qemu/tests/tcg/s390x/csst.c
Richard Henderson 62a31161ee tests/tcg/s390x: Fix alignment of csst parameter list
The parameter list given in general register 1 shall be aligned
on a quadword boundary.  This test currently succeeds or fails
depending on the compiler version used and the accidential layout
of the function's stack frame.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
2019-06-21 15:26:53 +02:00

44 lines
973 B
C

#include <stdint.h>
#include <unistd.h>
int main(void)
{
uint64_t parmlist[] __attribute__((aligned(16))) = {
0xfedcba9876543210ull,
0,
0x7777777777777777ull,
0,
};
uint64_t op1 = 0x0123456789abcdefull;
uint64_t op2 = 0;
uint64_t op3 = op1;
uint64_t cc;
asm volatile(
" lghi %%r0,%[flags]\n"
" la %%r1,%[parmlist]\n"
" csst %[op1],%[op2],%[op3]\n"
" ipm %[cc]\n"
: [op1] "+m" (op1),
[op2] "+m" (op2),
[op3] "+r" (op3),
[cc] "=r" (cc)
: [flags] "K" (0x0301),
[parmlist] "m" (parmlist)
: "r0", "r1", "cc", "memory");
cc = (cc >> 28) & 3;
if (cc) {
write(1, "bad cc\n", 7);
return 1;
}
if (op1 != parmlist[0]) {
write(1, "bad op1\n", 8);
return 1;
}
if (op2 != parmlist[2]) {
write(1, "bad op2\n", 8);
return 1;
}
return 0;
}