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Diffstat (limited to 'lib/Target/X86/X86InstrInfo.td')
-rw-r--r--lib/Target/X86/X86InstrInfo.td164
1 files changed, 101 insertions, 63 deletions
diff --git a/lib/Target/X86/X86InstrInfo.td b/lib/Target/X86/X86InstrInfo.td
index cdf1c8935f..d989ec7bb0 100644
--- a/lib/Target/X86/X86InstrInfo.td
+++ b/lib/Target/X86/X86InstrInfo.td
@@ -247,9 +247,9 @@ def X86and_flag : SDNode<"X86ISD::AND", SDTBinaryArithWithFlags,
[SDNPCommutative]>;
def X86andn_flag : SDNode<"X86ISD::ANDN", SDTBinaryArithWithFlags>;
-def X86blsi_flag : SDNode<"X86ISD::BLSI", SDTUnaryArithWithFlags>;
-def X86blsmsk_flag : SDNode<"X86ISD::BLSMSK", SDTUnaryArithWithFlags>;
-def X86blsr_flag : SDNode<"X86ISD::BLSR", SDTUnaryArithWithFlags>;
+def X86blsi : SDNode<"X86ISD::BLSI", SDTIntUnaryOp>;
+def X86blsmsk : SDNode<"X86ISD::BLSMSK", SDTIntUnaryOp>;
+def X86blsr : SDNode<"X86ISD::BLSR", SDTIntUnaryOp>;
def X86mul_imm : SDNode<"X86ISD::MUL_IMM", SDTIntBinOp>;
@@ -525,6 +525,13 @@ def lea64_32mem : Operand<i32> {
let ParserMatchClass = X86MemAsmOperand;
}
+// Memory operands that use 64-bit pointers in both ILP32 and LP64.
+def lea64mem : Operand<i64> {
+ let PrintMethod = "printi64mem";
+ let MIOperandInfo = (ops GR64, i8imm, GR64_NOSP, i32imm, i8imm);
+ let ParserMatchClass = X86MemAsmOperand;
+}
+
//===----------------------------------------------------------------------===//
// X86 Complex Pattern Definitions.
@@ -535,6 +542,12 @@ def addr : ComplexPattern<iPTR, 5, "SelectAddr", [], [SDNPWantParent]>;
def lea32addr : ComplexPattern<i32, 5, "SelectLEAAddr",
[add, sub, mul, X86mul_imm, shl, or, frameindex],
[]>;
+// In 64-bit mode 32-bit LEAs can use RIP-relative addressing.
+def lea64_32addr : ComplexPattern<i32, 5, "SelectLEAAddr",
+ [add, sub, mul, X86mul_imm, shl, or,
+ frameindex, X86WrapperRIP],
+ []>;
+
def tls32addr : ComplexPattern<i32, 5, "SelectTLSADDRAddr",
[tglobaltlsaddr], []>;
@@ -590,6 +603,7 @@ def HasLZCNT : Predicate<"Subtarget->hasLZCNT()">;
def HasBMI : Predicate<"Subtarget->hasBMI()">;
def HasBMI2 : Predicate<"Subtarget->hasBMI2()">;
def HasRTM : Predicate<"Subtarget->hasRTM()">;
+def HasADX : Predicate<"Subtarget->hasADX()">;
def FPStackf32 : Predicate<"!Subtarget->hasSSE1()">;
def FPStackf64 : Predicate<"!Subtarget->hasSSE2()">;
def HasCmpxchg16b: Predicate<"Subtarget->hasCmpxchg16b()">;
@@ -856,16 +870,14 @@ let Defs = [RSP], Uses = [RSP, EFLAGS], mayStore = 1, neverHasSideEffects=1 in
def PUSHF64 : I<0x9C, RawFrm, (outs), (ins), "pushfq", [], IIC_PUSH_F>,
Requires<[In64BitMode]>;
