Mercurial > hg > truffle
diff src/cpu/x86/vm/nativeInst_x86.cpp @ 4759:127b3692c168
7116452: Add support for AVX instructions
Summary: Added support for AVX extension to the x86 instruction set.
Reviewed-by: never
| author | kvn |
|---|---|
| date | Wed, 14 Dec 2011 14:54:38 -0800 |
| parents | f95d63e2154a |
| children | cd3d6a6b95d9 |
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--- a/src/cpu/x86/vm/nativeInst_x86.cpp Tue Dec 13 17:10:52 2011 -0800 +++ b/src/cpu/x86/vm/nativeInst_x86.cpp Wed Dec 14 14:54:38 2011 -0800 @@ -237,9 +237,21 @@ int off = 0; u_char instr_0 = ubyte_at(off); + // See comment in Assembler::locate_operand() about VEX prefixes. + if (instr_0 == instruction_VEX_prefix_2bytes) { + assert((UseAVX > 0), "shouldn't have VEX prefix"); + NOT_LP64(assert((0xC0 & ubyte_at(1)) == 0xC0, "shouldn't have LDS and LES instructions")); + return 2; + } + if (instr_0 == instruction_VEX_prefix_3bytes) { + assert((UseAVX > 0), "shouldn't have VEX prefix"); + NOT_LP64(assert((0xC0 & ubyte_at(1)) == 0xC0, "shouldn't have LDS and LES instructions")); + return 3; + } + // First check to see if we have a (prefixed or not) xor - if ( instr_0 >= instruction_prefix_wide_lo && // 0x40 - instr_0 <= instruction_prefix_wide_hi) { // 0x4f + if (instr_0 >= instruction_prefix_wide_lo && // 0x40 + instr_0 <= instruction_prefix_wide_hi) { // 0x4f off++; instr_0 = ubyte_at(off); } @@ -256,13 +268,13 @@ instr_0 = ubyte_at(off); } - if ( instr_0 == instruction_code_xmm_ss_prefix || // 0xf3 + if ( instr_0 == instruction_code_xmm_ss_prefix || // 0xf3 instr_0 == instruction_code_xmm_sd_prefix) { // 0xf2 off++; instr_0 = ubyte_at(off); } - if ( instr_0 >= instruction_prefix_wide_lo && // 0x40 + if ( instr_0 >= instruction_prefix_wide_lo && // 0x40 instr_0 <= instruction_prefix_wide_hi) { // 0x4f off++; instr_0 = ubyte_at(off);