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gallivm: Fix lp_build_exp2 order 4-5 polynomial coefficients and bump order.

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Not sure how I computed these, but they were wrong (which explains why
bumping the polynomial order before never improved precision).

This allows to pass the EXP test cases of PSPrecision/VSPrecision DCTs.
This commit is contained in:
José Fonseca 2011-07-20 14:53:08 -07:00
parent 47d6d44a23
commit af82ff556c
1 changed files with 12 additions and 12 deletions
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24
src/gallium/auxiliary/gallivm/lp_bld_arit.c
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@ -61,7 +61,7 @@
#include "lp_bld_arit.h"
#define EXP_POLY_DEGREE 3
#define EXP_POLY_DEGREE 5
#define LOG_POLY_DEGREE 5
@ -2218,18 +2218,18 @@ lp_build_polynomial(struct lp_build_context *bld,
*/
const double lp_build_exp2_polynomial[] = {
#if EXP_POLY_DEGREE == 5
0.999999999690134838155,
0.583974334321735217258,
0.164553105719676828492,
0.0292811063701710962255,
0.00354944426657875141846,
0.000296253726543423377365
0.999999925063526176901,
0.693153073200168932794,
0.240153617044375388211,
0.0558263180532956664775,
0.00898934009049466391101,
0.00187757667519147912699
#elif EXP_POLY_DEGREE == 4
1.00000001502262084505,
0.563586057338685991394,
0.150436017652442413623,
0.0243220604213317927308,
0.0025359088446580436489
1.00000259337069434683,
0.693003834469974940458,
0.24144275689150793076,
0.0520114606103070150235,
0.0135341679161270268764
#elif EXP_POLY_DEGREE == 3
0.999925218562710312959,
0.695833540494823811697,