36 lines
494 B
C
36 lines
494 B
C
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/*
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* Test the TEST AND SET 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 <stdlib.h>
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static int ts(char *p)
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{
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int cc;
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asm("ts %[p]\n"
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"ipm %[cc]"
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: [cc] "=r" (cc)
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, [p] "+Q" (*p)
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: : "cc");
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return (cc >> 28) & 3;
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}
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int main(void)
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{
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char c;
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c = 0x80;
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assert(ts(&c) == 1);
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assert(c == 0xff);
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c = 0x7f;
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assert(ts(&c) == 0);
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assert(c == 0xff);
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return EXIT_SUCCESS;
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}
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