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authorRichard Sandiford <rdsandiford@googlemail.com>2013-01-22 17:03:05 +0000
committerBlue Swirl <blauwirbel@gmail.com>2013-01-26 13:22:09 +0000
commita6e7c18476f5383720b3f57ef4f467b2e7c2565e (patch)
tree9682242c1c4597fd0891742dc2e0a460167b5cec /fpu/softfloat.c
parentde16017dc8f2c33c73bd3faebf3c626c400af5e4 (diff)
downloadqemu-arm-a6e7c18476f5383720b3f57ef4f467b2e7c2565e.tar.gz
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.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fpu/softfloat.c b/fpu/softfloat.c
index ac3d150015..83ccc4b8cd 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) {