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| author | Chris Lattner <sabre@nondot.org> | 2010-11-21 08:18:57 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2010-11-21 08:18:57 +0000 |
| commit | b4cd1819fa1230a7cd2a41bbf36151ee45294ec5 (patch) | |
| tree | c2511582bbf0ba5ad92aa16f6c3b8b51b70c034a | |
| parent | 595722965905f6c4e8fe2109e005359844964f24 (diff) | |
| download | bcm5719-llvm-b4cd1819fa1230a7cd2a41bbf36151ee45294ec5.tar.gz bcm5719-llvm-b4cd1819fa1230a7cd2a41bbf36151ee45294ec5.zip | |
implement PR8524, apparently mainline gas accepts movq as an alias for movd
when transfering between i64 gprs and mmx regs.
llvm-svn: 119931
| -rw-r--r-- | llvm/lib/Target/X86/X86InstrInfo.td | 4 | ||||
| -rw-r--r-- | llvm/test/MC/X86/x86-64.s | 7 |
2 files changed, 11 insertions, 0 deletions
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 <largeimm>, <reg>' 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)>; diff --git a/llvm/test/MC/X86/x86-64.s b/llvm/test/MC/X86/x86-64.s index b8b093c19b8..f1a14e871f1 100644 --- a/llvm/test/MC/X86/x86-64.s +++ b/llvm/test/MC/X86/x86-64.s @@ -902,3 +902,10 @@ mov %gs, (%rsi) // CHECK: movl %gs, (%rsi) # encoding: [0x8c,0x2e] idiv 0x7eed,%eax idiv 0xbabecafe,%eax idiv 0x12345678,%eax + +// PR8524 +movd %rax, %mm5 // CHECK: movd %rax, %mm5 # encoding: [0x48,0x0f,0x6e,0xe8] +movd %mm5, %rbx // CHECK: movd %mm5, %rbx # encoding: [0x48,0x0f,0x7e,0xeb] +movq %rax, %mm5 // CHECK: movd %rax, %mm5 # encoding: [0x48,0x0f,0x6e,0xe8] +movq %mm5, %rbx // CHECK: movd %mm5, %rbx # encoding: [0x48,0x0f,0x7e,0xeb] + |
