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Mini Shell
Mini Shell
// 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 (
"fmt"
)
// Notes:
// - Boolean types occupy the entire register. 0=false, 1=true.
// Suffixes encode the bit width of various instructions:
//
// D (double word) = 64 bit int
// W (word) = 32 bit int
// H (half word) = 16 bit int
// B (byte) = 8 bit int
// S (single) = 32 bit float
// D (double) = 64 bit float
// L = 64 bit int, used when the opcode starts with F
const (
riscv64REG_G = 27
riscv64REG_CTXT = 20
riscv64REG_LR = 1
riscv64REG_SP = 2
riscv64REG_TP = 4
riscv64REG_TMP = 31
riscv64REG_ZERO = 0
)
func riscv64RegName(r int) string {
switch {
case r == riscv64REG_G:
return "g"
case r == riscv64REG_SP:
return "SP"
case 0 <= r && r <= 31:
return fmt.Sprintf("X%d", r)
case 32 <= r && r <= 63:
return fmt.Sprintf("F%d", r-32)
default:
panic(fmt.Sprintf("unknown register %d", r))
}
}
func init() {
var regNamesRISCV64 []string
var gpMask, fpMask, gpgMask, gpspMask, gpspsbMask, gpspsbgMask regMask
regNamed := make(map[string]regMask)
// Build the list of register names, creating an appropriately indexed
// regMask for the gp and fp registers as we go.
//
// If name is specified, use it rather than the riscv reg number.
addreg := func(r int, name string) regMask {
mask := regMask(1) << uint(len(regNamesRISCV64))
if name == "" {
name = riscv64RegName(r)
}
regNamesRISCV64 = append(regNamesRISCV64, name)
regNamed[name] = mask
return mask
}
// General purpose registers.
for r := 0; r <= 31; r++ {
if r == riscv64REG_LR {
// LR is not used by regalloc, so we skip it to leave
// room for pseudo-register SB.
continue
}
mask := addreg(r, "")
// Add general purpose registers to gpMask.
switch r {
// ZERO, TP and TMP are not in any gp mask.
case riscv64REG_ZERO, riscv64REG_TP, riscv64REG_TMP:
case riscv64REG_G:
gpgMask |= mask
gpspsbgMask |= mask
case riscv64REG_SP:
gpspMask |= mask
gpspsbMask |= mask
gpspsbgMask |= mask
default:
gpMask |= mask
gpgMask |= mask
gpspMask |= mask
gpspsbMask |= mask
gpspsbgMask |= mask
}
}
// Floating pointer registers.
for r := 32; r <= 63; r++ {
mask := addreg(r, "")
fpMask |= mask
}
// Pseudo-register: SB
mask := addreg(-1, "SB")
gpspsbMask |= mask
gpspsbgMask |= mask
if len(regNamesRISCV64) > 64 {
// regMask is only 64 bits.
