File 0014-S390-Add-configure-check-to-detect-support-for-arch1.patch of Package glibc.18276

From d2341e83c8dccb008ff759148cfbe31d3d1551db Mon Sep 17 00:00:00 2001
From: Stefan Liebler <stli@linux.ibm.com>
Date: Fri, 22 Mar 2019 11:14:08 +0100
Subject: [PATCH 14/18] S390: Add configure check to detect support for arch13.

Add two configure checks which detect if arch13 is supported
by the assembler at all - by explicitely setting the machine -
and if it is supported with default settings.

ChangeLog:

	* config.h.in (HAVE_S390_MIN_ARCH13_ZARCH_ASM_SUPPORT,
	HAVE_S390_ARCH13_ASM_SUPPORT): New undefine.
	* sysdeps/s390/configure.ac: Add checks for arch13 support.
	* sysdeps/s390/configure: Regenerated.

(cherry picked from commit a899a5512f618d5c4093a2d65e8dee07c791b0ab)
---
 config.h.in               |  6 ++++
 sysdeps/s390/configure    | 71 +++++++++++++++++++++++++++++++++++++++++++++++
 sysdeps/s390/configure.ac | 49 ++++++++++++++++++++++++++++++++
 3 files changed, 126 insertions(+)

Index: glibc-2.26/config.h.in
===================================================================
--- glibc-2.26.orig/config.h.in
+++ glibc-2.26/config.h.in
@@ -78,6 +78,9 @@
 /* Define if assembler supports z13 zarch instructions as default on S390.  */
 #undef  HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT
 
+/* Define if assembler supports arch13 zarch instruction as default on S390.  */
+#undef  HAVE_S390_MIN_ARCH13_ZARCH_ASM_SUPPORT
+
 /* Define if assembler supports vector instructions on S390.  */
 #undef  HAVE_S390_VX_ASM_SUPPORT
 
@@ -85,6 +88,9 @@
    on S390.  */
 #undef  HAVE_S390_VX_GCC_SUPPORT
 
+/* Define if assembler supports arch13 instructions on S390.  */
+#undef  HAVE_S390_ARCH13_ASM_SUPPORT
+
 /* Define if assembler supports Intel MPX.  */
 #undef  HAVE_MPX_SUPPORT
 
Index: glibc-2.26/sysdeps/s390/configure
===================================================================
--- glibc-2.26.orig/sysdeps/s390/configure
+++ glibc-2.26/sysdeps/s390/configure
@@ -112,6 +112,43 @@ then
 
 fi
 
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for S390 arch13 zarch instruction support" >&5
+$as_echo_n "checking for S390 arch13 zarch instruction support... " >&6; }
+if ${libc_cv_asm_s390_arch13+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat > conftest.c <<\EOF
+void testinsn (char *buf)
+{
+    __asm__ (".machine \"arch13\" \n\t"
+	     ".machinemode \"zarch_nohighgprs\" \n\t"
+	     "lghi %%r0,16 \n\t"
+	     "mvcrl 0(%0),32(%0)" : : "a" (buf) : "memory", "r0");
+}
+EOF
+if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS --shared conftest.c
+			-o conftest.o &> /dev/null'
+  { { eval echo "\"\$as_me\":${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_asm_s390_arch13=yes
+else
+  libc_cv_asm_s390_arch13=no
+fi
+rm -f conftest*
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_asm_s390_arch13" >&5
+$as_echo "$libc_cv_asm_s390_arch13" >&6; }
+if test "$libc_cv_asm_s390_arch13" = yes ;
+then
+  $as_echo "#define HAVE_S390_ARCH13_ASM_SUPPORT 1" >>confdefs.h
+
+fi
+
+
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for S390 z10 zarch instruction support as default" >&5
 $as_echo_n "checking for S390 z10 zarch instruction support as default... " >&6; }
 if ${libc_cv_asm_s390_min_z10_zarch+:} false; then :
@@ -225,5 +262,39 @@ then
 
