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Re: [PATCH, i386]: Implement atomic_fetch_sub


On 08/30/2012 05:33 PM, Richard Henderson wrote:
On 08/23/2012 08:59 AM, Andrew MacLeod wrote:
2012-08-23 Andrew MacLeod <amacleod@redhat.com>

gcc
	PR target/54087
	* optabs.c (expand_atomic_fetch_op_no_fallback): New.  Factored code
	from expand_atomic_fetch_op.
	(expand_atomic_fetch_op):  iTry atomic_{add|sub} operations in terms of
	the other one if direct opcode fails.

testsuite
	* gcc.dg/pr54087.c:  New testcase for atomic_sub -> atomic_add when
	atomic_sub fails.
Ok.


Oops, approved but never checked in. Just did so after a new bootstrap/test cycle with no issues.

Andrew


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