// FMA3 - Intel 3 operand Fused Multiply-Add instructions
//===----------------------------------------------------------------------===//
-let Constraints = "$src1 = $dst" in {
+// For all FMA opcodes declared in fma3p_rm and fma3s_rm milticlasses defined
+// below, both the register and memory variants are commutable.
+// For the register form the commutable operands are 1, 2 and 3.
+// For the memory variant the folded operand must be in 3. Thus,
+// in that case, only the operands 1 and 2 can be swapped.
+// Commuting some of operands may require the opcode change.
+// FMA*213*:
+// operands 1 and 2 (memory & register forms): *213* --> *213*(no changes);
+// operands 1 and 3 (register forms only): *213* --> *231*;
+// operands 2 and 3 (register forms only): *213* --> *132*.
+// FMA*132*:
+// operands 1 and 2 (memory & register forms): *132* --> *231*;
+// operands 1 and 3 (register forms only): *132* --> *132*(no changes);
+// operands 2 and 3 (register forms only): *132* --> *213*.
+// FMA*231*:
+// operands 1 and 2 (memory & register forms): *231* --> *132*;
+// operands 1 and 3 (register forms only): *231* --> *213*;
+// operands 2 and 3 (register forms only): *231* --> *231*(no changes).
+
+let Constraints = "$src1 = $dst", hasSideEffects = 0, isCommutable = 1 in
multiclass fma3p_rm<bits<8> opc, string OpcodeStr,
PatFrag MemFrag128, PatFrag MemFrag256,
ValueType OpVT128, ValueType OpVT256,
SDPatternOperator Op = null_frag> {
- let isCommutable = 1 in
+ let usesCustomInserter = 1 in
def r : FMA3<opc, MRMSrcReg, (outs VR128:$dst),
(ins VR128:$src1, VR128:$src2, VR128:$src3),
!strconcat(OpcodeStr,
[(set VR128:$dst, (OpVT128 (Op VR128:$src2, VR128:$src1,
(MemFrag128 addr:$src3))))]>;
- let isCommutable = 1 in
+ let usesCustomInserter = 1 in
def rY : FMA3<opc, MRMSrcReg, (outs VR256:$dst),
(ins VR256:$src1, VR256:$src2, VR256:$src3),
!strconcat(OpcodeStr,
(OpVT256 (Op VR256:$src2, VR256:$src1,
(MemFrag256 addr:$src3))))]>, VEX_L;
}
-} // Constraints = "$src1 = $dst"
multiclass fma3p_forms<bits<8> opc132, bits<8> opc213, bits<8> opc231,
string OpcodeStr, string PackTy,
defm r213 : fma3p_rm<opc213,
!strconcat(OpcodeStr, "213", PackTy),
MemFrag128, MemFrag256, OpTy128, OpTy256, Op>;
-let neverHasSideEffects = 1 in {
defm r132 : fma3p_rm<opc132,
!strconcat(OpcodeStr, "132", PackTy),
MemFrag128, MemFrag256, OpTy128, OpTy256>;
defm r231 : fma3p_rm<opc231,
!strconcat(OpcodeStr, "231", PackTy),
MemFrag128, MemFrag256, OpTy128, OpTy256>;
-} // neverHasSideEffects = 1
}
// Fused Multiply-Add
v4f64>, VEX_W;
}
-let Constraints = "$src1 = $dst" in {
-multiclass fma3s_rm<bits<8> opc, string OpcodeStr, X86MemOperand x86memop,
- RegisterClass RC, ValueType OpVT, PatFrag mem_frag,
+// All source register operands of FMA opcodes defined in fma3s_rm multiclass
+// can be commuted. In many cases such commute transformation requres an opcode
+// adjustment, for example, commuting the operands 1 and 2 in FMA*132 form
+// would require an opcode change to FMA*231:
+// FMA*132* reg1, reg2, reg3; // reg1 * reg3 + reg2;
+// -->
+// FMA*231* reg2, reg1, reg3; // reg1 * reg3 + reg2;
+// Please see more detailed comment at the very beginning of the section
+// defining FMA3 opcodes above.
