diff options
Diffstat (limited to 'compiler/nativeGen/X86/Instr.hs')
| -rw-r--r-- | compiler/nativeGen/X86/Instr.hs | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/compiler/nativeGen/X86/Instr.hs b/compiler/nativeGen/X86/Instr.hs index b8b81aeba7..9c67266f50 100644 --- a/compiler/nativeGen/X86/Instr.hs +++ b/compiler/nativeGen/X86/Instr.hs @@ -326,8 +326,10 @@ data Instr -- call 1f -- 1: popl %reg - -- SSE4.2 - | POPCNT Size Operand Reg -- src, dst + -- bit counting instructions + | POPCNT Size Operand Reg -- [SSE4.2] count number of bits set to 1 + | BSF Size Operand Reg -- bit scan forward + | BSR Size Operand Reg -- bit scan reverse -- prefetch | PREFETCH PrefetchVariant Size Operand -- prefetch Variant, addr size, address to prefetch @@ -439,6 +441,8 @@ x86_regUsageOfInstr platform instr DELTA _ -> noUsage POPCNT _ src dst -> mkRU (use_R src []) [dst] + BSF _ src dst -> mkRU (use_R src []) [dst] + BSR _ src dst -> mkRU (use_R src []) [dst] -- note: might be a better way to do this PREFETCH _ _ src -> mkRU (use_R src []) [] @@ -610,6 +614,8 @@ x86_patchRegsOfInstr instr env CLTD _ -> instr POPCNT sz src dst -> POPCNT sz (patchOp src) (env dst) + BSF sz src dst -> BSF sz (patchOp src) (env dst) + BSR sz src dst -> BSR sz (patchOp src) (env dst) PREFETCH lvl size src -> PREFETCH lvl size (patchOp src) |