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[Qemu-devel] [PULL 11/19] target/ppc: Set float_tininess_before_rounding
From: |
David Gibson |
Subject: |
[Qemu-devel] [PULL 11/19] target/ppc: Set float_tininess_before_rounding at cpu reset |
Date: |
Thu, 29 Aug 2019 16:08:19 +1000 |
From: Richard Henderson <address@hidden>
As defined in Power 3.0 section 4.4.4 "Underflow Exception",
a tiny result is detected before rounding.
Fixes: https://bugs.launchpad.net/qemu/+bug/1841491
Reported-by: Paul Clarke <address@hidden>
Signed-off-by: Richard Henderson <address@hidden>
Message-Id: <address@hidden>
Signed-off-by: David Gibson <address@hidden>
---
target/ppc/translate_init.inc.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/target/ppc/translate_init.inc.c b/target/ppc/translate_init.inc.c
index 4a21ed7289..023138c2f9 100644
--- a/target/ppc/translate_init.inc.c
+++ b/target/ppc/translate_init.inc.c
@@ -10461,6 +10461,10 @@ static void ppc_cpu_reset(CPUState *s)
s->exception_index = POWERPC_EXCP_NONE;
env->error_code = 0;
+ /* tininess for underflow is detected before rounding */
+ set_float_detect_tininess(float_tininess_before_rounding,
+ &env->fp_status);
+
for (i = 0; i < ARRAY_SIZE(env->spr_cb); i++) {
ppc_spr_t *spr = &env->spr_cb[i];
--
2.21.0
- [Qemu-devel] [PULL 00/19] ppc-for-4.2 queue 20190829, David Gibson, 2019/08/29
- [Qemu-devel] [PULL 03/19] ppc/pnv: add more dummy XSCOM addresses for the P9 CAPP, David Gibson, 2019/08/29
- [Qemu-devel] [PULL 05/19] ppc/pnv: Introduce PowerNV machines with fixed CPU models, David Gibson, 2019/08/29
- [Qemu-devel] [PULL 01/19] ppc/pnv: Set default ram size to 1.75GB, David Gibson, 2019/08/29
- [Qemu-devel] [PULL 07/19] ppc: Fix xsmaddmdp and friends, David Gibson, 2019/08/29
- [Qemu-devel] [PULL 06/19] tests/boot-serial-test: add support for all the PowerNV machines, David Gibson, 2019/08/29
- [Qemu-devel] [PULL 11/19] target/ppc: Set float_tininess_before_rounding at cpu reset,
David Gibson <=
- [Qemu-devel] [PULL 04/19] ppc/pnv: Generate phandle for the "interrupt-parent" property, David Gibson, 2019/08/29
- [Qemu-devel] [PULL 08/19] ppc: Fix xscvdpspn for SNAN, David Gibson, 2019/08/29
- [Qemu-devel] [PULL 10/19] pseries: Fix compat_pvr on reset, David Gibson, 2019/08/29
- [Qemu-devel] [PULL 09/19] spapr_pci: remove all child functions in function zero unplug, David Gibson, 2019/08/29
- [Qemu-devel] [PULL 12/19] target/ppc: Fix do_float_check_status vs inexact, David Gibson, 2019/08/29
- [Qemu-devel] [PULL 13/19] target/ppc: Refactor emulation of vmrgew and vmrgow instructions, David Gibson, 2019/08/29
- [Qemu-devel] [PULL 18/19] spapr/pci: Convert types to QEMU coding style, David Gibson, 2019/08/29
- [Qemu-devel] [PULL 14/19] pseries: Update SLOF firmware image, David Gibson, 2019/08/29
- [Qemu-devel] [PULL 19/19] spapr: Set compat mode in spapr_core_plug(), David Gibson, 2019/08/29
- [Qemu-devel] [PULL 15/19] powerpc/spapr: Add host threads parameter to ibm, get_system_parameter, David Gibson, 2019/08/29