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| author | Richard Sandiford <rdsandiford@googlemail.com> | 2013-01-22 17:03:05 +0000 |
|---|---|---|
| committer | Blue Swirl <blauwirbel@gmail.com> | 2013-01-26 13:22:09 +0000 |
| commit | a6e7c18476f5383720b3f57ef4f467b2e7c2565e (patch) | |
| tree | 9682242c1c4597fd0891742dc2e0a460167b5cec /fpu/softfloat.c | |
| parent | de16017dc8f2c33c73bd3faebf3c626c400af5e4 (diff) | |
| download | qemu-a6e7c18476f5383720b3f57ef4f467b2e7c2565e.zip qemu-a6e7c18476f5383720b3f57ef4f467b2e7c2565e.tar.gz qemu-a6e7c18476f5383720b3f57ef4f467b2e7c2565e.tar.bz2 | |
softfloat: Handle float_muladd_negate_c when product is zero
Honour float_muladd_negate_c in the case where the product is zero and
c is nonzero. Previously we would fail to negate c.
Seen in (and tested against) the gfortran testsuite on MIPS.
Signed-off-by: Richard Sandiford <rdsandiford@googlemail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Diffstat (limited to 'fpu/softfloat.c')
| -rw-r--r-- | fpu/softfloat.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fpu/softfloat.c b/fpu/softfloat.c index ac3d150..83ccc4b 100644 --- a/fpu/softfloat.c +++ b/fpu/softfloat.c @@ -2234,7 +2234,7 @@ float32 float32_muladd(float32 a, float32 b, float32 c, int flags STATUS_PARAM) } } /* Zero plus something non-zero : just return the something */ - return make_float32(float32_val(c) ^ (signflip << 31)); + return packFloat32(cSign ^ signflip, cExp, cSig); } if (aExp == 0) { @@ -3787,7 +3787,7 @@ float64 float64_muladd(float64 a, float64 b, float64 c, int flags STATUS_PARAM) } } /* Zero plus something non-zero : just return the something */ - return make_float64(float64_val(c) ^ ((uint64_t)signflip << 63)); + return packFloat64(cSign ^ signflip, cExp, cSig); } if (aExp == 0) { |