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need to use absolute value for RSQ

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This commit is contained in:
Brian Paul 2005-10-30 16:52:02 +00:00
parent 5d04101d18
commit 094a1ddf24
1 changed files with 2 additions and 1 deletions
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3
src/mesa/swrast/s_nvfragprog.c
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@ -1031,10 +1031,11 @@ execute_program( GLcontext *ctx,
{
GLfloat a[4], result[4];
fetch_vector1( ctx, &inst->SrcReg[0], machine, program, a );
a[0] = FABSF(a[0]);
result[0] = result[1] = result[2] = result[3] = INV_SQRTF(a[0]);
store_vector4( inst, machine, result );
#if DEBUG_FRAG
printf("RSQ %g = 1/sqrt(%g)\n", result[0], a[0]);
printf("RSQ %g = 1/sqrt(|%g|)\n", result[0], a[0]);
#endif
}
break;