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77 lines
1.4 KiB
77 lines
1.4 KiB
#!/usr/local/bin/perl |
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# x86 assember |
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sub bn_mul_words |
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{ |
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local($name)=@_; |
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&function_begin($name,""); |
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&comment(""); |
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$Low="eax"; |
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$High="edx"; |
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$a="ebx"; |
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$w="ecx"; |
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$r="edi"; |
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$c="esi"; |
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$num="ebp"; |
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&xor($c,$c); # clear carry |
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&mov($r,&wparam(0)); # |
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&mov($a,&wparam(1)); # |
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&mov($num,&wparam(2)); # |
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&mov($w,&wparam(3)); # |
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&and($num,0xfffffff8); # num / 8 |
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&jz(&label("mw_finish")); |
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&set_label("mw_loop",0); |
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for ($i=0; $i<32; $i+=4) |
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{ |
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&comment("Round $i"); |
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&mov("eax",&DWP($i,$a,"",0)); # *a |
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&mul($w); # *a * w |
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&add("eax",$c); # L(t)+=c |
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# XXX |
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&adc("edx",0); # H(t)+=carry |
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&mov(&DWP($i,$r,"",0),"eax"); # *r= L(t); |
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&mov($c,"edx"); # c= H(t); |
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} |
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&comment(""); |
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&add($a,32); |
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&add($r,32); |
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&sub($num,8); |
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&jz(&label("mw_finish")); |
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&jmp(&label("mw_loop")); |
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&set_label("mw_finish",0); |
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&mov($num,&wparam(2)); # get num |
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&and($num,7); |
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&jnz(&label("mw_finish2")); |
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&jmp(&label("mw_end")); |
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&set_label("mw_finish2",1); |
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for ($i=0; $i<7; $i++) |
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{ |
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&comment("Tail Round $i"); |
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&mov("eax",&DWP($i*4,$a,"",0));# *a |
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&mul($w); # *a * w |
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&add("eax",$c); # L(t)+=c |
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# XXX |
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&adc("edx",0); # H(t)+=carry |
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&mov(&DWP($i*4,$r,"",0),"eax");# *r= L(t); |
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&mov($c,"edx"); # c= H(t); |
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&dec($num) if ($i != 7-1); |
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&jz(&label("mw_end")) if ($i != 7-1); |
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} |
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&set_label("mw_end",0); |
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&mov("eax",$c); |
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&function_end($name); |
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} |
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1;
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