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test_sub.c
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#include <stdio.h>
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int main(void)
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{
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int a, b;
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int result;
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a = 0x100;
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b = 0x100;
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result = 0x0;
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__asm
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("l.sub %0, %0, %1\n\t"
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: "+r"(a)
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: "r"(b)
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);
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if (a != result) {
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printf("sub error\n");
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return -1;
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}
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a = 0xffff;
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b = 0x1;
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result = 0xfffe;
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__asm
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("l.sub %0, %0, %1\n\t"
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: "+r"(a)
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: "r"(b)
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);
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if (a != result) {
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printf("sub error\n");
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return -1;
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}
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return 0;
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}