issue: 1557652 Set BF write method basing on CPU instructions set

config/m4/compiler.m4

@@ -0,0 +1,53 @@
+# compiler.m4 - Parsing compiler capabilities
+#
+# Copyright (C) Mellanox Technologies Ltd. 2001-2018.  ALL RIGHTS RESERVED.
+# See file LICENSE for terms.
+#
+
+
+# Check compiler specific attributes
+# Usage: CHECK_COMPILER_ATTRIBUTE([attribute], [program], [definition])
+# Note:
+# - [definition] can be omitted if it is equal to attribute
+#
+AC_DEFUN([CHECK_COMPILER_ATTRIBUTE], [
+    AC_CACHE_VAL(vma_cv_attribute_[$1], [
+        #
+        # Try to compile using the C compiler
+        #
+        AC_TRY_COMPILE([$2],[],
+                       [vma_cv_attribute_$1=yes],
+                       [vma_cv_attribute_$1=no])
+        AS_IF([test "x$vma_cv_attribute_$1" = "xyes"], [
+            AC_LANG_PUSH(C++)
+            AC_TRY_COMPILE([extern "C" {
+                           $2
+                           }],[],
+                           [vma_cv_attribute_$1=yes],
+                           [vma_cv_attribute_$1=no])
+            AC_LANG_POP(C++)
+        ])
+    ])
+
+    AC_MSG_CHECKING([for attribute $1])
+    AC_MSG_RESULT([$vma_cv_attribute_$1])
+    AS_IF([test "x$vma_cv_attribute_$1" = "xyes"], [
+        AS_IF([test "x$3" = "x"],
+            [AC_DEFINE_UNQUOTED([DEFINED_$1], [1], [Define to 1 if attribute $1 is supported])],
+            [AC_DEFINE_UNQUOTED([DEFINED_$3], [1], [Define to 1 if attribute $1 is supported])]
+        )
+    ])
+])
+
+
+
+##########################
+# Set compiler capabilities
+#
+AC_DEFUN([COMPILER_CAPABILITY_SETUP],
+[
+
+CHECK_COMPILER_ATTRIBUTE([optimize],
+                         [int foo (int arg) __attribute__ ((optimize("O0")));],
+                         [ATTRIBUTE_OPTIMIZE])
+])

configure.ac

@@ -88,6 +88,7 @@ m4_include([config/m4/opt.m4])
 m4_include([config/m4/verbs.m4])
 m4_include([config/m4/nl.m4])
 m4_include([config/m4/prof.m4])
+m4_include([config/m4/compiler.m4])
 
 FUNC_CONFIGURE_INIT()
 
@@ -163,6 +164,7 @@ case $CC in
         ;;
 esac
 
+COMPILER_CAPABILITY_SETUP()
 
 dnl===-----------------------------------------------------------------------===
 dnl===
@@ -376,22 +378,6 @@ dnl===
 dnl===-----------------------------------------------------------------------===
 show_section_title "Check for functions, types and structures"
 
-# Does this compiler have built-in functions for atomic memory access?
-AC_MSG_CHECKING([for atomic memory access (__sync_bool_compare_and_swap) support])
-AC_TRY_LINK(,
-[
-  int variable = 1;
-  return (__sync_bool_compare_and_swap(&variable, 1, 2)
-         && __sync_add_and_fetch(&variable, 1)) ? 1 : 0;
-],
-[
-  AC_MSG_RESULT([yes])
-  AC_DEFINE(HAVE_BUILTIN_ATOMIC, 1, [Define to 1 if gcc supports __sync_bool_compare_and_swap() a.o.])
-],
-[
-  AC_MSG_RESULT([no])
-])
-
 AC_MSG_CHECKING([for SOF_TIMESTAMPING_SOFTWARE support])
 AC_TRY_LINK(
 #include <linux/net_tstamp.h>

src/utils/Makefile.am

@@ -13,7 +13,8 @@ libutils_la_SOURCES = \
 	clock.h \
 	lock_wrapper.h \
 	rdtsc.h \
-	types.h
+	types.h \
+	compiler.h
 
 noinst_PROGRAMS = timetest
 timetest_LDADD = -lrt libutils.la

src/utils/asm-arm64.h

@@ -37,32 +37,12 @@
 #include <stdint.h>
 #include <unistd.h>
 
-#define COPY_64B_NT(dst, src)	\
-	*dst++ = *src++;	\
-	*dst++ = *src++;	\
-	*dst++ = *src++;	\
-	*dst++ = *src++;	\
-	*dst++ = *src++;	\
-	*dst++ = *src++;	\
-	*dst++ = *src++;	\
-	*dst++ = *src++
 
 #define mb()	asm volatile("dsb sy" ::: "memory")
 #define rmb()	asm volatile("dsb ld" ::: "memory")
 #define wmb()	asm volatile("dsb st" ::: "memory")
 #define wc_wmb() wmb()
 
-/**
- * Add to the atomic variable.
- * @param i integer value to add.
- * @param v pointer of type atomic_t.
- * @return Value before add.
- */
-static inline int atomic_fetch_and_add(int i, volatile int *ptr)
-{
-	return __atomic_fetch_add(ptr, i, __ATOMIC_ACQUIRE);
-}
-
 /**
  * Read RDTSC register
  */
@@ -94,6 +74,4 @@ static inline void prefetch_range(void *addr, size_t len)
 		prefetch(cp);
 }
 
-
-
 #endif

src/utils/asm-ppc64.h

@@ -37,36 +37,12 @@
 #include <stdint.h>
 #include <unistd.h>
 
-#define COPY_64B_NT(dst, src)	\
-	*dst++ = *src++;	\
-	*dst++ = *src++;	\
-	*dst++ = *src++;	\
-	*dst++ = *src++;	\
-	*dst++ = *src++;	\
-	*dst++ = *src++;	\
-	*dst++ = *src++;	\
-	*dst++ = *src++
 
 #define mb()	 asm volatile("sync" ::: "memory")
 #define rmb()	 asm volatile("lwsync" ::: "memory")
 #define wmb()	 rmb()
 #define wc_wmb() mb()
 
-/**
- * Add to the atomic variable.
- * @param i integer value to add.
- * @param v pointer of type atomic_t.
- * @return Value before add.
- */
-static inline int atomic_fetch_and_add(int i, volatile int *ptr)
-{
-#ifdef __ATOMIC_ACQUIRE
-	return __atomic_fetch_add(ptr, i, __ATOMIC_ACQUIRE);
-#else
-        return __sync_fetch_and_add(ptr, i);
-#endif
-}
-
 
 /**
  * Read RDTSC register
@@ -97,6 +73,4 @@ static inline void prefetch_range(void *addr, size_t len)
 		prefetch(cp);
 }
 
-
-
 #endif