1 // Copyright 2016 The Go Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
12 // - Boolean types occupy the entire register. 0=false, 1=true.
14 // Suffixes encode the bit width of various instructions:
16 // D (double word) = 64 bit int
17 // W (word) = 32 bit int
18 // H (half word) = 16 bit int
19 // B (byte) = 8 bit int
20 // S (single) = 32 bit float
21 // D (double) = 64 bit float
22 // L = 64 bit int, used when the opcode starts with F
35 func riscv64RegName(r int) string {
37 case r == riscv64REG_G:
39 case r == riscv64REG_SP:
41 case 0 <= r && r <= 31:
42 return fmt.Sprintf("X%d", r)
43 case 32 <= r && r <= 63:
44 return fmt.Sprintf("F%d", r-32)
46 panic(fmt.Sprintf("unknown register %d", r))
51 var regNamesRISCV64 []string
52 var gpMask, fpMask, gpgMask, gpspMask, gpspsbMask, gpspsbgMask regMask
53 regNamed := make(map[string]regMask)
55 // Build the list of register names, creating an appropriately indexed
56 // regMask for the gp and fp registers as we go.
58 // If name is specified, use it rather than the riscv reg number.
59 addreg := func(r int, name string) regMask {
60 mask := regMask(1) << uint(len(regNamesRISCV64))
62 name = riscv64RegName(r)
64 regNamesRISCV64 = append(regNamesRISCV64, name)
69 // General purpose registers.
70 for r := 0; r <= 31; r++ {
71 if r == riscv64REG_LR {
72 // LR is not used by regalloc, so we skip it to leave
73 // room for pseudo-register SB.
79 // Add general purpose registers to gpMask.
81 // ZERO, GP, TP and TMP are not in any gp mask.
82 case riscv64REG_ZERO, riscv64REG_GP, riscv64REG_TP, riscv64REG_TMP:
99 // Floating pointer registers.
100 for r := 32; r <= 63; r++ {
101 mask := addreg(r, "")
105 // Pseudo-register: SB
106 mask := addreg(-1, "SB")
110 if len(regNamesRISCV64) > 64 {
111 // regMask is only 64 bits.
112 panic("Too many RISCV64 registers")
115 regCtxt := regNamed["X26"]
116 callerSave := gpMask | fpMask | regNamed["g"]
119 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
120 gpstore0 = regInfo{inputs: []regMask{gpspsbMask}}
121 gp01 = regInfo{outputs: []regMask{gpMask}}
122 gp11 = regInfo{inputs: []regMask{gpMask}, outputs: []regMask{gpMask}}
123 gp21 = regInfo{inputs: []regMask{gpMask, gpMask}, outputs: []regMask{gpMask}}
124 gp22 = regInfo{inputs: []regMask{gpMask, gpMask}, outputs: []regMask{gpMask, gpMask}}
125 gpload = regInfo{inputs: []regMask{gpspsbMask, 0}, outputs: []regMask{gpMask}}
126 gp11sb = regInfo{inputs: []regMask{gpspsbMask}, outputs: []regMask{gpMask}}
127 gpxchg = regInfo{inputs: []regMask{gpspsbgMask, gpgMask}, outputs: []regMask{gpMask}}
128 gpcas = regInfo{inputs: []regMask{gpspsbgMask, gpgMask, gpgMask}, outputs: []regMask{gpMask}}
129 gpatomic = regInfo{inputs: []regMask{gpspsbgMask, gpgMask}}
131 fp11 = regInfo{inputs: []regMask{fpMask}, outputs: []regMask{fpMask}}
132 fp21 = regInfo{inputs: []regMask{fpMask, fpMask}, outputs: []regMask{fpMask}}
