59 lines
1.1 KiB
C
59 lines
1.1 KiB
C
#include<stdio.h>
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#include<assert.h>
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int main()
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{
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int rd, rs, rt, dsp;
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int result, resultdsp;
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rs = 0x12345678;
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rt = 0x87654321;
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result = 0x7FFF1357;
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resultdsp = 0x01;
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__asm
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("wrdsp $0\n\t"
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"subq_s.ph %0, %2, %3\n\t"
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"rddsp %1\n\t"
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: "=r"(rd), "=r"(dsp)
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: "r"(rs), "r"(rt)
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);
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dsp = (dsp >> 20) & 0x01;
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assert(dsp == resultdsp);
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assert(rd == result);
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rs = 0x12348000;
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rt = 0x87657000;
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result = 0x7FFF8000;
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resultdsp = 0x01;
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__asm
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("wrdsp $0\n\t"
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"subq_s.ph %0, %2, %3\n\t"
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"rddsp %1\n\t"
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: "=r"(rd), "=r"(dsp)
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: "r"(rs), "r"(rt)
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);
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dsp = (dsp >> 20) & 0x01;
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assert(dsp == resultdsp);
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assert(rd == result);
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rs = 0x12340000;
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rt = 0x87658000;
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result = 0x7FFF7FFF;
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resultdsp = 0x01;
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__asm
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("wrdsp $0\n\t"
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"subq_s.ph %0, %2, %3\n\t"
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"rddsp %1\n\t"
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: "=r"(rd), "=r"(dsp)
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: "r"(rs), "r"(rt)
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);
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dsp = (dsp >> 20) & 0x01;
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assert(dsp == resultdsp);
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assert(rd == result);
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return 0;
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}
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