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author | phk <phk@FreeBSD.org> | 2002-05-13 13:31:20 +0000 |
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committer | phk <phk@FreeBSD.org> | 2002-05-13 13:31:20 +0000 |
commit | a38b002c0bef457e70afe124452fb78691d1dea0 (patch) | |
tree | e9298121dbb9a587719499fa7801999a3d183ad6 /lib | |
parent | d529c32d2df41ece26d4d262804d66f1b34b9f39 (diff) | |
download | FreeBSD-src-a38b002c0bef457e70afe124452fb78691d1dea0.zip FreeBSD-src-a38b002c0bef457e70afe124452fb78691d1dea0.tar.gz |
Add __divdi3() and __moddi3() to libstand. We will need them for UFS2.
Sponsored by: DARPA & NAI Labs.
Diffstat (limited to 'lib')
-rw-r--r-- | lib/libstand/qdivrem.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/lib/libstand/qdivrem.c b/lib/libstand/qdivrem.c index c6fd4eb..584a0b1 100644 --- a/lib/libstand/qdivrem.c +++ b/lib/libstand/qdivrem.c @@ -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); +} |