133 fp31 = regInfo{inputs: []regMask{fpMask, fpMask, fpMask}, outputs: []regMask{fpMask}}
134 gpfp = regInfo{inputs: []regMask{gpMask}, outputs: []regMask{fpMask}}
135 fpgp = regInfo{inputs: []regMask{fpMask}, outputs: []regMask{gpMask}}
136 fpstore = regInfo{inputs: []regMask{gpspsbMask, fpMask, 0}}
137 fpload = regInfo{inputs: []regMask{gpspsbMask, 0}, outputs: []regMask{fpMask}}
138 fp2gp = regInfo{inputs: []regMask{fpMask, fpMask}, outputs: []regMask{gpMask}}
140 call = regInfo{clobbers: callerSave}
141 callClosure = regInfo{inputs: []regMask{gpspMask, regCtxt, 0}, clobbers: callerSave}
142 callInter = regInfo{inputs: []regMask{gpMask}, clobbers: callerSave}
145 RISCV64ops := []opData{
146 {name: "ADD", argLength: 2, reg: gp21, asm: "ADD", commutative: true}, // arg0 + arg1
147 {name: "ADDI", argLength: 1, reg: gp11sb, asm: "ADDI", aux: "Int64"}, // arg0 + auxint
148 {name: "ADDIW", argLength: 1, reg: gp11, asm: "ADDIW", aux: "Int64"}, // 32 low bits of arg0 + auxint, sign extended to 64 bits
149 {name: "NEG", argLength: 1, reg: gp11, asm: "NEG"}, // -arg0
150 {name: "NEGW", argLength: 1, reg: gp11, asm: "NEGW"}, // -arg0 of 32 bits, sign extended to 64 bits
151 {name: "SUB", argLength: 2, reg: gp21, asm: "SUB"}, // arg0 - arg1
152 {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
154 // M extension. H means high (i.e., it returns the top bits of
155 // the result). U means unsigned. W means word (i.e., 32-bit).
156 {name: "MUL", argLength: 2, reg: gp21, asm: "MUL", commutative: true, typ: "Int64"}, // arg0 * arg1
157 {name: "MULW", argLength: 2, reg: gp21, asm: "MULW", commutative: true, typ: "Int32"},
158 {name: "MULH", argLength: 2, reg: gp21, asm: "MULH", commutative: true, typ: "Int64"},
159 {name: "MULHU", argLength: 2, reg: gp21, asm: "MULHU", commutative: true, typ: "UInt64"},
160 {name: "LoweredMuluhilo", argLength: 2, reg: gp22, resultNotInArgs: true}, // arg0 * arg1, return (hi, lo)
161 {name: "LoweredMuluover", argLength: 2, reg: gp22, resultNotInArgs: true}, // arg0 * arg1, return (64 bits of arg0*arg1, overflow)
163 {name: "DIV", argLength: 2, reg: gp21, asm: "DIV", typ: "Int64"}, // arg0 / arg1
164 {name: "DIVU", argLength: 2, reg: gp21, asm: "DIVU", typ: "UInt64"},
165 {name: "DIVW", argLength: 2, reg: gp21, asm: "DIVW", typ: "Int32"},
166 {name: "DIVUW", argLength: 2, reg: gp21, asm: "DIVUW", typ: "UInt32"},
167 {name: "REM", argLength: 2, reg: gp21, asm: "REM", typ: "Int64"}, // arg0 % arg1
168 {name: "REMU", argLength: 2, reg: gp21, asm: "REMU", typ: "UInt64"},
169 {name: "REMW", argLength: 2, reg: gp21, asm: "REMW", typ: "Int32"},
170 {name: "REMUW", argLength: 2, reg: gp21, asm: "REMUW", typ: "UInt32"},
172 {name: "MOVaddr", argLength: 1, reg: gp11sb, asm: "MOV", aux: "SymOff", rematerializeable: true, symEffect: "Addr"}, // arg0 + auxint + offset encoded in aux
