diff options
Diffstat (limited to 'contrib/llvm-project/compiler-rt/lib/builtins/arm/sync-ops.h')
| -rw-r--r-- | contrib/llvm-project/compiler-rt/lib/builtins/arm/sync-ops.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/contrib/llvm-project/compiler-rt/lib/builtins/arm/sync-ops.h b/contrib/llvm-project/compiler-rt/lib/builtins/arm/sync-ops.h new file mode 100644 index 000000000000..c9623249e5d2 --- /dev/null +++ b/contrib/llvm-project/compiler-rt/lib/builtins/arm/sync-ops.h @@ -0,0 +1,61 @@ +//===-- sync-ops.h - --===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// +// +// 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 |