| 1 | /* |
| 2 | * Test the TEST AND SET instruction. |
| 3 | * |
| 4 | * SPDX-License-Identifier: GPL-2.0-or-later |
| 5 | */ |
| 6 | #include <assert.h> |
| 7 | #include <stdlib.h> |
| 8 | |
| 9 | static int ts(char *p) |
| 10 | { |
| 11 | int cc; |
| 12 | |
| 13 | asm("ts %[p]\n" |
| 14 | "ipm %[cc]" |
| 15 | : [cc] "=r" (cc) |
| 16 | , [p] "+Q" (*p) |
| 17 | : : "cc"); |
| 18 | |
| 19 | return (cc >> 28) & 3; |
| 20 | } |
| 21 | |
| 22 | int main(void) |
| 23 | { |
| 24 | char c; |
| 25 | |
| 26 | c = 0x80; |
| 27 | assert(ts(&c) == 1); |
| 28 | assert(c == 0xff); |
| 29 | |
| 30 | c = 0x7f; |
| 31 | assert(ts(&c) == 0); |
| 32 | assert(c == 0xff); |
| 33 | |
| 34 | return EXIT_SUCCESS; |
| 35 | } |