173 // auxint+aux == add auxint and the offset of the symbol in aux (if any) to the effective address
175 {name: "MOVDconst", reg: gp01, asm: "MOV", typ: "UInt64", aux: "Int64", rematerializeable: true}, // auxint
177 // Loads: load <size> bits from arg0+auxint+aux and extend to 64 bits; arg1=mem
178 {name: "MOVBload", argLength: 2, reg: gpload, asm: "MOVB", aux: "SymOff", typ: "Int8", faultOnNilArg0: true, symEffect: "Read"}, // 8 bits, sign extend
179 {name: "MOVHload", argLength: 2, reg: gpload, asm: "MOVH", aux: "SymOff", typ: "Int16", faultOnNilArg0: true, symEffect: "Read"}, // 16 bits, sign extend
180 {name: "MOVWload", argLength: 2, reg: gpload, asm: "MOVW", aux: "SymOff", typ: "Int32", faultOnNilArg0: true, symEffect: "Read"}, // 32 bits, sign extend
181 {name: "MOVDload", argLength: 2, reg: gpload, asm: "MOV", aux: "SymOff", typ: "Int64", faultOnNilArg0: true, symEffect: "Read"}, // 64 bits
182 {name: "MOVBUload", argLength: 2, reg: gpload, asm: "MOVBU", aux: "SymOff", typ: "UInt8", faultOnNilArg0: true, symEffect: "Read"}, // 8 bits, zero extend
183 {name: "MOVHUload", argLength: 2, reg: gpload, asm: "MOVHU", aux: "SymOff", typ: "UInt16", faultOnNilArg0: true, symEffect: "Read"}, // 16 bits, zero extend
184 {name: "MOVWUload", argLength: 2, reg: gpload, asm: "MOVWU", aux: "SymOff", typ: "UInt32", faultOnNilArg0: true, symEffect: "Read"}, // 32 bits, zero extend
186 // Stores: store <size> lowest bits in arg1 to arg0+auxint+aux; arg2=mem
187 {name: "MOVBstore", argLength: 3, reg: gpstore, asm: "MOVB", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // 8 bits
188 {name: "MOVHstore", argLength: 3, reg: gpstore, asm: "MOVH", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // 16 bits
189 {name: "MOVWstore", argLength: 3, reg: gpstore, asm: "MOVW", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // 32 bits
190 {name: "MOVDstore", argLength: 3, reg: gpstore, asm: "MOV", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // 64 bits
192 // Stores: store <size> of zero in arg0+auxint+aux; arg1=mem
193 {name: "MOVBstorezero", argLength: 2, reg: gpstore0, aux: "SymOff", asm: "MOVB", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // 8 bits
194 {name: "MOVHstorezero", argLength: 2, reg: gpstore0, aux: "SymOff", asm: "MOVH", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // 16 bits
195 {name: "MOVWstorezero", argLength: 2, reg: gpstore0, aux: "SymOff", asm: "MOVW", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // 32 bits
196 {name: "MOVDstorezero", argLength: 2, reg: gpstore0, aux: "SymOff", asm: "MOV", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // 64 bits
199 {name: "MOVBreg", argLength: 1, reg: gp11, asm: "MOVB"}, // move from arg0, sign-extended from byte
200 {name: "MOVHreg", argLength: 1, reg: gp11, asm: "MOVH"}, // move from arg0, sign-extended from half
201 {name: "MOVWreg", argLength: 1, reg: gp11, asm: "MOVW"}, // move from arg0, sign-extended from word
