1*7c3d14c8STreehugger Robot /*===-- sync-ops.h - --===// 2*7c3d14c8STreehugger Robot * 3*7c3d14c8STreehugger Robot * The LLVM Compiler Infrastructure 4*7c3d14c8STreehugger Robot * 5*7c3d14c8STreehugger Robot * This file is dual licensed under the MIT and the University of Illinois Open 6*7c3d14c8STreehugger Robot * Source Licenses. See LICENSE.TXT for details. 7*7c3d14c8STreehugger Robot * 8*7c3d14c8STreehugger Robot *===----------------------------------------------------------------------===// 9*7c3d14c8STreehugger Robot * 10*7c3d14c8STreehugger Robot * This file implements outline macros for the __sync_fetch_and_* 11*7c3d14c8STreehugger Robot * operations. Different instantiations will generate appropriate assembly for 12*7c3d14c8STreehugger Robot * ARM and Thumb-2 versions of the functions. 13*7c3d14c8STreehugger Robot * 14*7c3d14c8STreehugger Robot *===----------------------------------------------------------------------===*/ 15*7c3d14c8STreehugger Robot 16*7c3d14c8STreehugger Robot #include "../assembly.h" 17*7c3d14c8STreehugger Robot 18*7c3d14c8STreehugger Robot #define SYNC_OP_4(op) \ 19*7c3d14c8STreehugger Robot .p2align 2 ; \ 20*7c3d14c8STreehugger Robot .thumb ; \ 21*7c3d14c8STreehugger Robot .syntax unified ; \ 22*7c3d14c8STreehugger Robot DEFINE_COMPILERRT_THUMB_FUNCTION(__sync_fetch_and_ ## op) \ 23*7c3d14c8STreehugger Robot dmb ; \ 24*7c3d14c8STreehugger Robot mov r12, r0 ; \ 25*7c3d14c8STreehugger Robot LOCAL_LABEL(tryatomic_ ## op): \ 26*7c3d14c8STreehugger Robot ldrex r0, [r12] ; \ 27*7c3d14c8STreehugger Robot op(r2, r0, r1) ; \ 28*7c3d14c8STreehugger Robot strex r3, r2, [r12] ; \ 29*7c3d14c8STreehugger Robot cmp r3, #0 ; \ 30*7c3d14c8STreehugger Robot bne LOCAL_LABEL(tryatomic_ ## op) ; \ 31*7c3d14c8STreehugger Robot dmb ; \ 32*7c3d14c8STreehugger Robot bx lr 33*7c3d14c8STreehugger Robot 34*7c3d14c8STreehugger Robot #define SYNC_OP_8(op) \ 35*7c3d14c8STreehugger Robot .p2align 2 ; \ 36*7c3d14c8STreehugger Robot .thumb ; \ 37*7c3d14c8STreehugger Robot .syntax unified ; \ 38*7c3d14c8STreehugger Robot DEFINE_COMPILERRT_THUMB_FUNCTION(__sync_fetch_and_ ## op) \ 39*7c3d14c8STreehugger Robot push {r4, r5, r6, lr} ; \ 40*7c3d14c8STreehugger Robot dmb ; \ 41*7c3d14c8STreehugger Robot mov r12, r0 ; \ 42*7c3d14c8STreehugger Robot LOCAL_LABEL(tryatomic_ ## op): \ 43*7c3d14c8STreehugger Robot ldrexd r0, r1, [r12] ; \ 44*7c3d14c8STreehugger Robot op(r4, r5, r0, r1, r2, r3) ; \ 45*7c3d14c8STreehugger Robot strexd r6, r4, r5, [r12] ; \ 46*7c3d14c8STreehugger Robot cmp r6, #0 ; \ 47*7c3d14c8STreehugger Robot bne LOCAL_LABEL(tryatomic_ ## op) ; \ 48*7c3d14c8STreehugger Robot dmb ; \ 49*7c3d14c8STreehugger Robot pop {r4, r5, r6, pc} 50*7c3d14c8STreehugger Robot 51*7c3d14c8STreehugger Robot #define MINMAX_4(rD, rN, rM, cmp_kind) \ 52*7c3d14c8STreehugger Robot cmp rN, rM ; \ 53*7c3d14c8STreehugger Robot mov rD, rM ; \ 54*7c3d14c8STreehugger Robot it cmp_kind ; \ 55*7c3d14c8STreehugger Robot mov##cmp_kind rD, rN 56*7c3d14c8STreehugger Robot 57*7c3d14c8STreehugger Robot #define MINMAX_8(rD_LO, rD_HI, rN_LO, rN_HI, rM_LO, rM_HI, cmp_kind) \ 58*7c3d14c8STreehugger Robot cmp rN_LO, rM_LO ; \ 59*7c3d14c8STreehugger Robot sbcs rN_HI, rM_HI ; \ 60*7c3d14c8STreehugger Robot mov rD_LO, rM_LO ; \ 61*7c3d14c8STreehugger Robot mov rD_HI, rM_HI ; \ 62*7c3d14c8STreehugger Robot itt cmp_kind ; \ 63*7c3d14c8STreehugger Robot mov##cmp_kind rD_LO, rN_LO ; \ 64*7c3d14c8STreehugger Robot mov##cmp_kind rD_HI, rN_HI 65