[committed] amdgcn: Add gfx908 support

amdgcn: Add gfx908 support

gcc/

	* config/gcn/gcn-opts.h (enum processor_type): Add PROCESSOR_GFX908.
	* config/gcn/gcn.c (gcn_omp_device_kind_arch_isa): Add gfx908.
	(output_file_start): Add gfx908.
	* config/gcn/gcn.opt (gpu_type): Add gfx908.
	* config/gcn/t-gcn-hsa (MULTILIB_OPTIONS): Add march=gfx908.
	(MULTILIB_DIRNAMES): Add gfx908.
	* config/gcn/mkoffload.c (EF_AMDGPU_MACH_AMDGCN_GFX908): New define.
	(main): Recognize gfx908.
	* config/gcn/t-omp-device: Add gfx908.

libgomp/

	* plugin/plugin-gcn.c (EF_AMDGPU_MACH): Add
	EF_AMDGPU_MACH_AMDGCN_GFX908.
	(gcn_gfx908_s): New constant string.
	(isa_hsa_name): Add gfx908.
	(isa_code): Add gfx908.

diff --git a/gcc/config/gcn/gcn-opts.h b/gcc/config/gcn/gcn-opts.h
index ed9b45109ff..ed67d015ff8 100644
--- a/gcc/config/gcn/gcn-opts.h
+++ b/gcc/config/gcn/gcn-opts.h
@@ -22,7 +22,8 @@  enum processor_type
 {
   PROCESSOR_FIJI,    // gfx803
   PROCESSOR_VEGA10,  // gfx900
-  PROCESSOR_VEGA20   // gfx906
+  PROCESSOR_VEGA20,  // gfx906
+  PROCESSOR_GFX908   // as yet unnamed
 };
 
 /* Set in gcn_option_override.  */
diff --git a/gcc/config/gcn/gcn.c b/gcc/config/gcn/gcn.c
index 2351b24a4d5..e8bb0b63756 100644
--- a/gcc/config/gcn/gcn.c
+++ b/gcc/config/gcn/gcn.c
@@ -2589,6 +2589,8 @@  gcn_omp_device_kind_arch_isa (enum omp_device_kind_arch_isa trait,
 	return gcn_arch == PROCESSOR_VEGA10;
       if (strcmp (name, "gfx906") == 0)
 	return gcn_arch == PROCESSOR_VEGA20;
+      if (strcmp (name, "gfx908") == 0)
+	return gcn_arch == PROCESSOR_GFX908;
       return 0;
     default:
       gcc_unreachable ();
@@ -5030,6 +5032,7 @@  output_file_start (void)
     case PROCESSOR_FIJI: cpu = "gfx803"; break;
     case PROCESSOR_VEGA10: cpu = "gfx900"; break;
     case PROCESSOR_VEGA20: cpu = "gfx906"; break;
+    case PROCESSOR_GFX908: cpu = "gfx908+sram-ecc"; break;
     default: gcc_unreachable ();
     }
 
diff --git a/gcc/config/gcn/gcn.opt b/gcc/config/gcn/gcn.opt
index 7fd84f83572..767d45826c2 100644
--- a/gcc/config/gcn/gcn.opt
+++ b/gcc/config/gcn/gcn.opt
@@ -34,6 +34,9 @@  Enum(gpu_type) String(gfx900) Value(PROCESSOR_VEGA10)
 EnumValue
 Enum(gpu_type) String(gfx906) Value(PROCESSOR_VEGA20)
 
+EnumValue
+Enum(gpu_type) String(gfx908) Value(PROCESSOR_GFX908)
+
 march=
 Target RejectNegative Joined ToLower Enum(gpu_type) Var(gcn_arch) Init(PROCESSOR_FIJI)
 Specify the name of the target GPU.
diff --git a/gcc/config/gcn/mkoffload.c b/gcc/config/gcn/mkoffload.c
index eb1c717e6e9..dc9d5180a35 100644
--- a/gcc/config/gcn/mkoffload.c
+++ b/gcc/config/gcn/mkoffload.c
@@ -51,6 +51,8 @@ 
 #define EF_AMDGPU_MACH_AMDGCN_GFX900 0x2c
 #undef  EF_AMDGPU_MACH_AMDGCN_GFX906
 #define EF_AMDGPU_MACH_AMDGCN_GFX906 0x2f
+#undef  EF_AMDGPU_MACH_AMDGCN_GFX908
+#define EF_AMDGPU_MACH_AMDGCN_GFX908 0x230  // Assume SRAM-ECC enabled.
 
