Golang程序
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209行
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12.42 KB
// Copyright 2018 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"
var regNamesWasm = []string{
"R0",
"R1",
"R2",
"R3",
"R4",
"R5",
"R6",
"R7",
"R8",
"R9",
"R10",
"R11",
"R12",
"R13",
"R14",
"R15",
"F0",
"F1",
"F2",
"F3",
"F4",
"F5",
"F6",
"F7",
"F8",
"F9",
"F10",
"F11",
"F12",
"F13",
"F14",
"F15",
"SP",
"g",
// pseudo-registers
"SB",
}
func init() {
// Make map from reg names to reg integers.
if len(regNamesWasm) > 64 {
panic("too many registers")
}
num := map[string]int{}
for i, name := range regNamesWasm {
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
}
var (
gp = buildReg("R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15")
fp = buildReg("F0 F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 F12 F13 F14 F15")
gpsp = gp | buildReg("SP")
gpspsb = gpsp | buildReg("SB")
// The "registers", which are actually local variables, can get clobbered
// if we're switching goroutines, because it unwinds the WebAssembly stack.
callerSave = gp | fp | buildReg("g")
)
// Common regInfo
var (
gp01 = regInfo{inputs: nil, outputs: []regMask{gp}}
gp11 = regInfo{inputs: []regMask{gpsp}, outputs: []regMask{gp}}
gp21 = regInfo{inputs: []regMask{gpsp, gpsp}, outputs: []regMask{gp}}
gp31 = regInfo{inputs: []regMask{gpsp, gpsp, gpsp}, outputs: []regMask{gp}}
fp01 = regInfo{inputs: nil, outputs: []regMask{fp}}
fp11 = regInfo{inputs: []regMask{fp}, outputs: []regMask{fp}}
fp21 = regInfo{inputs: []regMask{fp, fp}, outputs: []regMask{fp}}
fp21gp = regInfo{inputs: []regMask{fp, fp}, outputs: []regMask{gp}}
gpload = regInfo{inputs: []regMask{gpspsb, 0}, outputs: []regMask{gp}}
gpstore = regInfo{inputs: []regMask{gpspsb, gpsp, 0}}
fpload = regInfo{inputs: []regMask{gpspsb, 0}, outputs: []regMask{fp}}
fpstore = regInfo{inputs: []regMask{gpspsb, fp, 0}}
// fpstoreconst = regInfo{inputs: []regMask{fp, 0}}
)
var WasmOps = []opData{
{name: "LoweredStaticCall", argLength: 1, reg: regInfo{clobbers: callerSave}, aux: "SymOff", call: true, symEffect: "None"}, // call static function aux.(*obj.LSym). arg0=mem, auxint=argsize, returns mem
{name: "LoweredClosureCall", argLength: 3, reg: regInfo{inputs: []regMask{gp, gp, 0}, clobbers: callerSave}, aux: "Int64", call: true}, // call function via closure. arg0=codeptr, arg1=closure, arg2=mem, auxint=argsize, returns mem
{name: "LoweredInterCall", argLength: 2, reg: regInfo{inputs: []regMask{gp}, clobbers: callerSave}, aux: "Int64", call: true}, // call fn by pointer. arg0=codeptr, arg1=mem, auxint=argsize, returns mem
{name: "LoweredAddr", argLength: 1, reg: gp11, aux: "SymOff", rematerializeable: true, symEffect: "Addr"}, // returns base+aux+auxint, arg0=base
{name: "LoweredMove", argLength: 3, reg: regInfo{inputs: []regMask{gp, gp}}, aux: "Int64"}, // large move. arg0=dst, arg1=src, arg2=mem, auxint=len/8, returns mem
{name: "LoweredZero", argLength: 2, reg: regInfo{inputs: []regMask{gp}}, aux: "Int64"}, // large zeroing. arg0=start, arg1=mem, auxint=len/8, returns mem
{name: "LoweredGetClosurePtr", reg: gp01}, // returns wasm.REG_CTXT, the closure pointer
{name: "LoweredGetCallerPC", reg: gp01, rematerializeable: true}, // returns the PC of the caller of the current function
{name: "LoweredGetCallerSP", reg: gp01, rematerializeable: true}, // returns the SP of the caller of the current function
{name: "LoweredNilCheck", argLength: 2, reg: regInfo{inputs: []regMask{gp}}, nilCheck: true, faultOnNilArg0: true}, // panic if arg0 is nil. arg1=mem
{name: "LoweredWB", argLength: 3, reg: regInfo{inputs: []regMask{gp, gp}}, aux: "Sym", symEffect: "None"}, // invokes runtime.gcWriteBarrier. arg0=destptr, arg1=srcptr, arg2=mem, aux=runtime.gcWriteBarrier
{name: "LoweredRound32F", argLength: 1, reg: fp11, typ: "Float32"}, // rounds arg0 to 32-bit float precision. arg0=value
// LoweredConvert 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
//
// TODO(neelance): LoweredConvert should not be necessary any more, since OpConvert does not need to be lowered any more (CL 108496).