202 {name: "MOVDreg", argLength: 1, reg: gp11, asm: "MOV"}, // move from arg0
203 {name: "MOVBUreg", argLength: 1, reg: gp11, asm: "MOVBU"}, // move from arg0, unsign-extended from byte
204 {name: "MOVHUreg", argLength: 1, reg: gp11, asm: "MOVHU"}, // move from arg0, unsign-extended from half
205 {name: "MOVWUreg", argLength: 1, reg: gp11, asm: "MOVWU"}, // move from arg0, unsign-extended from word
207 {name: "MOVDnop", argLength: 1, reg: regInfo{inputs: []regMask{gpMask}, outputs: []regMask{gpMask}}, resultInArg0: true}, // nop, return arg0 in same register
210 {name: "SLL", argLength: 2, reg: gp21, asm: "SLL"}, // arg0 << (aux1 & 63)
211 {name: "SRA", argLength: 2, reg: gp21, asm: "SRA"}, // arg0 >> (aux1 & 63), signed
212 {name: "SRAW", argLength: 2, reg: gp21, asm: "SRAW"}, // arg0 >> (aux1 & 31), signed
213 {name: "SRL", argLength: 2, reg: gp21, asm: "SRL"}, // arg0 >> (aux1 & 63), unsigned
214 {name: "SRLW", argLength: 2, reg: gp21, asm: "SRLW"}, // arg0 >> (aux1 & 31), unsigned
215 {name: "SLLI", argLength: 1, reg: gp11, asm: "SLLI", aux: "Int64"}, // arg0 << auxint, shift amount 0-63
216 {name: "SRAI", argLength: 1, reg: gp11, asm: "SRAI", aux: "Int64"}, // arg0 >> auxint, signed, shift amount 0-63
217 {name: "SRAIW", argLength: 1, reg: gp11, asm: "SRAIW", aux: "Int64"}, // arg0 >> auxint, signed, shift amount 0-31
218 {name: "SRLI", argLength: 1, reg: gp11, asm: "SRLI", aux: "Int64"}, // arg0 >> auxint, unsigned, shift amount 0-63
219 {name: "SRLIW", argLength: 1, reg: gp11, asm: "SRLIW", aux: "Int64"}, // arg0 >> auxint, unsigned, shift amount 0-31
222 {name: "XOR", argLength: 2, reg: gp21, asm: "XOR", commutative: true}, // arg0 ^ arg1
223 {name: "XORI", argLength: 1, reg: gp11, asm: "XORI", aux: "Int64"}, // arg0 ^ auxint
224 {name: "OR", argLength: 2, reg: gp21, asm: "OR", commutative: true}, // arg0 | arg1
225 {name: "ORI", argLength: 1, reg: gp11, asm: "ORI", aux: "Int64"}, // arg0 | auxint
226 {name: "AND", argLength: 2, reg: gp21, asm: "AND", commutative: true}, // arg0 & arg1
227 {name: "ANDI", argLength: 1, reg: gp11, asm: "ANDI", aux: "Int64"}, // arg0 & auxint
228 {name: "NOT", argLength: 1, reg: gp11, asm: "NOT"}, // ^arg0
230 // Generate boolean values
231 {name: "SEQZ", argLength: 1, reg: gp11, asm: "SEQZ"}, // arg0 == 0, result is 0 or 1
232 {name: "SNEZ", argLength: 1, reg: gp11, asm: "SNEZ"}, // arg0 != 0, result is 0 or 1
233 {name: "SLT", argLength: 2, reg: gp21, asm: "SLT"}, // arg0 < arg1, result is 0 or 1
234 {name: "SLTI", argLength: 1, reg: gp11, asm: "SLTI", aux: "Int64"}, // arg0 < auxint, result is 0 or 1
235 {name: "SLTU", argLength: 2, reg: gp21, asm: "SLTU"}, // arg0 < arg1, unsigned, result is 0 or 1
236 {name: "SLTIU", argLength: 1, reg: gp11, asm: "SLTIU", aux: "Int64"}, // arg0 < auxint, unsigned, result is 0 or 1
238 // Round ops to block fused-multiply-add extraction.
