#ifndef EINA_INLINE_F32P32_X_
# define EINA_INLINE_F32P32_X_
+#include <stdlib.h>
+
static inline Eina_F32p32
eina_f32p32_add(Eina_F32p32 a, Eina_F32p32 b)
{
eina_f32p32_mul(Eina_F32p32 a, Eina_F32p32 b)
{
/* Prevent overflow and do '(a * b) >> 32' */
- /* f32p32 * f32p32 = f64p64 */
- /* f16p16 * f16p16 = f32p32 */
+ /* Basically do: Eina_F16p16 * Eina_F16p16 = Eina_F32p32 */
Eina_F32p32 up;
Eina_F32p32 down;
Eina_F32p32 result;
+ uint64_t as, bs;
+ Eina_F32p32 sign;
+
+ sign = a ^ b;
+ as = llabs(a);
+ bs = llabs(b);
- up = (a >> 16) * (b >> 16);
- down = (a & 0xFFFF) * (b & 0xFFFF);
+ up = (as >> 16) * (bs >> 16);
+ down = (as & 0xFFFF) * (bs & 0xFFFF);
result = up + (down >> 32);
- return result;
+ return sign < 0 ? - result : result;
}
static inline Eina_F32p32
static inline Eina_F32p32
eina_f32p32_div(Eina_F32p32 a, Eina_F32p32 b)
{
- /* Prevent overflow and do '(a << 32) / b' */
- /* f32p64 / f32p32 = f32p32 */
- /* f32p32 / f32p32 = f32p0 */
- Eina_F32p32 up;
- Eina_F32p32 down;
+ Eina_F32p32 sign;
Eina_F32p32 result;
- up = (a / b) << 32;
- down = (a << 32) / b;
+ sign = a ^ b;
+
+ if (b == 0)
+ return sign < 0 ? (Eina_F32p32) 0x8000000000000000 : (Eina_F32p32) 0x7FFFFFFFFFFFFFFF;
- result = up + down;
+ result = (eina_f32p32_mul(llabs(a), (((uint64_t) 1 << 62) / ((uint64_t)(llabs(b)) >> 2))));
- return result;
+ return sign < 0 ? - result : result;
}
static inline Eina_F32p32