// 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: "I64TruncSatF64S", asm: "I64TruncSatF64S", argLength: 1, reg: regInfo{inputs: []regMask{fp}, outputs: []regMask{gp}}, typ: "Int64"}, // truncates the float arg0 to a signed integer (saturating) {name: "I64TruncSatF64U", asm: "I64TruncSatF64U", argLength: 1, reg: regInfo{inputs: []regMask{fp}, outputs: []regMask{gp}}, typ: "Int64"}, // truncates the float arg0 to an unsigned integer (saturating) {name: "F64ConvertI64S", asm: "F64ConvertI64S", argLength: 1, reg: regInfo{inputs: []regMask{gp}, outputs: []regMask{fp}}, typ: "Float64"}, // converts the signed integer arg0 to a float {name: "F64ConvertI64U", asm: "F64ConvertI64U", argLength: 1, reg: regInfo{inputs: []regMask{gp}, outputs: []regMask{fp}}, typ: "Float64"}, // converts the unsigned integer arg0 to a float {name: "I64Extend8S", asm: "I64Extend8S", argLength: 1, reg: gp11, typ: "Int64"}, // sign-extend arg0 from 8 to 64 bit {name: "I64Extend16S", asm: "I64Extend16S", argLength: 1, reg: gp11, typ: "Int64"}, // sign-extend arg0 from 16 to 64 bit {name: "I64Extend32S", asm: "I64Extend32S", argLength: 1, reg: gp11, typ: "Int64"}, // sign-extend arg0 from 32 to 64 bit {name: "F64Sqrt", asm: "F64Sqrt", argLength: 1, reg: fp11, typ: "Float64"}, // sqrt(arg0) {name: "F64Trunc", asm: "F64Trunc", argLength: 1, reg: fp11, typ: "Float64"}, // trunc(arg0) {name: "F64Ceil", asm: "F64Ceil", argLength: 1, reg: fp11, typ: "Float64"}, // ceil(arg0) {name: "F64Floor", asm: "F64Floor", argLength: 1, reg: fp11, typ: "Float64"}, // floor(arg0) {name: "F64Nearest", asm: "F64Nearest", argLength: 1, reg: fp11, typ: "Float64"}, // round(arg0) {name: "F64Abs", asm: "F64Abs", argLength: 1, reg: fp11, typ: "Float64"}, // abs(arg0) {name: "F64Copysign", asm: "F64Copysign", argLength: 2, reg: fp21, typ: "Float64"}, // copysign(arg0, arg1) {name: "I64Ctz", asm: "I64Ctz", argLength: 1, reg: gp11, typ: "Int64"}, // ctz(arg0) {name: "I64Clz", asm: "I64Clz", argLength: 1, reg: gp11, typ: "Int64"}, // clz(arg0) {name: "I64Rotl", asm: "I64Rotl", argLength: 2, reg: gp21, typ: "Int64"}, // rotl(arg0, arg1) {name: "I64Popcnt", asm: "I64Popcnt", argLength: 1, reg: gp11, typ: "Int64"}, // popcnt(arg0) } 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 }) }