[AArch64 1/3 big.LITTLE] Driver rewriting of big.LITTLE names.

gcc/

	* common/config/aarch64/aarch64-common.c
	(aarch64_rewrite_selected_cpu): New.
	(aarch64_rewrite_mcpu): New.
	* config/aarch64/aarch64-protos.h
	(aarch64_rewrite_selected_cpu): New.
	* config/aarch64/aarch64.h (BIG_LITTLE_SPEC): New.
	(BIG_LITTLE_SPEC_FUNCTIONS): Likewise.
	(ASM_CPU_SPEC): Likewise.
	(EXTRA_SPEC_FUNCTIONS): Likewise.
	(EXTRA_SPECS): Likewise.
	(ASM_SPEC): Likewise.
	* config/aarch64/aarch64.c (aarch64_start_file): Rewrite target
	CPU name.

From-SVN: r206098

1 files changed, 35 insertions, 0 deletions

diff --git a/gcc/common/config/aarch64/aarch64-common.c b/gcc/common/config/aarch64/aarch64-common.c
index 9c8e770..19acce1 100644
--- a/gcc/common/config/aarch64/aarch64-common.c
+++ b/gcc/common/config/aarch64/aarch64-common.c
@@ -88,3 +88,38 @@ aarch64_handle_option (struct gcc_options *opts,
 }
 
 struct gcc_targetm_common targetm_common = TARGETM_COMMON_INITIALIZER;
+
+#define AARCH64_CPU_NAME_LENGTH 20
+
+/* Truncate NAME at the first '.' character seen, or return
+   NAME unmodified.  */
+
+const char *
+aarch64_rewrite_selected_cpu (const char *name)
+{
+  static char output_buf[AARCH64_CPU_NAME_LENGTH + 1] = {0};
+  char *arg_pos;
+
+  strncpy (output_buf, name, AARCH64_CPU_NAME_LENGTH);
+  arg_pos = strchr (output_buf, '.');
+
+  /* If we found a '.' truncate the entry at that point.  */
+  if (arg_pos)
+    *arg_pos = '\0';
+
+  return output_buf;
+}
+
+/* Called by the driver to rewrite a name passed to the -mcpu
+   argument in preparation to be passed to the assembler.  The
+   name will be in ARGV[0], ARGC should always be 1.  */
+
+const char *
+aarch64_rewrite_mcpu (int argc, const char **argv)
+{
+  gcc_assert (argc == 1);
+  return aarch64_rewrite_selected_cpu (argv[0]);
+}
+
+#undef AARCH64_CPU_NAME_LENGTH
+