diff options
Diffstat (limited to 'compiler/codeGen/CgPrimOp.hs')
| -rw-r--r-- | compiler/codeGen/CgPrimOp.hs | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/compiler/codeGen/CgPrimOp.hs b/compiler/codeGen/CgPrimOp.hs index 9165cf44bc..641cd5d1dc 100644 --- a/compiler/codeGen/CgPrimOp.hs +++ b/compiler/codeGen/CgPrimOp.hs @@ -404,12 +404,14 @@ emitPrimOp res WriteByteArrayOp_Word16 args _ = doWriteByteArrayOp (Just mo_W emitPrimOp res WriteByteArrayOp_Word32 args _ = doWriteByteArrayOp (Just mo_WordTo32) b32 res args emitPrimOp res WriteByteArrayOp_Word64 args _ = doWriteByteArrayOp Nothing b64 res args --- Copying byte arrays +-- Copying and setting byte arrays emitPrimOp [] CopyByteArrayOp [src,src_off,dst,dst_off,n] live = doCopyByteArrayOp src src_off dst dst_off n live emitPrimOp [] CopyMutableByteArrayOp [src,src_off,dst,dst_off,n] live = doCopyMutableByteArrayOp src src_off dst dst_off n live +emitPrimOp [] SetByteArrayOp [ba,off,len,c] live = + doSetByteArrayOp ba off len c live -- Population count emitPrimOp [res] PopCnt8Op [w] live = emitPopCntCall res w W8 live @@ -908,6 +910,18 @@ emitCopyByteArray copy src src_off dst dst_off n live = do copy src dst dst_p src_p n live -- ---------------------------------------------------------------------------- +-- Setting byte arrays + +-- | Takes a 'MutableByteArray#', an offset into the array, a length, +-- and a byte, and sets each of the selected bytes in the array to the +-- character. +doSetByteArrayOp :: CmmExpr -> CmmExpr -> CmmExpr -> CmmExpr + -> StgLiveVars -> Code +doSetByteArrayOp ba off len c live + = do p <- assignTemp $ cmmOffsetExpr (cmmOffsetB ba arrWordsHdrSize) off + emitMemsetCall p c len (CmmLit (mkIntCLit 1)) live + +-- ---------------------------------------------------------------------------- -- Copying pointer arrays -- EZY: This code has an unusually high amount of assignTemp calls, seen |