{name: "LoweredConvert", argLength: 2, reg: regInfo{inputs: []regMask{gp}, outputs: []regMask{gp}}},
// The following are native WebAssembly instructions, see https://webassembly.github.io/spec/core/syntax/instructions.html
{name: "Select", asm: "Select", argLength: 3, reg: gp31}, // returns arg0 if arg2 != 0, otherwise returns arg1
{name: "I64Load8U", asm: "I64Load8U", argLength: 2, reg: gpload, aux: "Int64", typ: "UInt8"}, // read unsigned 8-bit integer from address arg0+aux, arg1=mem
{name: "I64Load8S", asm: "I64Load8S", argLength: 2, reg: gpload, aux: "Int64", typ: "Int8"}, // read signed 8-bit integer from address arg0+aux, arg1=mem
{name: "I64Load16U", asm: "I64Load16U", argLength: 2, reg: gpload, aux: "Int64", typ: "UInt16"}, // read unsigned 16-bit integer from address arg0+aux, arg1=mem
{name: "I64Load16S", asm: "I64Load16S", argLength: 2, reg: gpload, aux: "Int64", typ: "Int16"}, // read signed 16-bit integer from address arg0+aux, arg1=mem
{name: "I64Load32U", asm: "I64Load32U", argLength: 2, reg: gpload, aux: "Int64", typ: "UInt32"}, // read unsigned 32-bit integer from address arg0+aux, arg1=mem
{name: "I64Load32S", asm: "I64Load32S", argLength: 2, reg: gpload, aux: "Int64", typ: "Int32"}, // read signed 32-bit integer from address arg0+aux, arg1=mem
{name: "I64Load", asm: "I64Load", argLength: 2, reg: gpload, aux: "Int64", typ: "UInt64"}, // read 64-bit integer from address arg0+aux, arg1=mem
{name: "I64Store8", asm: "I64Store8", argLength: 3, reg: gpstore, aux: "Int64", typ: "Mem"}, // store 8-bit integer arg1 at address arg0+aux, arg2=mem, returns mem
{name: "I64Store16", asm: "I64Store16", argLength: 3, reg: gpstore, aux: "Int64", typ: "Mem"}, // store 16-bit integer arg1 at address arg0+aux, arg2=mem, returns mem
{name: "I64Store32", asm: "I64Store32", argLength: 3, reg: gpstore, aux: "Int64", typ: "Mem"}, // store 32-bit integer arg1 at address arg0+aux, arg2=mem, returns mem
{name: "I64Store", asm: "I64Store", argLength: 3, reg: gpstore, aux: "Int64", typ: "Mem"}, // store 64-bit integer arg1 at address arg0+aux, arg2=mem, returns mem
{name: "F32Load", asm: "F32Load", argLength: 2, reg: fpload, aux: "Int64", typ: "Float64"}, // read 32-bit float from address arg0+aux, arg1=mem
{name: "F64Load", asm: "F64Load", argLength: 2, reg: fpload, aux: "Int64", typ: "Float64"}, // read 64-bit float from address arg0+aux, arg1=mem
{name: "F32Store", asm: "F32Store", argLength: 3, reg: fpstore, aux: "Int64", typ: "Mem"}, // store 32-bit float arg1 at address arg0+aux, arg2=mem, returns mem
{name: "F64Store", asm: "F64Store", argLength: 3, reg: fpstore, aux: "Int64", typ: "Mem"}, // store 64-bit float arg1 at address arg0+aux, arg2=mem, returns mem
{name: "I64Const", reg: gp01, aux: "Int64", rematerializeable: true, typ: "Int64"}, // returns the constant integer aux
{name: "F64Const", reg: fp01, aux: "Float64", rematerializeable: true, typ: "Float64"}, // returns the constant float aux
{name: "I64Eqz", asm: "I64Eqz", argLength: 1, reg: gp11, typ: "Bool"}, // arg0 == 0
{name: "I64Eq", asm: "I64Eq", argLength: 2, reg: gp21, typ: "Bool"}, // arg0 == arg1
{name: "I64Ne", asm: "I64Ne", argLength: 2, reg: gp21, typ: "Bool"}, // arg0 != arg1
{name: "I64LtS", asm: "I64LtS", argLength: 2, reg: gp21, typ: "Bool"}, // arg0 < arg1 (signed)
{name: "I64LtU", asm: "I64LtU", argLength: 2, reg: gp21, typ: "Bool"}, // arg0 < arg1 (unsigned)
{name: "I64GtS", asm: "I64GtS", argLength: 2, reg: gp21, typ: "Bool"}, // arg0 > arg1 (signed)
{name: "I64GtU", asm: "I64GtU", argLength: 2, reg: gp21, typ: "Bool"}, // arg0 > arg1 (unsigned)
