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authorRichard Henderson <richard.henderson@linaro.org>2018-08-16 14:05:29 +0100
committerPeter Maydell <peter.maydell@linaro.org>2018-08-16 14:29:58 +0100
commit64d450a0eaad5f02f9d6bba1dd451446297bb4dc (patch)
tree5cf0dca5f3ce13e2fd301e4b9d20f0c68200a12d /fpu/softfloat.c
parentb8a4a96db3639e17ab5e5cdc14fca4b19fbf5b3b (diff)
softfloat: Fix missing inexact for floating-point add
For 0x1.0000000000003p+0 + 0x1.ffffffep+14 = 0x1.0001fffp+15 we dropped the sticky bit and so failed to raise inexact. Reported-by: Laurent Desnogues <laurent.desnogues@gmail.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Laurent Desnogues <laurent.desnogues@gmail.com> Tested-by: Laurent Desnogues <laurent.desnogues@gmail.com> Message-id: 20180810193129.1556-7-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'fpu/softfloat.c')
-rw-r--r--fpu/softfloat.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fpu/softfloat.c b/fpu/softfloat.c
index 8cd2400081..7d63cffdeb 100644
--- a/fpu/softfloat.c
+++ b/fpu/softfloat.c
@@ -701,7 +701,7 @@ static FloatParts addsub_floats(FloatParts a, FloatParts b, bool subtract,
}
a.frac += b.frac;
if (a.frac & DECOMPOSED_OVERFLOW_BIT) {
- a.frac >>= 1;
+ shift64RightJamming(a.frac, 1, &a.frac);
a.exp += 1;
}
return a;