diff options
| -rw-r--r-- | ChangeLog | 10 | ||||
| -rw-r--r-- | sysdeps/generic/math_private.h | 9 |
2 files changed, 15 insertions, 4 deletions
@@ -1,3 +1,13 @@ +2018-01-11 Joseph Myers <joseph@codesourcery.com> + + [BZ #22702] + * sysdeps/generic/math_private.h (libc_feresetround_noex): Update + comment to say exceptions are discarded. + (libc_feholdsetround_noex_ctx): Use __feholdexcept instead of + __fegetenv. + (SET_RESTORE_ROUND_NOEX): Update comment to say non-stop mode must + be enabled. + 2018-01-11 Florian Weimer <fweimer@redhat.com> * sysdeps/gnu/unwind-resume.c (__libgcc_s_init): Update comment diff --git a/sysdeps/generic/math_private.h b/sysdeps/generic/math_private.h index f29898c..e4b9d86 100644 --- a/sysdeps/generic/math_private.h +++ b/sysdeps/generic/math_private.h @@ -498,7 +498,7 @@ default_libc_feupdateenv_test (fenv_t *e, int ex) # define libc_feresetroundl libc_feupdateenvl #endif -/* ... and a version that may also discard exceptions. */ +/* ... and a version that also discards exceptions. */ #ifndef libc_feresetround_noex # define libc_feresetround_noex libc_fesetenv @@ -572,8 +572,9 @@ libc_feresetround_ctx (struct rm_ctx *ctx) static __always_inline void libc_feholdsetround_noex_ctx (struct rm_ctx *ctx, int round) { - /* Save exception flags and rounding mode. */ - __fegetenv (&ctx->env); + /* Save exception flags and rounding mode, and disable exception + traps. */ + __feholdexcept (&ctx->env); /* Update rounding mode only if different. */ if (__glibc_unlikely (round != get_rounding_mode ())) @@ -626,7 +627,7 @@ libc_feresetround_noex_ctx (struct rm_ctx *ctx) the value at the start of the block. The exception mode must be preserved. Exceptions raised within the block must be discarded, and exception flags are restored to the value at the start of the block. - Non-stop mode may be enabled inside the block. */ + Non-stop mode must be enabled inside the block. */ #define SET_RESTORE_ROUND_NOEX(RM) \ SET_RESTORE_ROUND_GENERIC (RM, libc_feholdsetround_noex, \ |