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| author | Stefan Liebler <stli@linux.vnet.ibm.com> | 2016-08-31 14:54:55 +0200 |
|---|---|---|
| committer | Stefan Liebler <stli@linux.vnet.ibm.com> | 2016-08-31 14:54:55 +0200 |
| commit | e9b424881a4f85284e56d8b561c54ff57a7c1c9b (patch) | |
| tree | f039d44b1026ba426ef87f128c85e2abdb224f36 /ChangeLog | |
| parent | aaf30454802855d439f3d4d1a12fd6b905621029 (diff) | |
| download | glibc-e9b424881a4f85284e56d8b561c54ff57a7c1c9b.zip glibc-e9b424881a4f85284e56d8b561c54ff57a7c1c9b.tar.gz glibc-e9b424881a4f85284e56d8b561c54ff57a7c1c9b.tar.bz2 | |
S390: Do not set FE_INEXACT with feraiseexcept (FE_OWERFLOW|FE_UNDERFLOW).
On s390 feraiseexcept (FE_OVERFLOW|FE_UNDERFLOW) sets FE_INEXACT, too.
This patch uses z196 zarch load rounded instruction which can suppress
FE_INEXACT exception if gcc has z196 support in used configuration.
Otherwise FE_INEXACT flag is set as before. The gcc support is tested
in a new configure-check.
A comment in fsetexcptflg.c is corrected as new exceptions are not
executed with the next floating-point instruction if fpc is set with
_FPU_SETCW macro. It seems the comment was copied e.g. from
sysdeps/x86_64/fpu/fsetexcptflg.c file.
ChangeLog:
* config.h.in (HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT):
New undefine.
* sysdeps/s390/configure.ac: Add test for z196 zarch support.
* sysdeps/s390/configure: Regenerated.
* sysdeps/s390/fpu/fraiseexcpt.c (__feraiseexcept): Use ledbra
instruction for raising over-/underflow if z196 zarch is supported
by default.
* sysdeps/s390/fpu/fsetexcptflg.c (fesetexceptflag):
Correct comment.
Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 10 |
1 files changed, 10 insertions, 0 deletions
@@ -1,3 +1,13 @@ +2016-08-31 Stefan Liebler <stli@linux.vnet.ibm.com> + + * config.h.in (HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT): New undefine. + * sysdeps/s390/configure.ac: Add test for z196 zarch support. + * sysdeps/s390/configure: Regenerated. + * sysdeps/s390/fpu/fraiseexcpt.c (__feraiseexcept): Use ledbra + instruction for raising over-/underflow if z196 zarch is supported + by default. + * sysdeps/s390/fpu/fsetexcptflg.c (fesetexceptflag): Correct comment. + 2016-08-30 Svante Signell <svante.signell@gmail.com> * sysdeps/mach/hurd/adjtime.c (__adjtime): When OLDDELTA is NULL, make |