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Groups > linux.kernel > #1385559
| From | Peter Zijlstra <peterz@infradead.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [RFC][PATCH 10/31] locking,hexagon: Implement atomic_fetch_{add,sub,and,or,xor}() |
| Date | 2016-04-23 04:20 +0200 |
| Message-ID | <rqVkS-3KW-3@gated-at.bofh.it> (permalink) |
| References | <rqFSN-8hs-3@gated-at.bofh.it> <rqGcc-hy-41@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Fri, Apr 22, 2016 at 11:04:23AM +0200, Peter Zijlstra wrote:
> +#define ATOMIC_FETCH_OP(op) \
> +static inline int atomic_fetch_##op(int i, atomic_t *v) \
> +{ \
> + int output, val; \
> + \
> + __asm__ __volatile__ ( \
> + "1: %0 = memw_locked(%2);\n" \
> + " %1 = "#op "(%0,%3);\n" \
> + " memw_locked(%2,P3)=%0;\n" \
I'm thinking that wants to be:
memw_locked(%2,P3)=%1;
> + " if !P3 jump 1b;\n" \
> + : "=&r" (output), "=&r" (val) \
> + : "r" (&v->counter), "r" (i) \
> + : "memory", "p3" \
> + ); \
> + return output; \
> +}
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[RFC][PATCH 00/31] implement atomic_fetch_$op Peter Zijlstra <peterz@infradead.org> - 2016-04-22 12:10 +0200
[RFC][PATCH 10/31] locking,hexagon: Implement atomic_fetch_{add,sub,and,or,xor}() Peter Zijlstra <peterz@infradead.org> - 2016-04-22 12:10 +0200
Re: [RFC][PATCH 10/31] locking,hexagon: Implement atomic_fetch_{add,sub,and,or,xor}() Peter Zijlstra <peterz@infradead.org> - 2016-04-23 04:20 +0200
Re: [RFC][PATCH 10/31] locking,hexagon: Implement atomic_fetch_{add,sub,and,or,xor}() Richard Kuo <rkuo@codeaurora.org> - 2016-04-26 02:40 +0200
[RFC][PATCH 22/31] locking,tile: Implement atomic{,64}_fetch_{add,sub,and,or,xor}() Peter Zijlstra <peterz@infradead.org> - 2016-04-22 12:10 +0200
Re: [RFC][PATCH 22/31] locking,tile: Implement atomic{,64}_fetch_{add,sub,and,or,xor}() Peter Zijlstra <peterz@infradead.org> - 2016-04-26 17:30 +0200
[RFC][PATCH 31/31] locking,qrwlock: Employ atomic_fetch_add_acquire() Peter Zijlstra <peterz@infradead.org> - 2016-04-22 12:10 +0200
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