1 files changed, 0 insertions, 76 deletions

diff --git a/meta-xilinx-bsp/recipes-microblaze/gcc/gcc-7/0003-microblaze-sync.md-Correct-behaviour-and-define-side.patch b/meta-xilinx-bsp/recipes-microblaze/gcc/gcc-7/0003-microblaze-sync.md-Correct-behaviour-and-define-side.patch
deleted file mode 100644
index 9336291b..00000000
--- a/meta-xilinx-bsp/recipes-microblaze/gcc/gcc-7/0003-microblaze-sync.md-Correct-behaviour-and-define-side.patch
+++ /dev/null
@@ -1,76 +0,0 @@
-From 6c7a10a9e077d0221cc9a6c5f5a6365815c1dca4 Mon Sep 17 00:00:00 2001
-From: Nathan Rossi <nathan@nathanrossi.com>
-Date: Mon, 12 Jun 2017 00:28:42 +1000
-Subject: [PATCH 3/4] microblaze/sync.md: Correct behaviour and define
- side-effects
-
-This change corrects the behaviour with regards to the bool output.
-Previously the definition would set the bool operand to true (non-zero)
-on failure, specifically at the 'cmp' against the expected operand which
-would be set non-zero when the memory != expected value. Instead of
-using the bool operand as the compare result use the clobbered %8
-operand for temporary comparison result and set the bool operand at the
-end of the definition to true (in this case the immediate value of 1).
-Also to ensure that the bool operand is 0 in all other cases the first
-instruction which is intended as a clear of the carry bit is reused to
-set the bool operand to 0 at the same time as clearing the carry bit.
-And finally the jump offsets were updated
-
-Additional to the behaviour change this change defines the side-effects
-of the atomic_compare_and_swap. Specifically the side effects where the
-bool and val operands are modified/set based on the value of the memory
-content. This prevents certain optimization behaviour from incorrectly
-optimizing away code. An example of this is the snippet below, where in
-certain cases the comparison is optimized away entirely.
-
-  mem = 2;
-  if (atomic_compare_and_swap(&mem, ...) == 2)
-    ...
-
-Signed-off-by: Nathan Rossi <nathan@nathanrossi.com>
-Upstream-Status: Unsubmitted
----
- gcc/config/microblaze/sync.md | 14 ++++++++------
- 1 file changed, 8 insertions(+), 6 deletions(-)
-
-diff --git a/gcc/config/microblaze/sync.md b/gcc/config/microblaze/sync.md
-index 8125bd8d63..605a9a969e 100644
---- a/gcc/config/microblaze/sync.md
-+++ b/gcc/config/microblaze/sync.md
-@@ -18,9 +18,10 @@
- ;; <http://www.gnu.org/licenses/>.
- 
- (define_insn "atomic_compare_and_swapsi"
--  [(match_operand:SI 0 "register_operand" "=&d")       ;; bool output
--   (match_operand:SI 1 "register_operand" "=&d")       ;; val output
--   (match_operand:SI 2 "nonimmediate_operand" "+Q")    ;; memory
-+  [(set (match_operand:SI 0 "register_operand" "=&d")  ;; bool output
-+     (match_operand:SI 2 "nonimmediate_operand" "+Q")) ;; memory
-+   (set (match_operand:SI 1 "register_operand" "=&d")  ;; val output
-+     (match_dup 2))
-    (match_operand:SI 3 "register_operand" "d")         ;; expected value
-    (match_operand:SI 4 "register_operand" "d")         ;; desired value
-    (match_operand:SI 5 "const_int_operand" "")         ;; is_weak
-@@ -29,15 +30,16 @@
-    (clobber (match_scratch:SI 8 "=&d"))]
-   ""
-   {
--    output_asm_insn ("addc \tr0,r0,r0", operands);
-+    output_asm_insn ("add  \t%0,r0,r0", operands);
-     output_asm_insn ("lwx  \t%1,%y2,r0", operands);
-     output_asm_insn ("addic\t%8,r0,0", operands);
-     output_asm_insn ("bnei \t%8,.-8", operands);
--    output_asm_insn ("cmp  \t%0,%1,%3", operands);
--    output_asm_insn ("bnei \t%0,.+16", operands);
-+    output_asm_insn ("cmp  \t%8,%1,%3", operands);
-+    output_asm_insn ("bnei \t%8,.+20", operands);
-     output_asm_insn ("swx  \t%4,%y2,r0", operands);
-     output_asm_insn ("addic\t%8,r0,0", operands);
-     output_asm_insn ("bnei \t%8,.-28", operands);
-+    output_asm_insn ("addi \t%0,r0,1", operands);
-     return "";
-   }
- )
--- 
-2.11.0
-