1 //===- MipsInstrFPU.td - Mips FPU Instruction Information --*- tablegen -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file describes the Mips FPU instruction set.
12 //===----------------------------------------------------------------------===//
14 //===----------------------------------------------------------------------===//
15 // Floating Point Instructions
16 // ------------------------
18 // - 32 64-bit registers (default mode)
19 // - 16 even 32-bit registers (32-bit compatible mode) for
20 // single and double access.
22 // - 16 even 32-bit registers - single and double (aliased)
23 // - 32 32-bit registers (within single-only mode)
24 //===----------------------------------------------------------------------===//
26 // Floating Point Compare and Branch
27 def SDT_MipsFPBrcond : SDTypeProfile<0, 2, [SDTCisInt<0>,
28 SDTCisVT<1, OtherVT>]>;
29 def SDT_MipsFPCmp : SDTypeProfile<0, 3, [SDTCisSameAs<0, 1>, SDTCisFP<1>,
31 def SDT_MipsCMovFP : SDTypeProfile<1, 2, [SDTCisSameAs<0, 1>,
33 def SDT_MipsBuildPairF64 : SDTypeProfile<1, 2, [SDTCisVT<0, f64>,
36 def SDT_MipsExtractElementF64 : SDTypeProfile<1, 2, [SDTCisVT<0, i32>,
40 def MipsFPCmp : SDNode<"MipsISD::FPCmp", SDT_MipsFPCmp, [SDNPOutGlue]>;
41 def MipsCMovFP_T : SDNode<"MipsISD::CMovFP_T", SDT_MipsCMovFP, [SDNPInGlue]>;
42 def MipsCMovFP_F : SDNode<"MipsISD::CMovFP_F", SDT_MipsCMovFP, [SDNPInGlue]>;
43 def MipsFPBrcond : SDNode<"MipsISD::FPBrcond", SDT_MipsFPBrcond,
44 [SDNPHasChain, SDNPOptInGlue]>;
45 def MipsBuildPairF64 : SDNode<"MipsISD::BuildPairF64", SDT_MipsBuildPairF64>;
46 def MipsExtractElementF64 : SDNode<"MipsISD::ExtractElementF64",
47 SDT_MipsExtractElementF64>;
49 // Operand for printing out a condition code.
50 let PrintMethod = "printFCCOperand" in
51 def condcode : Operand<i32>;
53 //===----------------------------------------------------------------------===//
54 // Feature predicates.
55 //===----------------------------------------------------------------------===//
57 def IsFP64bit : Predicate<"Subtarget.isFP64bit()">;
58 def NotFP64bit : Predicate<"!Subtarget.isFP64bit()">;
59 def IsSingleFloat : Predicate<"Subtarget.isSingleFloat()">;
60 def IsNotSingleFloat : Predicate<"!Subtarget.isSingleFloat()">;
62 //===----------------------------------------------------------------------===//
63 // Instruction Class Templates
65 // A set of multiclasses is used to address the register usage.
67 // S32 - single precision in 16 32bit even fp registers
68 // single precision in 32 32bit fp registers in SingleOnly mode
69 // S64 - single precision in 32 64bit fp registers (In64BitMode)
70 // D32 - double precision in 16 32bit even fp registers
71 // D64 - double precision in 32 64bit fp registers (In64BitMode)
73 // Only S32 and D32 are supported right now.
