| // 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 "cmd/internal/obj/riscv" |
| |
| // 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 |
| |
| func init() { |
| var regNamesRISCV64 []string |
| var gpMask, fpMask, gpspMask, gpspsbMask 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 = riscv.RegName(r) |
| } |
| regNamesRISCV64 = append(regNamesRISCV64, name) |
| regNamed[name] = mask |
| return mask |
| } |
| |
| // General purpose registers. |
| for r := riscv.REG_X0; r <= riscv.REG_X31; r++ { |
| if r == riscv.REG_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, g, and TMP are not in any gp mask. |
| case riscv.REG_ZERO, riscv.REG_G, riscv.REG_TMP: |
| case riscv.REG_SP: |
| gpspMask |= mask |
| gpspsbMask |= mask |
| default: |
| gpMask |= mask |
| gpspMask |= mask |
| gpspsbMask |= mask |
| } |
| } |
| |
| // Floating pointer registers. |
| for r := riscv.REG_F0; r <= riscv.REG_F31; r++ { |
| mask := addreg(r, "") |
| fpMask |= mask |
| } |
| |
| // Pseudo-register: SB |
| mask := addreg(-1, "SB") |
| gpspsbMask |= 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 |
| 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}} |
| |
| 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: "SUB", argLength: 2, reg: gp21, asm: "SUB"}, // arg0 - arg1 |
| |
| // 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: "MOVBconst", reg: gp01, asm: "MOV", typ: "UInt8", aux: "Int8", rematerializeable: true}, // 8 low bits of auxint |
| {name: "MOVHconst", reg: gp01, asm: "MOV", typ: "UInt16", aux: "Int16", rematerializeable: true}, // 16 low bits of auxint |
| {name: "MOVWconst", reg: gp01, asm: "MOV", typ: "UInt32", aux: "Int32", rematerializeable: true}, // 32 low bits of auxint |
| {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 |
| |
| // Shift ops |
| {name: "SLL", argLength: 2, reg: gp21, asm: "SLL"}, // arg0 << aux1 |
| {name: "SRA", argLength: 2, reg: gp21, asm: "SRA"}, // arg0 >> aux1, signed |
| {name: "SRL", argLength: 2, reg: gp21, asm: "SRL"}, // arg0 >> aux1, unsigned |
| {name: "SLLI", argLength: 1, reg: gp11, asm: "SLLI", aux: "Int64"}, // arg0 << auxint |
| {name: "SRAI", argLength: 1, reg: gp11, asm: "SRAI", aux: "Int64"}, // arg0 >> auxint, signed |
| {name: "SRLI", argLength: 1, reg: gp11, asm: "SRLI", aux: "Int64"}, // arg0 >> auxint, unsigned |
| |
| // 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 |
| |
| // 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: "SymOff", call: true, symEffect: "None"}, // call static function aux.(*gc.Sym). arg0=mem, auxint=argsize, returns mem |
| {name: "CALLclosure", argLength: 3, reg: callClosure, aux: "Int64", call: true}, // call function via closure. arg0=codeptr, arg1=closure, arg2=mem, auxint=argsize, returns mem |
| {name: "CALLinter", argLength: 2, reg: callInter, aux: "Int64", call: true}, // call fn by pointer. arg0=codeptr, arg1=mem, auxint=argsize, returns mem |
| |
| // 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, |
| }, |
| |
| // 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"}, // 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"}, // 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"}, // 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: "BNE", controls: 1}, // Control != 0 (take a register) |
| } |
| |
| 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 |
| }) |
| } |
