4 /* The FLOGR insn reads from register R2 and writes to register R1 and
5 R1 + 1. So we need to distinguish three cases:
7 (1) All three registers R1, R1 + 1, and R2 are distinct
11 These are tested by flogr1, flogr2, and flogr3, respectively. */
13 /* Call FLOGR on INPUT. The results are returned through the parms. */
15 /* R2 != R1 && R2 != R1 + 1 */
17 flogr1(unsigned long input, unsigned long *bitpos, unsigned long *modval,
21 register unsigned long value asm("4") = input;
23 asm volatile ( FLOGR(2,4)
25 "stg 2, %[bitpos]\n\t"
26 "stg 3, %[modval]\n\t"
27 : [bitpos]"=m"(*bitpos), [modval]"=m"(*modval),
34 printf("value = %lx, bitpos = %lu, modval = %lx, cc = %d\n",
35 value, *bitpos, *modval, *cc);
41 flogr2(unsigned long input, unsigned long *bitpos, unsigned long *modval,
45 register unsigned long value asm("2") = input;
47 asm volatile ( FLOGR(2,2)
49 "stg 2, %[bitpos]\n\t"
50 "stg 3, %[modval]\n\t"
51 : [bitpos]"=m"(*bitpos), [modval]"=m"(*modval),
52 [psw]"=d"(psw), [val] "+d"(value)
58 printf("value = %lx, bitpos = %lu, modval = %lx, cc = %d\n",
59 value, *bitpos, *modval, *cc);
65 flogr3(unsigned long input, unsigned long *bitpos, unsigned long *modval,
69 register unsigned long value asm("3") = input;
71 asm volatile ( FLOGR(2,3)
73 "stg 2, %[bitpos]\n\t"
74 "stg 3, %[modval]\n\t"
75 : [bitpos]"=m"(*bitpos), [modval]"=m"(*modval),
76 [psw]"=d"(psw), [val] "+d"(value)
82 printf("value = %lx, bitpos = %lu, modval = %lx, cc = %d\n",
83 value, *bitpos, *modval, *cc);
88 runtest(void (*func)(unsigned long, unsigned long *, unsigned long *,
91 unsigned long bitpos, modval, value;
95 /* Value 0 is special */
97 func(value, &bitpos, &modval, &cc);
98 if (modval != 0) fprintf(stderr, "modval is wrong for %lx\n", value);
99 if (bitpos != 64) fprintf(stderr, "bitpos is wrong for %lx\n", value);
100 if (cc != 0) fprintf(stderr, "cc is wrong for %lx\n", value);
102 /* Test with exactly 1 bit set */
103 for (i = 0; i < 64; ++i) {
105 func(value, &bitpos, &modval, &cc);
106 if (modval != 0) fprintf(stderr, "modval is wrong for %lx\n", value);
107 if (bitpos != 63 - i) fprintf(stderr, "bitpos is wrong for %lx\n", value);
108 if (cc != 2) fprintf(stderr, "cc is wrong for %lx\n", value);
111 /* Test with all bits 1 right from first 1 bit */
112 for (i = 1; i < 64; ++i) {
114 value = value | (value - 1);
115 func(value, &bitpos, &modval, &cc);
116 if (modval != (value >> 1)) fprintf(stderr, "modval is wrong for %lx\n", value);
117 if (bitpos != 63 - i) fprintf(stderr, "bitpos is wrong for %lx\n", value);
118 if (cc != 2) fprintf(stderr, "cc is wrong for %lx\n", value);