-
-
let Defs = [EDI, ESI, EBP, EBX, EDX, ECX, EAX, ESP], Uses = [ESP],
mayLoad=1, neverHasSideEffects=1 in {
-def POPA32 : I<0x61, RawFrm, (outs), (ins), "popa{l}", [], IIC_POP_A>,
+def POPA32 : I<0x61, RawFrm, (outs), (ins), "popa{l|d}", [], IIC_POP_A>,
Requires<[In32BitMode]>;
}
let Defs = [ESP], Uses = [EDI, ESI, EBP, EBX, EDX, ECX, EAX, ESP],
mayStore=1, neverHasSideEffects=1 in {
-def PUSHA32 : I<0x60, RawFrm, (outs), (ins), "pusha{l}", [], IIC_PUSH_A>,
+def PUSHA32 : I<0x60, RawFrm, (outs), (ins), "pusha{l|d}", [], IIC_PUSH_A>,
Requires<[In32BitMode]>;
}
@@ -1043,7 +1055,7 @@ def MOV64ao64 : RIi32<0xA3, RawFrm, (outs offset64:$dst), (ins),
*/
-let isCodeGenOnly = 1 in {
+let isCodeGenOnly = 1, hasSideEffects = 0 in {
def MOV8rr_REV : I<0x8A, MRMSrcReg, (outs GR8:$dst), (ins GR8:$src),
"mov{b}\t{$src, $dst|$dst, $src}", [], IIC_MOV>;
def MOV16rr_REV : I<0x8B, MRMSrcReg, (outs GR16:$dst), (ins GR16:$src),
@@ -1133,24 +1145,26 @@ def BT64rr : RI<0xA3, MRMDestReg, (outs), (ins GR64:$src1, GR64:$src2),
// perspective, this is pretty bizarre. Make these instructions disassembly
// only for now.
-def BT16mr : I<0xA3, MRMDestMem, (outs), (ins i16mem:$src1, GR16:$src2),
- "bt{w}\t{$src2, $src1|$src1, $src2}",
-// [(X86bt (loadi16 addr:$src1), GR16:$src2),
-// (implicit EFLAGS)]
- [], IIC_BT_MR
- >, OpSize, TB, Requires<[FastBTMem]>;
-def BT32mr : I<0xA3, MRMDestMem, (outs), (ins i32mem:$src1, GR32:$src2),
- "bt{l}\t{$src2, $src1|$src1, $src2}",
-// [(X86bt (loadi32 addr:$src1), GR32:$src2),
-// (implicit EFLAGS)]
- [], IIC_BT_MR
- >, TB, Requires<[FastBTMem]>;
-def BT64mr : RI<0xA3, MRMDestMem, (outs), (ins i64mem:$src1, GR64:$src2),
- "bt{q}\t{$src2, $src1|$src1, $src2}",
-// [(X86bt (loadi64 addr:$src1), GR64:$src2),
-// (implicit EFLAGS)]
- [], IIC_BT_MR
- >, TB;
+let mayLoad = 1, hasSideEffects = 0 in {
+ def BT16mr : I<0xA3, MRMDestMem, (outs), (ins i16mem:$src1, GR16:$src2),
+ "bt{w}\t{$src2, $src1|$src1, $src2}",
+ // [(X86bt (loadi16 addr:$src1), GR16:$src2),
+ // (implicit EFLAGS)]
+ [], IIC_BT_MR
+ >, OpSize, TB, Requires<[FastBTMem]>;
+ def BT32mr : I<0xA3, MRMDestMem, (outs), (ins i32mem:$src1, GR32:$src2),
+ "bt{l}\t{$src2, $src1|$src1, $src2}",
+ // [(X86bt (loadi32 addr:$src1), GR32:$src2),
+ // (implicit EFLAGS)]
+ [], IIC_BT_MR
+ >, TB, Requires<[FastBTMem]>;
+ def BT64mr : RI<0xA3, MRMDestMem, (outs), (ins i64mem:$src1, GR64:$src2),
+ "bt{q}\t{$src2, $src1|$src1, $src2}",
+ // [(X86bt (loadi64 addr:$src1), GR64:$src2),
+ // (implicit EFLAGS)]
+ [], IIC_BT_MR
+ >, TB;
+}
