enlightenment/efl
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eina: fix a rounding issue in eina_f32p32_{cos,sin} when getting close to 1.0. 

Bug only showed up if above 0.999 .


SVN revision: 70831
This commit is contained in:
Cedric BAIL 2012-05-07 01:46:37 +00:00
parent 59a132264f
commit 7d400fb5d9
3 changed files with 9 additions and 4 deletions
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4
legacy/eina/ChangeLog
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@ -266,3 +266,7 @@
2012-04-30 Jérôme Pinot
* Add missing files in the tarballs.
2012-05-06 Cedric Bail
* Fix a rounding issue near 1.0 for eina_f32p32_cos and eina_f32p32_sin.

1
legacy/eina/NEWS
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@ -8,6 +8,7 @@ Additions:
Fixes:
* Add missing files in the tarball.
* Rounding issue with eina_f32p32_cos and eina_f32p32_sin when getting close to 1.0.
Eina 1.2.0

8
legacy/eina/src/lib/eina_fp.c
View File

@ -449,7 +449,7 @@ eina_f32p32_cos(Eina_F32p32 a)
/* Find which case from 0 to 2 * PI */
remainder_2PI = a - (a / F32P32_2PI) * F32P32_2PI;
interpol = eina_f32p32_div(eina_f32p32_scale(remainder_PI, MAX_PREC * 2),
interpol = eina_f32p32_div(eina_f32p32_scale(remainder_PI, (MAX_PREC - 1) * 2),
EINA_F32P32_PI);
idx = eina_f32p32_int_to(interpol);
if (idx >= MAX_PREC)
@ -504,15 +504,15 @@ eina_f32p32_sin(Eina_F32p32 a)
/* Find which case from 0 to 2 * PI */
remainder_2PI = a - (a / F32P32_2PI) * F32P32_2PI;
interpol = eina_f32p32_div(eina_f32p32_scale(remainder_PI, MAX_PREC * 2),
interpol = eina_f32p32_div(eina_f32p32_scale(remainder_PI, (MAX_PREC - 1) * 2),
EINA_F32P32_PI);
idx = eina_f32p32_int_to(interpol);
if (idx >= MAX_PREC)
idx = 2 * MAX_PREC - (idx + 1);
idx = 2 * MAX_PREC - (idx + 1);
index2 = idx + 1;
if (index2 == MAX_PREC)
index2 = idx - 1;
index2 = idx - 1;
result = eina_f32p32_add(eina_trigo[idx],
eina_f32p32_mul(eina_f32p32_sub(eina_trigo[idx],