| 1 | /* |
1 | /* |
| 2 | * libecb - http://software.schmorp.de/pkg/libecb |
2 | * libecb - http://software.schmorp.de/pkg/libecb |
| 3 | * |
3 | * |
| 4 | * Copyright (©) 2009-2015,2018-2020 Marc Alexander Lehmann <libecb@schmorp.de> |
4 | * Copyright (©) 2009-2015,2018-2021 Marc Alexander Lehmann <libecb@schmorp.de> |
| 5 | * Copyright (©) 2011 Emanuele Giaquinta |
5 | * Copyright (©) 2011 Emanuele Giaquinta |
| 6 | * All rights reserved. |
6 | * All rights reserved. |
| 7 | * |
7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without modifica- |
8 | * Redistribution and use in source and binary forms, with or without modifica- |
| 9 | * tion, are permitted provided that the following conditions are met: |
9 | * tion, are permitted provided that the following conditions are met: |
| … | |
… | |
| 40 | |
40 | |
| 41 | #ifndef ECB_H |
41 | #ifndef ECB_H |
| 42 | #define ECB_H |
42 | #define ECB_H |
| 43 | |
43 | |
| 44 | /* 16 bits major, 16 bits minor */ |
44 | /* 16 bits major, 16 bits minor */ |
| 45 | #define ECB_VERSION 0x00010008 |
45 | #define ECB_VERSION 0x0001000b |
| 46 | |
46 | |
| 47 | #include <string.h> /* for memcpy */ |
47 | #include <string.h> /* for memcpy */ |
| 48 | |
48 | |
| 49 | #ifdef _WIN32 |
49 | #if defined (_WIN32) && !defined (__MINGW32__) |
| 50 | typedef signed char int8_t; |
50 | typedef signed char int8_t; |
| 51 | typedef unsigned char uint8_t; |
51 | typedef unsigned char uint8_t; |
| 52 | typedef signed char int_fast8_t; |
52 | typedef signed char int_fast8_t; |
| 53 | typedef unsigned char uint_fast8_t; |
53 | typedef unsigned char uint_fast8_t; |
| 54 | typedef signed short int16_t; |
54 | typedef signed short int16_t; |
| … | |
… | |
| 102 | #if _ILP32 |
102 | #if _ILP32 |
| 103 | #define ECB_AMD64_X32 1 |
103 | #define ECB_AMD64_X32 1 |
| 104 | #else |
104 | #else |
| 105 | #define ECB_AMD64 1 |
105 | #define ECB_AMD64 1 |
| 106 | #endif |
106 | #endif |
|
|
107 | #endif |
|
|
108 | |
|
|
109 | #if ECB_PTRSIZE >= 8 || ECB_AMD64_X32 |
|
|
110 | #define ECB_64BIT_NATIVE 1 |
|
|
111 | #else |
|
|
112 | #define ECB_64BIT_NATIVE 0 |
| 107 | #endif |
113 | #endif |
| 108 | |
114 | |
| 109 | /* many compilers define _GNUC_ to some versions but then only implement |
115 | /* many compilers define _GNUC_ to some versions but then only implement |
| 110 | * what their idiot authors think are the "more important" extensions, |
116 | * what their idiot authors think are the "more important" extensions, |
| 111 | * causing enormous grief in return for some better fake benchmark numbers. |
117 | * causing enormous grief in return for some better fake benchmark numbers. |
| … | |
… | |
| 242 | #if ECB_GCC_VERSION(4,7) |
248 | #if ECB_GCC_VERSION(4,7) |
| 243 | /* see comment below (stdatomic.h) about the C11 memory model. */ |
249 | /* see comment below (stdatomic.h) about the C11 memory model. */ |
| 244 | #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST) |
250 | #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST) |
| 245 | #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE) |
251 | #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE) |
| 246 | #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE) |
252 | #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE) |
|
|
253 | #undef ECB_MEMORY_FENCE_RELAXED |
| 247 | #define ECB_MEMORY_FENCE_RELAXED __atomic_thread_fence (__ATOMIC_RELAXED) |
254 | #define ECB_MEMORY_FENCE_RELAXED __atomic_thread_fence (__ATOMIC_RELAXED) |
| 248 | |
255 | |
| 249 | #elif ECB_CLANG_EXTENSION(c_atomic) |
256 | #elif ECB_CLANG_EXTENSION(c_atomic) |
| 250 | /* see comment below (stdatomic.h) about the C11 memory model. */ |
257 | /* see comment below (stdatomic.h) about the C11 memory model. */ |
| 251 | #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST) |
258 | #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST) |
| 252 | #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE) |
259 | #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE) |
| 253 | #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE) |
260 | #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE) |
|
|
261 | #undef ECB_MEMORY_FENCE_RELAXED |
| 254 | #define ECB_MEMORY_FENCE_RELAXED __c11_atomic_thread_fence (__ATOMIC_RELAXED) |
