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[/] [plasma/] [tags/] [V3_0/] [tools/] [mlite.c] - Diff between revs 43 and 52
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| Rev 43 |
Rev 52 |
| Line 126... |
Line 126... |
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void mult_big(unsigned long a,unsigned long b,
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void mult_big(unsigned long a,unsigned long b,
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unsigned long *hi,unsigned long *lo)
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unsigned long *hi,unsigned long *lo)
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{
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{
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unsigned long ahi,alo,bhi,blo;
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unsigned long ahi,alo,bhi,blo;
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unsigned long answer[3];
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unsigned long c0,c1,c2,c3;
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unsigned long c1_a,c1_b,c2_a,c2_b;
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ahi=a>>16;
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ahi=a>>16;
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alo=a&0xffff;
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alo=a&0xffff;
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bhi=b>>16;
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bhi=b>>16;
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blo=b&0xffff;
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blo=b&0xffff;
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answer[0]=alo*blo;
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answer[1]=ahi*blo+bhi*alo+(answer[0]>>16);
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c0=alo*blo;
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answer[0]&=0xffff;
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c1_a=ahi*blo;
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answer[2]=ahi*bhi+(answer[1]>>16);
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c1_b=alo*bhi;
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answer[1]&=0xffff;
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c2=ahi*bhi;
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*hi=answer[2];
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*lo=(answer[1]<<16)+answer[0];
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c2+=(c1_a>>16)+(c1_b>>16);
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c1=(c1_a&0xffff)+(c1_b&0xffff)+(c0>>16);
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c0&=0xffff;
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c2+=(c1>>16);
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c1&=0xffff;
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*hi=c2;
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*lo=(c1<<16)+c0;
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}
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}
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//execute one cycle of a Plasma CPU
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//execute one cycle of a Plasma CPU
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void cycle(State *s,int show_mode)
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void cycle(State *s,int show_mode)
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{
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{
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