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/*
* Test ADD LOGICAL WITH CARRY instructions.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include <stdio.h>
#include <stdlib.h>
static const struct test {
const char *name;
unsigned long values[3];
unsigned long exp_sum;
int exp_cc;
} tests[] = {
/*
* Each test starts with CC 0 and executes two chained ADD LOGICAL WITH
* CARRY instructions on three input values. The values must be compatible
* with both 32- and 64-bit test functions.
*/
/* NAME VALUES EXP_SUM EXP_CC */
{ "cc0->cc0", {0, 0, 0}, 0, 0, },
{ "cc0->cc1", {0, 0, 42}, 42, 1, },
/* cc0->cc2 is not possible */
/* cc0->cc3 is not possible */
/* cc1->cc0 is not possible */
{ "cc1->cc1", {-3, 1, 1}, -1, 1, },
{ "cc1->cc2", {-3, 1, 2}, 0, 2, },
{ "cc1->cc3", {-3, 1, -1}, -3, 3, },
/* cc2->cc0 is not possible */
{ "cc2->cc1", {-1, 1, 1}, 2, 1, },
{ "cc2->cc2", {-1, 1, -1}, 0, 2, },
/* cc2->cc3 is not possible */
/* cc3->cc0 is not possible */
{ "cc3->cc1", {-1, 2, 1}, 3, 1, },
{ "cc3->cc2", {-1, 2, -2}, 0, 2, },
{ "cc3->cc3", {-1, 2, -1}, 1, 3, },
};
/* Test ALCR (register variant) followed by ALC (memory variant). */
static unsigned long test32rm(unsigned long a, unsigned long b,
unsigned long c, int *cc)
{
unsigned int a32 = a, b32 = b, c32 = c;
asm("xr %[cc],%[cc]\n"
"alcr %[a],%[b]\n"
"alc %[a],%[c]\n"
"ipm %[cc]"
: [a] "+&r" (a32), [cc] "+&r" (*cc)
: [b] "r" (b32), [c] "T" (c32)
: "cc");
*cc >>= 28;
return (int)a32;
}
/* Test ALC (memory variant) followed by ALCR (register variant). */
static unsigned long test32mr(unsigned long a, unsigned long b,
unsigned long c, int *cc)
{
unsigned int a32 = a, b32 = b, c32 = c;
asm("xr %[cc],%[cc]\n"
"alc %[a],%[b]\n"
"alcr %[c],%[a]\n"
"ipm %[cc]"
: [a] "+&r" (a32), [c] "+&r" (c32), [cc] "+&r" (*cc)
: [b] "T" (b32)
: "cc");
*cc >>= 28;
return (int)c32;
}
/* Test ALCGR (register variant) followed by ALCG (memory variant). */
static unsigned long test64rm(unsigned long a, unsigned long b,
unsigned long c, int *cc)
{
asm("xr %[cc],%[cc]\n"
"alcgr %[a],%[b]\n"
"alcg %[a],%[c]\n"
"ipm %[cc]"
: [a] "+&r" (a), [cc] "+&r" (*cc)
: [b] "r" (b), [c] "T" (c)
: "cc");
*cc >>= 28;
return a;
}
/* Test ALCG (memory variant) followed by ALCGR (register variant). */
static unsigned long test64mr(unsigned long a, unsigned long b,
unsigned long c, int *cc)
{
asm("xr %[cc],%[cc]\n"
"alcg %[a],%[b]\n"
"alcgr %[c],%[a]\n"
"ipm %[cc]"
: [a] "+&r" (a), [c] "+&r" (c), [cc] "+&r" (*cc)
: [b] "T" (b)
: "cc");
*cc >>= 28;
return c;
}
static const struct test_func {
const char *name;
unsigned long (*ptr)(unsigned long, unsigned long, unsigned long, int *);
} test_funcs[] = {
{ "test32rm", test32rm },
{ "test32mr", test32mr },
{ "test64rm", test64rm },
{ "test64mr", test64mr },
};
static const struct test_perm {
const char *name;
size_t a_idx, b_idx, c_idx;
} test_perms[] = {
{ "a, b, c", 0, 1, 2 },
{ "b, a, c", 1, 0, 2 },
};
int main(void)
{
unsigned long a, b, c, sum;
int result = EXIT_SUCCESS;
const struct test_func *f;
const struct test_perm *p;
size_t i, j, k;
const struct test *t;
int cc;
for (i = 0; i < sizeof(tests) / sizeof(tests[0]); i++) {
t = &tests[i];
for (j = 0; j < sizeof(test_funcs) / sizeof(test_funcs[0]); j++) {
f = &test_funcs[j];
for (k = 0; k < sizeof(test_perms) / sizeof(test_perms[0]); k++) {
p = &test_perms[k];
a = t->values[p->a_idx];
b = t->values[p->b_idx];
c = t->values[p->c_idx];
sum = f->ptr(a, b, c, &cc);
if (sum != t->exp_sum || cc != t->exp_cc) {
fprintf(stderr,
"[ FAILED ] %s %s(0x%lx, 0x%lx, 0x%lx) returned 0x%lx cc %d, expected 0x%lx cc %d\n",
t->name, f->name, a, b, c, sum, cc,
t->exp_sum, t->exp_cc);
result = EXIT_FAILURE;
}
}
}
}
return result;
}
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