Reduce x86 sequence for GP pair to XMM
Added support for punpckldq which is useful for interleaving
32-bit values from two xmm registers.
This new instruction is now used for transfers from GP pairs
to XMM in order to reduce path length.
Change-Id: I70d9b69449dfcfb9a94a628deb74a7cffe96bac7
Signed-off-by: Razvan A Lupusoru <razvan.a.lupusoru@intel.com>
diff --git a/disassembler/disassembler_x86.cc b/disassembler/disassembler_x86.cc
index 6d82f0a..ef83498 100644
--- a/disassembler/disassembler_x86.cc
+++ b/disassembler/disassembler_x86.cc
@@ -392,6 +392,17 @@
has_modrm = true;
src_reg_file = dst_reg_file = SSE;
break;
+ case 0x62:
+ if (prefix[2] == 0x66) {
+ src_reg_file = dst_reg_file = SSE;
+ prefix[2] = 0; // Clear prefix now. It has served its purpose as part of the opcode.
+ } else {
+ src_reg_file = dst_reg_file = MMX;
+ }
+ opcode << "punpckldq";
+ load = true;
+ has_modrm = true;
+ break;
case 0x6E:
if (prefix[2] == 0x66) {
dst_reg_file = SSE;