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[Qemu-devel] [PULL 28/28] target-arm: fix for exponent comparison in rec
From: |
Peter Maydell |
Subject: |
[Qemu-devel] [PULL 28/28] target-arm: fix for exponent comparison in recpe_f64 |
Date: |
Thu, 5 Feb 2015 14:03:07 +0000 |
From: Ildar Isaev <address@hidden>
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 <address@hidden>
Signed-off-by: Peter Maydell <address@hidden>
---
target-arm/helper.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/target-arm/helper.c b/target-arm/helper.c
index d930021..1a1a005 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));
}
--
1.9.1
- [Qemu-devel] [PULL 00/28] target-arm queue, Peter Maydell, 2015/02/05
- [Qemu-devel] [PULL 01/28] target_arm: Remove memory region init from armv7m_init, Peter Maydell, 2015/02/05
- [Qemu-devel] [PULL 28/28] target-arm: fix for exponent comparison in recpe_f64,
Peter Maydell <=
- [Qemu-devel] [PULL 26/28] target-arm: KVM64: Get and Sync up guest register state like kvm32., Peter Maydell, 2015/02/05
- [Qemu-devel] [PULL 27/28] target-arm: Guest cpu endianness determination for virtio KVM ARM/ARM64, Peter Maydell, 2015/02/05
- [Qemu-devel] [PULL 25/28] disas/arm-a64.cc: Tell libvixl correct code addresses, Peter Maydell, 2015/02/05
- [Qemu-devel] [PULL 20/28] target-arm: Pass mmu_idx to get_phys_addr(), Peter Maydell, 2015/02/05
- [Qemu-devel] [PULL 23/28] target-arm: Fix brace style in reindented code, Peter Maydell, 2015/02/05
- [Qemu-devel] [PULL 12/28] hw/arm/virt: explain device-to-transport mapping in create_virtio_devices(), Peter Maydell, 2015/02/05
- [Qemu-devel] [PULL 22/28] target-arm: Reindent ancient page-table-walk code, Peter Maydell, 2015/02/05
- [Qemu-devel] [PULL 17/28] target-arm: Use correct mmu_idx for unprivileged loads and stores, Peter Maydell, 2015/02/05
- [Qemu-devel] [PULL 11/28] target-arm: check that LSB <= MSB in BFI instruction, Peter Maydell, 2015/02/05
- [Qemu-devel] [PULL 08/28] target-arm: Add checks that cpreg raw accesses are handled, Peter Maydell, 2015/02/05