65 lines
1.9 KiB
C
65 lines
1.9 KiB
C
/*===-- sync-ops.h - --===//
|
|
*
|
|
* The LLVM Compiler Infrastructure
|
|
*
|
|
* This file is dual licensed under the MIT and the University of Illinois Open
|
|
* Source Licenses. See LICENSE.TXT for details.
|
|
*
|
|
*===----------------------------------------------------------------------===//
|
|
*
|
|
* This file implements outline macros for the __sync_fetch_and_*
|
|
* operations. Different instantiations will generate appropriate assembly for
|
|
* ARM and Thumb-2 versions of the functions.
|
|
*
|
|
*===----------------------------------------------------------------------===*/
|
|
|
|
#include "../assembly.h"
|
|
|
|
#define SYNC_OP_4(op) \
|
|
.p2align 2 ; \
|
|
.thumb ; \
|
|
.syntax unified ; \
|
|
DEFINE_COMPILERRT_THUMB_FUNCTION(__sync_fetch_and_ ## op) \
|
|
dmb ; \
|
|
mov r12, r0 ; \
|
|
LOCAL_LABEL(tryatomic_ ## op): \
|
|
ldrex r0, [r12] ; \
|
|
op(r2, r0, r1) ; \
|
|
strex r3, r2, [r12] ; \
|
|
cmp r3, #0 ; \
|
|
bne LOCAL_LABEL(tryatomic_ ## op) ; \
|
|
dmb ; \
|
|
bx lr
|
|
|
|
#define SYNC_OP_8(op) \
|
|
.p2align 2 ; \
|
|
.thumb ; \
|
|
.syntax unified ; \
|
|
DEFINE_COMPILERRT_THUMB_FUNCTION(__sync_fetch_and_ ## op) \
|
|
push {r4, r5, r6, lr} ; \
|
|
dmb ; \
|
|
mov r12, r0 ; \
|
|
LOCAL_LABEL(tryatomic_ ## op): \
|
|
ldrexd r0, r1, [r12] ; \
|
|
op(r4, r5, r0, r1, r2, r3) ; \
|
|
strexd r6, r4, r5, [r12] ; \
|
|
cmp r6, #0 ; \
|
|
bne LOCAL_LABEL(tryatomic_ ## op) ; \
|
|
dmb ; \
|
|
pop {r4, r5, r6, pc}
|
|
|
|
#define MINMAX_4(rD, rN, rM, cmp_kind) \
|
|
cmp rN, rM ; \
|
|
mov rD, rM ; \
|
|
it cmp_kind ; \
|
|
mov##cmp_kind rD, rN
|
|
|
|
#define MINMAX_8(rD_LO, rD_HI, rN_LO, rN_HI, rM_LO, rM_HI, cmp_kind) \
|
|
cmp rN_LO, rM_LO ; \
|
|
sbcs rN_HI, rM_HI ; \
|
|
mov rD_LO, rM_LO ; \
|
|
mov rD_HI, rM_HI ; \
|
|
itt cmp_kind ; \
|
|
mov##cmp_kind rD_LO, rN_LO ; \
|
|
mov##cmp_kind rD_HI, rN_HI
|