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Add __divdi3() and __moddi3() to libstand. We will need them for UFS2.

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Sponsored by:	DARPA & NAI Labs.
This commit is contained in:
Poul-Henning Kamp 2002-05-13 13:31:20 +00:00
parent 8f08b6b2ee
commit fd3eff9c02
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=96525
1 changed files with 48 additions and 0 deletions
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48
lib/libstand/qdivrem.c
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@ -303,3 +303,51 @@ __umoddi3(a, b)
(void)__qdivrem(a, b, &r);
return (r);
}
/*
* Divide two signed quads.
* ??? if -1/2 should produce -1 on this machine, this code is wrong
*/
quad_t
__divdi3(a, b)
quad_t a, b;
{
u_quad_t ua, ub, uq;
int neg;
if (a < 0)
ua = -(u_quad_t)a, neg = 1;
else
ua = a, neg = 0;
if (b < 0)
ub = -(u_quad_t)b, neg ^= 1;
else
ub = b;
uq = __qdivrem(ua, ub, (u_quad_t *)0);
return (neg ? -uq : uq);
}
/*
* Return remainder after dividing two signed quads.
*
* XXX
* If -1/2 should produce -1 on this machine, this code is wrong.
*/
quad_t
__moddi3(a, b)
quad_t a, b;
{
u_quad_t ua, ub, ur;
int neg;
if (a < 0)
ua = -(u_quad_t)a, neg = 1;
else
ua = a, neg = 0;
if (b < 0)
ub = -(u_quad_t)b;
else
ub = b;
(void)__qdivrem(ua, ub, &ur);
return (neg ? -ur : ur);
}