panic("Too many RISCV64 registers")
}
regCtxt := regNamed["X20"]
callerSave := gpMask | fpMask | regNamed["g"]
var (
gpstore = regInfo{inputs: []regMask{gpspsbMask, gpspMask, 0}} // SB in first input so we can load from a global, but not in second to avoid using SB as a temporary register
gpstore0 = regInfo{inputs: []regMask{gpspsbMask}}
gp01 = regInfo{outputs: []regMask{gpMask}}
gp11 = regInfo{inputs: []regMask{gpMask}, outputs: []regMask{gpMask}}
gp21 = regInfo{inputs: []regMask{gpMask, gpMask}, outputs: []regMask{gpMask}}
gpload = regInfo{inputs: []regMask{gpspsbMask, 0}, outputs: []regMask{gpMask}}
gp11sb = regInfo{inputs: []regMask{gpspsbMask}, outputs: []regMask{gpMask}}
gpxchg = regInfo{inputs: []regMask{gpspsbgMask, gpgMask}, outputs: []regMask{gpMask}}
gpcas = regInfo{inputs: []regMask{gpspsbgMask, gpgMask, gpgMask}, outputs: []regMask{gpMask}}
gpatomic = regInfo{inputs: []regMask{gpspsbgMask, gpgMask}}
fp11 = regInfo{inputs: []regMask{fpMask}, outputs: []regMask{fpMask}}
fp21 = regInfo{inputs: []regMask{fpMask, fpMask}, outputs: []regMask{fpMask}}
gpfp = regInfo{inputs: []regMask{gpMask}, outputs: []regMask{fpMask}}
fpgp = regInfo{inputs: []regMask{fpMask}, outputs: []regMask{gpMask}}
fpstore = regInfo{inputs: []regMask{gpspsbMask, fpMask, 0}}
fpload = regInfo{inputs: []regMask{gpspsbMask, 0}, outputs: []regMask{fpMask}}
fp2gp = regInfo{inputs: []regMask{fpMask, fpMask}, outputs: []regMask{gpMask}}
call = regInfo{clobbers: callerSave}
callClosure = regInfo{inputs: []regMask{gpspMask, regCtxt, 0}, clobbers: callerSave}
callInter = regInfo{inputs: []regMask{gpMask}, clobbers: callerSave}
)
RISCV64ops := []opData{
{name: "ADD", argLength: 2, reg: gp21, asm: "ADD", commutative: true}, // arg0 + arg1
{name: "ADDI", argLength: 1, reg: gp11sb, asm: "ADDI", aux: "Int64"}, // arg0 + auxint
{name: "ADDIW", argLength: 1, reg: gp11, asm: "ADDIW", aux: "Int64"}, // 32 low bits of arg0 + auxint, sign extended to 64 bits
{name: "NEG", argLength: 1, reg: gp11, asm: "NEG"}, // -arg0
{name: "NEGW", argLength: 1, reg: gp11, asm: "NEGW"}, // -arg0 of 32 bits, sign extended to 64 bits
{name: "SUB", argLength: 2, reg: gp21, asm: "SUB"}, // arg0 - arg1
{name: "SUBW", argLength: 2, reg: gp21, asm: "SUBW"}, // 32 low bits of arg 0 - 32 low bits of arg 1, sign extended to 64 bits
// M extension. H means high (i.e., it returns the top bits of
// the result). U means unsigned. W means word (i.e., 32-bit).
{name: "MUL", argLength: 2, reg: gp21, asm: "MUL", commutative: true, typ: "Int64"}, // arg0 * arg1
{name: "MULW", argLength: 2, reg: gp21, asm: "MULW", commutative: true, typ: "Int32"},
{name: "MULH", argLength: 2, reg: gp21, asm: "MULH", commutative: true, typ: "Int64"},
{name: "MULHU", argLength: 2, reg: gp21, asm: "MULHU", commutative: true, typ: "UInt64"},
{name: "DIV", argLength: 2, reg: gp21, asm: "DIV", typ: "Int64"}, // arg0 / arg1
{name: "DIVU", argLength: 2, reg: gp21, asm: "DIVU", typ: "UInt64"},
{name: "DIVW", argLength: 2, reg: gp21, asm: "DIVW", typ: "Int32"},
{name: "DIVUW", argLength: 2, reg: gp21, asm: "DIVUW", typ: "UInt32"},
{name: "REM", argLength: 2, reg: gp21, asm: "REM", typ: "Int64"}, // arg0 % arg1
{name: "REMU", argLength: 2, reg: gp21, asm: "REMU", typ: "UInt64"},
{name: "REMW", argLength: 2, reg: gp21, asm: "REMW", typ: "Int32"},
{name: "REMUW", argLength: 2, reg: gp21, asm: "REMUW", typ: "UInt32"},