{name: "I64LeS", asm: "I64LeS", argLength: 2, reg: gp21, typ: "Bool"}, // arg0 <= arg1 (signed)
{name: "I64LeU", asm: "I64LeU", argLength: 2, reg: gp21, typ: "Bool"}, // arg0 <= arg1 (unsigned)
{name: "I64GeS", asm: "I64GeS", argLength: 2, reg: gp21, typ: "Bool"}, // arg0 >= arg1 (signed)
{name: "I64GeU", asm: "I64GeU", argLength: 2, reg: gp21, typ: "Bool"}, // arg0 >= arg1 (unsigned)
{name: "F64Eq", asm: "F64Eq", argLength: 2, reg: fp21gp, typ: "Bool"}, // arg0 == arg1
{name: "F64Ne", asm: "F64Ne", argLength: 2, reg: fp21gp, typ: "Bool"}, // arg0 != arg1
{name: "F64Lt", asm: "F64Lt", argLength: 2, reg: fp21gp, typ: "Bool"}, // arg0 < arg1
{name: "F64Gt", asm: "F64Gt", argLength: 2, reg: fp21gp, typ: "Bool"}, // arg0 > arg1
{name: "F64Le", asm: "F64Le", argLength: 2, reg: fp21gp, typ: "Bool"}, // arg0 <= arg1
{name: "F64Ge", asm: "F64Ge", argLength: 2, reg: fp21gp, typ: "Bool"}, // arg0 >= arg1
{name: "I64Add", asm: "I64Add", argLength: 2, reg: gp21, typ: "Int64"}, // arg0 + arg1
{name: "I64AddConst", asm: "I64Add", argLength: 1, reg: gp11, aux: "Int64", typ: "Int64"}, // arg0 + aux
{name: "I64Sub", asm: "I64Sub", argLength: 2, reg: gp21, typ: "Int64"}, // arg0 - arg1
{name: "I64Mul", asm: "I64Mul", argLength: 2, reg: gp21, typ: "Int64"}, // arg0 * arg1
{name: "I64DivS", asm: "I64DivS", argLength: 2, reg: gp21, typ: "Int64"}, // arg0 / arg1 (signed)
{name: "I64DivU", asm: "I64DivU", argLength: 2, reg: gp21, typ: "Int64"}, // arg0 / arg1 (unsigned)
{name: "I64RemS", asm: "I64RemS", argLength: 2, reg: gp21, typ: "Int64"}, // arg0 % arg1 (signed)
{name: "I64RemU", asm: "I64RemU", argLength: 2, reg: gp21, typ: "Int64"}, // arg0 % arg1 (unsigned)
{name: "I64And", asm: "I64And", argLength: 2, reg: gp21, typ: "Int64"}, // arg0 & arg1
{name: "I64Or", asm: "I64Or", argLength: 2, reg: gp21, typ: "Int64"}, // arg0 | arg1
{name: "I64Xor", asm: "I64Xor", argLength: 2, reg: gp21, typ: "Int64"}, // arg0 ^ arg1
{name: "I64Shl", asm: "I64Shl", argLength: 2, reg: gp21, typ: "Int64"}, // arg0 << (arg1 % 64)
{name: "I64ShrS", asm: "I64ShrS", argLength: 2, reg: gp21, typ: "Int64"}, // arg0 >> (arg1 % 64) (signed)
{name: "I64ShrU", asm: "I64ShrU", argLength: 2, reg: gp21, typ: "Int64"}, // arg0 >> (arg1 % 64) (unsigned)
{name: "F64Neg", asm: "F64Neg", argLength: 1, reg: fp11, typ: "Float64"}, // -arg0
{name: "F64Add", asm: "F64Add", argLength: 2, reg: fp21, typ: "Float64"}, // arg0 + arg1
{name: "F64Sub", asm: "F64Sub", argLength: 2, reg: fp21, typ: "Float64"}, // arg0 - arg1
{name: "F64Mul", asm: "F64Mul", argLength: 2, reg: fp21, typ: "Float64"}, // arg0 * arg1
{name: "F64Div", asm: "F64Div", argLength: 2, reg: fp21, typ: "Float64"}, // arg0 / arg1
{name: "I64TruncSF64", asm: "I64TruncSF64", argLength: 1, reg: regInfo{inputs: []regMask{fp}, outputs: []regMask{gp}}, typ: "Int64"}, // truncates the float arg0 to a signed integer
{name: "I64TruncUF64", asm: "I64TruncUF64", argLength: 1, reg: regInfo{inputs: []regMask{fp}, outputs: []regMask{gp}}, typ: "Int64"}, // truncates the float arg0 to an unsigned integer
{name: "F64ConvertSI64", asm: "F64ConvertSI64", argLength: 1, reg: regInfo{inputs: []regMask{gp}, outputs: []regMask{fp}}, typ: "Float64"}, // converts the signed integer arg0 to a float
{name: "F64ConvertUI64", asm: "F64ConvertUI64", argLength: 1, reg: regInfo{inputs: []regMask{gp}, outputs: []regMask{fp}}, typ: "Float64"}, // converts the unsigned integer arg0 to a float
}
archs = append(archs, arch{
name: "Wasm",
pkg: "cmd/internal/obj/wasm",
genfile: "../../wasm/ssa.go",
ops: WasmOps,
blocks: nil,
regnames: regNamesWasm,
gpregmask: gp,
fpregmask: fp,
framepointerreg: -1, // not used
linkreg: -1, // not used
})
}