+let Constraints = "$src1 = $dst", isCommutable = 1, hasSideEffects = 0 in
+multiclass fma3s_rm<bits<8> opc, string OpcodeStr,
+ X86MemOperand x86memop, RegisterClass RC,
SDPatternOperator OpNode = null_frag> {
- let isCommutable = 1 in
+ let usesCustomInserter = 1 in
def r : FMA3<opc, MRMSrcReg, (outs RC:$dst),
(ins RC:$src1, RC:$src2, RC:$src3),
!strconcat(OpcodeStr,
"\t{$src3, $src2, $dst|$dst, $src2, $src3}"),
- [(set RC:$dst,
- (OpVT (OpNode RC:$src2, RC:$src1, RC:$src3)))]>;
+ [(set RC:$dst, (OpNode RC:$src2, RC:$src1, RC:$src3))]>;
+
let mayLoad = 1 in
def m : FMA3<opc, MRMSrcMem, (outs RC:$dst),
(ins RC:$src1, RC:$src2, x86memop:$src3),
!strconcat(OpcodeStr,
"\t{$src3, $src2, $dst|$dst, $src2, $src3}"),
[(set RC:$dst,
- (OpVT (OpNode RC:$src2, RC:$src1,
- (mem_frag addr:$src3))))]>;
+ (OpNode RC:$src2, RC:$src1, (load addr:$src3)))]>;
}
-multiclass fma3s_rm_int<bits<8> opc, string OpcodeStr, Operand memop,
- ComplexPattern mem_cpat, Intrinsic IntId,
- RegisterClass RC> {
- let isCommutable = 1 in
- def r_Int : FMA3<opc, MRMSrcReg, (outs VR128:$dst),
- (ins VR128:$src1, VR128:$src2, VR128:$src3),
+// These FMA*_Int instructions are defined specially for being used when
+// the scalar FMA intrinsics are lowered to machine instructions, and in that
+// sense, they are similar to existing ADD*_Int, SUB*_Int, MUL*_Int, etc.
+// instructions.
+//
+// All of the FMA*_Int opcodes are defined as commutable here.
+// Commuting the 2nd and 3rd source register operands of FMAs is quite trivial
+// and the corresponding optimizations have been developed.
+// Commuting the 1st operand of FMA*_Int requires some additional analysis,
+// the commute optimization is legal only if all users of FMA*_Int use only
+// the lowest element of the FMA*_Int instruction. Even though such analysis
+// may be not implemented yet we allow the routines doing the actual commute
+// transformation to decide if one or another instruction is commutable or not.
+let Constraints = "$src1 = $dst", isCommutable = 1, isCodeGenOnly = 1,
+ hasSideEffects = 0 in
+multiclass fma3s_rm_int<bits<8> opc, string OpcodeStr,
+ Operand memopr, RegisterClass RC> {
+ def r_Int : FMA3<opc, MRMSrcReg, (outs RC:$dst),
+ (ins RC:$src1, RC:$src2, RC:$src3),
!strconcat(OpcodeStr,
"\t{$src3, $src2, $dst|$dst, $src2, $src3}"),
- [(set VR128:$dst, (IntId VR128:$src2, VR128:$src1,
- VR128:$src3))]>;
- def m_Int : FMA3<opc, MRMSrcMem, (outs VR128:$dst),
- (ins VR128:$src1, VR128:$src2, memop:$src3),
+ []>;
+
+ let mayLoad = 1 in
+ def m_Int : FMA3<opc, MRMSrcMem, (outs RC:$dst),
+ (ins RC:$src1, RC:$src2, memopr:$src3),
!strconcat(OpcodeStr,
"\t{$src3, $src2, $dst|$dst, $src2, $src3}"),
- [(set VR128:$dst,
- (IntId VR128:$src2, VR128:$src1, mem_cpat:$src3))]>;
+ []>;
}
-} // Constraints = "$src1 = $dst"
multiclass fma3s_forms<bits<8> opc132, bits<8> opc213, bits<8> opc231,
- string OpStr, string PackTy, Intrinsic Int,
- SDNode OpNode, RegisterClass RC, ValueType OpVT,