{name: "MOVaddr", argLength: 1, reg: gp11sb, asm: "MOV", aux: "SymOff", rematerializeable: true, symEffect: "RdWr"}, // arg0 + auxint + offset encoded in aux
// auxint+aux == add auxint and the offset of the symbol in aux (if any) to the effective address
{name: "MOVDconst", reg: gp01, asm: "MOV", typ: "UInt64", aux: "Int64", rematerializeable: true}, // auxint
// Loads: load <size> bits from arg0+auxint+aux and extend to 64 bits; arg1=mem
{name: "MOVBload", argLength: 2, reg: gpload, asm: "MOVB", aux: "SymOff", typ: "Int8", faultOnNilArg0: true, symEffect: "Read"}, // 8 bits, sign extend
{name: "MOVHload", argLength: 2, reg: gpload, asm: "MOVH", aux: "SymOff", typ: "Int16", faultOnNilArg0: true, symEffect: "Read"}, // 16 bits, sign extend
{name: "MOVWload", argLength: 2, reg: gpload, asm: "MOVW", aux: "SymOff", typ: "Int32", faultOnNilArg0: true, symEffect: "Read"}, // 32 bits, sign extend
{name: "MOVDload", argLength: 2, reg: gpload, asm: "MOV", aux: "SymOff", typ: "Int64", faultOnNilArg0: true, symEffect: "Read"}, // 64 bits
{name: "MOVBUload", argLength: 2, reg: gpload, asm: "MOVBU", aux: "SymOff", typ: "UInt8", faultOnNilArg0: true, symEffect: "Read"}, // 8 bits, zero extend
{name: "MOVHUload", argLength: 2, reg: gpload, asm: "MOVHU", aux: "SymOff", typ: "UInt16", faultOnNilArg0: true, symEffect: "Read"}, // 16 bits, zero extend
{name: "MOVWUload", argLength: 2, reg: gpload, asm: "MOVWU", aux: "SymOff", typ: "UInt32", faultOnNilArg0: true, symEffect: "Read"}, // 32 bits, zero extend
// Stores: store <size> lowest bits in arg1 to arg0+auxint+aux; arg2=mem
{name: "MOVBstore", argLength: 3, reg: gpstore, asm: "MOVB", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // 8 bits
{name: "MOVHstore", argLength: 3, reg: gpstore, asm: "MOVH", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // 16 bits
{name: "MOVWstore", argLength: 3, reg: gpstore, asm: "MOVW", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // 32 bits
{name: "MOVDstore", argLength: 3, reg: gpstore, asm: "MOV", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // 64 bits
// Stores: store <size> of zero in arg0+auxint+aux; arg1=mem
{name: "MOVBstorezero", argLength: 2, reg: gpstore0, aux: "SymOff", asm: "MOVB", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // 8 bits
{name: "MOVHstorezero", argLength: 2, reg: gpstore0, aux: "SymOff", asm: "MOVH", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // 16 bits
{name: "MOVWstorezero", argLength: 2, reg: gpstore0, aux: "SymOff", asm: "MOVW", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // 32 bits
{name: "MOVDstorezero", argLength: 2, reg: gpstore0, aux: "SymOff", asm: "MOV", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // 64 bits
// Conversions
{name: "MOVBreg", argLength: 1, reg: gp11, asm: "MOVB"}, // move from arg0, sign-extended from byte
{name: "MOVHreg", argLength: 1, reg: gp11, asm: "MOVH"}, // move from arg0, sign-extended from half
{name: "MOVWreg", argLength: 1, reg: gp11, asm: "MOVW"}, // move from arg0, sign-extended from word
{name: "MOVDreg", argLength: 1, reg: gp11, asm: "MOV"}, // move from arg0
{name: "MOVBUreg", argLength: 1, reg: gp11, asm: "MOVBU"}, // move from arg0, unsign-extended from byte
{name: "MOVHUreg", argLength: 1, reg: gp11, asm: "MOVHU"}, // move from arg0, unsign-extended from half
