tests/tcg/s390x: Test CONVERT TO DECIMAL

Check the CVD's, CVDY's, and CVDG's corner cases.

Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-ID: <20240205205830.6425-4-iii@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Ilya Leoshkevich 2024-02-05 21:54:55 +01:00 committed by Thomas Huth
parent b4b8d58e56
commit 5b003b59ac
2 changed files with 64 additions and 0 deletions

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@ -45,6 +45,7 @@ TESTS+=clc
TESTS+=laalg
TESTS+=add-logical-with-carry
TESTS+=lae
TESTS+=cvd
cdsg: CFLAGS+=-pthread
cdsg: LDFLAGS+=-pthread

63
tests/tcg/s390x/cvd.c Normal file
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@ -0,0 +1,63 @@
/*
* Test the CONVERT TO DECIMAL instruction.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include <assert.h>
#include <stdint.h>
#include <stdlib.h>
static uint64_t cvd(int32_t x)
{
uint64_t ret;
asm("cvd %[x],%[ret]" : [ret] "=R" (ret) : [x] "r" (x));
return ret;
}
static uint64_t cvdy(int32_t x)
{
uint64_t ret;
asm("cvdy %[x],%[ret]" : [ret] "=T" (ret) : [x] "r" (x));
return ret;
}
static __uint128_t cvdg(int64_t x)
{
__uint128_t ret;
asm("cvdg %[x],%[ret]" : [ret] "=T" (ret) : [x] "r" (x));
return ret;
}
int main(void)
{
__uint128_t m = (((__uint128_t)0x9223372036854775) << 16) | 0x8070;
assert(cvd(0) == 0xc);
assert(cvd(1) == 0x1c);
assert(cvd(25594) == 0x25594c);
assert(cvd(-1) == 0x1d);
assert(cvd(0x7fffffff) == 0x2147483647c);
assert(cvd(-0x80000000) == 0x2147483648d);
assert(cvdy(0) == 0xc);
assert(cvdy(1) == 0x1c);
assert(cvdy(25594) == 0x25594c);
assert(cvdy(-1) == 0x1d);
assert(cvdy(0x7fffffff) == 0x2147483647c);
assert(cvdy(-0x80000000) == 0x2147483648d);
assert(cvdg(0) == 0xc);
assert(cvdg(1) == 0x1c);
assert(cvdg(25594) == 0x25594c);
assert(cvdg(-1) == 0x1d);
assert(cvdg(0x7fffffffffffffff) == (m + 0xc));
assert(cvdg(-0x8000000000000000) == (m + 0x1d));
return EXIT_SUCCESS;
}