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small optimization for PALIGNR instruction

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This commit is contained in:
Stanislav Shwartsman 2011-08-25 19:29:33 +00:00
parent e796e6a96c
commit b3898f4bec
1 changed files with 2 additions and 4 deletions
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6
bochs/cpu/sse_move.cc
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@ -1063,8 +1063,7 @@ BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::PALIGNR_VdqWdqIbR(bxInstruction_c
unsigned shift = i->Ib() * 8; unsigned shift = i->Ib() * 8;
if(shift == 0) { if(shift == 0) {
result.xmm64u(0) = op2.xmm64u(0); result = op2;
result.xmm64u(1) = op2.xmm64u(1);
} }
else if(shift < 64) { else if(shift < 64) {
result.xmm64u(0) = (op2.xmm64u(0) >> shift) | (op2.xmm64u(1) << (64-shift)); result.xmm64u(0) = (op2.xmm64u(0) >> shift) | (op2.xmm64u(1) << (64-shift));
@ -1080,8 +1079,7 @@ BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::PALIGNR_VdqWdqIbR(bxInstruction_c
result.xmm64u(1) = (op1.xmm64u(0) >> shift) | (op1.xmm64u(1) << (64-shift)); result.xmm64u(1) = (op1.xmm64u(0) >> shift) | (op1.xmm64u(1) << (64-shift));
} }
else if(shift == 128) { else if(shift == 128) {
result.xmm64u(0) = op1.xmm64u(0); result = op1;
result.xmm64u(1) = op1.xmm64u(1);
} }
else if(shift < 192) { else if(shift < 192) {
shift -= 128; shift -= 128;