diff options
Diffstat (limited to 'apps/plugins/pdbox/pdbox-func.c')
| -rw-r--r-- | apps/plugins/pdbox/pdbox-func.c | 49 |
1 files changed, 19 insertions, 30 deletions
diff --git a/apps/plugins/pdbox/pdbox-func.c b/apps/plugins/pdbox/pdbox-func.c index c5e81ed7b9..22c8714b3f 100644 --- a/apps/plugins/pdbox/pdbox-func.c +++ b/apps/plugins/pdbox/pdbox-func.c @@ -333,11 +333,19 @@ long rb_atol(const char* str) float rb_sin(float rad) { + int cycles; + /* Trim input value to -PI..PI interval. */ - if(rad < -3.14159265) - rad += 6.28318531; - else if(rad > 3.14159265) - rad -= 6.28318531; + if(rad > 3.14159265) + { + cycles = rad / 6.28318531; + rad -= (6.28318531 * (float) cycles); + } + else if(rad < -3.14159265) + { + cycles = rad / -6.28318531; + rad += (6.28318531 * (float) cycles); + } if(rad < 0) return (1.27323954 * rad + 0.405284735 * rad * rad); @@ -348,11 +356,7 @@ float rb_sin(float rad) float rb_cos(float rad) { /* Compute cosine: sin(x + PI/2) = cos(x) */ - rad += 1.57079632; - if(rad > 3.14159265) - rad -= 6.28318531; - - return rb_sin(rad); + return rb_sin(rad + 1.57079632); } @@ -2108,54 +2112,39 @@ union ieee754_double /* This is the IEEE 754 double-precision format. */ struct { -#if defined(ROCKBOX_BIG_ENDIAN) +#ifdef ROCKBOX_BIG_ENDIAN unsigned int negative:1; unsigned int exponent:11; /* Together these comprise the mantissa. */ unsigned int mantissa0:20; unsigned int mantissa1:32; -#else -# if __FLOAT_WORD_ORDER == __BIG_ENDIAN - unsigned int mantissa0:20; - unsigned int exponent:11; - unsigned int negative:1; - unsigned int mantissa1:32; -# else +#else /* ROCKBOX_LITTLE_ENDIAN */ /* Together these comprise the mantissa. */ unsigned int mantissa1:32; unsigned int mantissa0:20; unsigned int exponent:11; unsigned int negative:1; -# endif -#endif /* Little endian. */ +#endif /* ROCKBOX_LITTLE_ENDIAN */ } ieee; /* This format makes it easier to see if a NaN is a signalling NaN. */ struct { -#if defined(ROCKBOX_BIG_ENDIAN) +#ifdef ROCKBOX_BIG_ENDIAN unsigned int negative:1; unsigned int exponent:11; unsigned int quiet_nan:1; /* Together these comprise the mantissa. */ unsigned int mantissa0:19; unsigned int mantissa1:32; -#else -# if __FLOAT_WORD_ORDER == __BIG_ENDIAN - unsigned int mantissa0:19; - unsigned int quiet_nan:1; - unsigned int exponent:11; - unsigned int negative:1; - unsigned int mantissa1:32; -# else +#else /* ROCKBOX_LITTLE_ENDIAN */ /* Together these comprise the mantissa. */ unsigned int mantissa1:32; unsigned int mantissa0:19; unsigned int quiet_nan:1; unsigned int exponent:11; unsigned int negative:1; -# endif -#endif +#endif /* ROCKBOX_LITTLE_ENDIAN */ } ieee_nan; }; |