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authorStefan Liebler <stli@linux.vnet.ibm.com>2015-08-26 10:26:19 +0200
committerAndreas Krebbel <krebbel@linux.vnet.ibm.com>2015-08-26 10:26:19 +0200
commit4f0a1cea34c05fb2acc16f1a2d291f53230eb4fb (patch)
tree474a3cf443a605bae96d09127300e4f7204d78bc
parenta1b0488fc9df3d895a2e5eefbcd348d3f7fe0e52 (diff)
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S390: configure check for vector instruction support in assembler.
The S390 specific test checks if the assembler has support for the new z13 vector instructions by compiling a vector instruction. The .machine and .machinemode directives are needed to compile the vector instruction without -march=z13 option on 31/64 bit. On success the macro HAVE_S390_VX_ASM_SUPPORT is defined. This macro is used to determine if the optimized functions can be build without compile errors. If the used assembler lacks vector support, then a warning is dumped while configuring and only the common code functions are build. The z13 instruction support was introduced in "[Committed] S/390: Add support for IBM z13." (https://sourceware.org/ml/binutils/2015-01/msg00197.html) ChangeLog: * config.h.in (HAVE_S390_VX_ASM_SUPPORT): New macro undefine. * sysdeps/s390/configure.ac: Add test for S390 vector instruction assembler support. * sysdeps/s390/configure: Regenerated.
-rw-r--r--ChangeLog7
-rw-r--r--config.h.in3
-rw-r--r--sysdeps/s390/configure41
-rw-r--r--sysdeps/s390/configure.ac29
4 files changed, 80 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog
index c648db6..19d089a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,12 @@
2015-08-26 Stefan Liebler <stli@linux.vnet.ibm.com>
+ * config.h.in (HAVE_S390_VX_ASM_SUPPORT): New macro undefine.
+ * sysdeps/s390/configure.ac: Add test for S390 vector instruction
+ assembler support.
+ * sysdeps/s390/configure: Regenerated.
+
+2015-08-26 Stefan Liebler <stli@linux.vnet.ibm.com>
+
* sysdeps/s390/dl-procinfo.c (_dl_s390_cap_flags): Add z13.
* sysdeps/s390/dl-procinfo.h (_DL_PLATFORMS_COUNT): Increased.
diff --git a/config.h.in b/config.h.in
index 2b9aa1a..8d44b8a 100644
--- a/config.h.in
+++ b/config.h.in
@@ -91,6 +91,9 @@
/* Define if assembler supports AVX512. */
#undef HAVE_AVX512_ASM_SUPPORT
+/* Define if assembler supports vector instructions on S390. */
+#undef HAVE_S390_VX_ASM_SUPPORT
+
/* Define if assembler supports Intel MPX. */
#undef HAVE_MPX_SUPPORT
diff --git a/sysdeps/s390/configure b/sysdeps/s390/configure
index be6397e..0fa54c3 100644
--- a/sysdeps/s390/configure
+++ b/sysdeps/s390/configure
@@ -104,5 +104,46 @@ if test "$enable_lock_elision" = yes && test "$libc_cv_gcc_builtin_tbegin" = no
critic_missing="$critic_missing The used GCC has no support for __builtin_tbegin, which is needed for lock-elision on target S390."
fi
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for S390 vector instruction support" >&5
+$as_echo_n "checking for S390 vector instruction support... " >&6; }
+if ${libc_cv_asm_s390_vx+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ cat > conftest.c <<\EOF
+void testvecinsn ()
+{
+ __asm__ (".machine \"z13\" \n\t"
+ ".machinemode \"zarch_nohighgprs\" \n\t"
+ "vistrbs %%v16,%%v17 \n\t"
+ "locghie %%r1,0" : :);
+}
+EOF
+if { ac_try='${CC-cc} --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_vx=yes
+else
+ libc_cv_asm_s390_vx=no
+fi
+rm -f conftest*
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_asm_s390_vx" >&5
+$as_echo "$libc_cv_asm_s390_vx" >&6; }
+
+if test "$libc_cv_asm_s390_vx" = yes ;
+then
+ $as_echo "#define HAVE_S390_VX_ASM_SUPPORT 1" >>confdefs.h
+
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Use binutils with vector-support in order to use optimized implementations." >&5
+$as_echo "$as_me: WARNING: Use binutils with vector-support in order to use optimized implementations." >&2;}
+fi
+
+
test -n "$critic_missing" && as_fn_error $? "
*** $critic_missing" "$LINENO" 5
diff --git a/sysdeps/s390/configure.ac b/sysdeps/s390/configure.ac
index 493e9a4..4da134e 100644
--- a/sysdeps/s390/configure.ac
+++ b/sysdeps/s390/configure.ac
@@ -36,5 +36,34 @@ if test "$enable_lock_elision" = yes && test "$libc_cv_gcc_builtin_tbegin" = no
critic_missing="$critic_missing The used GCC has no support for __builtin_tbegin, which is needed for lock-elision on target S390."
fi
+
+AC_CACHE_CHECK(for S390 vector instruction support, libc_cv_asm_s390_vx, [dnl
+cat > conftest.c <<\EOF
+void testvecinsn ()
+{
+ __asm__ (".machine \"z13\" \n\t"
+ ".machinemode \"zarch_nohighgprs\" \n\t"
+ "vistrbs %%v16,%%v17 \n\t"
+ "locghie %%r1,0" : :);
+}
+EOF
+dnl
+dnl test, if assembler supports S390 vector instructions
+if AC_TRY_COMMAND([${CC-cc} --shared conftest.c -o conftest.o &> /dev/null]) ;
+then
+ libc_cv_asm_s390_vx=yes
+else
+ libc_cv_asm_s390_vx=no
+fi
+rm -f conftest* ])
+
+if test "$libc_cv_asm_s390_vx" = yes ;
+then
+ AC_DEFINE(HAVE_S390_VX_ASM_SUPPORT)
+else
+ AC_MSG_WARN([Use binutils with vector-support in order to use optimized implementations.])
+fi
+
+
test -n "$critic_missing" && AC_MSG_ERROR([
*** $critic_missing])