239 {name: "LoweredRound32F", argLength: 1, reg: fp11, resultInArg0: true},
240 {name: "LoweredRound64F", argLength: 1, reg: fp11, resultInArg0: true},
243 {name: "CALLstatic", argLength: -1, reg: call, aux: "CallOff", call: true}, // call static function aux.(*gc.Sym). last arg=mem, auxint=argsize, returns mem
244 {name: "CALLtail", argLength: -1, reg: call, aux: "CallOff", call: true, tailCall: true}, // tail call static function aux.(*gc.Sym). last arg=mem, auxint=argsize, returns mem
245 {name: "CALLclosure", argLength: -1, reg: callClosure, aux: "CallOff", call: true}, // call function via closure. arg0=codeptr, arg1=closure, last arg=mem, auxint=argsize, returns mem
246 {name: "CALLinter", argLength: -1, reg: callInter, aux: "CallOff", call: true}, // call fn by pointer. arg0=codeptr, last arg=mem, auxint=argsize, returns mem
249 // arg0 = address of memory to zero (in X25, changed as side effect)
251 // auxint = offset into duffzero code to start executing
252 // X1 (link register) changed because of function call
259 inputs: []regMask{regNamed["X25"]},
260 clobbers: regNamed["X1"] | regNamed["X25"],
263 faultOnNilArg0: true,
267 // arg0 = address of dst memory (in X25, changed as side effect)
268 // arg1 = address of src memory (in X24, changed as side effect)
270 // auxint = offset into duffcopy code to start executing
271 // X1 (link register) changed because of function call
278 inputs: []regMask{regNamed["X25"], regNamed["X24"]},
279 clobbers: regNamed["X1"] | regNamed["X24"] | regNamed["X25"],
282 faultOnNilArg0: true,
283 faultOnNilArg1: true,
286 // Generic moves and zeros
288 // general unaligned zeroing
289 // arg0 = address of memory to zero (in X5, changed as side effect)
290 // arg1 = address of the last element to zero (inclusive)
292 // auxint = element size
296 // BGEU Rarg1, X5, -2(PC)
302 inputs: []regMask{regNamed["X5"], gpMask},
303 clobbers: regNamed["X5"],
306 faultOnNilArg0: true,
309 // general unaligned move
310 // arg0 = address of dst memory (in X5, changed as side effect)
311 // arg1 = address of src memory (in X6, changed as side effect)
312 // arg2 = address of the last element of src (can't be X7 as we clobber it before using arg2)
314 // auxint = alignment
315 // clobbers X7 as a tmp register.
321 // BGEU Rarg2, X5, -4(PC)
327 inputs: []regMask{regNamed["X5"], regNamed["X6"], gpMask &^ regNamed["X7"]},
328 clobbers: regNamed["X5"] | regNamed["X6"] | regNamed["X7"],
331 faultOnNilArg0: true,
332 faultOnNilArg1: true,
336 // load from arg0. arg1=mem.
337 // returns <value,memory> so they can be properly ordered with other loads.
338 {name: "LoweredAtomicLoad8", argLength: 2, reg: gpload, faultOnNilArg0: true},
339 {name: "LoweredAtomicLoad32", argLength: 2, reg: gpload, faultOnNilArg0: true},
340 {name: "LoweredAtomicLoad64", argLength: 2, reg: gpload, faultOnNilArg0: true},
343 // store arg1 to *arg0. arg2=mem. returns memory.
344 {name: "LoweredAtomicStore8", argLength: 3, reg: gpstore, faultOnNilArg0: true, hasSideEffects: true},
345 {name: "LoweredAtomicStore32", argLength: 3, reg: gpstore, faultOnNilArg0: true, hasSideEffects: true},
346 {name: "LoweredAtomicStore64", argLength: 3, reg: gpstore, faultOnNilArg0: true, hasSideEffects: true},
349 // store arg1 to *arg0. arg2=mem. returns <old content of *arg0, memory>.
350 {name: "LoweredAtomicExchange32", argLength: 3, reg: gpxchg, resultNotInArgs: true, faultOnNilArg0: true, hasSideEffects: true},
351 {name: "LoweredAtomicExchange64", argLength: 3, reg: gpxchg, resultNotInArgs: true, faultOnNilArg0: true, hasSideEffects: true},
354 // *arg0 += arg1. arg2=mem. returns <new content of *arg0, memory>.
