X86: Implement the X86 sse2 haddpd instruction

This patch implements the haddpd instruction.

It fixes the problem in the previous version (pointed out by Gabe Black)
where an incorrect result would happen if you issue the instruction
with the same argument twice, i.e. "haddpd %xmm0,%xmm0"

This instruction is used by many spec2k benchmarks.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/arch/x86/isa/decoder/two_byte_opcodes.isa b/src/arch/x86/isa/decoder/two_byte_opcodes.isa
index 27aabaccc..5512f417c 100644
--- a/src/arch/x86/isa/decoder/two_byte_opcodes.isa
+++ b/src/arch/x86/isa/decoder/two_byte_opcodes.isa
@@ -707,7 +707,7 @@
                     }
                     // operand size (0x66)
                     0x1: decode OPCODE_OP_BOTTOM3 {
-                        0x4: WarnUnimpl::haddpd_Vo_Wo();
+                        0x4: HADDPD(Vo,Wo);
                         0x5: WarnUnimpl::hsubpd_Vo_Wo();
                         0x6: WarnUnimpl::movd_Ed_Vd();
                         0x7: MOVDQA(Wo,Vo);