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| author | Richard Henderson <richard.henderson@linaro.org> | 2019-08-26 19:00:13 -0700 |
|---|---|---|
| committer | David Gibson <david@gibson.dropbear.id.au> | 2019-08-29 09:46:07 +1000 |
| commit | cbc65a8f22b29680f30a2c86da36be4aedb88b60 (patch) | |
| tree | 81d7385d098de5db41b659b5dd833fdeb8496502 /target/ppc/translate_init.inc.c | |
| parent | ce03a193e1172ff7d4b3303ec7472dc29183db8c (diff) | |
| download | qemu-cbc65a8f22b29680f30a2c86da36be4aedb88b60.zip qemu-cbc65a8f22b29680f30a2c86da36be4aedb88b60.tar.gz qemu-cbc65a8f22b29680f30a2c86da36be4aedb88b60.tar.bz2 | |
target/ppc: Set float_tininess_before_rounding at cpu reset
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 <pc@us.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20190827020013.27154-1-richard.henderson@linaro.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'target/ppc/translate_init.inc.c')
| -rw-r--r-- | target/ppc/translate_init.inc.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/target/ppc/translate_init.inc.c b/target/ppc/translate_init.inc.c index 4a21ed7..023138c 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]; |