49 lines
1.0 KiB
C
49 lines
1.0 KiB
C
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#include <stdint.h>
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#include <unistd.h>
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int main(void)
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{
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char op1[] = "hello";
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char op2[256];
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uint64_t r1 = 0xffffffffffffffffull;
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uint64_t r2 = 0xffffffffffffffffull;
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uint64_t cc;
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int i;
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for (i = 0; i < 256; i++) {
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if (i == 0) {
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op2[i] = 0xaa;
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} else {
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op2[i] = 0;
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}
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}
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asm volatile(
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" j 2f\n"
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"1: trt 0(1,%[op1]),0(%[op2])\n"
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"2: exrl %[op1_len],1b\n"
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" lgr %[r1],%%r1\n"
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" lgr %[r2],%%r2\n"
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" ipm %[cc]\n"
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: [r1] "+r" (r1),
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[r2] "+r" (r2),
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[cc] "=r" (cc)
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: [op1] "r" (&op1),
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[op1_len] "r" (5),
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[op2] "r" (&op2)
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: "r1", "r2", "cc");
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cc = (cc >> 28) & 3;
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if (cc != 2) {
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write(1, "bad cc\n", 7);
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return 1;
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}
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if ((char *)r1 != &op1[5]) {
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write(1, "bad r1\n", 7);
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return 1;
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}
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if (r2 != 0xffffffffffffffaaull) {
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write(1, "bad r2\n", 7);
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return 1;
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}
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return 0;
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}
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