{name: "MOVWUreg", argLength: 1, reg: gp11, asm: "MOVWU"}, // move from arg0, unsign-extended from word
{name: "MOVDnop", argLength: 1, reg: regInfo{inputs: []regMask{gpMask}, outputs: []regMask{gpMask}}, resultInArg0: true}, // nop, return arg0 in same register
// Shift ops
{name: "SLL", argLength: 2, reg: gp21, asm: "SLL"}, // arg0 << (aux1 & 63)
{name: "SRA", argLength: 2, reg: gp21, asm: "SRA"}, // arg0 >> (aux1 & 63), signed
{name: "SRL", argLength: 2, reg: gp21, asm: "SRL"}, // arg0 >> (aux1 & 63), unsigned
{name: "SLLI", argLength: 1, reg: gp11, asm: "SLLI", aux: "Int64"}, // arg0 << auxint, shift amount 0-63
{name: "SRAI", argLength: 1, reg: gp11, asm: "SRAI", aux: "Int64"}, // arg0 >> auxint, signed, shift amount 0-63
{name: "SRLI", argLength: 1, reg: gp11, asm: "SRLI", aux: "Int64"}, // arg0 >> auxint, unsigned, shift amount 0-63
// Bitwise ops
{name: "XOR", argLength: 2, reg: gp21, asm: "XOR", commutative: true}, // arg0 ^ arg1
{name: "XORI", argLength: 1, reg: gp11, asm: "XORI", aux: "Int64"}, // arg0 ^ auxint
{name: "OR", argLength: 2, reg: gp21, asm: "OR", commutative: true}, // arg0 | arg1
{name: "ORI", argLength: 1, reg: gp11, asm: "ORI", aux: "Int64"}, // arg0 | auxint
{name: "AND", argLength: 2, reg: gp21, asm: "AND", commutative: true}, // arg0 & arg1
{name: "ANDI", argLength: 1, reg: gp11, asm: "ANDI", aux: "Int64"}, // arg0 & auxint
{name: "NOT", argLength: 1, reg: gp11, asm: "NOT"}, // ^arg0
// Generate boolean values
{name: "SEQZ", argLength: 1, reg: gp11, asm: "SEQZ"}, // arg0 == 0, result is 0 or 1
{name: "SNEZ", argLength: 1, reg: gp11, asm: "SNEZ"}, // arg0 != 0, result is 0 or 1
{name: "SLT", argLength: 2, reg: gp21, asm: "SLT"}, // arg0 < arg1, result is 0 or 1
{name: "SLTI", argLength: 1, reg: gp11, asm: "SLTI", aux: "Int64"}, // arg0 < auxint, result is 0 or 1
{name: "SLTU", argLength: 2, reg: gp21, asm: "SLTU"}, // arg0 < arg1, unsigned, result is 0 or 1
{name: "SLTIU", argLength: 1, reg: gp11, asm: "SLTIU", aux: "Int64"}, // arg0 < auxint, unsigned, result is 0 or 1
// MOVconvert 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.
{name: "MOVconvert", argLength: 2, reg: gp11, asm: "MOV"}, // arg0, but converted to int/ptr as appropriate; arg1=mem
// Calls
{name: "CALLstatic", argLength: 1, reg: call, aux: "CallOff", call: true}, // call static function aux.(*gc.Sym). arg0=mem, auxint=argsize, returns mem
{name: "CALLclosure", argLength: 3, reg: callClosure, aux: "CallOff", call: true}, // call function via closure. arg0=codeptr, arg1=closure, arg2=mem, auxint=argsize, returns mem
{name: "CALLinter", argLength: 2, reg: callInter, aux: "CallOff", call: true}, // call fn by pointer. arg0=codeptr, arg1=mem, auxint=argsize, returns mem
// duffzero
// arg0 = address of memory to zero (in X10, changed as side effect)
// arg1 = mem
// auxint = offset into duffzero code to start executing
// X1 (link register) changed because of function call
// returns mem
{
name: "DUFFZERO",
aux: "Int64",
argLength: 2,
reg: regInfo{
inputs: []regMask{regNamed["X10"]},
clobbers: regNamed["X1"] | regNamed["X10"],
},
typ: "Mem",
faultOnNilArg0: true,
},
// duffcopy
// arg0 = address of dst memory (in X11, changed as side effect)
// arg1 = address of src memory (in X10, changed as side effect)
// arg2 = mem
// auxint = offset into duffcopy code to start executing
