From b4cd1819fa1230a7cd2a41bbf36151ee45294ec5 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Sun, 21 Nov 2010 08:18:57 +0000 Subject: implement PR8524, apparently mainline gas accepts movq as an alias for movd when transfering between i64 gprs and mmx regs. llvm-svn: 119931 --- llvm/lib/Target/X86/X86InstrInfo.td | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'llvm/lib') diff --git a/llvm/lib/Target/X86/X86InstrInfo.td b/llvm/lib/Target/X86/X86InstrInfo.td index 0a60eb7b917..10e9e9a88e4 100644 --- a/llvm/lib/Target/X86/X86InstrInfo.td +++ b/llvm/lib/Target/X86/X86InstrInfo.td @@ -1497,6 +1497,10 @@ def : InstAlias<"mov $seg, $mem", (MOV32ms i32mem:$mem, SEGMENT_REG:$seg)>; // Match 'movq , ' as an alias for movabsq. def : InstAlias<"movq $imm, $reg", (MOV64ri GR64:$reg, i64imm:$imm)>; +// Match 'movq GR64, MMX' as an alias for movd. +def : InstAlias<"movq $src, $dst", (MMX_MOVD64to64rr VR64:$dst, GR64:$src)>; +def : InstAlias<"movq $src, $dst", (MMX_MOVD64from64rr GR64:$dst, VR64:$src)>; + // movsd with no operands (as opposed to the SSE scalar move of a double) is an // alias for movsl. (as in rep; movsd) def : InstAlias<"movsd", (MOVSD)>; -- cgit v1.2.3