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