// X1 (link register) changed because of function call
// returns mem
{
name: "DUFFCOPY",
aux: "Int64",
argLength: 3,
reg: regInfo{
inputs: []regMask{regNamed["X11"], regNamed["X10"]},
clobbers: regNamed["X1"] | regNamed["X10"] | regNamed["X11"],
},
typ: "Mem",
faultOnNilArg0: true,
faultOnNilArg1: true,
},
// Generic moves and zeros
// general unaligned zeroing
// arg0 = address of memory to zero (in X5, changed as side effect)
// arg1 = address of the last element to zero (inclusive)
// arg2 = mem
// auxint = element size
// returns mem
// mov ZERO, (X5)
// ADD $sz, X5
// BGEU Rarg1, X5, -2(PC)
{
name: "LoweredZero",
aux: "Int64",
argLength: 3,
reg: regInfo{
inputs: []regMask{regNamed["X5"], gpMask},
clobbers: regNamed["X5"],
},
typ: "Mem",
faultOnNilArg0: true,
},
// general unaligned move
// arg0 = address of dst memory (in X5, changed as side effect)
// arg1 = address of src memory (in X6, changed as side effect)
// arg2 = address of the last element of src (can't be X7 as we clobber it before using arg2)
// arg3 = mem
// auxint = alignment
// clobbers X7 as a tmp register.
// returns mem
// mov (X6), X7
// mov X7, (X5)
// ADD $sz, X5
// ADD $sz, X6
// BGEU Rarg2, X5, -4(PC)
{
name: "LoweredMove",
aux: "Int64",
argLength: 4,
reg: regInfo{
inputs: []regMask{regNamed["X5"], regNamed["X6"], gpMask &^ regNamed["X7"]},
clobbers: regNamed["X5"] | regNamed["X6"] | regNamed["X7"],
},
typ: "Mem",
faultOnNilArg0: true,
faultOnNilArg1: true,
},
// Atomic loads.
// load from arg0. arg1=mem.
// returns <value,memory> so they can be properly ordered with other loads.
{name: "LoweredAtomicLoad8", argLength: 2, reg: gpload, faultOnNilArg0: true},
{name: "LoweredAtomicLoad32", argLength: 2, reg: gpload, faultOnNilArg0: true},
{name: "LoweredAtomicLoad64", argLength: 2, reg: gpload, faultOnNilArg0: true},
// Atomic stores.
// store arg1 to *arg0. arg2=mem. returns memory.
{name: "LoweredAtomicStore8", argLength: 3, reg: gpstore, faultOnNilArg0: true, hasSideEffects: true},
{name: "LoweredAtomicStore32", argLength: 3, reg: gpstore, faultOnNilArg0: true, hasSideEffects: true},
{name: "LoweredAtomicStore64", argLength: 3, reg: gpstore, faultOnNilArg0: true, hasSideEffects: true},
// Atomic exchange.
// store arg1 to *arg0. arg2=mem. returns <old content of *arg0, memory>.
{name: "LoweredAtomicExchange32", argLength: 3, reg: gpxchg, resultNotInArgs: true, faultOnNilArg0: true, hasSideEffects: true},
{name: "LoweredAtomicExchange64", argLength: 3, reg: gpxchg, resultNotInArgs: true, faultOnNilArg0: true, hasSideEffects: true},
// Atomic add.
// *arg0 += arg1. arg2=mem. returns <new content of *arg0, memory>.
{name: "LoweredAtomicAdd32", argLength: 3, reg: gpxchg, resultNotInArgs: true, faultOnNilArg0: true, hasSideEffects: true, unsafePoint: true},
{name: "LoweredAtomicAdd64", argLength: 3, reg: gpxchg, 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)
// }
// MOV $0, Rout
// LR (Rarg0), Rtmp
// BNE Rtmp, Rarg1, 3(PC)
// SC Rarg2, (Rarg0), Rtmp
// BNE Rtmp, ZERO, -3(PC)
// MOV $1, Rout
{name: "LoweredAtomicCas32", argLength: 4, reg: gpcas, resultNotInArgs: true, faultOnNilArg0: true, hasSideEffects: true, unsafePoint: true},
{name: "LoweredAtomicCas64", argLength: 4, reg: gpcas, resultNotInArgs: true, faultOnNilArg0: true, hasSideEffects: true, unsafePoint: true},
// Atomic 32 bit AND/OR.
