", clobberFlags: true, symEffect: "Write"}, // store 2 bytes in arg2 to arg0+arg1+auxint+aux. arg3=mem
{name: "MOVWstoreidx", argLength: 4, reg: gpstoreidx, commutative: true, asm: "MOVW", aux: "SymOff", clobberFlags: true, symEffect: "Write"}, // store 4 bytes in arg2 to arg0+arg1+auxint+aux. arg3=mem
{name: "MOVDstoreidx", argLength: 4, reg: gpstoreidx, commutative: true, asm: "MOVD", aux: "SymOff", clobberFlags: true, symEffect: "Write"}, // store 8 bytes in arg2 to arg0+arg1+auxint+aux. arg3=mem
{name: "MOVHBRstoreidx", argLength: 4, reg: gpstoreidx, commutative: true, asm: "MOVHBR", aux: "SymOff", clobberFlags: true, symEffect: "Write"}, // store 2 bytes in arg2 to arg0+arg1+auxint+aux. arg3=mem. Reverse bytes.
{name: "MOVWBRstoreidx", argLength: 4, reg: gpstoreidx, commutative: true, asm: "MOVWBR", aux: "SymOff", clobberFlags: true, symEffect: "Write"}, // store 4 bytes in arg2 to arg0+arg1+auxint+aux. arg3=mem. Reverse bytes.
{name: "MOVDBRstoreidx", argLength: 4, reg: gpstoreidx, commutative: true, asm: "MOVDBR", aux: "SymOff", clobberFlags: true, symEffect: "Write"}, // store 8 bytes in arg2 to arg0+arg1+auxint+aux. arg3=mem. Reverse bytes.
// 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: "MOVHstoreconst", argLength: 2, reg: gpstoreconst, asm: "MOVH", aux: "SymValAndOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // store low 2 bytes of ...
{name: "MOVWstoreconst", argLength: 2, reg: gpstoreconst, asm: "MOVW", aux: "SymValAndOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // store low 4 bytes of ...
{name: "MOVDstoreconst", argLength: 2, reg: gpstoreconst, asm: "MOVD", aux: "SymValAndOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // store 8 bytes of ...
{name: "CLEAR", argLength: 2, reg: regInfo{inputs: []regMask{ptr, 0}}, asm: "CLEAR", aux: "SymValAndOff", typ: "Mem", clobberFlags: true, faultOnNilArg0: true, symEffect: "Write"},
{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{ptrsp, buildReg("R12"), 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{ptr}, clobbers: callerSave}, aux: "Int64", clobberFlags: true, call: true}, // call fn by pointer. arg0=codeptr, arg1=mem, auxint=argsize, returns mem
// (InvertFlags (CMP a b)) == (CMP 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 R12 (the closure pointer)
{name: "LoweredGetClosurePtr", reg: regInfo{outputs: []regMask{buildReg("R12")}}},
// arg0=ptr,arg1=mem, returns void. Faults if ptr is nil.
// LoweredGetCallerSP returns the SP of the caller of the current function.
{name: "LoweredGetCallerSP", reg: gp01, rematerializeable: true},
{name: "LoweredNilCheck", argLength: 2, reg: regInfo{inputs: []regMask{ptrsp}}, clobberFlags: true, nilCheck: true, faultOnNilArg0: true},
// Round ops to block fused-multiply-add extraction.
{name: "LoweredRound32F", argLength: 1, reg: fp11, resultInArg0: true},
{name: "LoweredRound64F", argLength: 1, reg: fp11, resultInArg0: true},
// MOVDconvert 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: "MOVDconvert", argLength: 2, reg: gp11sp, asm: "MOVD"},
// 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"}, // <
{name: "FlagGT"}, // >
// Atomic loads. These are just normal loads but return <value,memory> tuples
// so they can be properly ordered with other loads.
// load from arg0+auxint+aux. arg1=mem.
