|
unsigned long
|
|
udivmodsi4(unsigned long num, unsigned long den, int modwanted)
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|
{
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unsigned long bit = 1;
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unsigned long res = 0;
|
|
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while (den < num && bit && !(den & (1L<<31)))
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{
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den <<=1;
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bit <<=1;
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}
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while (bit)
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|
{
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|
if (num >= den)
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|
{
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|
num -= den;
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|
res |= bit;
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|
}
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bit >>=1;
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den >>=1;
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}
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if (modwanted) return num;
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return res;
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|
}
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|
|
|
long
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|
__udivsi3 (long a, long b)
|
|
{
|
|
return udivmodsi4 (a, b, 0);
|
|
}
|
|
|
|
long
|
|
__umodsi3 (long a, long b)
|
|
{
|
|
return udivmodsi4 (a, b, 1);
|
|
}
|
|
|
|
long
|
|
__divsi3 (long a, long b)
|
|
{
|
|
int neg = 0;
|
|
long res;
|
|
|
|
if (a < 0)
|
|
{
|
|
a = -a;
|
|
neg = !neg;
|
|
}
|
|
|
|
if (b < 0)
|
|
{
|
|
b = -b;
|
|
neg = !neg;
|
|
}
|
|
|
|
res = udivmodsi4 (a, b, 0);
|
|
|
|
if (neg)
|
|
res = -res;
|
|
|
|
return res;
|
|
}
|
|
|
|
long
|
|
__modsi3 (long a, long b)
|
|
{
|
|
int neg = 0;
|
|
long res;
|
|
|
|
if (a < 0)
|
|
{
|
|
a = -a;
|
|
neg = 1;
|
|
}
|
|
|
|
if (b < 0)
|
|
b = -b;
|
|
|
|
res = udivmodsi4 (a, b, 1);
|
|
|
|
if (neg)
|
|
res = -res;
|
|
|
|
return res;
|
|
}
|
|
|