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e9b424881a
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.
218 lines
6.3 KiB
Plaintext
218 lines
6.3 KiB
Plaintext
# This file is generated from configure.ac by Autoconf. DO NOT EDIT!
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# Local configure fragment for sysdeps/s390.
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$as_echo "#define PI_STATIC_AND_HIDDEN 1" >>confdefs.h
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for ac_prog in $AS
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do
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# Extract the first word of "$ac_prog", so it can be a program name with args.
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set dummy $ac_prog; ac_word=$2
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
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$as_echo_n "checking for $ac_word... " >&6; }
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if ${ac_cv_prog_AS+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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if test -n "$AS"; then
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ac_cv_prog_AS="$AS" # Let the user override the test.
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else
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as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
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for as_dir in $PATH
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do
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IFS=$as_save_IFS
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test -z "$as_dir" && as_dir=.
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for ac_exec_ext in '' $ac_executable_extensions; do
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if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
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ac_cv_prog_AS="$ac_prog"
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$as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
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break 2
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fi
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done
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done
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IFS=$as_save_IFS
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fi
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fi
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AS=$ac_cv_prog_AS
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if test -n "$AS"; then
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $AS" >&5
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$as_echo "$AS" >&6; }
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else
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
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$as_echo "no" >&6; }
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fi
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test -n "$AS" && break
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done
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if test -z "$AS"; then
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ac_verc_fail=yes
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else
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# Found it, now check the version.
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking version of $AS" >&5
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$as_echo_n "checking version of $AS... " >&6; }
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ac_prog_version=`$AS --version 2>&1 | sed -n 's/^.*GNU assembler.* \([0-9]*\.[0-9.]*\).*$/\1/p'`
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case $ac_prog_version in
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'') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
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2.2[4-9]*|2.[3-9][0-9]*|[3-9].*|[1-9][0-9]*)
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ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
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*) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
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esac
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_prog_version" >&5
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$as_echo "$ac_prog_version" >&6; }
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fi
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if test $ac_verc_fail = yes; then
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critic_missing="$critic_missing The program AS is required in version >= 2.24 for target S390."
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for __builtin_tbegin" >&5
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$as_echo_n "checking for __builtin_tbegin... " >&6; }
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if ${libc_cv_gcc_builtin_tbegin+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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cat > conftest.c <<\EOF
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#include <htmintrin.h>
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void testtransaction ()
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{
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if (__builtin_tbegin (0) == _HTM_TBEGIN_STARTED)
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{
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__builtin_tend ();
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}
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}
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EOF
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if { ac_try='${CC-cc} -mhtm -O2 -S conftest.c -o - | grep -w tbegin > /dev/null'
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{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
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test $ac_status = 0; }; } ;
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then
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libc_cv_gcc_builtin_tbegin=yes
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else
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libc_cv_gcc_builtin_tbegin=no
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fi
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rm -f conftest*
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_gcc_builtin_tbegin" >&5
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$as_echo "$libc_cv_gcc_builtin_tbegin" >&6; }
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if test "$enable_lock_elision" = yes && test "$libc_cv_gcc_builtin_tbegin" = no ; then
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critic_missing="$critic_missing The used GCC has no support for __builtin_tbegin, which is needed for lock-elision on target S390."
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for S390 vector instruction support" >&5
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$as_echo_n "checking for S390 vector instruction support... " >&6; }
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if ${libc_cv_asm_s390_vx+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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cat > conftest.c <<\EOF
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void testvecinsn ()
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{
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__asm__ (".machine \"z13\" \n\t"
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".machinemode \"zarch_nohighgprs\" \n\t"
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"vistrbs %%v16,%%v17 \n\t"
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"locghie %%r1,0" : :);
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}
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EOF
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if { ac_try='${CC-cc} --shared conftest.c -o conftest.o &> /dev/null'
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{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
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test $ac_status = 0; }; } ;
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then
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libc_cv_asm_s390_vx=yes
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else
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libc_cv_asm_s390_vx=no
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fi
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rm -f conftest*
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_asm_s390_vx" >&5
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$as_echo "$libc_cv_asm_s390_vx" >&6; }
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if test "$libc_cv_asm_s390_vx" = yes ;
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then
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$as_echo "#define HAVE_S390_VX_ASM_SUPPORT 1" >>confdefs.h
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else
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{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Use binutils with vector-support in order to use optimized implementations." >&5
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$as_echo "$as_me: WARNING: Use binutils with vector-support in order to use optimized implementations." >&2;}
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for S390 vector support in gcc" >&5
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$as_echo_n "checking for S390 vector support in gcc... " >&6; }
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if ${libc_cv_gcc_s390_vx+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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cat > conftest.c <<\EOF
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void testvecclobber ()
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{
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__asm__ ("" : : : "v16");
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}
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EOF
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if { ac_try='${CC-cc} --shared conftest.c -o conftest.o &> /dev/null'
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{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
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test $ac_status = 0; }; } ;
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then
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libc_cv_gcc_s390_vx=yes
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else
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libc_cv_gcc_s390_vx=no
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fi
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rm -f conftest*
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_gcc_s390_vx" >&5
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$as_echo "$libc_cv_gcc_s390_vx" >&6; }
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if test "$libc_cv_gcc_s390_vx" = yes ;
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then
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$as_echo "#define HAVE_S390_VX_GCC_SUPPORT 1" >>confdefs.h
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for S390 z196 zarch instruction support as default" >&5
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$as_echo_n "checking for S390 z196 zarch instruction support as default... " >&6; }
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if ${libc_cv_asm_s390_min_z196_zarch+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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cat > conftest.c <<\EOF
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float testinsn (double e)
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{
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float d;
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__asm__ ("ledbra %0,5,%1,4" : "=f" (d) : "f" (e) );
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return d;
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}
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EOF
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if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS --shared conftest.c
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-o conftest.o &> /dev/null'
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{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
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test $ac_status = 0; }; } ;
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then
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libc_cv_asm_s390_min_z196_zarch=yes
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else
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libc_cv_asm_s390_min_z196_zarch=no
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fi
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rm -f conftest*
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_asm_s390_min_z196_zarch" >&5
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$as_echo "$libc_cv_asm_s390_min_z196_zarch" >&6; }
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if test "$libc_cv_asm_s390_min_z196_zarch" = yes ;
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then
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$as_echo "#define HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT 1" >>confdefs.h
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fi
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test -n "$critic_missing" && as_fn_error $? "
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*** $critic_missing" "$LINENO" 5
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