{name: "MOVWZatomicload", argLength: 2, reg: gpload, asm: "MOVWZ", aux: "SymOff", faultOnNilArg0: true, symEffect: "Read"},
{name: "MOVDatomicload", argLength: 2, reg: gpload, asm: "MOVD", aux: "SymOff", faultOnNilArg0: true, symEffect: "Read"},
// Atomic stores. These are just normal stores.
// store arg1 to arg0+auxint+aux. arg2=mem.
{name: "MOVWatomicstore", argLength: 3, reg: gpstore, asm: "MOVW", aux: "SymOff", typ: "Mem", clobberFlags: true, faultOnNilArg0: true, hasSideEffects: true, symEffect: "Write"},
{name: "MOVDatomicstore", argLength: 3, reg: gpstore, asm: "MOVD", aux: "SymOff", typ: "Mem", clobberFlags: true, faultOnNilArg0: true, hasSideEffects: true, symEffect: "Write"},
// Atomic adds.
// *(arg0+auxint+aux) += arg1. arg2=mem.
// Returns a tuple of <old contents of *(arg0+auxint+aux), memory>.
{name: "LAA", argLength: 3, reg: gpstorelaa, asm: "LAA", typ: "(UInt32,Mem)", aux: "SymOff", faultOnNilArg0: true, hasSideEffects: true, symEffect: "RdWr"},
{name: "LAAG", argLength: 3, reg: gpstorelaa, asm: "LAAG", typ: "(UInt64,Mem)", aux: "SymOff", faultOnNilArg0: true, hasSideEffects: true, symEffect: "RdWr"},
{name: "AddTupleFirst32", argLength: 2}, // arg1=tuple <x,y>. Returns <x+arg0,y>.
{name: "AddTupleFirst64", argLength: 2}, // arg1=tuple <x,y>. Returns <x+arg0,y>.
// Compare and swap.
// arg0 = pointer, arg1 = old value, arg2 = new value, arg3 = memory.
// if *(arg0+auxint+aux) == arg1 {
// *(arg0+auxint+aux) = arg2
// return (true, memory)
// } else {
// return (false, memory)
// }
// Note that these instructions also return the old value in arg1, but we ignore it.
// TODO: have these return flags instead of bool. The current system generates:
// CS ...
// MOVD $0, ret
// BNE 2(PC)
// MOVD $1, ret
// CMPW ret, $0
// BNE ...
// instead of just
// CS ...
// BEQ ...
// but we can't do that because memory-using ops can't generate flags yet
// (flagalloc wants to move flag-generating instructions around).
{name: "LoweredAtomicCas32", argLength: 4, reg: cas, asm: "CS", aux: "SymOff", clobberFlags: true, faultOnNilArg0: true, hasSideEffects: true, symEffect: "RdWr"},
{name: "LoweredAtomicCas64", argLength: 4, reg: cas, asm: "CSG", aux: "SymOff", clobberFlags: true, faultOnNilArg0: true, hasSideEffects: true, symEffect: "RdWr"},
// Lowered atomic swaps, emulated using compare-and-swap.
// store arg1 to arg0+auxint+aux, arg2=mem.