// *arg0 &= (|=) arg1. arg2=mem. returns nil.
{name: "LoweredAtomicAnd32", argLength: 3, reg: gpatomic, asm: "AMOANDW", faultOnNilArg0: true, hasSideEffects: true},
{name: "LoweredAtomicOr32", argLength: 3, reg: gpatomic, asm: "AMOORW", faultOnNilArg0: true, hasSideEffects: true},
// Lowering pass-throughs
{name: "LoweredNilCheck", argLength: 2, faultOnNilArg0: true, nilCheck: true, reg: regInfo{inputs: []regMask{gpspMask}}}, // arg0=ptr,arg1=mem, returns void. Faults if ptr is nil.
{name: "LoweredGetClosurePtr", reg: regInfo{outputs: []regMask{regCtxt}}}, // scheduler ensures only at beginning of entry block
// 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 RA (LR) because it's a call
// and T6 (REG_TMP).
{name: "LoweredWB", argLength: 3, reg: regInfo{inputs: []regMask{regNamed["X5"], regNamed["X6"]}, clobbers: (callerSave &^ (gpMask | regNamed["g"])) | regNamed["X1"]}, 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{regNamed["X7"], regNamed["X28"]}}, 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{regNamed["X6"], regNamed["X7"]}}, 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{regNamed["X5"], regNamed["X6"]}}, typ: "Mem", call: true}, // arg0=idx, arg1=len, arg2=mem, returns memory. AuxInt contains report code (see PanicBounds in genericOps.go).
// F extension.
{name: "FADDS", argLength: 2, reg: fp21, asm: "FADDS", commutative: true, typ: "Float32"}, // arg0 + arg1
{name: "FSUBS", argLength: 2, reg: fp21, asm: "FSUBS", commutative: false, typ: "Float32"}, // arg0 - arg1
{name: "FMULS", argLength: 2, reg: fp21, asm: "FMULS", commutative: true, typ: "Float32"}, // arg0 * arg1
{name: "FDIVS", argLength: 2, reg: fp21, asm: "FDIVS", commutative: false, typ: "Float32"}, // arg0 / arg1
{name: "FSQRTS", argLength: 1, reg: fp11, asm: "FSQRTS", typ: "Float32"}, // sqrt(arg0)
{name: "FNEGS", argLength: 1, reg: fp11, asm: "FNEGS", typ: "Float32"}, // -arg0
{name: "FMVSX", argLength: 1, reg: gpfp, asm: "FMVSX", typ: "Float32"}, // reinterpret arg0 as float
{name: "FCVTSW", argLength: 1, reg: gpfp, asm: "FCVTSW", typ: "Float32"}, // float32(low 32 bits of arg0)
{name: "FCVTSL", argLength: 1, reg: gpfp, asm: "FCVTSL", typ: "Float32"}, // float32(arg0)
{name: "FCVTWS", argLength: 1, reg: fpgp, asm: "FCVTWS", typ: "Int32"}, // int32(arg0)
{name: "FCVTLS", argLength: 1, reg: fpgp, asm: "FCVTLS", typ: "Int64"}, // int64(arg0)
{name: "FMOVWload", argLength: 2, reg: fpload, asm: "MOVF", aux: "SymOff", typ: "Float32", faultOnNilArg0: true, symEffect: "Read"}, // load float32 from arg0+auxint+aux
{name: "FMOVWstore", argLength: 3, reg: fpstore, asm: "MOVF", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // store float32 to arg0+auxint+aux
{name: "FEQS", argLength: 2, reg: fp2gp, asm: "FEQS", commutative: true}, // arg0 == arg1
{name: "FNES", argLength: 2, reg: fp2gp, asm: "FNES", commutative: true}, // arg0 != arg1
{name: "FLTS", argLength: 2, reg: fp2gp, asm: "FLTS"}, // arg0 < arg1
{name: "FLES", argLength: 2, reg: fp2gp, asm: "FLES"}, // arg0 <= arg1
// D extension.