def BT16ri8 : Ii8<0xBA, MRM4r, (outs), (ins GR16:$src1, i16i8imm:$src2),
"bt{w}\t{$src2, $src1|$src1, $src2}",
@@ -1181,7 +1195,7 @@ def BT64mi8 : RIi8<0xBA, MRM4m, (outs), (ins i64mem:$src1, i64i8imm:$src2),
[(set EFLAGS, (X86bt (loadi64 addr:$src1),
i64immSExt8:$src2))], IIC_BT_MI>, TB;
-
+let hasSideEffects = 0 in {
def BTC16rr : I<0xBB, MRMDestReg, (outs), (ins GR16:$src1, GR16:$src2),
"btc{w}\t{$src2, $src1|$src1, $src2}", [], IIC_BTX_RR>,
OpSize, TB;
@@ -1189,6 +1203,8 @@ def BTC32rr : I<0xBB, MRMDestReg, (outs), (ins GR32:$src1, GR32:$src2),
"btc{l}\t{$src2, $src1|$src1, $src2}", [], IIC_BTX_RR>, TB;
def BTC64rr : RI<0xBB, MRMDestReg, (outs), (ins GR64:$src1, GR64:$src2),
"btc{q}\t{$src2, $src1|$src1, $src2}", [], IIC_BTX_RR>, TB;
+
+let mayLoad = 1, mayStore = 1 in {
def BTC16mr : I<0xBB, MRMDestMem, (outs), (ins i16mem:$src1, GR16:$src2),
"btc{w}\t{$src2, $src1|$src1, $src2}", [], IIC_BTX_MR>,
OpSize, TB;
@@ -1196,6 +1212,8 @@ def BTC32mr : I<0xBB, MRMDestMem, (outs), (ins i32mem:$src1, GR32:$src2),
"btc{l}\t{$src2, $src1|$src1, $src2}", [], IIC_BTX_MR>, TB;
def BTC64mr : RI<0xBB, MRMDestMem, (outs), (ins i64mem:$src1, GR64:$src2),
"btc{q}\t{$src2, $src1|$src1, $src2}", [], IIC_BTX_MR>, TB;
+}
+
def BTC16ri8 : Ii8<0xBA, MRM7r, (outs), (ins GR16:$src1, i16i8imm:$src2),
"btc{w}\t{$src2, $src1|$src1, $src2}", [], IIC_BTX_RI>,
OpSize, TB;
@@ -1203,6 +1221,8 @@ def BTC32ri8 : Ii8<0xBA, MRM7r, (outs), (ins GR32:$src1, i32i8imm:$src2),
"btc{l}\t{$src2, $src1|$src1, $src2}", [], IIC_BTX_RI>, TB;
def BTC64ri8 : RIi8<0xBA, MRM7r, (outs), (ins GR64:$src1, i64i8imm:$src2),
"btc{q}\t{$src2, $src1|$src1, $src2}", [], IIC_BTX_RI>, TB;
+
+let mayLoad = 1, mayStore = 1 in {
def BTC16mi8 : Ii8<0xBA, MRM7m, (outs), (ins i16mem:$src1, i16i8imm:$src2),
"btc{w}\t{$src2, $src1|$src1, $src2}", [], IIC_BTX_MI>,
OpSize, TB;
@@ -1210,6 +1230,7 @@ def BTC32mi8 : Ii8<0xBA, MRM7m, (outs), (ins i32mem:$src1, i32i8imm:$src2),
"btc{l}\t{$src2, $src1|$src1, $src2}", [], IIC_BTX_MI>, TB;
def BTC64mi8 : RIi8<0xBA, MRM7m, (outs), (ins i64mem:$src1, i64i8imm:$src2),
"btc{q}\t{$src2, $src1|$src1, $src2}", [], IIC_BTX_MI>, TB;
+}
def BTR16rr : I<0xB3, MRMDestReg, (outs), (ins GR16:$src1, GR16:$src2),
"btr{w}\t{$src2, $src1|$src1, $src2}", [], IIC_BTX_RR>,
@@ -1218,6 +1239,8 @@ def BTR32rr : I<0xB3, MRMDestReg, (outs), (ins GR32:$src1, GR32:$src2),
"btr{l}\t{$src2, $src1|$src1, $src2}", [], IIC_BTX_RR>, TB;
def BTR64rr : RI<0xB3, MRMDestReg, (outs), (ins GR64:$src1, GR64:$src2),
"btr{q}\t{$src2, $src1|$src1, $src2}", []>, TB;
+
+let mayLoad = 1, mayStore = 1 in {
