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Fixed position of tmp.f assigned like in dlls/d3d8/shader.c.

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Fixed strict aliasing problem.
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Marcus Meissner 2004-04-26 20:05:52 +00:00 committed by Alexandre Julliard
parent 6844c3b59b
commit 2b5b00b0ff
1 changed files with 10 additions and 7 deletions
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17
dlls/wined3d/vertexshader.c
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@ -116,14 +116,17 @@ void vshader_dst(D3DSHADERVECTOR* d, D3DSHADERVECTOR* s0, D3DSHADERVECTOR* s1) {
} }
void vshader_expp(D3DSHADERVECTOR* d, D3DSHADERVECTOR* s0) { void vshader_expp(D3DSHADERVECTOR* d, D3DSHADERVECTOR* s0) {
float tmp_f = floorf(s0->w); union {
DWORD tmp_d = 0; float f;
tmp_f = powf(2.0f, s0->w); DWORD d;
tmp_d = *((DWORD*) &tmp_f) & 0xFFFFFF00; } tmp;
d->x = powf(2.0f, tmp_f); tmp.f = floorf(s0->w);
d->y = s0->w - tmp_f; d->x = powf(2.0f, tmp.f);
d->z = *((float*) &tmp_d); d->y = s0->w - tmp.f;
tmp.f = powf(2.0f, s0->w);
tmp.d &= 0xFFFFFF00U;
d->z = tmp.f;
d->w = 1.0f; d->w = 1.0f;
VSTRACE(("executing exp: s0=(%f, %f, %f, %f) => d=(%f, %f, %f, %f)\n", VSTRACE(("executing exp: s0=(%f, %f, %f, %f) => d=(%f, %f, %f, %f)\n",
s0->x, s0->y, s0->z, s0->w, d->x, d->y, d->z, d->w)); s0->x, s0->y, s0->z, s0->w, d->x, d->y, d->z, d->w));