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[tessellator] Avoid implicit promotion to 64bit integer.

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Avoid passing a 32bit integer as a cairo_int64_t in case we do not have a
64bit native integral type. As a side-effect this means we can also use a
narrower multiply.
This commit is contained in:
Chris Wilson 2008-10-07 09:43:45 +01:00
parent eaa4bd1392
commit 6b8c055962
1 changed files with 10 additions and 10 deletions
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20
src/cairo-bentley-ottmann.c
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@ -584,17 +584,17 @@ det32_64 (int32_t a,
}
static inline cairo_int128_t
det64_128 (cairo_int64_t a,
cairo_int64_t b,
cairo_int64_t c,
cairo_int64_t d)
det64x32_128 (cairo_int64_t a,
int32_t b,
cairo_int64_t c,
int32_t d)
{
cairo_int128_t ad;
cairo_int128_t bc;
/* det = a * d - b * c */
ad = _cairo_int64x64_128_mul (a, d);
bc = _cairo_int64x64_128_mul (b, c);
ad = _cairo_int64x32_128_mul (a, d);
bc = _cairo_int64x32_128_mul (c, b);
return _cairo_int128_sub (ad, bc);
}
@ -636,8 +636,8 @@ intersect_lines (cairo_bo_edge_t *a,
b->bottom.x, b->bottom.y);
/* x = det (a_det, dx1, b_det, dx2) / den_det */
qr = _cairo_int_96by64_32x64_divrem (det64_128 (a_det, dx1,
b_det, dx2),
qr = _cairo_int_96by64_32x64_divrem (det64x32_128 (a_det, dx1,
b_det, dx2),
den_det);
if (_cairo_int64_eq (qr.rem, den_det))
return CAIRO_BO_STATUS_NO_INTERSECTION;
@ -645,8 +645,8 @@ intersect_lines (cairo_bo_edge_t *a,
intersection->x.exactness = qr.rem ? INEXACT : EXACT;
/* y = det (a_det, dy1, b_det, dy2) / den_det */
qr = _cairo_int_96by64_32x64_divrem (det64_128 (a_det, dy1,
b_det, dy2),
qr = _cairo_int_96by64_32x64_divrem (det64x32_128 (a_det, dy1,
b_det, dy2),
den_det);
if (_cairo_int64_eq (qr.rem, den_det))
return CAIRO_BO_STATUS_NO_INTERSECTION;