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| author | Ildar Isaev | 2015-02-05 14:37:25 +0100 |
|---|---|---|
| committer | Peter Maydell | 2015-02-05 14:37:25 +0100 |
| commit | fc1792e9aa36227ee9994757974f9397684e1a48 (patch) | |
| tree | 09e791d458a9e12f1d05b66a461e0a6307189929 /target-arm/helper.c | |
| parent | target-arm: Guest cpu endianness determination for virtio KVM ARM/ARM64 (diff) | |
| download | qemu-fc1792e9aa36227ee9994757974f9397684e1a48.tar.gz qemu-fc1792e9aa36227ee9994757974f9397684e1a48.tar.xz qemu-fc1792e9aa36227ee9994757974f9397684e1a48.zip | |
target-arm: fix for exponent comparison in recpe_f64
f64 exponent in HELPER(recpe_f64) should be compared to 2045 rather than 1023
(FPRecipEstimate in ARMV8 spec). This fixes incorrect underflow handling when
flushing denormals to zero in the FRECPE instructions operating on 64-bit
values.
Signed-off-by: Ildar Isaev <ild@inbox.ru>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'target-arm/helper.c')
| -rw-r--r-- | target-arm/helper.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/target-arm/helper.c b/target-arm/helper.c index d930021c13..1a1a00577e 100644 --- a/target-arm/helper.c +++ b/target-arm/helper.c @@ -6526,7 +6526,7 @@ float64 HELPER(recpe_f64)(float64 input, void *fpstp) } else { return float64_set_sign(float64_maxnorm, float64_is_neg(f64)); } - } else if (f64_exp >= 1023 && fpst->flush_to_zero) { + } else if (f64_exp >= 2045 && fpst->flush_to_zero) { float_raise(float_flag_underflow, fpst); return float64_set_sign(float64_zero, float64_is_neg(f64)); } |