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authorAleksandar Markovic <aleksandar.markovic@imgtec.com>2016-06-10 11:57:33 +0200
committerLeon Alrae <leon.alrae@imgtec.com>2016-06-24 13:41:45 +0100
commit40bd6dd456e61a36e454fb9dd2cc739b67c224cf (patch)
tree9e88aa05324c4ed927399922283e148fa107d936 /target-mips
parent52d4c8ee93cc599fecf817d403f125f4c7c036c6 (diff)
downloadqemu-arm-40bd6dd456e61a36e454fb9dd2cc739b67c224cf.tar.gz
target-mips: Activate IEEE 754-2008 signaling NaN bit meaning for MSA
Function msa_reset() is updated so that flag snan_bit_is_one is properly set to 0. By applying this patch, a number of incorrect MSA behaviors that require IEEE 754-2008 compliance will be fixed. Those are behaviors that (up to the moment of applying this patch) did not get the desired functionality from SoftFloat library with respect to distinguishing between quiet and signaling NaN, getting default NaN values (both quiet and signaling), establishing if a floating point number is NaN or not, etc. Two examples: * FMAX, FMIN will now correctly detect and propagate NaNs. * FCLASS.D ans FCLASS.S will now correcty detect NaN flavors. Signed-off-by: Aleksandar Markovic <aleksandar.markovic@imgtec.com> Reviewed-by: Leon Alrae <leon.alrae@imgtec.com> Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
Diffstat (limited to 'target-mips')
-rw-r--r--target-mips/translate_init.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/target-mips/translate_init.c b/target-mips/translate_init.c
index e81a831117..a37d8bb60c 100644
--- a/target-mips/translate_init.c
+++ b/target-mips/translate_init.c
@@ -893,5 +893,6 @@ static void msa_reset(CPUMIPSState *env)
/* clear float_status nan mode */
set_default_nan_mode(0, &env->active_tc.msa_fp_status);
- set_snan_bit_is_one(1, &env->active_tc.msa_fp_status);
+ /* set proper signanling bit meaning ("1" means "quiet") */
+ set_snan_bit_is_one(0, &env->active_tc.msa_fp_status);
}