355 {name: "LoweredAtomicAdd32", argLength: 3, reg: gpxchg, resultNotInArgs: true, faultOnNilArg0: true, hasSideEffects: true, unsafePoint: true},
356 {name: "LoweredAtomicAdd64", argLength: 3, reg: gpxchg, resultNotInArgs: true, faultOnNilArg0: true, hasSideEffects: true, unsafePoint: true},
358 // Atomic compare and swap.
359 // arg0 = pointer, arg1 = old value, arg2 = new value, arg3 = memory.
360 // if *arg0 == arg1 {
362 // return (true, memory)
364 // return (false, memory)
368 // BNE Rtmp, Rarg1, 3(PC)
369 // SC Rarg2, (Rarg0), Rtmp
370 // BNE Rtmp, ZERO, -3(PC)
372 {name: "LoweredAtomicCas32", argLength: 4, reg: gpcas, resultNotInArgs: true, faultOnNilArg0: true, hasSideEffects: true, unsafePoint: true},
373 {name: "LoweredAtomicCas64", argLength: 4, reg: gpcas, resultNotInArgs: true, faultOnNilArg0: true, hasSideEffects: true, unsafePoint: true},
375 // Atomic 32 bit AND/OR.
376 // *arg0 &= (|=) arg1. arg2=mem. returns nil.
377 {name: "LoweredAtomicAnd32", argLength: 3, reg: gpatomic, asm: "AMOANDW", faultOnNilArg0: true, hasSideEffects: true},
378 {name: "LoweredAtomicOr32", argLength: 3, reg: gpatomic, asm: "AMOORW", faultOnNilArg0: true, hasSideEffects: true},
380 // Lowering pass-throughs
381 {name: "LoweredNilCheck", argLength: 2, faultOnNilArg0: true, nilCheck: true, reg: regInfo{inputs: []regMask{gpspMask}}}, // arg0=ptr,arg1=mem, returns void. Faults if ptr is nil.
382 {name: "LoweredGetClosurePtr", reg: regInfo{outputs: []regMask{regCtxt}}}, // scheduler ensures only at beginning of entry block
384 // LoweredGetCallerSP returns the SP of the caller of the current function. arg0=mem.
385 {name: "LoweredGetCallerSP", argLength: 1, reg: gp01, rematerializeable: true},
387 // LoweredGetCallerPC evaluates to the PC to which its "caller" will return.
388 // I.e., if f calls g "calls" getcallerpc,
389 // the result should be the PC within f that g will return to.
390 // See runtime/stubs.go for a more detailed discussion.
391 {name: "LoweredGetCallerPC", reg: gp01, rematerializeable: true},
393 // LoweredWB invokes runtime.gcWriteBarrier. arg0=mem, auxint=# of buffer entries needed
394 // It saves all GP registers if necessary,
395 // but clobbers RA (LR) because it's a call
397 // Returns a pointer to a write barrier buffer in X24.
398 {name: "LoweredWB", argLength: 1, reg: regInfo{clobbers: (callerSave &^ (gpMask | regNamed["g"])) | regNamed["X1"], outputs: []regMask{regNamed["X24"]}}, clobberFlags: true, aux: "Int64"},
400 // Do data barrier. arg0=memorys
401 {name: "LoweredPubBarrier", argLength: 1, asm: "FENCE", hasSideEffects: true},
403 // There are three of these functions so that they can have three different register inputs.
404 // When we check 0 <= c <= cap (A), then 0 <= b <= c (B), then 0 <= a <= b (C), we want the
405 // default registers to match so we don't need to copy registers around unnecessarily.
406 {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).
407 {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).
408 {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).
