56 lines
1.2 KiB
C
56 lines
1.2 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 = 5, acl = 5;
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int resulth, resultl, resultdsp;
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rs = 0xBC0123AD;
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rt = 0x01643721;
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resulth = 0xfdf4cbe0;
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resultl = 0xd138776b;
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resultdsp = 0x00;
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__asm
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("mthi %0, $ac1\n\t"
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"mtlo %1, $ac1\n\t"
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"dpsq_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 = 0x54321123;
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acl = 5;
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rs = 0x80000000;
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rt = 0x80000000;
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resulth = 0xd4321123;
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resultl = 0x06;
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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 %1, $ac1\n\t"
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"dpsq_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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