 #ifndef R_AMDGPU_NONE
 #define R_AMDGPU_NONE		0
@@ -856,6 +858,8 @@  main (int argc, char **argv)
 	elf_arch = EF_AMDGPU_MACH_AMDGCN_GFX900;
       else if (strcmp (argv[i], "-march=gfx906") == 0)
 	elf_arch = EF_AMDGPU_MACH_AMDGCN_GFX906;
+      else if (strcmp (argv[i], "-march=gfx908") == 0)
+	elf_arch = EF_AMDGPU_MACH_AMDGCN_GFX908;
     }
 
   if (!(fopenacc ^ fopenmp))
diff --git a/gcc/config/gcn/t-gcn-hsa b/gcc/config/gcn/t-gcn-hsa
index bf47da79227..ee4d9b30ff2 100644
--- a/gcc/config/gcn/t-gcn-hsa
+++ b/gcc/config/gcn/t-gcn-hsa
@@ -42,8 +42,8 @@  ALL_HOST_OBJS += gcn-run.o
 gcn-run$(exeext): gcn-run.o
 	+$(LINKER) $(ALL_LINKERFLAGS) $(LDFLAGS) -o $@ $< -ldl
 
-MULTILIB_OPTIONS = march=gfx900/march=gfx906
-MULTILIB_DIRNAMES = gfx900 gfx906
+MULTILIB_OPTIONS = march=gfx900/march=gfx906/march=gfx908
+MULTILIB_DIRNAMES = gfx900 gfx906 gfx908
 
 gcn-tree.o: $(srcdir)/config/gcn/gcn-tree.c
 	$(COMPILE) $<
diff --git a/gcc/config/gcn/t-omp-device b/gcc/config/gcn/t-omp-device
index d9809d5f455..8461c432ca9 100644
--- a/gcc/config/gcn/t-omp-device
+++ b/gcc/config/gcn/t-omp-device
@@ -1,4 +1,4 @@ 
 omp-device-properties-gcn: $(srcdir)/config/gcn/gcn.c
 	echo kind: gpu > $@
 	echo arch: gcn >> $@
-	echo isa: fiji gfx900 gfx906 >> $@
+	echo isa: fiji gfx900 gfx906 gfx908 >> $@
diff --git a/libgomp/plugin/plugin-gcn.c b/libgomp/plugin/plugin-gcn.c
index 47f0b6e25f8..8e6af69988e 100644
--- a/libgomp/plugin/plugin-gcn.c
+++ b/libgomp/plugin/plugin-gcn.c
@@ -403,6 +403,7 @@  typedef enum {
   EF_AMDGPU_MACH_AMDGCN_GFX803 = 0x02a,
   EF_AMDGPU_MACH_AMDGCN_GFX900 = 0x02c,
   EF_AMDGPU_MACH_AMDGCN_GFX906 = 0x02f,
+  EF_AMDGPU_MACH_AMDGCN_GFX908 = 0x030
 } EF_AMDGPU_MACH;
 
 const static int EF_AMDGPU_MACH_MASK = 0x000000ff;
@@ -1596,6 +1597,7 @@  elf_gcn_isa_field (Elf64_Ehdr *image)
 const static char *gcn_gfx803_s = "gfx803";
 const static char *gcn_gfx900_s = "gfx900";
 const static char *gcn_gfx906_s = "gfx906";
+const static char *gcn_gfx908_s = "gfx908";
 const static int gcn_isa_name_len = 6;
 
 /* Returns the name that the HSA runtime uses for the ISA or NULL if we do not
@@ -1611,6 +1613,8 @@  isa_hsa_name (int isa) {
       return gcn_gfx900_s;
     case EF_AMDGPU_MACH_AMDGCN_GFX906:
       return gcn_gfx906_s;
+    case EF_AMDGPU_MACH_AMDGCN_GFX908:
+      return gcn_gfx908_s;
     }
   return NULL;
 }
@@ -1644,6 +1648,9 @@  isa_code(const char *isa) {
   if (!strncmp (isa, gcn_gfx906_s, gcn_isa_name_len))
     return EF_AMDGPU_MACH_AMDGCN_GFX906;
 
+  if (!strncmp (isa, gcn_gfx908_s, gcn_isa_name_len))
+    return EF_AMDGPU_MACH_AMDGCN_GFX908;
+
   return -1;
 }