78 lines
1.8 KiB
C
78 lines
1.8 KiB
C
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#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 rs, rt, dsp;
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int ach = 0, acl = 0;
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int resulth, resultl, resultdsp;
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rs = 0x80000000;
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rt = 0x80000000;
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resulth = 0x7FFFFFFF;
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resultl = 0xFFFFFFFF;
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resultdsp = 0x01;
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__asm
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("mthi %0, $ac1\n\t"
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"mtlo %0, $ac1\n\t"
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"dpaq_sa.l.w $ac1, %3, %4\n\t"
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"mfhi %0, $ac1\n\t"
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"mflo %1, $ac1\n\t"
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"rddsp %2\n\t"
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: "+r"(ach), "+r"(acl), "=r"(dsp)
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: "r"(rs), "r"(rt)
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);
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dsp = (dsp >> 17) & 0x01;
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assert(dsp == resultdsp);
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assert(ach == resulth);
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assert(acl == resultl);
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ach = 0x12;
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acl = 0x48;
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rs = 0x80000000;
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rt = 0x80000000;
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resulth = 0x7FFFFFFF;
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resultl = 0xFFFFFFFF;
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resultdsp = 0x01;
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__asm
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("mthi %0, $ac1\n\t"
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"mtlo %0, $ac1\n\t"
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"dpaq_sa.l.w $ac1, %3, %4\n\t"
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"mfhi %0, $ac1\n\t"
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"mflo %1, $ac1\n\t"
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"rddsp %2\n\t"
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: "+r"(ach), "+r"(acl), "=r"(dsp)
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: "r"(rs), "r"(rt)
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);
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dsp = (dsp >> 17) & 0x01;
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assert(dsp == resultdsp);
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assert(ach == resulth);
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assert(acl == resultl);
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ach = 0x741532A0;
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acl = 0xfceabb08;
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rs = 0x80000000;
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rt = 0x80000000;
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resulth = 0x7fffffff;
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resultl = 0xffffffff;
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resultdsp = 0x01;
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__asm
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("mthi %0, $ac1\n\t"
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"mtlo %0, $ac1\n\t"
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"dpaq_sa.l.w $ac1, %3, %4\n\t"
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"mfhi %0, $ac1\n\t"
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"mflo %1, $ac1\n\t"
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"rddsp %2\n\t"
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: "+r"(ach), "+r"(acl), "=r"(dsp)
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: "r"(rs), "r"(rt)
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);
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dsp = (dsp >> 17) & 0x01;
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assert(dsp == resultdsp);
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assert(ach == resulth);
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assert(acl == resultl);
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return 0;
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}
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