def BTR16mr : I<0xB3, MRMDestMem, (outs), (ins i16mem:$src1, GR16:$src2),
"btr{w}\t{$src2, $src1|$src1, $src2}", [], IIC_BTX_MR>,
OpSize, TB;
@@ -1225,6 +1248,8 @@ def BTR32mr : I<0xB3, MRMDestMem, (outs), (ins i32mem:$src1, GR32:$src2),
"btr{l}\t{$src2, $src1|$src1, $src2}", [], IIC_BTX_MR>, TB;
def BTR64mr : RI<0xB3, MRMDestMem, (outs), (ins i64mem:$src1, GR64:$src2),
"btr{q}\t{$src2, $src1|$src1, $src2}", [], IIC_BTX_MR>, TB;
+}
+
def BTR16ri8 : Ii8<0xBA, MRM6r, (outs), (ins GR16:$src1, i16i8imm:$src2),
"btr{w}\t{$src2, $src1|$src1, $src2}", [], IIC_BTX_RI>,
OpSize, TB;
@@ -1232,6 +1257,8 @@ def BTR32ri8 : Ii8<0xBA, MRM6r, (outs), (ins GR32:$src1, i32i8imm:$src2),
"btr{l}\t{$src2, $src1|$src1, $src2}", [], IIC_BTX_RI>, TB;
def BTR64ri8 : RIi8<0xBA, MRM6r, (outs), (ins GR64:$src1, i64i8imm:$src2),
"btr{q}\t{$src2, $src1|$src1, $src2}", [], IIC_BTX_RI>, TB;
+
+let mayLoad = 1, mayStore = 1 in {
def BTR16mi8 : Ii8<0xBA, MRM6m, (outs), (ins i16mem:$src1, i16i8imm:$src2),
"btr{w}\t{$src2, $src1|$src1, $src2}", [], IIC_BTX_MI>,
OpSize, TB;
@@ -1239,6 +1266,7 @@ def BTR32mi8 : Ii8<0xBA, MRM6m, (outs), (ins i32mem:$src1, i32i8imm:$src2),
"btr{l}\t{$src2, $src1|$src1, $src2}", [], IIC_BTX_MI>, TB;
def BTR64mi8 : RIi8<0xBA, MRM6m, (outs), (ins i64mem:$src1, i64i8imm:$src2),
"btr{q}\t{$src2, $src1|$src1, $src2}", [], IIC_BTX_MI>, TB;
+}
def BTS16rr : I<0xAB, MRMDestReg, (outs), (ins GR16:$src1, GR16:$src2),
"bts{w}\t{$src2, $src1|$src1, $src2}", [], IIC_BTX_RR>,
@@ -1247,6 +1275,8 @@ def BTS32rr : I<0xAB, MRMDestReg, (outs), (ins GR32:$src1, GR32:$src2),
"bts{l}\t{$src2, $src1|$src1, $src2}", [], IIC_BTX_RR>, TB;
def BTS64rr : RI<0xAB, MRMDestReg, (outs), (ins GR64:$src1, GR64:$src2),
"bts{q}\t{$src2, $src1|$src1, $src2}", [], IIC_BTX_RR>, TB;
+
+let mayLoad = 1, mayStore = 1 in {
def BTS16mr : I<0xAB, MRMDestMem, (outs), (ins i16mem:$src1, GR16:$src2),
"bts{w}\t{$src2, $src1|$src1, $src2}", [], IIC_BTX_MR>,
OpSize, TB;
@@ -1254,6 +1284,8 @@ def BTS32mr : I<0xAB, MRMDestMem, (outs), (ins i32mem:$src1, GR32:$src2),
"bts{l}\t{$src2, $src1|$src1, $src2}", [], IIC_BTX_MR>, TB;
def BTS64mr : RI<0xAB, MRMDestMem, (outs), (ins i64mem:$src1, GR64:$src2),
"bts{q}\t{$src2, $src1|$src1, $src2}", [], IIC_BTX_MR>, TB;
+}
+
def BTS16ri8 : Ii8<0xBA, MRM5r, (outs), (ins GR16:$src1, i16i8imm:$src2),
"bts{w}\t{$src2, $src1|$src1, $src2}", [], IIC_BTX_RI>,
OpSize, TB;
@@ -1261,6 +1293,8 @@ def BTS32ri8 : Ii8<0xBA, MRM5r, (outs), (ins GR32:$src1, i32i8imm:$src2),
"bts{l}\t{$src2, $src1|$src1, $src2}", [], IIC_BTX_RI>, TB;
