| … | |
… | |
| 581 | || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 |
581 | || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 |
| 582 | #define ECB_STDFP 1 |
582 | #define ECB_STDFP 1 |
| 583 | #include <string.h> /* for memcpy */ |
583 | #include <string.h> /* for memcpy */ |
| 584 | #else |
584 | #else |
| 585 | #define ECB_STDFP 0 |
585 | #define ECB_STDFP 0 |
|
|
586 | #endif |
|
|
587 | |
|
|
588 | #ifndef ECB_NO_LIBM |
|
|
589 | |
| 586 | #include <math.h> /* for frexp*, ldexp* */ |
590 | #include <math.h> /* for frexp*, ldexp* */ |
| 587 | #endif |
|
|
| 588 | |
591 | |
| 589 | #ifndef ECB_NO_LIBM |
592 | /* converts an ieee half/binary16 to a float */ |
|
|
593 | ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const; |
|
|
594 | ecb_function_ float |
|
|
595 | ecb_binary16_to_float (uint16_t x) |
|
|
596 | { |
|
|
597 | int e = (x >> 10) & 0x1f; |
|
|
598 | int m = x & 0x3ff; |
|
|
599 | float r; |
|
|
600 | |
|
|
601 | if (!e) |
|
|
602 | r = ldexpf (m , -24); |
|
|
603 | else if (e != 31) |
|
|
604 | r = ldexpf (m + 0x400, e - 25); |
|
|
605 | else if (m) |
|
|
606 | #ifdef NAN |
|
|
607 | r = NAN; |
|
|
608 | #endif |
|
|
609 | else |
|
|
610 | r = INFINITY; |
|
|
611 | |
|
|
612 | return x & 0x8000 ? -r : r; |
|
|
613 | } |
| 590 | |
614 | |
| 591 | /* convert a float to ieee single/binary32 */ |
615 | /* convert a float to ieee single/binary32 */ |
| 592 | ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const; |
616 | ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const; |
| 593 | ecb_function_ uint32_t |
617 | ecb_function_ uint32_t |
| 594 | ecb_float_to_binary32 (float x) |
618 | ecb_float_to_binary32 (float x) |