411 {name: "FADDS", argLength: 2, reg: fp21, asm: "FADDS", commutative: true, typ: "Float32"}, // arg0 + arg1
412 {name: "FSUBS", argLength: 2, reg: fp21, asm: "FSUBS", commutative: false, typ: "Float32"}, // arg0 - arg1
413 {name: "FMULS", argLength: 2, reg: fp21, asm: "FMULS", commutative: true, typ: "Float32"}, // arg0 * arg1
414 {name: "FDIVS", argLength: 2, reg: fp21, asm: "FDIVS", commutative: false, typ: "Float32"}, // arg0 / arg1
415 {name: "FMADDS", argLength: 3, reg: fp31, asm: "FMADDS", commutative: true, typ: "Float32"}, // (arg0 * arg1) + arg2
416 {name: "FMSUBS", argLength: 3, reg: fp31, asm: "FMSUBS", commutative: true, typ: "Float32"}, // (arg0 * arg1) - arg2
417 {name: "FNMADDS", argLength: 3, reg: fp31, asm: "FNMADDS", commutative: true, typ: "Float32"}, // -(arg0 * arg1) + arg2
418 {name: "FNMSUBS", argLength: 3, reg: fp31, asm: "FNMSUBS", commutative: true, typ: "Float32"}, // -(arg0 * arg1) - arg2
419 {name: "FSQRTS", argLength: 1, reg: fp11, asm: "FSQRTS", typ: "Float32"}, // sqrt(arg0)
420 {name: "FNEGS", argLength: 1, reg: fp11, asm: "FNEGS", typ: "Float32"}, // -arg0
421 {name: "FMVSX", argLength: 1, reg: gpfp, asm: "FMVSX", typ: "Float32"}, // reinterpret arg0 as float
422 {name: "FCVTSW", argLength: 1, reg: gpfp, asm: "FCVTSW", typ: "Float32"}, // float32(low 32 bits of arg0)
423 {name: "FCVTSL", argLength: 1, reg: gpfp, asm: "FCVTSL", typ: "Float32"}, // float32(arg0)
424 {name: "FCVTWS", argLength: 1, reg: fpgp, asm: "FCVTWS", typ: "Int32"}, // int32(arg0)
425 {name: "FCVTLS", argLength: 1, reg: fpgp, asm: "FCVTLS", typ: "Int64"}, // int64(arg0)
426 {name: "FMOVWload", argLength: 2, reg: fpload, asm: "MOVF", aux: "SymOff", typ: "Float32", faultOnNilArg0: true, symEffect: "Read"}, // load float32 from arg0+auxint+aux
427 {name: "FMOVWstore", argLength: 3, reg: fpstore, asm: "MOVF", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // store float32 to arg0+auxint+aux
428 {name: "FEQS", argLength: 2, reg: fp2gp, asm: "FEQS", commutative: true}, // arg0 == arg1
429 {name: "FNES", argLength: 2, reg: fp2gp, asm: "FNES", commutative: true}, // arg0 != arg1
430 {name: "FLTS", argLength: 2, reg: fp2gp, asm: "FLTS"}, // arg0 < arg1
431 {name: "FLES", argLength: 2, reg: fp2gp, asm: "FLES"}, // arg0 <= arg1
434 {name: "FADDD", argLength: 2, reg: fp21, asm: "FADDD", commutative: true, typ: "Float64"}, // arg0 + arg1
435 {name: "FSUBD", argLength: 2, reg: fp21, asm: "FSUBD", commutative: false, typ: "Float64"}, // arg0 - arg1
436 {name: "FMULD", argLength: 2, reg: fp21, asm: "FMULD", commutative: true, typ: "Float64"}, // arg0 * arg1
437 {name: "FDIVD", argLength: 2, reg: fp21, asm: "FDIVD", commutative: false, typ: "Float64"}, // arg0 / arg1
438 {name: "FMADDD", argLength: 3, reg: fp31, asm: "FMADDD", commutative: true, typ: "Float64"}, // (arg0 * arg1) + arg2
439 {name: "FMSUBD", argLength: 3, reg: fp31, asm: "FMSUBD", commutative: true, typ: "Float64"}, // (arg0 * arg1) - arg2