def BTS64ri8 : RIi8<0xBA, MRM5r, (outs), (ins GR64:$src1, i64i8imm:$src2),
"bts{q}\t{$src2, $src1|$src1, $src2}", [], IIC_BTX_RI>, TB;
+
+let mayLoad = 1, mayStore = 1 in {
def BTS16mi8 : Ii8<0xBA, MRM5m, (outs), (ins i16mem:$src1, i16i8imm:$src2),
"bts{w}\t{$src2, $src1|$src1, $src2}", [], IIC_BTX_MI>,
OpSize, TB;
@@ -1268,6 +1302,8 @@ def BTS32mi8 : Ii8<0xBA, MRM5m, (outs), (ins i32mem:$src1, i32i8imm:$src2),
"bts{l}\t{$src2, $src1|$src1, $src2}", [], IIC_BTX_MI>, TB;
def BTS64mi8 : RIi8<0xBA, MRM5m, (outs), (ins i64mem:$src1, i64i8imm:$src2),
"bts{q}\t{$src2, $src1|$src1, $src2}", [], IIC_BTX_MI>, TB;
+}
+} // hasSideEffects = 0
} // Defs = [EFLAGS]
@@ -1280,34 +1316,34 @@ def BTS64mi8 : RIi8<0xBA, MRM5m, (outs), (ins i64mem:$src1, i64i8imm:$src2),
multiclass ATOMIC_SWAP<bits<8> opc8, bits<8> opc, string mnemonic, string frag,
InstrItinClass itin> {
let Constraints = "$val = $dst" in {
- def #NAME#8rm : I<opc8, MRMSrcMem, (outs GR8:$dst),
- (ins GR8:$val, i8mem:$ptr),
- !strconcat(mnemonic, "{b}\t{$val, $ptr|$ptr, $val}"),
- [(set
- GR8:$dst,
- (!cast<PatFrag>(frag # "_8") addr:$ptr, GR8:$val))],
- itin>;
- def #NAME#16rm : I<opc, MRMSrcMem, (outs GR16:$dst),
- (ins GR16:$val, i16mem:$ptr),
- !strconcat(mnemonic, "{w}\t{$val, $ptr|$ptr, $val}"),
- [(set
- GR16:$dst,
- (!cast<PatFrag>(frag # "_16") addr:$ptr, GR16:$val))],
- itin>, OpSize;
- def #NAME#32rm : I<opc, MRMSrcMem, (outs GR32:$dst),
- (ins GR32:$val, i32mem:$ptr),
- !strconcat(mnemonic, "{l}\t{$val, $ptr|$ptr, $val}"),
+ def NAME#8rm : I<opc8, MRMSrcMem, (outs GR8:$dst),
+ (ins GR8:$val, i8mem:$ptr),
+ !strconcat(mnemonic, "{b}\t{$val, $ptr|$ptr, $val}"),
+ [(set
+ GR8:$dst,
+ (!cast<PatFrag>(frag # "_8") addr:$ptr, GR8:$val))],
+ itin>;
+ def NAME#16rm : I<opc, MRMSrcMem, (outs GR16:$dst),
+ (ins GR16:$val, i16mem:$ptr),
+ !strconcat(mnemonic, "{w}\t{$val, $ptr|$ptr, $val}"),
+ [(set
+ GR16:$dst,
+ (!cast<PatFrag>(frag # "_16") addr:$ptr, GR16:$val))],
+ itin>, OpSize;
+ def NAME#32rm : I<opc, MRMSrcMem, (outs GR32:$dst),
+ (ins GR32:$val, i32mem:$ptr),
+ !strconcat(mnemonic, "{l}\t{$val, $ptr|$ptr, $val}"),
+ [(set
+ GR32:$dst,
+ (!cast<PatFrag>(frag # "_32") addr:$ptr, GR32:$val))],
+ itin>;
+ def NAME#64rm : RI<opc, MRMSrcMem, (outs GR64:$dst),
+ (ins GR64:$val, i64mem:$ptr),
+ !strconcat(mnemonic, "{q}\t{$val, $ptr|$ptr, $val}"),
[(set
- GR32:$dst,
- (!cast<PatFrag>(frag # "_32") addr:$ptr, GR32:$val))],
+ GR64:$dst,
+ (!cast<PatFrag>(frag # "_64") addr:$ptr, GR64:$val))],
itin>;
- def #NAME#64rm : RI<opc, MRMSrcMem, (outs GR64:$dst),
- (ins GR64:$val, i64mem:$ptr),