74 //===----------------------------------------------------------------------===//
76 multiclass FFR1_1<bits<6> funct, string asmstr>
78 def _S32 : FFR<0x11, funct, 0x0, (outs FGR32:$fd), (ins FGR32:$fs),
79 !strconcat(asmstr, ".s\t$fd, $fs"), []>;
81 def _D32 : FFR<0x11, funct, 0x1, (outs FGR32:$fd), (ins AFGR64:$fs),
82 !strconcat(asmstr, ".d\t$fd, $fs"), []>, Requires<[NotFP64bit]>;
85 multiclass FFR1_2<bits<6> funct, string asmstr, SDNode FOp>
87 def _S32 : FFR<0x11, funct, 0x0, (outs FGR32:$fd), (ins FGR32:$fs),
88 !strconcat(asmstr, ".s\t$fd, $fs"),
89 [(set FGR32:$fd, (FOp FGR32:$fs))]>;
91 def _D32 : FFR<0x11, funct, 0x1, (outs AFGR64:$fd), (ins AFGR64:$fs),
92 !strconcat(asmstr, ".d\t$fd, $fs"),
93 [(set AFGR64:$fd, (FOp AFGR64:$fs))]>, Requires<[NotFP64bit]>;
96 class FFR1_3<bits<6> funct, bits<5> fmt, RegisterClass RcSrc,
97 RegisterClass RcDst, string asmstr>:
98 FFR<0x11, funct, fmt, (outs RcSrc:$fd), (ins RcDst:$fs),
99 !strconcat(asmstr, "\t$fd, $fs"), []>;
102 multiclass FFR1_4<bits<6> funct, string asmstr, SDNode FOp, bit isComm = 0> {
103 let isCommutable = isComm in {
104 def _S32 : FFR<0x11, funct, 0x0, (outs FGR32:$fd),
105 (ins FGR32:$fs, FGR32:$ft),
106 !strconcat(asmstr, ".s\t$fd, $fs, $ft"),
107 [(set FGR32:$fd, (FOp FGR32:$fs, FGR32:$ft))]>;
109 def _D32 : FFR<0x11, funct, 0x1, (outs AFGR64:$fd),
110 (ins AFGR64:$fs, AFGR64:$ft),
111 !strconcat(asmstr, ".d\t$fd, $fs, $ft"),
112 [(set AFGR64:$fd, (FOp AFGR64:$fs, AFGR64:$ft))]>,
113 Requires<[NotFP64bit]>;
117 //===----------------------------------------------------------------------===//
118 // Floating Point Instructions
119 //===----------------------------------------------------------------------===//
122 defm FLOOR_W : FFR1_1<0b001111, "floor.w">;
123 defm CEIL_W : FFR1_1<0b001110, "ceil.w">;
124 defm ROUND_W : FFR1_1<0b001100, "round.w">;
125 defm TRUNC_W : FFR1_1<0b001101, "trunc.w">;
126 defm CVTW : FFR1_1<0b100100, "cvt.w">;
128 defm FABS : FFR1_2<0b000101, "abs", fabs>;
129 defm FNEG : FFR1_2<0b000111, "neg", fneg>;
130 defm FSQRT : FFR1_2<0b000100, "sqrt", fsqrt>;
132 /// Convert to Single Precison
133 def CVTS_W32 : FFR1_3<0b100000, 0x2, FGR32, FGR32, "cvt.s.w">;
135 let Predicates = [IsNotSingleFloat] in {
136 /// Ceil to long signed integer
137 def CEIL_LS : FFR1_3<0b001010, 0x0, FGR32, FGR32, "ceil.l">;
138 def CEIL_LD : FFR1_3<0b001010, 0x1, AFGR64, AFGR64, "ceil.l">;
140 /// Round to long signed integer
141 def ROUND_LS : FFR1_3<0b001000, 0x0, FGR32, FGR32, "round.l">;
142 def ROUND_LD : FFR1_3<0b001000, 0x1, AFGR64, AFGR64, "round.l">;
144 /// Floor to long signed integer
145 def FLOOR_LS : FFR1_3<0b001011, 0x0, FGR32, FGR32, "floor.l">;
146 def FLOOR_LD : FFR1_3<0b001011, 0x1, AFGR64, AFGR64, "floor.l">;
148 /// Trunc to long signed integer
149 def TRUNC_LS : FFR1_3<0b001001, 0x0, FGR32, FGR32, "trunc.l">;
150 def TRUNC_LD : FFR1_3<0b001001, 0x1, AFGR64, AFGR64, "trunc.l">;
152 /// Convert to long signed integer
153 def CVTL_S : FFR1_3<0b100101, 0x0, FGR32, FGR32, "cvt.l">;
154 def CVTL_D : FFR1_3<0b100101, 0x1, AFGR64, AFGR64, "cvt.l">;
156 /// Convert to Double Precison
157 def CVTD_S32 : FFR1_3<0b100001, 0x0, AFGR64, FGR32, "cvt.d.s">;
158 def CVTD_W32 : FFR1_3<0b100001, 0x2, AFGR64, FGR32, "cvt.d.w">;
159 def CVTD_L32 : FFR1_3<0b100001, 0x3, AFGR64, AFGR64, "cvt.d.l">;
161 /// Convert to Single Precison
162 def CVTS_D32 : FFR1_3<0b100000, 0x1, FGR32, AFGR64, "cvt.s.d">;
163 def CVTS_L32 : FFR1_3<0b100000, 0x3, FGR32, AFGR64, "cvt.s.l">;
167 // The odd-numbered registers are only referenced when doing loads,
168 // stores, and moves between floating-point and integer registers.
