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121 lines
3.7 KiB
121 lines
3.7 KiB
From 63be4dc8f5be08f40df927377bdf0bae5239ce53 Mon Sep 17 00:00:00 2001 |
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From: Stefan Liebler <stli@linux.vnet.ibm.com> |
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Date: Thu, 27 Jul 2017 10:53:58 +0200 |
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Subject: [PATCH 01/10] S390: Configure checks |
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HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT. |
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This configure check was added upstream with commit |
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e9b424881a4f85284e56d8b561c54ff57a7c1c9b |
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"S390: Do not set FE_INEXACT with feraiseexcept (FE_OWERFLOW|FE_UNDERFLOW)." |
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HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT will be defined if gcc/assembler |
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can handle zarch z196 instructions by default. |
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Thus it is defined on s390x-glibc on RHEL 7, but not for s390-glibc. |
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ChangeLog: |
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* config.h.in (HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT): |
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New undefine. |
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* sysdeps/s390/configure.ac: Add test for z196 zarch support. |
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* sysdeps/s390/configure: Regenerated. |
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--- |
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config.h.in | 3 +++ |
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sysdeps/s390/configure | 36 ++++++++++++++++++++++++++++++++++++ |
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sysdeps/s390/configure.in | 26 ++++++++++++++++++++++++++ |
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3 files changed, 65 insertions(+) |
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diff --git a/config.h.in b/config.h.in |
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index 66ac85a..07bc713 100644 |
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--- a/config.h.in |
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+++ b/config.h.in |
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@@ -110,6 +110,9 @@ |
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/* Define if assembler supports Intel MPX. */ |
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#undef HAVE_MPX_SUPPORT |
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+/* Define if assembler supports z196 zarch instructions as default on S390. */ |
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+#undef HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT |
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+ |
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/* Define if assembler supports vector instructions on S390. */ |
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#undef HAVE_S390_VX_ASM_SUPPORT |
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diff --git a/sysdeps/s390/configure b/sysdeps/s390/configure |
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index eb49a4c..bb670f3 100644 |
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--- a/sysdeps/s390/configure |
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+++ b/sysdeps/s390/configure |
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@@ -75,3 +75,39 @@ 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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+ |
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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 "$libc_cv_asm_s390_min_z196_zarch" >&6; } |
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+ |
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+if test "$libc_cv_asm_s390_min_z196_zarch" = yes ; |
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+then |
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+ $as_echo "#define HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT 1" >>confdefs.h |
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+ |
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+fi |
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diff --git a/sysdeps/s390/configure.in b/sysdeps/s390/configure.in |
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index a3b1f25..bad92bd 100644 |
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--- a/sysdeps/s390/configure.in |
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+++ b/sysdeps/s390/configure.in |
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@@ -53,3 +53,29 @@ if test "$libc_cv_gcc_s390_vx" = yes ; |
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then |
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AC_DEFINE(HAVE_S390_VX_GCC_SUPPORT) |
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fi |
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+ |
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+AC_CACHE_CHECK(for S390 z196 zarch instruction support as default, |
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+ libc_cv_asm_s390_min_z196_zarch, [dnl |
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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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+dnl |
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+dnl test, if assembler supports S390 z196 zarch instructions as default |
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+if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS --shared conftest.c |
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+ -o conftest.o &> /dev/null]) ; |
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+then |
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+ libc_cv_asm_s390_min_z196_zarch=yes |
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+else |
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+ libc_cv_asm_s390_min_z196_zarch=no |
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+fi |
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+rm -f conftest* ]) |
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+ |
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+if test "$libc_cv_asm_s390_min_z196_zarch" = yes ; |
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+then |
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+ AC_DEFINE(HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT) |
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+fi |
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-- |
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1.8.3.1 |
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