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[qfvis] Fix a vector type error

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I suspect I wasn't getting nan like I wanted.
This commit is contained in:
Bill Currie 2022-03-31 01:17:47 +09:00
parent 12300d9a98
commit 73c65749fc
1 changed files with 2 additions and 2 deletions
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4
tools/qfvis/source/qfvis.c
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@ -240,9 +240,9 @@ split_edge (const vec4f_t *points, const vec4f_t *dists,
// component to the split-plane's distance when the split-plane's
// normal is signed-canonical.
// "nan" because 0x7fffffff is nan when viewed as a float
static const vec4f_t onenan = { 1, 1, 1, ~0u >> 1 };
static const vec4i_t onenan = {0x3f800000,0x3f800000,0x3f800000,~0u >> 1};
static const vec4i_t nan = { ~0u >> 1, ~0u >> 1, ~0u >> 1, ~0u >> 1};
vec4i_t x = _mm_and_ps (split, (__m128) nan) == onenan;
vec4i_t x = _mm_and_ps (split, (__m128) nan) == (__m128) onenan;
// plane vector has -dist in w
vec4f_t y = _mm_and_ps (split, (__m128) x) * -split[3];
#ifdef __SSE3__