- !strconcat(mnemonic, "{q}\t{$val, $ptr|$ptr, $val}"),
- [(set
- GR64:$dst,
- (!cast<PatFrag>(frag # "_64") addr:$ptr, GR64:$val))],
- itin>;
}
}
@@ -1486,10 +1522,10 @@ def BOUNDS32rm : I<0x62, MRMSrcMem, (outs GR32:$dst), (ins i32mem:$src),
Requires<[In32BitMode]>;
// Adjust RPL Field of Segment Selector
-def ARPL16rr : I<0x63, MRMDestReg, (outs GR16:$src), (ins GR16:$dst),
+def ARPL16rr : I<0x63, MRMDestReg, (outs GR16:$dst), (ins GR16:$src),
"arpl\t{$src, $dst|$dst, $src}", [], IIC_ARPL_REG>,
Requires<[In32BitMode]>;
-def ARPL16mr : I<0x63, MRMSrcMem, (outs GR16:$src), (ins i16mem:$dst),
+def ARPL16mr : I<0x63, MRMDestMem, (outs), (ins i16mem:$dst, GR16:$src),
"arpl\t{$src, $dst|$dst, $src}", [], IIC_ARPL_MEM>,
Requires<[In32BitMode]>;
@@ -1605,26 +1641,26 @@ multiclass bmi_bls<string mnemonic, Format RegMRM, Format MemMRM,
PatFrag ld_frag> {
def rr : I<0xF3, RegMRM, (outs RC:$dst), (ins RC:$src),
!strconcat(mnemonic, "\t{$src, $dst|$dst, $src}"),
- [(set RC:$dst, EFLAGS, (OpNode RC:$src))]>, T8, VEX_4V;
+ [(set RC:$dst, (OpNode RC:$src)), (implicit EFLAGS)]>, T8, VEX_4V;
def rm : I<0xF3, MemMRM, (outs RC:$dst), (ins x86memop:$src),
!strconcat(mnemonic, "\t{$src, $dst|$dst, $src}"),
- [(set RC:$dst, EFLAGS, (OpNode (ld_frag addr:$src)))]>,
+ [(set RC:$dst, (OpNode (ld_frag addr:$src))), (implicit EFLAGS)]>,
T8, VEX_4V;
}
let Predicates = [HasBMI], Defs = [EFLAGS] in {
defm BLSR32 : bmi_bls<"blsr{l}", MRM1r, MRM1m, GR32, i32mem,
- X86blsr_flag, loadi32>;
+ X86blsr, loadi32>;
defm BLSR64 : bmi_bls<"blsr{q}", MRM1r, MRM1m, GR64, i64mem,
- X86blsr_flag, loadi64>, VEX_W;
+ X86blsr, loadi64>, VEX_W;
defm BLSMSK32 : bmi_bls<"blsmsk{l}", MRM2r, MRM2m, GR32, i32mem,
- X86blsmsk_flag, loadi32>;
+ X86blsmsk, loadi32>;
defm BLSMSK64 : bmi_bls<"blsmsk{q}", MRM2r, MRM2m, GR64, i64mem,
- X86blsmsk_flag, loadi64>, VEX_W;
+ X86blsmsk, loadi64>, VEX_W;
defm BLSI32 : bmi_bls<"blsi{l}", MRM3r, MRM3m, GR32, i32mem,
- X86blsi_flag, loadi32>;
+ X86blsi, loadi32>;
defm BLSI64 : bmi_bls<"blsi{q}", MRM3r, MRM3m, GR64, i64mem,
- X86blsi_flag, loadi64>, VEX_W;
+ X86blsi, loadi64>, VEX_W;
}
multiclass bmi_bextr_bzhi<bits<8> opc, string mnemonic, RegisterClass RC,
@@ -1886,6 +1922,8 @@ def : InstAlias<"fmulp", (MUL_FPrST0 ST1)>;
def : InstAlias<"fdivp", (DIVR_FPrST0 ST1)>;
def : InstAlias<"fdivrp", (DIV_FPrST0 ST1)>;
def : InstAlias<"fxch", (XCH_F ST1)>;
+def : InstAlias<"fcom", (COM_FST0r ST1)>;
+def : InstAlias<"fcomp", (COMP_FST0r ST1)>;
def : InstAlias<"fcomi", (COM_FIr ST1)>;
def : InstAlias<"fcompi", (COM_FIPr ST1)>;
def : InstAlias<"fucom", (UCOM_Fr ST1)>;