nvptx: Support '-mptx=7.8'

	gcc/
	* config/nvptx/nvptx-opts.h (enum ptx_version): Add
	'PTX_VERSION_7_8'.
	* config/nvptx/nvptx.cc (ptx_version_to_string)
	(ptx_version_to_number): Adjust.
	* config/nvptx/nvptx.h (TARGET_PTX_7_8): New.
	* config/nvptx/nvptx.opt (Enum(ptx_version)): Add 'EnumValue'
	'7.8' for 'PTX_VERSION_7_8'.
	* doc/invoke.texi (Nvidia PTX Options): Document '-mptx=7.8'.
	gcc/testsuite/
	* gcc.target/nvptx/mptx=7.8.c: New.

6 files changed, 30 insertions, 2 deletions

diff --git a/gcc/config/nvptx/nvptx-opts.h b/gcc/config/nvptx/nvptx-opts.h
index 1277f21..7b55086 100644
--- a/gcc/config/nvptx/nvptx-opts.h
+++ b/gcc/config/nvptx/nvptx-opts.h
@@ -42,7 +42,8 @@ enum ptx_version
   PTX_VERSION_4_2,
   PTX_VERSION_6_0,
   PTX_VERSION_6_3,
-  PTX_VERSION_7_0
+  PTX_VERSION_7_0,
+  PTX_VERSION_7_8
 };
 
 #endif
diff --git a/gcc/config/nvptx/nvptx.cc b/gcc/config/nvptx/nvptx.cc
index 93402bf..65d339b 100644
--- a/gcc/config/nvptx/nvptx.cc
+++ b/gcc/config/nvptx/nvptx.cc
@@ -265,6 +265,8 @@ ptx_version_to_string (enum ptx_version v)
       return "6.3";
     case PTX_VERSION_7_0:
       return "7.0";
+    case PTX_VERSION_7_8:
+      return "7.8";
     default:
       gcc_unreachable ();
     }
@@ -287,6 +289,8 @@ ptx_version_to_number (enum ptx_version v, bool major_p)
       return major_p ? 6 : 3;
     case PTX_VERSION_7_0:
       return major_p ? 7 : 0;
+    case PTX_VERSION_7_8:
+      return major_p ? 7 : 8;
     default:
       gcc_unreachable ();
     }
diff --git a/gcc/config/nvptx/nvptx.h b/gcc/config/nvptx/nvptx.h
index 7b7e172..5d914c4 100644
--- a/gcc/config/nvptx/nvptx.h
+++ b/gcc/config/nvptx/nvptx.h
@@ -95,6 +95,7 @@
 #define TARGET_PTX_6_0 (ptx_version_option >= PTX_VERSION_6_0)
 #define TARGET_PTX_6_3 (ptx_version_option >= PTX_VERSION_6_3)
 #define TARGET_PTX_7_0 (ptx_version_option >= PTX_VERSION_7_0)
+#define TARGET_PTX_7_8 (ptx_version_option >= PTX_VERSION_7_8)
 
 /* Registers.  Since ptx is a virtual target, we just define a few
    hard registers for special purposes and leave pseudos unallocated.
diff --git a/gcc/config/nvptx/nvptx.opt b/gcc/config/nvptx/nvptx.opt
index 4d14eda..842cbbbe 100644
--- a/gcc/config/nvptx/nvptx.opt
+++ b/gcc/config/nvptx/nvptx.opt
@@ -143,6 +143,9 @@ EnumValue
 Enum(ptx_version) String(7.0) Value(PTX_VERSION_7_0)
 
 EnumValue
+Enum(ptx_version) String(7.8) Value(PTX_VERSION_7_8)
+
+EnumValue
 Enum(ptx_version) String(_) Value(PTX_VERSION_default)
 
 mptx=
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 92728a7..8271e64 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -30075,7 +30075,7 @@ Valid version strings are
 @samp{3.1},
 @samp{4.1}, @samp{4.2},
 @samp{6.0}, @samp{6.3},
-and @samp{7.0}.
+@samp{7.0}, and @samp{7.8}.
 The default PTX ISA version is 6.0, unless a higher
 version is required for specified PTX ISA target architecture via
 option @option{-march=}.
diff --git a/gcc/testsuite/gcc.target/nvptx/mptx=7.8.c b/gcc/testsuite/gcc.target/nvptx/mptx=7.8.c
new file mode 100644
index 0000000..d80bdba
--- /dev/null
+++ b/gcc/testsuite/gcc.target/nvptx/mptx=7.8.c
@@ -0,0 +1,19 @@
+/* { dg-do assemble } */
+/* { dg-options {-march=sm_30 -mptx=7.8} } */
+/* { dg-additional-options -save-temps } */
+/* { dg-final { scan-assembler-times {(?n)^	\.version	7\.8$} 1 } } */
+/* { dg-final { scan-assembler-times {(?n)^	\.target	sm_30$} 1 } } */
+
+#if __PTX_ISA_VERSION_MAJOR__ != 7
+#error wrong value for __PTX_ISA_VERSION_MAJOR__
+#endif
+
+#if __PTX_ISA_VERSION_MINOR__ != 8
+#error wrong value for __PTX_ISA_VERSION_MINOR__
+#endif
+
+#if __PTX_SM__ != 300
+#error wrong value for __PTX_SM__
+#endif
+
+int dummy;