re PR libfortran/78379 (Processor-specific versions for matmul)

2017-05-25  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR libfortran/78379
	* Makefile.am: Add generated/matmulavx128_*.c files.
	Handle them for compiling and setting the right flags.
	* acinclude.m4: Add tests for FMA3, FMA4 and AVX128.
	* configure.ac: Call them.
	* Makefile.in: Regenerated.
	* config.h.in: Regenerated.
	* configure: Regenerated.
	* m4/matmul.m4:  Handle AMD chips by calling 128-bit AVX
	versions which use FMA3 or FMA4.
	* m4/matmulavx128.m4: New file.
        * generated/matmul_c10.c: Regenerated.
        * generated/matmul_c16.c: Regenerated.
        * generated/matmul_c4.c: Regenerated.
        * generated/matmul_c8.c: Regenerated.
        * generated/matmul_i1.c: Regenerated.
        * generated/matmul_i16.c: Regenerated.
        * generated/matmul_i2.c: Regenerated.
        * generated/matmul_i4.c: Regenerated.
        * generated/matmul_i8.c: Regenerated.
        * generated/matmul_r10.c: Regenerated.
        * generated/matmul_r16.c: Regenerated.
        * generated/matmul_r4.c: Regenerated.
        * generated/matmul_r8.c: Regenerated.
        * generated/matmulavx128_c10.c: New file.
        * generated/matmulavx128_c16.c: New file.
        * generated/matmulavx128_c4.c: New file.
        * generated/matmulavx128_c8.c: New file.
        * generated/matmulavx128_i1.c: New file.
        * generated/matmulavx128_i16.c: New file.
        * generated/matmulavx128_i2.c: New file.
        * generated/matmulavx128_i4.c: New file.
        * generated/matmulavx128_i8.c: New file.
        * generated/matmulavx128_r10.c: New file.
        * generated/matmulavx128_r16.c: New file.
        * generated/matmulavx128_r4.c: New file.
        * generated/matmulavx128_r8.c: New file.

From-SVN: r248472

1 files changed, 101 insertions, 2 deletions

diff --git a/libgfortran/configure b/libgfortran/configure
index 81238fcb79c..36e015594ba 100755
--- a/libgfortran/configure
+++ b/libgfortran/configure
@@ -606,6 +606,8 @@ am__EXEEXT_TRUE
 LTLIBOBJS
 LIBOBJS
 get_gcc_base_ver
+HAVE_AVX128_FALSE
+HAVE_AVX128_TRUE
 IEEE_FLAGS
 IEEE_SUPPORT
 IEEE_SUPPORT_FALSE
@@ -12421,7 +12423,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 12424 "configure"
+#line 12426 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -12527,7 +12529,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 12530 "configure"
+#line 12532 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -26363,6 +26365,99 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
   CFLAGS="$ac_save_CFLAGS"
 
 
+# Check for FMA3 extensions
+
+  ac_save_CFLAGS="$CFLAGS"
+  CFLAGS="-O2 -mfma -mno-fma4"
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+	float
+	flt_mul_add (float a, float b, float c)
+	{
+		return __builtin_fmaf (a, b, c);
+        }
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+
+$as_echo "#define HAVE_FMA3 1" >>confdefs.h
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+  CFLAGS="$ac_save_CFLAGS"
+
+
+# Check for FMA4 extensions
+
+  ac_save_CFLAGS="$CFLAGS"
+  CFLAGS="-O2 -mfma4 -mno-fma"
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+	float
+	flt_mul_add (float a, float b, float c)
+	{
+		return __builtin_fmaf (a, b, c);
+        }
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+
+$as_echo "#define HAVE_FMA4 1" >>confdefs.h
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+  CFLAGS="$ac_save_CFLAGS"
+
+
+# Check if AVX128 works
+
+  ac_save_CFLAGS="$CFLAGS"
+  CFLAGS="-O2 -mavx -mprefer-avx128"
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+        void foo()
+	{
+        }
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+
+$as_echo "#define HAVE_AVX128 1" >>confdefs.h
+
+	 if true; then
+  HAVE_AVX128_TRUE=
+  HAVE_AVX128_FALSE='#'
+else
+  HAVE_AVX128_TRUE='#'
+  HAVE_AVX128_FALSE=
+fi
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+  CFLAGS="$ac_save_CFLAGS"
+
+
 # Determine what GCC version number to use in filesystem paths.
 
   get_gcc_base_ver="cat"
@@ -26615,6 +26710,10 @@ if test -z "${IEEE_SUPPORT_TRUE}" && test -z "${IEEE_SUPPORT_FALSE}"; then
   as_fn_error "conditional \"IEEE_SUPPORT\" was never defined.
 Usually this means the macro was only invoked conditionally." "$LINENO" 5
 fi
+if test -z "${HAVE_AVX128_TRUE}" && test -z "${HAVE_AVX128_FALSE}"; then
+  as_fn_error "conditional \"HAVE_AVX128\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
 
 : ${CONFIG_STATUS=./config.status}
 ac_write_fail=0