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| author | Andreas Sandberg <andreas@sandberg.pp.se> | 2013-06-18 16:10:42 +0200 |
|---|---|---|
| committer | Andreas Sandberg <andreas@sandberg.pp.se> | 2013-06-18 16:10:42 +0200 |
| commit | 5d584934ada15446123d5dc97a9de820a87fd4cf (patch) | |
| tree | 8ed8c0dc38c753588d560fa645d3e5716b003ea6 /src/arch/x86/isa/insts | |
| parent | 6151c0f7f43f0e3b62a6a2887a4a80d1c2154a3b (diff) | |
| download | gem5-5d584934ada15446123d5dc97a9de820a87fd4cf.tar.xz | |
x86: Make fprem like the fprem on a real x87
The current implementation of fprem simply does an fmod and doesn't
simulate any of the iterative behavior in a real fprem. This isn't
normally a problem, however, it can lead to problems when switching
between CPU models. If switching from a real CPU in the middle of an
fprem loop to a simulated CPU, the output of the fprem loop becomes
correupted. This changeset changes the fprem implementation to work
like the one on real hardware.
Diffstat (limited to 'src/arch/x86/isa/insts')
| -rw-r--r-- | src/arch/x86/isa/insts/x87/arithmetic/partial_remainder.py | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/arch/x86/isa/insts/x87/arithmetic/partial_remainder.py b/src/arch/x86/isa/insts/x87/arithmetic/partial_remainder.py index b02184e1a..42aabfdf6 100644 --- a/src/arch/x86/isa/insts/x87/arithmetic/partial_remainder.py +++ b/src/arch/x86/isa/insts/x87/arithmetic/partial_remainder.py @@ -37,10 +37,10 @@ microcode = ''' def macroop FPREM { - premfp st(0), st(1), st(0) + premfp st(0), st(1), st(0), SetStatus=True }; def macroop FPREM1 { - premfp st(0), st(1), st(0) + premfp st(0), st(1), st(0), SetStatus=True }; ''' |