169 // When defining instructions, we reference all 32-bit registers,
170 // regardless of register aliasing.
172 /// Move Control Registers From/To CPU Registers
173 def CFC1 : FFR<0x11, 0x0, 0x2, (outs CPURegs:$rt), (ins CCR:$fs),
174 "cfc1\t$rt, $fs", []>;
176 def CTC1 : FFR<0x11, 0x0, 0x6, (outs CCR:$rt), (ins CPURegs:$fs),
177 "ctc1\t$fs, $rt", []>;
179 def MFC1 : FFR<0x11, 0x00, 0x00, (outs CPURegs:$rt), (ins FGR32:$fs),
181 [(set CPURegs:$rt, (bitconvert FGR32:$fs))]>;
183 def MTC1 : FFR<0x11, 0x00, 0x04, (outs FGR32:$fs), (ins CPURegs:$rt),
185 [(set FGR32:$fs, (bitconvert CPURegs:$rt))]>;
188 def FMOV_S32 : FFR<0x11, 0b000110, 0x0, (outs FGR32:$fd), (ins FGR32:$fs),
189 "mov.s\t$fd, $fs", []>;
190 def FMOV_D32 : FFR<0x11, 0b000110, 0x1, (outs AFGR64:$fd), (ins AFGR64:$fs),
191 "mov.d\t$fd, $fs", []>;
193 /// Floating Point Memory Instructions
194 let Predicates = [IsNotSingleFloat] in {
195 def LDC1 : FFI<0b110101, (outs AFGR64:$ft), (ins mem:$addr),
196 "ldc1\t$ft, $addr", [(set AFGR64:$ft, (load addr:$addr))]>;
198 def SDC1 : FFI<0b111101, (outs), (ins AFGR64:$ft, mem:$addr),
199 "sdc1\t$ft, $addr", [(store AFGR64:$ft, addr:$addr)]>;
202 // LWC1 and SWC1 can always be emitted with odd registers.
203 def LWC1 : FFI<0b110001, (outs FGR32:$ft), (ins mem:$addr), "lwc1\t$ft, $addr",
204 [(set FGR32:$ft, (load addr:$addr))]>;
205 def SWC1 : FFI<0b111001, (outs), (ins FGR32:$ft, mem:$addr),
206 "swc1\t$ft, $addr", [(store FGR32:$ft, addr:$addr)]>;
208 /// Floating-point Aritmetic
209 defm FADD : FFR1_4<0x10, "add", fadd, 1>;
210 defm FDIV : FFR1_4<0x03, "div", fdiv>;
211 defm FMUL : FFR1_4<0x02, "mul", fmul, 1>;
212 defm FSUB : FFR1_4<0x01, "sub", fsub>;
214 //===----------------------------------------------------------------------===//
215 // Floating Point Branch Codes
216 //===----------------------------------------------------------------------===//
217 // Mips branch codes. These correspond to condcode in MipsInstrInfo.h.
218 // They must be kept in synch.
