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x86_64: Provide __sfp_handle_exceptions if compiler does not

This commit is contained in:
Adhemerval Zanella 2024-02-21 10:44:47 -03:00
parent b6bec7ff5e
commit 839e3cf005
4 changed files with 73 additions and 1 deletions
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3
config.h.in
View File

@ -313,4 +313,7 @@
/* Define if -mapxf is enabled by default on x86. */
#undef HAVE_X86_APX
/* Define whether compiler runtime library provides __sfp_handle_exceptions. */
#undef HAVE_X86_64_SFP_HANDLE_EXCEPTIONS
#endif

20
sysdeps/x86/fpu/sfp-machine.h
View File

@ -217,8 +217,26 @@ typedef unsigned int UTItype __attribute__ ((mode (TI)));
(FP_EX_INVALID | FP_EX_DENORM | FP_EX_DIVZERO | FP_EX_OVERFLOW \
| FP_EX_UNDERFLOW | FP_EX_INEXACT)
#ifdef HAVE_X86_64_SFP_HANDLE_EXCEPTIONS
void __sfp_handle_exceptions (int);
#else
#include <fenv.h>
static inline void __sfp_handle_exceptions (int _fex)
{
if (_fex & FP_EX_INVALID)
feraiseexcept (FE_INVALID);
if (_fex & FP_EX_DENORM)
feraiseexcept (__FE_DENORM);
if (_fex & FP_EX_DIVZERO)
feraiseexcept (FE_DIVBYZERO);
if (_fex & FP_EX_OVERFLOW)
feraiseexcept (FE_OVERFLOW);
if (_fex & FP_EX_UNDERFLOW)
feraiseexcept (FE_UNDERFLOW);
if (_fex & FP_EX_INEXACT)
feraiseexcept (FE_INEXACT);
}
#endif
#define FP_HANDLE_EXCEPTIONS \
do { \
if (__builtin_expect (_fex, 0)) \

31
sysdeps/x86_64/configure vendored
View File

@ -313,6 +313,37 @@ fi
config_vars="$config_vars
have-x86-apx = $libc_cv_x86_have_apx"
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether compiler standard library provides __sfp_handle_exceptions" >&5
printf %s "checking whether compiler standard library provides __sfp_handle_exceptions... " >&6; }
if test ${libc_cv_sfp_handle_exceptions+y}
then :
printf %s "(cached) " >&6
else $as_nop
cat > conftest.c <<EOF
int _start (void) { return 0; }
int __start (void) { return 0; }
void __sfp_handle_exceptions (int);
int main (void) { __sfp_handle_exceptions (0); return 0; }
EOF
if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $no_ssp -o conftest conftest.c -static -nostartfiles 1>&5'
{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
(eval $ac_try) 2>&5
ac_status=$?
printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
test $ac_status = 0; }; }; then
libc_cv_sfp_handle_exceptions=yes
else
libc_cv_sfp_handle_exceptions=no
fi
rm -rf conftest*
fi
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $libc_cv_sfp_handle_exceptions" >&5
printf "%s\n" "$libc_cv_sfp_handle_exceptions" >&6; }
if test x"$libc_cv_sfp_handle_exceptions" == xyes; then
printf "%s\n" "#define HAVE_X86_64_SFP_HANDLE_EXCEPTIONS 1" >>confdefs.h
fi
test -n "$critic_missing" && as_fn_error $? "
*** $critic_missing" "$LINENO" 5

20
sysdeps/x86_64/configure.ac
View File

@ -113,5 +113,25 @@ if test $libc_cv_x86_have_apx = yes; then
fi
LIBC_CONFIG_VAR([have-x86-apx], [$libc_cv_x86_have_apx])
dnl Check if compiler standard library provides __sfp_handle_exceptions, used on
dnl float128 implementation.
AC_CACHE_CHECK(whether compiler standard library provides __sfp_handle_exceptions,
libc_cv_sfp_handle_exceptions, [dnl
cat > conftest.c <<EOF
int _start (void) { return 0; }
int __start (void) { return 0; }
void __sfp_handle_exceptions (int);
int main (void) { __sfp_handle_exceptions (0); return 0; }
EOF
if AC_TRY_COMMAND(${CC-cc} $CFLAGS $CPPFLAGS $no_ssp -o conftest conftest.c -static -nostartfiles 1>&AS_MESSAGE_LOG_FD); then
libc_cv_sfp_handle_exceptions=yes
else
libc_cv_sfp_handle_exceptions=no
fi
rm -rf conftest*])
if test x"$libc_cv_sfp_handle_exceptions" == xyes; then
AC_DEFINE(HAVE_X86_64_SFP_HANDLE_EXCEPTIONS)
fi
test -n "$critic_missing" && AC_MSG_ERROR([
*** $critic_missing])