{name: "LoweredAtomicExchange32", argLength: 3, reg: exchange, asm: "CS", aux: "SymOff", clobberFlags: true, faultOnNilArg0: true, hasSideEffects: true, symEffect: "RdWr"},
{name: "LoweredAtomicExchange64", argLength: 3, reg: exchange, asm: "CSG", aux: "SymOff", clobberFlags: true, faultOnNilArg0: true, hasSideEffects: true, symEffect: "RdWr"},
// find leftmost one
{
name: "FLOGR",
argLength: 1,
reg: regInfo{inputs: gponly, outputs: []regMask{buildReg("R0")}, clobbers: buildReg("R1")},
asm: "FLOGR",
typ: "UInt64",
clobberFlags: true,
},
// store multiple
{
name: "STMG2",
argLength: 4,
reg: regInfo{inputs: []regMask{ptrsp, buildReg("R1"), buildReg("R2"), 0}},
aux: "SymOff",
typ: "Mem",
asm: "STMG",
faultOnNilArg0: true,
symEffect: "Write",
},
{
name: "STMG3",
argLength: 5,
reg: regInfo{inputs: []regMask{ptrsp, buildReg("R1"), buildReg("R2"), buildReg("R3"), 0}},
aux: "SymOff",
typ: "Mem",
asm: "STMG",
faultOnNilArg0: true,
symEffect: "Write",
},
{
name: "STMG4",
argLength: 6,
reg: regInfo{inputs: []regMask{
ptrsp,
buildReg("R1"),
buildReg("R2"),
buildReg("R3"),
buildReg("R4"),
0,
}},
aux: "SymOff",
typ: "Mem",
asm: "STMG",
faultOnNilArg0: true,
symEffect: "Write",
},
{
name: "STM2",
argLength: 4,
reg: regInfo{inputs: []regMask{ptrsp, buildReg("R1"), buildReg("R2"), 0}},
aux: "SymOff",
typ: "Mem",
asm: "STMY",
faultOnNilArg0: true,
symEffect: "Write",
},
{
name: "STM3",
argLength: 5,
reg: regInfo{inputs: []regMask{ptrsp, buildReg("R1"), buildReg("R2"), buildReg("R3"), 0}},
aux: "SymOff",
typ: "Mem",
asm: "STMY",
faultOnNilArg0: true,
symEffect: "Write",
},
{
name: "STM4",
argLength: 6,
reg: regInfo{inputs: []regMask{
ptrsp,
buildReg("R1"),
buildReg("R2"),
buildReg("R3"),
buildReg("R4"),
0,
}},
aux: "SymOff",
typ: "Mem",
asm: "STMY",
faultOnNilArg0: true,
symEffect: "Write",
},
// large move
// auxint = remaining bytes after loop (rem)
// arg0 = address of dst memory (in R1, changed as a side effect)
// arg1 = address of src memory (in R2, changed as a side effect)
// arg2 = pointer to last address to move in loop + 256
// arg3 = mem
// returns mem
//
// mvc: MVC $256, 0(R2), 0(R1)
// MOVD $256(R1), R1
// MOVD $256(R2), R2
// CMP R2, Rarg2
// BNE mvc
// MVC $rem, 0(R2), 0(R1) // if rem > 0
{
name: "LoweredMove",
aux: "Int64",
argLength: 4,
reg: regInfo{
inputs: []regMask{buildReg("R1"), buildReg("R2"), gpsp},
clobbers: buildReg("R1 R2"),
},
clobberFlags: true,
typ: "Mem",
faultOnNilArg0: true,
faultOnNilArg1: true,
},
// large clear
// auxint = remaining bytes after loop (rem)
// arg0 = address of dst memory (in R1, changed as a side effect)
// arg1 = pointer to last address to zero in loop + 256
// arg2 = mem
// returns mem
//
// clear: CLEAR $256, 0(R1)
// MOVD $256(R1), R1
// CMP R1, Rarg2
// BNE clear
// CLEAR $rem, 0(R1) // if rem > 0
{
name: "LoweredZero",
aux: "Int64",
argLength: 3,
reg: regInfo{
inputs: []regMask{buildReg("R1"), gpsp},
clobbers: buildReg("R1"),
},
clobberFlags: true,
typ: "Mem",
faultOnNilArg0: true,
},
}
var S390Xblocks = []blockData{
{name: "EQ"},
{name: "NE"},
{name: "LT"},
{name: "LE"},
{name: "GT"},
{name: "GE"},
{name: "GTF"}, // FP comparison
{name: "GEF"}, // FP comparison
}
archs = append(archs, arch{
name: "S390X",
pkg: "cmd/internal/obj/s390x",
genfile: "../../s390x/ssa.go",
ops: S390Xops,
blocks: S390Xblocks,
regnames: regNamesS390X,
gpregmask: gp,
fpregmask: fp,
framepointerreg: -1, // not used
linkreg: int8(num["R14"]),
})
}