5b003b59ac
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>
64 lines
1.3 KiB
C
64 lines
1.3 KiB
C
/*
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* Test the CONVERT TO DECIMAL instruction.
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include <assert.h>
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#include <stdint.h>
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#include <stdlib.h>
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static uint64_t cvd(int32_t x)
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{
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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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}
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static uint64_t cvdy(int32_t x)
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{
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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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}
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static __uint128_t cvdg(int64_t x)
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{
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__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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}
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int main(void)
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{
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__uint128_t m = (((__uint128_t)0x9223372036854775) << 16) | 0x8070;
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assert(cvd(0) == 0xc);
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assert(cvd(1) == 0x1c);
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assert(cvd(25594) == 0x25594c);
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assert(cvd(-1) == 0x1d);
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assert(cvd(0x7fffffff) == 0x2147483647c);
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assert(cvd(-0x80000000) == 0x2147483648d);
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assert(cvdy(0) == 0xc);
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assert(cvdy(1) == 0x1c);
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assert(cvdy(25594) == 0x25594c);
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assert(cvdy(-1) == 0x1d);
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assert(cvdy(0x7fffffff) == 0x2147483647c);
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assert(cvdy(-0x80000000) == 0x2147483648d);
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assert(cvdg(0) == 0xc);
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assert(cvdg(1) == 0x1c);
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assert(cvdg(25594) == 0x25594c);
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assert(cvdg(-1) == 0x1d);
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assert(cvdg(0x7fffffffffffffff) == (m + 0xc));
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assert(cvdg(-0x8000000000000000) == (m + 0x1d));
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return EXIT_SUCCESS;
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}
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