1 /*
2 * Test the LCBB instruction.
3 *
4 * SPDX-License-Identifier: GPL-2.0-or-later
5 */
6 #include <assert.h>
7 #include <stdlib.h>
8
9 static inline __attribute__((__always_inline__)) void
lcbb(long * r1,void * dxb2,int m3,int * cc)10 lcbb(long *r1, void *dxb2, int m3, int *cc)
11 {
12 asm("lcbb %[r1],%[dxb2],%[m3]\n"
13 "ipm %[cc]"
14 : [r1] "+r" (*r1), [cc] "=r" (*cc)
15 : [dxb2] "R" (*(char *)dxb2), [m3] "i" (m3)
16 : "cc");
17 *cc = (*cc >> 28) & 3;
18 }
19
20 static char buf[0x1000] __attribute__((aligned(0x1000)));
21
22 static inline __attribute__((__always_inline__)) void
test_lcbb(void * p,int m3,int exp_r1,int exp_cc)23 test_lcbb(void *p, int m3, int exp_r1, int exp_cc)
24 {
25 long r1 = 0xfedcba9876543210;
26 int cc;
27
28 lcbb(&r1, p, m3, &cc);
29 assert(r1 == (0xfedcba9800000000 | exp_r1));
30 assert(cc == exp_cc);
31 }
32
main(void)33 int main(void)
34 {
35 test_lcbb(&buf[0], 0, 16, 0);
36 test_lcbb(&buf[63], 0, 1, 3);
37 test_lcbb(&buf[0], 1, 16, 0);
38 test_lcbb(&buf[127], 1, 1, 3);
39 test_lcbb(&buf[0], 2, 16, 0);
40 test_lcbb(&buf[255], 2, 1, 3);
41 test_lcbb(&buf[0], 3, 16, 0);
42 test_lcbb(&buf[511], 3, 1, 3);
43 test_lcbb(&buf[0], 4, 16, 0);
44 test_lcbb(&buf[1023], 4, 1, 3);
45 test_lcbb(&buf[0], 5, 16, 0);
46 test_lcbb(&buf[2047], 5, 1, 3);
47 test_lcbb(&buf[0], 6, 16, 0);
48 test_lcbb(&buf[4095], 6, 1, 3);
49
50 return EXIT_SUCCESS;
51 }
52