File: xadd.s

package info (click to toggle)
gdb-doc 13.1-1
  • links: PTS, VCS
  • area: non-free
  • in suites: bookworm
  • size: 234,284 kB
  • sloc: ansic: 1,988,072; asm: 373,465; exp: 187,579; cpp: 75,697; makefile: 69,432; sh: 24,829; yacc: 11,654; python: 9,602; ada: 6,680; xml: 6,073; perl: 5,077; pascal: 3,357; f90: 2,555; tcl: 1,902; lisp: 1,578; cs: 879; lex: 759; sed: 228; awk: 154; objc: 137; fortran: 57
file content (44 lines) | stat: -rw-r--r-- 1,066 bytes parent folder | download | duplicates (6) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
 
# mach: bpf
# output: pass\nexit 0 (0x0)\n
;;; xadd.s
;;; Tests for BPF atomic exchange-and-add instructions in simulator
;;;
;;; The xadd instructions (XADDW, XADDDW) operate on a memory location
;;; specified in $dst + offset16, atomically adding the value in $src.
;;;
;;; In the simulator, there isn't anything else happening. The atomic
;;; instructions are identical to a non-atomic load/add/store.

    .include "testutils.inc"

    .text
    .global main
    .type main, @function
main:
    mov         %r1, 0x1000
    mov         %r2, 5

    ;; basic xadd w
    stw         [%r1+0], 10
    xaddw       [%r1+0], %r2
    ldxw        %r3, [%r1+0]
    fail_ne     %r3, 15

    ;; basic xadd dw
    stdw        [%r1+8], 42
    xadddw      [%r1+8], %r2
    ldxdw       %r3, [%r1+8]
    fail_ne     %r3, 47

    ;; xadd w negative value
    mov         %r4, -1
    xaddw       [%r1+0], %r4
    ldxw        %r3, [%r1+0]
    fail_ne     %r3, 14

    ;; xadd dw negative val
    xadddw      [%r1+8], %r4
    ldxdw       %r3, [%r1+8]
    fail_ne     %r3, 46

    pass