From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 1791) id A4368385625A; Tue, 10 May 2022 18:26:00 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org A4368385625A Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit From: Adhemerval Zanella To: glibc-cvs@sourceware.org Subject: [glibc/azanella/clang] x86: Use -mfpmath=387 iff compiler supports it X-Act-Checkin: glibc X-Git-Author: Adhemerval Zanella X-Git-Refname: refs/heads/azanella/clang X-Git-Oldrev: afbd3d4e309a7bb44d87de181bba6cd4bfe20371 X-Git-Newrev: 4d7488a17f872354a5279b7c4397066d29784639 Message-Id: <20220510182600.A4368385625A@sourceware.org> Date: Tue, 10 May 2022 18:26:00 +0000 (GMT) X-BeenThere: glibc-cvs@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Glibc-cvs mailing list List-Unsubscribe: , List-Archive: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 10 May 2022 18:26:00 -0000 https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=4d7488a17f872354a5279b7c4397066d29784639 commit 4d7488a17f872354a5279b7c4397066d29784639 Author: Adhemerval Zanella Date: Thu Mar 24 15:02:05 2022 -0300 x86: Use -mfpmath=387 iff compiler supports it Diff: --- sysdeps/x86/configure | 22 ++++++++++++++++++++++ sysdeps/x86/configure.ac | 10 ++++++++++ sysdeps/x86/fpu/Makefile | 5 ++++- 3 files changed, 36 insertions(+), 1 deletion(-) diff --git a/sysdeps/x86/configure b/sysdeps/x86/configure index a9c8c2ef67..baa5e40926 100644 --- a/sysdeps/x86/configure +++ b/sysdeps/x86/configure @@ -190,5 +190,27 @@ fi config_vars="$config_vars enable-x86-isa-level = $libc_cv_include_x86_isa_level" +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if compiler supports -mpfmath=387" >&5 +$as_echo_n "checking if compiler supports -mpfmath=387... " >&6; } +if ${libc_cv_cc_mfpmath_387+:} false; then : + $as_echo_n "(cached) " >&6 +else + if { ac_try='${CC-cc} -Werror -mfpmath=387 -xc /dev/null -S -o /dev/null' + { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5 + (eval $ac_try) 2>&5 + ac_status=$? + $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 + test $ac_status = 0; }; }; then : + libc_cv_cc_mfpmath_387="-mfpmath=387" +else + libc_cv_cc_mfpmath_387= +fi + +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_cc_mfpmath_387" >&5 +$as_echo "$libc_cv_cc_mfpmath_387" >&6; } +config_vars="$config_vars +config-cflags-mfpath-387 = $libc_cv_cc_mfpmath_387" + $as_echo "#define SUPPORT_STATIC_PIE 1" >>confdefs.h diff --git a/sysdeps/x86/configure.ac b/sysdeps/x86/configure.ac index edd43a2551..47311522ba 100644 --- a/sysdeps/x86/configure.ac +++ b/sysdeps/x86/configure.ac @@ -128,5 +128,15 @@ if test $libc_cv_include_x86_isa_level = yes; then fi LIBC_CONFIG_VAR([enable-x86-isa-level], [$libc_cv_include_x86_isa_level]) +dnl Determine if compiler supports -mfpmath=387 +AC_CACHE_CHECK([if compiler supports -mpfmath=387], + libc_cv_cc_mfpmath_387, [dnl +LIBC_TRY_CC_OPTION([-Werror -mfpmath=387], + [libc_cv_cc_mfpmath_387="-mfpmath=387"], + [libc_cv_cc_mfpmath_387=]) +]) +LIBC_CONFIG_VAR([config-cflags-mfpath-387], + [$libc_cv_cc_mfpmath_387]) + dnl Static PIE is supported. AC_DEFINE(SUPPORT_STATIC_PIE) diff --git a/sysdeps/x86/fpu/Makefile b/sysdeps/x86/fpu/Makefile index 68bd42cdd3..2d584dbfeb 100644 --- a/sysdeps/x86/fpu/Makefile +++ b/sysdeps/x86/fpu/Makefile @@ -4,7 +4,10 @@ CPPFLAGS += -I../soft-fp libm-support += powl_helper tests += test-fenv-sse test-fenv-clear-sse test-fenv-x87 test-fenv-sse-2 \ - test-flt-eval-method-387 test-flt-eval-method-sse + test-flt-eval-method-sse +ifneq ($(config-cflags-mfpath-387),) +tests += test-flt-eval-method-387 +endif CFLAGS-test-fenv-sse.c += -msse2 -mfpmath=sse CFLAGS-test-fenv-clear-sse.c += -msse2 -mfpmath=sse CFLAGS-test-fenv-sse-2.c += -msse2 -mfpmath=sse