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[Qemu-devel] [PATCH] target/ppc: Set float_tininess_before_rounding at c
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PATCH] target/ppc: Set float_tininess_before_rounding at cpu reset |
Date: |
Mon, 26 Aug 2019 19:00:13 -0700 |
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>
---
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];
--
2.17.1
- [Qemu-devel] [PATCH] target/ppc: Set float_tininess_before_rounding at cpu reset,
Richard Henderson <=