 fi
 
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for S390 arch13 zarch instruction support as default" >&5
+$as_echo_n "checking for S390 arch13 zarch instruction support as default... " >&6; }
+if ${libc_cv_asm_s390_min_arch13_zarch+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat > conftest.c <<\EOF
+void testinsn (char *buf)
+{
+    __asm__ ("lghi %%r0,16 \n\t"
+	     "mvcrl 0(%0),32(%0)" : : "a" (buf) : "memory", "r0");
+}
+EOF
+if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS --shared conftest.c
+			-o conftest.o &> /dev/null'
+  { { eval echo "\"\$as_me\":${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_asm_s390_min_arch13_zarch=yes
+else
+  libc_cv_asm_s390_min_arch13_zarch=no
+fi
+rm -f conftest*
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_asm_s390_min_arch13_zarch" >&5
+$as_echo "$libc_cv_asm_s390_min_arch13_zarch" >&6; }
+if test "$libc_cv_asm_s390_min_arch13_zarch" = yes ;
+then
+  $as_echo "#define HAVE_S390_MIN_ARCH13_ZARCH_ASM_SUPPORT 1" >>confdefs.h
+
+fi
+
 test -n "$critic_missing" && as_fn_error $? "
 *** $critic_missing" "$LINENO" 5
Index: glibc-2.26/sysdeps/s390/configure.ac
===================================================================
--- glibc-2.26.orig/sysdeps/s390/configure.ac
+++ glibc-2.26/sysdeps/s390/configure.ac
@@ -80,6 +80,32 @@ then
   AC_DEFINE(HAVE_S390_VX_GCC_SUPPORT)
 fi
 
+AC_CACHE_CHECK(for S390 arch13 zarch instruction support,
+	       libc_cv_asm_s390_arch13, [dnl
+cat > conftest.c <<\EOF
+void testinsn (char *buf)
+{
+    __asm__ (".machine \"arch13\" \n\t"
+	     ".machinemode \"zarch_nohighgprs\" \n\t"
+	     "lghi %%r0,16 \n\t"
+	     "mvcrl 0(%0),32(%0)" : : "a" (buf) : "memory", "r0");
+}
+EOF
+dnl test, if assembler supports S390 arch13 instructions
+if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS --shared conftest.c
+			-o conftest.o &> /dev/null]) ;
+then
+  libc_cv_asm_s390_arch13=yes
+else
+  libc_cv_asm_s390_arch13=no
+fi
+rm -f conftest* ])
+if test "$libc_cv_asm_s390_arch13" = yes ;
+then
+  AC_DEFINE(HAVE_S390_ARCH13_ASM_SUPPORT)
+fi
+
+
 AC_CACHE_CHECK(for S390 z10 zarch instruction support as default,
 	       libc_cv_asm_s390_min_z10_zarch, [dnl
 cat > conftest.c <<\EOF
@@ -163,5 +189,28 @@ then
   AC_DEFINE(HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT)
 fi
 
+AC_CACHE_CHECK(for S390 arch13 zarch instruction support as default,
+	       libc_cv_asm_s390_min_arch13_zarch, [dnl
+cat > conftest.c <<\EOF
+void testinsn (char *buf)
+{
+    __asm__ ("lghi %%r0,16 \n\t"
+	     "mvcrl 0(%0),32(%0)" : : "a" (buf) : "memory", "r0");
+}
+EOF
+dnl test, if assembler supports S390 arch13 zarch instructions as default
+if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS --shared conftest.c
+			-o conftest.o &> /dev/null]) ;
+then
+  libc_cv_asm_s390_min_arch13_zarch=yes
+else
+  libc_cv_asm_s390_min_arch13_zarch=no
+fi
+rm -f conftest* ])
+if test "$libc_cv_asm_s390_min_arch13_zarch" = yes ;
+then
+  AC_DEFINE(HAVE_S390_MIN_ARCH13_ZARCH_ASM_SUPPORT)
+fi
+
 test -n "$critic_missing" && AC_MSG_ERROR([
 *** $critic_missing])
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