440 {name: "FNMADDD", argLength: 3, reg: fp31, asm: "FNMADDD", commutative: true, typ: "Float64"}, // -(arg0 * arg1) + arg2
441 {name: "FNMSUBD", argLength: 3, reg: fp31, asm: "FNMSUBD", commutative: true, typ: "Float64"}, // -(arg0 * arg1) - arg2
442 {name: "FSQRTD", argLength: 1, reg: fp11, asm: "FSQRTD", typ: "Float64"}, // sqrt(arg0)
443 {name: "FNEGD", argLength: 1, reg: fp11, asm: "FNEGD", typ: "Float64"}, // -arg0
444 {name: "FABSD", argLength: 1, reg: fp11, asm: "FABSD", typ: "Float64"}, // abs(arg0)
445 {name: "FSGNJD", argLength: 2, reg: fp21, asm: "FSGNJD", typ: "Float64"}, // copy sign of arg1 to arg0
446 {name: "FMVDX", argLength: 1, reg: gpfp, asm: "FMVDX", typ: "Float64"}, // reinterpret arg0 as float
447 {name: "FCVTDW", argLength: 1, reg: gpfp, asm: "FCVTDW", typ: "Float64"}, // float64(low 32 bits of arg0)
448 {name: "FCVTDL", argLength: 1, reg: gpfp, asm: "FCVTDL", typ: "Float64"}, // float64(arg0)
449 {name: "FCVTWD", argLength: 1, reg: fpgp, asm: "FCVTWD", typ: "Int32"}, // int32(arg0)
450 {name: "FCVTLD", argLength: 1, reg: fpgp, asm: "FCVTLD", typ: "Int64"}, // int64(arg0)
451 {name: "FCVTDS", argLength: 1, reg: fp11, asm: "FCVTDS", typ: "Float64"}, // float64(arg0)
452 {name: "FCVTSD", argLength: 1, reg: fp11, asm: "FCVTSD", typ: "Float32"}, // float32(arg0)
453 {name: "FMOVDload", argLength: 2, reg: fpload, asm: "MOVD", aux: "SymOff", typ: "Float64", faultOnNilArg0: true, symEffect: "Read"}, // load float64 from arg0+auxint+aux
454 {name: "FMOVDstore", argLength: 3, reg: fpstore, asm: "MOVD", aux: "SymOff", typ: "Mem", faultOnNilArg0: true, symEffect: "Write"}, // store float6 to arg0+auxint+aux
455 {name: "FEQD", argLength: 2, reg: fp2gp, asm: "FEQD", commutative: true}, // arg0 == arg1
456 {name: "FNED", argLength: 2, reg: fp2gp, asm: "FNED", commutative: true}, // arg0 != arg1
457 {name: "FLTD", argLength: 2, reg: fp2gp, asm: "FLTD"}, // arg0 < arg1
458 {name: "FLED", argLength: 2, reg: fp2gp, asm: "FLED"}, // arg0 <= arg1
461 RISCV64blocks := []blockData{
462 {name: "BEQ", controls: 2},
463 {name: "BNE", controls: 2},
464 {name: "BLT", controls: 2},
465 {name: "BGE", controls: 2},
466 {name: "BLTU", controls: 2},
467 {name: "BGEU", controls: 2},
469 {name: "BEQZ", controls: 1},
470 {name: "BNEZ", controls: 1},
471 {name: "BLEZ", controls: 1},
472 {name: "BGEZ", controls: 1},
473 {name: "BLTZ", controls: 1},
474 {name: "BGTZ", controls: 1},
477 archs = append(archs, arch{
479 pkg: "cmd/internal/obj/riscv",
480 genfile: "../../riscv64/ssa.go",
482 blocks: RISCV64blocks,
483 regnames: regNamesRISCV64,
486 framepointerreg: -1, // not used
487 // Integer parameters passed in register X10-X17, X8-X9, X18-X23
488 ParamIntRegNames: "X10 X11 X12 X13 X14 X15 X16 X17 X8 X9 X18 X19 X20 X21 X22 X23",
489 // Float parameters passed in register F10-F17, F8-F9, F18-F23
490 ParamFloatRegNames: "F10 F11 F12 F13 F14 F15 F16 F17 F8 F9 F18 F19 F20 F21 F22 F23",