diff options
Diffstat (limited to 'lib/Target/X86/X86InstrInfo.td')
| -rw-r--r-- | lib/Target/X86/X86InstrInfo.td | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/lib/Target/X86/X86InstrInfo.td b/lib/Target/X86/X86InstrInfo.td index 61e4b57a85..03a9a332ce 100644 --- a/lib/Target/X86/X86InstrInfo.td +++ b/lib/Target/X86/X86InstrInfo.td @@ -1154,11 +1154,11 @@ def XCHG64rr : RI<0x87, MRMSrcReg, (outs GR64:$dst), (ins GR64:$val,GR64:$src), "xchg{q}\t{$val, $src|$src, $val}", []>; } -def XCHG16ar : I<0x90, AddRegFrm, (outs), (ins GR16:$src), +def XCHG16ar : I<0x90, AddRegFrm, (outs), (ins GR16_NOAX:$src), "xchg{w}\t{$src, %ax|AX, $src}", []>, OpSize; -def XCHG32ar : I<0x90, AddRegFrm, (outs), (ins GR32:$src), +def XCHG32ar : I<0x90, AddRegFrm, (outs), (ins GR32_NOAX:$src), "xchg{l}\t{$src, %eax|EAX, $src}", []>; -def XCHG64ar : RI<0x90, AddRegFrm, (outs), (ins GR64:$src), +def XCHG64ar : RI<0x90, AddRegFrm, (outs), (ins GR64_NOAX:$src), "xchg{q}\t{$src, %rax|RAX, $src}", []>; @@ -1714,3 +1714,8 @@ def : InstAlias<"xchgb $mem, $val", (XCHG8rm GR8 :$val, i8mem :$mem)>; def : InstAlias<"xchgw $mem, $val", (XCHG16rm GR16:$val, i16mem:$mem)>; def : InstAlias<"xchgl $mem, $val", (XCHG32rm GR32:$val, i32mem:$mem)>; def : InstAlias<"xchgq $mem, $val", (XCHG64rm GR64:$val, i64mem:$mem)>; + +// xchg: We accept "xchgX <reg>, %eax" and "xchgX %eax, <reg>" as synonyms. +def : InstAlias<"xchgw %ax, $src", (XCHG16ar GR16_NOAX:$src)>; +def : InstAlias<"xchgl %eax, $src", (XCHG32ar GR32_NOAX:$src)>; +def : InstAlias<"xchgq %rax, $src", (XCHG64ar GR64_NOAX:$src)>; |