219 def MIPS_BRANCH_F : PatLeaf<(i32 0)>;
220 def MIPS_BRANCH_T : PatLeaf<(i32 1)>;
222 /// Floating Point Branch of False/True (Likely)
223 let isBranch=1, isTerminator=1, hasDelaySlot=1, base=0x8, Uses=[FCR31] in
224 class FBRANCH<PatLeaf op, string asmstr> : FFI<0x11, (outs),
225 (ins brtarget:$dst), !strconcat(asmstr, "\t$dst"),
226 [(MipsFPBrcond op, bb:$dst)]>;
228 def BC1F : FBRANCH<MIPS_BRANCH_F, "bc1f">;
229 def BC1T : FBRANCH<MIPS_BRANCH_T, "bc1t">;
231 //===----------------------------------------------------------------------===//
232 // Floating Point Flag Conditions
233 //===----------------------------------------------------------------------===//
234 // Mips condition codes. They must correspond to condcode in MipsInstrInfo.h.
235 // They must be kept in synch.
236 def MIPS_FCOND_F : PatLeaf<(i32 0)>;
237 def MIPS_FCOND_UN : PatLeaf<(i32 1)>;
238 def MIPS_FCOND_OEQ : PatLeaf<(i32 2)>;
239 def MIPS_FCOND_UEQ : PatLeaf<(i32 3)>;
240 def MIPS_FCOND_OLT : PatLeaf<(i32 4)>;
241 def MIPS_FCOND_ULT : PatLeaf<(i32 5)>;
242 def MIPS_FCOND_OLE : PatLeaf<(i32 6)>;
243 def MIPS_FCOND_ULE : PatLeaf<(i32 7)>;
244 def MIPS_FCOND_SF : PatLeaf<(i32 8)>;
245 def MIPS_FCOND_NGLE : PatLeaf<(i32 9)>;
246 def MIPS_FCOND_SEQ : PatLeaf<(i32 10)>;
247 def MIPS_FCOND_NGL : PatLeaf<(i32 11)>;
248 def MIPS_FCOND_LT : PatLeaf<(i32 12)>;
249 def MIPS_FCOND_NGE : PatLeaf<(i32 13)>;
250 def MIPS_FCOND_LE : PatLeaf<(i32 14)>;
251 def MIPS_FCOND_NGT : PatLeaf<(i32 15)>;
253 /// Floating Point Compare
254 let Defs=[FCR31] in {
255 def FCMP_S32 : FCC<0x0, (outs), (ins FGR32:$fs, FGR32:$ft, condcode:$cc),
257 [(MipsFPCmp FGR32:$fs, FGR32:$ft, imm:$cc)]>;
259 def FCMP_D32 : FCC<0x1, (outs), (ins AFGR64:$fs, AFGR64:$ft, condcode:$cc),
261 [(MipsFPCmp AFGR64:$fs, AFGR64:$ft, imm:$cc)]>,
262 Requires<[NotFP64bit]>;
266 // Conditional moves:
267 // These instructions are expanded in
268 // MipsISelLowering::EmitInstrWithCustomInserter if target does not have
269 // conditional move instructions.
270 // flag:int, data:float
271 let usesCustomInserter = 1, Constraints = "$F = $dst" in
272 class CondMovIntFP<RegisterClass RC, bits<5> fmt, bits<6> func,
274 FFR<0x11, func, fmt, (outs RC:$dst), (ins RC:$T, CPURegs:$cond, RC:$F),
275 !strconcat(instr_asm, "\t$dst, $T, $cond"), []>;
277 def MOVZ_S : CondMovIntFP<FGR32, 16, 18, "movz.s">;
278 def MOVN_S : CondMovIntFP<FGR32, 16, 19, "movn.s">;
280 let Predicates = [NotFP64bit] in {
281 def MOVZ_D : CondMovIntFP<AFGR64, 17, 18, "movz.d">;
282 def MOVN_D : CondMovIntFP<AFGR64, 17, 19, "movn.d">;
285 defm : MovzPats<FGR32, MOVZ_S>;
286 defm : MovnPats<FGR32, MOVN_S>;
288 let Predicates = [NotFP64bit] in {
289 defm : MovzPats<AFGR64, MOVZ_D>;
290 defm : MovnPats<AFGR64, MOVN_D>;
