Re: [gomp4] merge ptx changes

[Thomas Schwinge <thomas@codesourcery.com>]

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Hi!

On Tue, 5 Jan 2016 09:22:46 -0500, Nathan Sidwell <nathan@acm.org> wrote:
> This patch merges my most recent sequence of ptx  backend changes to the gomp4 
> branch.

I suppose it's not been intentional that during that, you dropped some of
the changes present on gomp-4_0-branch, once installed for "[gomp4] Basic
-misa support for nvptx",
<http://news.gmane.org/find-root.php?message_id=%3C87lhgsjhf9.fsf%40schwinge.name%3E>?
In gomp-4_0-branch r232224, I restored that code (untested) as follows:

commit 7cc2a8ac6cd0e07725a1654317e70ef43cceda8a
Author: tschwinge <tschwinge@138bc75d-0d04-0410-961f-82ee72b054a4>
Date:   Mon Jan 11 12:17:15 2016 +0000

    Restore basic -misa support for nvptx
    
    	gcc/
    	* config/nvptx/nvptx.h (ASM_SPEC): Define.
    	* config/nvptx/nvptx.md (atomic_fetch_<logic><mode>): Enable
    	conditionally.
    
    git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gomp-4_0-branch@232224 138bc75d-0d04-0410-961f-82ee72b054a4
---
 gcc/ChangeLog.gomp        | 6 ++++++
 gcc/config/nvptx/nvptx.h  | 2 ++
 gcc/config/nvptx/nvptx.md | 3 +--
 3 files changed, 9 insertions(+), 2 deletions(-)

diff --git gcc/ChangeLog.gomp gcc/ChangeLog.gomp
index 1f386bb..f55f87c 100644
--- gcc/ChangeLog.gomp
+++ gcc/ChangeLog.gomp
@@ -1,3 +1,9 @@
+2016-01-11  Thomas Schwinge  <thomas@codesourcery.com>
+
+	* config/nvptx/nvptx.h (ASM_SPEC): Define.
+	* config/nvptx/nvptx.md (atomic_fetch_<logic><mode>): Enable
+	conditionally.
+
 2016-01-08  Cesar Philippidis  <cesar@codesourcery.com>
 
 	* lto-cgraph.c (input_varpool_node): Reduce the assert for
diff --git gcc/config/nvptx/nvptx.h gcc/config/nvptx/nvptx.h
index a954252..9863f16 100644
--- gcc/config/nvptx/nvptx.h
+++ gcc/config/nvptx/nvptx.h
@@ -29,6 +29,8 @@
 
 #define STARTFILE_SPEC "%{mmainkernel:crt0.o}"
 
+#define ASM_SPEC "%{misa=*:-m %*}"
+
 #define TARGET_CPU_CPP_BUILTINS()		\
   do						\
     {						\
diff --git gcc/config/nvptx/nvptx.md gcc/config/nvptx/nvptx.md
index 33a4862..3c882cb 100644
--- gcc/config/nvptx/nvptx.md
+++ gcc/config/nvptx/nvptx.md
@@ -1215,7 +1215,6 @@
 (define_code_iterator any_logic [and ior xor])
 (define_code_attr logic [(and "and") (ior "or") (xor "xor")])
 
-;; Currently disabled until we add better subtarget support - requires sm_32.
 (define_insn "atomic_fetch_<logic><mode>"
   [(set (match_operand:SDIM 1 "memory_operand" "+m")
 	(unspec_volatile:SDIM
@@ -1225,7 +1224,7 @@
 	  UNSPECV_LOCK))
    (set (match_operand:SDIM 0 "nvptx_register_operand" "=R")
 	(match_dup 1))]
-  "0"
+  "<MODE>mode == SImode || TARGET_SM35"
   "%.\\tatom%A1.b%T0.<logic>\\t%0, %1, %2;")
 
 (define_insn "nvptx_barsync"


Grüße
 Thomas

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