[PATCHv2 1/7] gcc/arc: Add support for nps400 cpu type.

[Andrew Burgess <andrew.burgess@embecosm.com>]

The nps400 is an arc700 with a set of extension instructions produced by
Mellanox (formally EZChip).  This commit adds support for the nps400
architecture to the arc backend.

After this commit it is possible to compile using -mcpu=nps400 in order
to specialise for the nps400.  Later commits add support for the
specific extension instructions.

gcc/ChangeLog:

	* common/config/arc/arc-common.c (arc_handle_option): Add NPS400
	support, setup defaults.
	* config/arc/arc-opts.h (enum processor_type): Add NPS400.
	* config/arc/arc.c (arc_init): Add NPS400 support.
	* config/arc/arc.h (CPP_SPEC): Add NPS400 defines.
	(TARGET_ARC700): NPS400 is also an ARC700.
	* config/arc/arc.opt: Add NPS400 options to -mcpu=.
---
 gcc/ChangeLog.NPS400               | 9 +++++++++
 gcc/common/config/arc/arc-common.c | 4 ++++
 gcc/config/arc/arc-opts.h          | 1 +
 gcc/config/arc/arc.c               | 5 +++++
 gcc/config/arc/arc.h               | 5 ++++-
 gcc/config/arc/arc.opt             | 6 ++++++
 6 files changed, 29 insertions(+), 1 deletion(-)
 create mode 100644 gcc/ChangeLog.NPS400

diff --git a/gcc/common/config/arc/arc-common.c b/gcc/common/config/arc/arc-common.c
index 64fb053..f5b9c6d 100644
--- a/gcc/common/config/arc/arc-common.c
+++ b/gcc/common/config/arc/arc-common.c
@@ -83,6 +83,10 @@ arc_handle_option (struct gcc_options *opts, struct gcc_options *opts_set,
 
       switch (value)
 	{
+	case PROCESSOR_NPS400:
+	  if (! (opts_set->x_TARGET_CASE_VECTOR_PC_RELATIVE) )
+	    opts->x_TARGET_CASE_VECTOR_PC_RELATIVE = 1;
+	  /* Fall through */
 	case PROCESSOR_ARC600:
 	case PROCESSOR_ARC700:
 	  if (! (opts_set->x_target_flags & MASK_BARREL_SHIFTER) )
diff --git a/gcc/config/arc/arc-opts.h b/gcc/config/arc/arc-opts.h
index 1e11ebc4..cbd7898 100644
--- a/gcc/config/arc/arc-opts.h
+++ b/gcc/config/arc/arc-opts.h
@@ -24,6 +24,7 @@ enum processor_type
   PROCESSOR_ARC600,
   PROCESSOR_ARC601,
   PROCESSOR_ARC700,
+  PROCESSOR_NPS400,
   PROCESSOR_ARCEM,
   PROCESSOR_ARCHS
 };
diff --git a/gcc/config/arc/arc.c b/gcc/config/arc/arc.c
index d60db50..ae8772e 100644
--- a/gcc/config/arc/arc.c
+++ b/gcc/config/arc/arc.c
@@ -649,6 +649,11 @@ arc_init (void)
       tune_dflt = TUNE_ARC700_4_2_STD;
       break;
 
+    case PROCESSOR_NPS400:
+      arc_cpu_string = "NPS400";
+      tune_dflt = TUNE_ARC700_4_2_STD;
+      break;
+
     case PROCESSOR_ARCEM:
       arc_cpu_string = "EM";
       break;
diff --git a/gcc/config/arc/arc.h b/gcc/config/arc/arc.h
index 1c2a38d..f96bf0f 100644
--- a/gcc/config/arc/arc.h
+++ b/gcc/config/arc/arc.h
@@ -136,6 +136,8 @@ along with GCC; see the file COPYING3.  If not see
 %{mdsp-packa:-D__Xdsp_packa} %{mcrc:-D__Xcrc} %{mdvbf:-D__Xdvbf} \
 %{mtelephony:-D__Xtelephony} %{mxy:-D__Xxy} %{mmul64: -D__Xmult32} \
 %{mlock:-D__Xlock} %{mswape:-D__Xswape} %{mrtsc:-D__Xrtsc} \
+%{mcpu=NPS400:-D__NPS400__} \
+%{mcpu=nps400:-D__NPS400__} \
 "
 
 #define CC1_SPEC "\
@@ -297,7 +299,8 @@ along with GCC; see the file COPYING3.  If not see
 
 #define TARGET_ARC600 (arc_cpu == PROCESSOR_ARC600)
 #define TARGET_ARC601 (arc_cpu == PROCESSOR_ARC601)
-#define TARGET_ARC700 (arc_cpu == PROCESSOR_ARC700)
+#define TARGET_ARC700 (arc_cpu == PROCESSOR_ARC700	\
+		       || arc_cpu == PROCESSOR_NPS400)
 #define TARGET_EM     (arc_cpu == PROCESSOR_ARCEM)
 #define TARGET_HS     (arc_cpu == PROCESSOR_ARCHS)
 #define TARGET_V2							\
diff --git a/gcc/config/arc/arc.opt b/gcc/config/arc/arc.opt
index 2227b75..14fd2a4 100644
--- a/gcc/config/arc/arc.opt
+++ b/gcc/config/arc/arc.opt
@@ -189,6 +189,12 @@ EnumValue
 Enum(processor_type) String(arc700) Value(PROCESSOR_ARC700)
 
 EnumValue
+Enum(processor_type) String(nps400) Value(PROCESSOR_NPS400)
+
+EnumValue
+Enum(processor_type) String(NPS400) Value(PROCESSOR_NPS400)
+
+EnumValue
 Enum(processor_type) String(ARCEM) Value(PROCESSOR_ARCEM)
 
 EnumValue
-- 
2.6.4