#include "maths.h"

int sin_table[sin_table_count] = {
	0x000, 0x00c, 0x019, 0x025, 0x032, 0x03e, 0x04b, 0x057,
	0x063, 0x070, 0x07c, 0x088, 0x094, 0x0a0, 0x0ac, 0x0b8,
	0x0c3, 0x0cf, 0x0da, 0x0e6, 0x0f1, 0x0fc, 0x107, 0x111,
	0x11c, 0x126, 0x130, 0x13a, 0x144, 0x14e, 0x157, 0x161,
	0x16a, 0x172, 0x17b, 0x183, 0x18b, 0x193, 0x19b, 0x1a2,
	0x1a9, 0x1b0, 0x1b7, 0x1bd, 0x1c3, 0x1c9, 0x1ce, 0x1d4,
	0x1d9, 0x1dd, 0x1e2, 0x1e6, 0x1e9, 0x1ed, 0x1f0, 0x1f3,
	0x1f6, 0x1f8, 0x1fa, 0x1fc, 0x1fd, 0x1fe, 0x1ff, 0x1ff,
	0x200, 0x1ff, 0x1ff, 0x1fe, 0x1fd, 0x1fc, 0x1fa, 0x1f8,
	0x1f6, 0x1f3, 0x1f0, 0x1ed, 0x1e9, 0x1e6, 0x1e2, 0x1dd,
	0x1d9, 0x1d4, 0x1ce, 0x1c9, 0x1c3, 0x1bd, 0x1b7, 0x1b0,
	0x1a9, 0x1a2, 0x19b, 0x193, 0x18b, 0x183, 0x17b, 0x172,
	0x16a, 0x161, 0x157, 0x14e, 0x144, 0x13a, 0x130, 0x126,
	0x11c, 0x111, 0x107, 0x0fc, 0x0f1, 0x0e6, 0x0da, 0x0cf,
	0x0c3, 0x0b8, 0x0ac, 0x0a0, 0x094, 0x088, 0x07c, 0x070,
	0x063, 0x057, 0x04b, 0x03e, 0x032, 0x025, 0x019, 0x00c,
};
int cos_table[sin_table_count];

void init_maths(void) {
	int i, hs = sin_table_count >> 1;
	for (
		i = hs;
		i <  sin_table_count;
		i++
	) {
		sin_table[i] = -sin_table[i - hs];
	}
	hs >>= 1;
	for (i = 0; i < sin_table_count; i++) {
		cos_table[i] = sin_table[(i + hs) & sin_table_mask];
	}
}