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.

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.  */

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 ();
     }
 

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.

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))

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) $<

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 >> $@

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;
 }