- X86MemOperand x86memop, Operand memop, PatFrag mem_frag,
- ComplexPattern mem_cpat> {
-let neverHasSideEffects = 1 in {
- defm r132 : fma3s_rm<opc132, !strconcat(OpStr, "132", PackTy),
- x86memop, RC, OpVT, mem_frag>;
- defm r231 : fma3s_rm<opc231, !strconcat(OpStr, "231", PackTy),
- x86memop, RC, OpVT, mem_frag>;
+ string OpStr, string PackTy,
+ SDNode OpNode, RegisterClass RC,
+ X86MemOperand x86memop> {
+ defm r132 : fma3s_rm<opc132, !strconcat(OpStr, "132", PackTy), x86memop, RC>;
+ defm r213 : fma3s_rm<opc213, !strconcat(OpStr, "213", PackTy), x86memop, RC,
+ OpNode>;
+ defm r231 : fma3s_rm<opc231, !strconcat(OpStr, "231", PackTy), x86memop, RC>;
}
-defm r213 : fma3s_rm<opc213, !strconcat(OpStr, "213", PackTy),
- x86memop, RC, OpVT, mem_frag, OpNode>,
- fma3s_rm_int<opc213, !strconcat(OpStr, "213", PackTy),
- memop, mem_cpat, Int, RC>;
+// The FMA 213 form is created for lowering of scalar FMA intrinscis
+// to machine instructions.
+// The FMA 132 form can trivially be get by commuting the 2nd and 3rd operands
+// of FMA 213 form.
+// The FMA 231 form can be get only by commuting the 1st operand of 213 or 132
+// forms and is possible only after special analysis of all uses of the initial
+// instruction. Such analysis do not exist yet and thus introducing the 231
+// form of FMA*_Int instructions is done using an optimistic assumption that
+// such analysis will be implemented eventually.
+multiclass fma3s_int_forms<bits<8> opc132, bits<8> opc213, bits<8> opc231,
+ string OpStr, string PackTy,
+ RegisterClass RC, Operand memop> {
+ defm r132 : fma3s_rm_int<opc132, !strconcat(OpStr, "132", PackTy),
+ memop, RC>;
+ defm r213 : fma3s_rm_int<opc213, !strconcat(OpStr, "213", PackTy),
+ memop, RC>;
+ defm r231 : fma3s_rm_int<opc231, !strconcat(OpStr, "231", PackTy),
+ memop, RC>;
}
multiclass fma3s<bits<8> opc132, bits<8> opc213, bits<8> opc231,
string OpStr, Intrinsic IntF32, Intrinsic IntF64,
SDNode OpNode> {
- defm SS : fma3s_forms<opc132, opc213, opc231, OpStr, "ss", IntF32, OpNode,
- FR32, f32, f32mem, ssmem, loadf32, sse_load_f32>;
- defm SD : fma3s_forms<opc132, opc213, opc231, OpStr, "sd", IntF64, OpNode,
- FR64, f64, f64mem, sdmem, loadf64, sse_load_f64>, VEX_W;
+ let ExeDomain = SSEPackedSingle in
+ defm SS : fma3s_forms<opc132, opc213, opc231, OpStr, "ss", OpNode,
+ FR32, f32mem>,
+ fma3s_int_forms<opc132, opc213, opc231, OpStr, "ss", VR128, ssmem>;
+
+ let ExeDomain = SSEPackedDouble in
+ defm SD : fma3s_forms<opc132, opc213, opc231, OpStr, "sd", OpNode,
+ FR64, f64mem>,
+ fma3s_int_forms<opc132, opc213, opc231, OpStr, "sd", VR128, sdmem>,
+ VEX_W;
+
+ // These patterns use the 123 ordering, instead of 213, even though
+ // they match the intrinsic to the 213 version of the instruction.
+ // This is because src1 is tied to dest, and the scalar intrinsics
+ // require the pass-through values to come from the first source
+ // operand, not the second.
