diff options
Diffstat (limited to 'libcutils/atomic-android-armv6.S')
-rw-r--r-- | libcutils/atomic-android-armv6.S | 169 |
1 files changed, 0 insertions, 169 deletions
diff --git a/libcutils/atomic-android-armv6.S b/libcutils/atomic-android-armv6.S deleted file mode 100644 index 64146c1..0000000 --- a/libcutils/atomic-android-armv6.S +++ /dev/null @@ -1,169 +0,0 @@ -/* - * Copyright (C) 2008 The Android Open Source Project - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - - - .text - .align - - .global android_atomic_write - - .global android_atomic_inc - .global android_atomic_dec - - .global android_atomic_add - .global android_atomic_and - .global android_atomic_or - - .global android_atomic_swap - - .global android_atomic_cmpxchg - - - -/* FIXME: On SMP systems memory barriers may be needed */ -#warning "this file is not safe with SMP systems" - - -/* - * ---------------------------------------------------------------------------- - * android_atomic_write - * input: r0=value, r1=address - * output: void - */ - -android_atomic_write: -1: ldrex r12, [r1] - strex r12, r0, [r1] - cmp r12, #0 - bne 1b - bx lr - -/* - * ---------------------------------------------------------------------------- - * android_atomic_inc - * input: r0 = address - * output: r0 = old value - */ - -android_atomic_inc: - mov r12, r0 -1: ldrex r0, [r12] - add r2, r0, #1 - strex r1, r2, [r12] - cmp r1, #0 - bxeq lr - b 1b - -/* - * ---------------------------------------------------------------------------- - * android_atomic_dec - * input: r0=address - * output: r0 = old value - */ - -android_atomic_dec: - mov r12, r0 -1: ldrex r0, [r12] - sub r2, r0, #1 - strex r1, r2, [r12] - cmp r1, #0 - bxeq lr - b 1b - - -/* - * ---------------------------------------------------------------------------- - * android_atomic_add - * input: r0=value, r1=address - * output: r0 = old value - */ - -android_atomic_add: - mov r12, r0 -1: ldrex r0, [r1] - add r2, r0, r12 - strex r3, r2, [r1] - cmp r3, #0 - bxeq lr - b 1b - -/* - * ---------------------------------------------------------------------------- - * android_atomic_and - * input: r0=value, r1=address - * output: r0 = old value - */ - -android_atomic_and: - mov r12, r0 -1: ldrex r0, [r1] - and r2, r0, r12 - strex r3, r2, [r1] - cmp r3, #0 - bxeq lr - b 1b - - -/* - * ---------------------------------------------------------------------------- - * android_atomic_or - * input: r0=value, r1=address - * output: r0 = old value - */ - -android_atomic_or: - mov r12, r0 -1: ldrex r0, [r1] - orr r2, r0, r12 - strex r3, r2, [r1] - cmp r3, #0 - bxeq lr - b 1b - -/* - * ---------------------------------------------------------------------------- - * android_atomic_swap - * input: r0=value, r1=address - * output: r0 = old value - */ - -android_atomic_swap: - swp r0, r0, [r1] - bx lr - -/* - * ---------------------------------------------------------------------------- - * android_atomic_cmpxchg - * input: r0=oldvalue, r1=newvalue, r2=address - * output: r0 = 0 (xchg done) or non-zero (xchg not done) - */ - -android_atomic_cmpxchg: - mov r12, r1 - ldrex r3, [r2] - eors r0, r0, r3 - strexeq r0, r12, [r2] - bx lr - - - -/* - * ---------------------------------------------------------------------------- - * android_atomic_cmpxchg_64 - * input: r0-r1=oldvalue, r2-r3=newvalue, arg4 (on stack)=address - * output: r0 = 0 (xchg done) or non-zero (xchg not done) - */ -/* TODO: NEED IMPLEMENTATION FOR THIS ARCHITECTURE */ |