1 /*===-- sync-ops.h - --===//
3 * The LLVM Compiler Infrastructure
5 * This file is dual licensed under the MIT and the University of Illinois Open
6 * Source Licenses. See LICENSE.TXT for details.
8 *===----------------------------------------------------------------------===//
10 * This file implements outline macros for the __sync_fetch_and_*
11 * operations. Different instantiations will generate appropriate assembly for
12 * ARM and Thumb-2 versions of the functions.
14 *===----------------------------------------------------------------------===*/
16 #include "../assembly.h"
18 #define SYNC_OP_4(op) \
22 DEFINE_COMPILERRT_THUMB_FUNCTION(__sync_fetch_and_ ## op) \
25 LOCAL_LABEL(tryatomic_ ## op): \
28 strex r3, r2, [r12] ; \
30 bne LOCAL_LABEL(tryatomic_ ## op) ; \
34 #define SYNC_OP_8(op) \
38 DEFINE_COMPILERRT_THUMB_FUNCTION(__sync_fetch_and_ ## op) \
39 push {r4, r5, r6, lr} ; \
42 LOCAL_LABEL(tryatomic_ ## op): \
43 ldrexd r0, r1, [r12] ; \
44 op(r4, r5, r0, r1, r2, r3) ; \
45 strexd r6, r4, r5, [r12] ; \
47 bne LOCAL_LABEL(tryatomic_ ## op) ; \
51 #define MINMAX_4(rD, rN, rM, cmp_kind) \
57 #define MINMAX_8(rD_LO, rD_HI, rN_LO, rN_HI, rM_LO, rM_HI, cmp_kind) \
63 mov##cmp_kind rD_LO, rN_LO ; \
64 mov##cmp_kind rD_HI, rN_HI