diff options
Diffstat (limited to 'compiler/nativeGen/X86/CodeGen.hs')
| -rw-r--r-- | compiler/nativeGen/X86/CodeGen.hs | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/compiler/nativeGen/X86/CodeGen.hs b/compiler/nativeGen/X86/CodeGen.hs index abd4995376..0424b1b84f 100644 --- a/compiler/nativeGen/X86/CodeGen.hs +++ b/compiler/nativeGen/X86/CodeGen.hs @@ -531,7 +531,7 @@ getRegister' dflags is32Bit (CmmRegOff r n) getRegister' dflags is32Bit (CmmMachOp (MO_AlignmentCheck align _) [e]) = addAlignmentCheck align <$> getRegister' dflags is32Bit e --- for 32-bit architectuers, support some 64 -> 32 bit conversions: +-- for 32-bit architectures, support some 64 -> 32 bit conversions: -- TO_W_(x), TO_W_(x >> 32) getRegister' _ is32Bit (CmmMachOp (MO_UU_Conv W64 W32) @@ -2936,6 +2936,10 @@ outOfLineCmmOp bid mop res args MO_PopCnt _ -> fsLit "popcnt" MO_BSwap _ -> fsLit "bswap" + {- Here the C implementation is used as there is no x86 + instruction to reverse a word's bit order. + -} + MO_BRev w -> fsLit $ bRevLabel w MO_Clz w -> fsLit $ clzLabel w MO_Ctz _ -> unsupported |