+ def : Pat<(IntF32 VR128:$src1, VR128:$src2, VR128:$src3),
+ (COPY_TO_REGCLASS(!cast<Instruction>(NAME#"SSr213r_Int")
+ $src1, $src2, $src3), VR128)>;
+
+ def : Pat<(IntF64 VR128:$src1, VR128:$src2, VR128:$src3),
+ (COPY_TO_REGCLASS(!cast<Instruction>(NAME#"SDr213r_Int")
+ $src1, $src2, $src3), VR128)>;
}
defm VFMADD : fma3s<0x99, 0xA9, 0xB9, "vfmadd", int_x86_fma_vfmadd_ss,
[(set RC:$dst,
(OpNode RC:$src1, (mem_frag addr:$src2), RC:$src3))]>, VEX_LIG;
// For disassembler
-let isCodeGenOnly = 1, hasSideEffects = 0 in
+let isCodeGenOnly = 1, ForceDisassemble = 1, hasSideEffects = 0 in
def rr_REV : FMA4<opc, MRMSrcReg, (outs RC:$dst),
(ins RC:$src1, RC:$src2, RC:$src3),
!strconcat(OpcodeStr,
multiclass fma4s_int<bits<8> opc, string OpcodeStr, Operand memop,
ComplexPattern mem_cpat, Intrinsic Int> {
+let isCodeGenOnly = 1 in {
let isCommutable = 1 in
def rr_Int : FMA4<opc, MRMSrcReg, (outs VR128:$dst),
(ins VR128:$src1, VR128:$src2, VR128:$src3),
"\t{$src3, $src2, $src1, $dst|$dst, $src1, $src2, $src3}"),
[(set VR128:$dst,
(Int VR128:$src1, mem_cpat:$src2, VR128:$src3))]>, VEX_LIG;
+} // isCodeGenOnly = 1
}
multiclass fma4p<bits<8> opc, string OpcodeStr, SDNode OpNode,
[(set VR256:$dst, (OpNode VR256:$src1,
(ld_frag256 addr:$src2), VR256:$src3))]>, VEX_L;
// For disassembler
-let isCodeGenOnly = 1, hasSideEffects = 0 in {
+let isCodeGenOnly = 1, ForceDisassemble = 1, hasSideEffects = 0 in {
def rr_REV : FMA4<opc, MRMSrcReg, (outs VR128:$dst),
(ins VR128:$src1, VR128:$src2, VR128:$src3),
!strconcat(OpcodeStr,
} // isCodeGenOnly = 1
}
-defm VFMADDSS4 : fma4s<0x6A, "vfmaddss", FR32, f32mem, f32, X86Fmadd, loadf32>,
- fma4s_int<0x6A, "vfmaddss", ssmem, sse_load_f32,
- int_x86_fma_vfmadd_ss>;
-defm VFMADDSD4 : fma4s<0x6B, "vfmaddsd", FR64, f64mem, f64, X86Fmadd, loadf64>,
- fma4s_int<0x6B, "vfmaddsd", sdmem, sse_load_f64,
- int_x86_fma_vfmadd_sd>;
-defm VFMSUBSS4 : fma4s<0x6E, "vfmsubss", FR32, f32mem, f32, X86Fmsub, loadf32>,
- fma4s_int<0x6E, "vfmsubss", ssmem, sse_load_f32,
- int_x86_fma_vfmsub_ss>;
-defm VFMSUBSD4 : fma4s<0x6F, "vfmsubsd", FR64, f64mem, f64, X86Fmsub, loadf64>,
- fma4s_int<0x6F, "vfmsubsd", sdmem, sse_load_f64,
- int_x86_fma_vfmsub_sd>;
-defm VFNMADDSS4 : fma4s<0x7A, "vfnmaddss", FR32, f32mem, f32,
- X86Fnmadd, loadf32>,
- fma4s_int<0x7A, "vfnmaddss", ssmem, sse_load_f32,
