From cbf5d74e6a99b6e38c9c05e08b6319ed0ce49650 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Sun, 21 Nov 2010 08:18:57 +0000 Subject: [PATCH] implement PR8524, apparently mainline gas accepts movq as an alias for movd when transfering between i64 gprs and mmx regs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119931 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/X86/X86InstrInfo.td | 4 ++++ test/MC/X86/x86-64.s | 7 +++++++ 2 files changed, 11 insertions(+) diff --git a/lib/Target/X86/X86InstrInfo.td b/lib/Target/X86/X86InstrInfo.td index 0a60eb7b917..10e9e9a88e4 100644 --- a/lib/Target/X86/X86InstrInfo.td +++ b/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)>; diff --git a/test/MC/X86/x86-64.s b/test/MC/X86/x86-64.s index b8b093c19b8..f1a14e871f1 100644 --- a/test/MC/X86/x86-64.s +++ b/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] + -- 2.34.1