{name: "FADDD", argLength: 2, reg: fp21, asm: "FADDD", commutative: true, typ: "Float64"}, // arg0 + arg1
{name: "FSUBD", argLength: 2, reg: fp21, asm: "FSUBD", commutative: false, typ: "Float64"}, // arg0 - arg1
{name: "FMULD", argLength: 2, reg: fp21, asm: "FMULD", commutative: true, typ: "Float64"}, // arg0 * arg1
{name: "FDIVD", argLength: 2, reg: fp21, asm: "FDIVD", commutative: false, typ: "Float64"}, // arg0 / arg1
{name: "FSQRTD", argLength: 1, reg: fp11, asm: "FSQRTD", typ: "Float64"}, // sqrt(arg0)
{name: "FNEGD", argLength: 1, reg: fp11, asm: "FNEGD", typ: "Float64"}, // -arg0
{name: "FMVDX", argLength: 1, reg: gpfp, asm: "FMVDX", typ: "Float64"}, // reinterpret arg0 as float
{name: "FCVTDW", argLength: 1, reg: gpfp, asm: "FCVTDW", typ: "Float64"}, // float64(low 32 bits of arg0)
{name: "FCVTDL", argLength: 1, reg: gpfp, asm: "FCVTDL", typ: "Float64"}, // float64(arg0)
{name: "FCVTWD", argLength: 1, reg: fpgp, asm: "FCVTWD", typ: "Int32"}, // int32(arg0)
{name: "FCVTLD", argLength: 1, reg: fpgp, asm: "FCVTLD", typ: "Int64"}, // int64(arg0)
{name: "FCVTDS", argLength: 1, reg: fp11, asm: "FCVTDS", typ: "Float64"}, // float64(arg0)
{name: "FCVTSD", argLength: 1, reg: fp11, asm: "FCVTSD", typ: "Float32"}, // float32(arg0)
{name: "FMOVDload", argLength: 2, reg: fpload, asm: "MOVD", aux: "SymOff", typ: "Float64", faultOnNilArg0: true, symEffect: "Read"}, // load float64 from arg0+auxint+aux
{name: "FMOVDstore", argLength: 3, reg: fpstore, asm: "MOVD", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // store float6 to arg0+auxint+aux
{name: "FEQD", argLength: 2, reg: fp2gp, asm: "FEQD", commutative: true}, // arg0 == arg1
{name: "FNED", argLength: 2, reg: fp2gp, asm: "FNED", commutative: true}, // arg0 != arg1
{name: "FLTD", argLength: 2, reg: fp2gp, asm: "FLTD"}, // arg0 < arg1
{name: "FLED", argLength: 2, reg: fp2gp, asm: "FLED"}, // arg0 <= arg1
}
RISCV64blocks := []blockData{
{name: "BEQ", controls: 2},
{name: "BNE", controls: 2},
{name: "BLT", controls: 2},
{name: "BGE", controls: 2},
{name: "BLTU", controls: 2},
{name: "BGEU", controls: 2},
{name: "BEQZ", controls: 1},
{name: "BNEZ", controls: 1},
{name: "BLEZ", controls: 1},
{name: "BGEZ", controls: 1},
{name: "BLTZ", controls: 1},
{name: "BGTZ", controls: 1},
}
archs = append(archs, arch{
name: "RISCV64",
pkg: "cmd/internal/obj/riscv",
genfile: "../../riscv64/ssa.go",
ops: RISCV64ops,
blocks: RISCV64blocks,
regnames: regNamesRISCV64,
gpregmask: gpMask,
fpregmask: fpMask,
framepointerreg: -1, // not used
})
}
Zerion Mini Shell 1.0