#5598: Function quotRem is inefficient
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Reporter: boris | Owner: igloo
Type: task | Status: new
Priority: normal | Milestone: 7.6.1
Component: Compiler | Version: 7.0.3
Keywords: division, performance, primop | Os: Unknown/Multiple
Architecture: x86 | Failure: Runtime
performance bug
Difficulty: Unknown | Testcase:
Blockedby: | Blocking:
Related: |
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Comment(by igloo@…):
commit 7bfb7bfc6da981ef827b1a166c8cbfb5b29a25a4
{{{
Author: Ian Lynagh <[email protected]>
Date: Tue Feb 14 21:26:18 2012 +0000
Define a quotRem CallishMachOp; fixes #5598
This means we no longer do a division twice when we are using quotRem
(on platforms on which the op is supported; currently only amd64).
compiler/cmm/CmmMachOp.hs | 5 +-
compiler/cmm/OldCmmUtils.hs | 11 +
compiler/cmm/PprC.hs | 10 +-
compiler/codeGen/CgPrimOp.hs | 9 +
compiler/ghc.cabal.in | 1 -
compiler/llvmGen/LlvmCodeGen/CodeGen.hs | 15 +-
compiler/nativeGen/PPC/CodeGen.hs | 14 +-
compiler/nativeGen/SPARC/CodeGen.hs | 499
+++++++++++++++++++++++-----
compiler/nativeGen/SPARC/CodeGen/CCall.hs | 343 --------------------
compiler/nativeGen/X86/CodeGen.hs | 31 ++-
compiler/prelude/primops.txt.pp | 5 +
11 files changed, 495 insertions(+), 448 deletions(-)
}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5598#comment:11>
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