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tests/tcg/s390x: Test ADD LOGICAL WITH CARRY
Add a test that tries different combinations of ADD LOGICAL WITH CARRY instructions. Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Message-ID: <20231106093605.1349201-6-iii@linux.ibm.com> Signed-off-by: Thomas Huth <thuth@redhat.com>
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/* | ||
* Test ADD LOGICAL WITH CARRY instructions. | ||
* | ||
* SPDX-License-Identifier: GPL-2.0-or-later | ||
*/ | ||
#include <stdio.h> | ||
#include <stdlib.h> | ||
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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. | ||
*/ | ||
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/* 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, }, | ||
}; | ||
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/* 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; | ||
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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; | ||
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return (int)a32; | ||
} | ||
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/* 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; | ||
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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; | ||
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return (int)c32; | ||
} | ||
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/* 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; | ||
} | ||
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/* 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; | ||
} | ||
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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 }, | ||
}; | ||
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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 }, | ||
}; | ||
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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; | ||
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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; | ||
} | ||
} | ||
} | ||
} | ||
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return result; | ||
} |