293 let usesCustomInserter = 1, Uses = [FCR31], Constraints = "$F = $dst" in {
294 // flag:float, data:int
295 class CondMovFPInt<SDNode cmov, bits<1> tf, string instr_asm> :
296 FCMOV<tf, (outs CPURegs:$dst), (ins CPURegs:$T, CPURegs:$F),
297 !strconcat(instr_asm, "\t$dst, $T, $$fcc0"),
298 [(set CPURegs:$dst, (cmov CPURegs:$T, CPURegs:$F))]>;
300 // flag:float, data:float
301 class CondMovFPFP<RegisterClass RC, SDNode cmov, bits<5> fmt, bits<1> tf,
303 FFCMOV<fmt, tf, (outs RC:$dst), (ins RC:$T, RC:$F),
304 !strconcat(instr_asm, "\t$dst, $T, $$fcc0"),
305 [(set RC:$dst, (cmov RC:$T, RC:$F))]>;
308 def MOVT : CondMovFPInt<MipsCMovFP_T, 1, "movt">;
309 def MOVF : CondMovFPInt<MipsCMovFP_F, 0, "movf">;
310 def MOVT_S : CondMovFPFP<FGR32, MipsCMovFP_T, 16, 1, "movt.s">;
311 def MOVF_S : CondMovFPFP<FGR32, MipsCMovFP_F, 16, 0, "movf.s">;
313 let Predicates = [NotFP64bit] in {
314 def MOVT_D : CondMovFPFP<AFGR64, MipsCMovFP_T, 17, 1, "movt.d">;
315 def MOVF_D : CondMovFPFP<AFGR64, MipsCMovFP_F, 17, 0, "movf.d">;
318 //===----------------------------------------------------------------------===//
319 // Floating Point Pseudo-Instructions
320 //===----------------------------------------------------------------------===//
321 def MOVCCRToCCR : MipsPseudo<(outs CCR:$dst), (ins CCR:$src),
322 "# MOVCCRToCCR", []>;
324 // This pseudo instr gets expanded into 2 mtc1 instrs after register
327 MipsPseudo<(outs AFGR64:$dst),
328 (ins CPURegs:$lo, CPURegs:$hi), "",
329 [(set AFGR64:$dst, (MipsBuildPairF64 CPURegs:$lo, CPURegs:$hi))]>;
331 // This pseudo instr gets expanded into 2 mfc1 instrs after register
333 // if n is 0, lower part of src is extracted.
334 // if n is 1, higher part of src is extracted.
335 def ExtractElementF64 :
336 MipsPseudo<(outs CPURegs:$dst),
337 (ins AFGR64:$src, i32imm:$n), "",
339 (MipsExtractElementF64 AFGR64:$src, imm:$n))]>;
341 //===----------------------------------------------------------------------===//
342 // Floating Point Patterns
343 //===----------------------------------------------------------------------===//
344 def fpimm0 : PatLeaf<(fpimm), [{
345 return N->isExactlyValue(+0.0);
348 def fpimm0neg : PatLeaf<(fpimm), [{
349 return N->isExactlyValue(-0.0);
352 def : Pat<(f32 fpimm0), (MTC1 ZERO)>;
353 def : Pat<(f32 fpimm0neg), (FNEG_S32 (MTC1 ZERO))>;
355 def : Pat<(f32 (sint_to_fp CPURegs:$src)), (CVTS_W32 (MTC1 CPURegs:$src))>;
356 def : Pat<(f64 (sint_to_fp CPURegs:$src)), (CVTD_W32 (MTC1 CPURegs:$src))>;
358 def : Pat<(i32 (fp_to_sint FGR32:$src)), (MFC1 (TRUNC_W_S32 FGR32:$src))>;
359 def : Pat<(i32 (fp_to_sint AFGR64:$src)), (MFC1 (TRUNC_W_D32 AFGR64:$src))>;
361 let Predicates = [NotFP64bit] in {
362 def : Pat<(f32 (fround AFGR64:$src)), (CVTS_D32 AFGR64:$src)>;
363 def : Pat<(f64 (fextend FGR32:$src)), (CVTD_S32 FGR32:$src)>;