- int_x86_fma_vfnmadd_ss>;
-defm VFNMADDSD4 : fma4s<0x7B, "vfnmaddsd", FR64, f64mem, f64,
- X86Fnmadd, loadf64>,
- fma4s_int<0x7B, "vfnmaddsd", sdmem, sse_load_f64,
- int_x86_fma_vfnmadd_sd>;
-defm VFNMSUBSS4 : fma4s<0x7E, "vfnmsubss", FR32, f32mem, f32,
- X86Fnmsub, loadf32>,
- fma4s_int<0x7E, "vfnmsubss", ssmem, sse_load_f32,
- int_x86_fma_vfnmsub_ss>;
-defm VFNMSUBSD4 : fma4s<0x7F, "vfnmsubsd", FR64, f64mem, f64,
- X86Fnmsub, loadf64>,
- fma4s_int<0x7F, "vfnmsubsd", sdmem, sse_load_f64,
- int_x86_fma_vfnmsub_sd>;
-
let ExeDomain = SSEPackedSingle in {
+ // Scalar Instructions
+ defm VFMADDSS4 : fma4s<0x6A, "vfmaddss", FR32, f32mem, f32, X86Fmadd, loadf32>,
+ fma4s_int<0x6A, "vfmaddss", ssmem, sse_load_f32,
+ int_x86_fma_vfmadd_ss>;
+ defm VFMSUBSS4 : fma4s<0x6E, "vfmsubss", FR32, f32mem, f32, X86Fmsub, loadf32>,
+ fma4s_int<0x6E, "vfmsubss", ssmem, sse_load_f32,
+ int_x86_fma_vfmsub_ss>;
+ defm VFNMADDSS4 : fma4s<0x7A, "vfnmaddss", FR32, f32mem, f32,
+ X86Fnmadd, loadf32>,
+ fma4s_int<0x7A, "vfnmaddss", ssmem, sse_load_f32,
+ int_x86_fma_vfnmadd_ss>;
+ defm VFNMSUBSS4 : fma4s<0x7E, "vfnmsubss", FR32, f32mem, f32,
+ X86Fnmsub, loadf32>,
+ fma4s_int<0x7E, "vfnmsubss", ssmem, sse_load_f32,
+ int_x86_fma_vfnmsub_ss>;
+ // Packed Instructions
defm VFMADDPS4 : fma4p<0x68, "vfmaddps", X86Fmadd, v4f32, v8f32,
loadv4f32, loadv8f32>;
defm VFMSUBPS4 : fma4p<0x6C, "vfmsubps", X86Fmsub, v4f32, v8f32,
}
let ExeDomain = SSEPackedDouble in {
+ // Scalar Instructions
+ defm VFMADDSD4 : fma4s<0x6B, "vfmaddsd", FR64, f64mem, f64, X86Fmadd, loadf64>,
+ fma4s_int<0x6B, "vfmaddsd", sdmem, sse_load_f64,
+ int_x86_fma_vfmadd_sd>;
+ defm VFMSUBSD4 : fma4s<0x6F, "vfmsubsd", FR64, f64mem, f64, X86Fmsub, loadf64>,
+ fma4s_int<0x6F, "vfmsubsd", sdmem, sse_load_f64,
+ int_x86_fma_vfmsub_sd>;
+ defm VFNMADDSD4 : fma4s<0x7B, "vfnmaddsd", FR64, f64mem, f64,
+ X86Fnmadd, loadf64>,
+ fma4s_int<0x7B, "vfnmaddsd", sdmem, sse_load_f64,
+ int_x86_fma_vfnmadd_sd>;
+ defm VFNMSUBSD4 : fma4s<0x7F, "vfnmsubsd", FR64, f64mem, f64,
+ X86Fnmsub, loadf64>,
+ fma4s_int<0x7F, "vfnmsubsd", sdmem, sse_load_f64,
+ int_x86_fma_vfnmsub_sd>;
+ // Packed Instructions
defm VFMADDPD4 : fma4p<0x69, "vfmaddpd", X86Fmadd, v2f64, v4f64,
loadv2f64, loadv4f64>;
defm VFMSUBPD4 : fma4p<0x6D, "vfmsubpd", X86Fmsub, v2f64, v4f64,
projects / oota-llvm.git / blobdiff