262 | #define ECB_MEMORY_FENCE_RELAXED __c11_atomic_thread_fence (__ATOMIC_RELAXED) |
| 255 | |
263 | |
| 256 | #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ |
264 | #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__ |
| 257 | #define ECB_MEMORY_FENCE __sync_synchronize () |
265 | #define ECB_MEMORY_FENCE __sync_synchronize () |
| 258 | #elif _MSC_VER >= 1500 /* VC++ 2008 */ |
266 | #elif _MSC_VER >= 1500 /* VC++ 2008 */ |
| … | |
… | |
| 601 | ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count); |
609 | ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count); |
| 602 | ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count); |
610 | ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count); |
| 603 | ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count); |
611 | ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count); |
| 604 | ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count); |
612 | ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count); |
| 605 | |
613 | |
| 606 | ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); } |
614 | ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> (-count & 7)) | (x << (count & 7)); } |
| 607 | ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); } |
615 | ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << (-count & 7)) | (x >> (count & 7)); } |
| 608 | ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); } |
616 | ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (-count & 15)) | (x << (count & 15)); } |
| 609 | ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); } |
617 | ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (-count & 15)) | (x >> (count & 15)); } |
| 610 | ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); } |
618 | ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (-count & 31)) | (x << (count & 31)); } |
| 611 | ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); } |
619 | ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (-count & 31)) | (x >> (count & 31)); } |
| 612 | ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); } |
620 | ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (-count & 63)) | (x << (count & 63)); } |
| 613 | ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); } |
621 | ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (-count & 63)) | (x >> (count & 63)); } |
| 614 | |
622 | |
| 615 | #if ECB_CPP |
623 | #if ECB_CPP |
| 616 | |
624 | |
| 617 | inline uint8_t ecb_ctz (uint8_t v) { return ecb_ctz32 (v); } |
625 | inline uint8_t ecb_ctz (uint8_t v) { return ecb_ctz32 (v); } |
| 618 | inline uint16_t ecb_ctz (uint16_t v) { return ecb_ctz32 (v); } |
626 | inline uint16_t ecb_ctz (uint16_t v) { return ecb_ctz32 (v); } |
| … | |
… | |
| 766 | ecb_inline void ecb_poke_u64_u (void *ptr, uint64_t v) { memcpy (ptr, &v, sizeof (v)); } |
774 | ecb_inline void ecb_poke_u64_u (void *ptr, uint64_t v) { memcpy (ptr, &v, sizeof (v)); } |
| 767 | |
775 | |
| 768 | ecb_inline void ecb_poke_be_u16_u (void *ptr, uint_fast16_t v) { ecb_poke_u16_u (ptr, ecb_host_to_be_u16 (v)); } |
776 | ecb_inline void ecb_poke_be_u16_u (void *ptr, uint_fast16_t v) { ecb_poke_u16_u (ptr, ecb_host_to_be_u16 (v)); } |
| 769 | ecb_inline void ecb_poke_be_u32_u (void *ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_be_u32 (v)); } |
777 | ecb_inline void ecb_poke_be_u32_u (void *ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_be_u32 (v)); } |
| 770 | ecb_inline void ecb_poke_be_u64_u (void *ptr, uint_fast64_t v) { ecb_poke_u64_u (ptr, ecb_host_to_be_u64 (v)); } |
778 | ecb_inline void ecb_poke_be_u64_u (void *ptr, uint_fast64_t v) { ecb_poke_u64_u (ptr, ecb_host_to_be_u64 (v)); } |
| 771 | |
779 | |
| 772 | ecb_inline void ecb_poke_le_u16_u (void *ptr, uint_fast16_t v) { ecb_poke_u16_u (ptr, ecb_host_to_le_u16 (v)); } |
780 | ecb_inline void ecb_poke_le_u16_u (void *ptr, uint_fast16_t v) { ecb_poke_u16_u (ptr, ecb_host_to_le_u16 (v)); } |
| 773 | ecb_inline void ecb_poke_le_u32_u (void *ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_le_u32 (v)); } |
781 | ecb_inline void ecb_poke_le_u32_u (void *ptr, uint_fast32_t v) { ecb_poke_u32_u (ptr, ecb_host_to_le_u32 (v)); } |
| 774 | ecb_inline void ecb_poke_le_u64_u (void *ptr, uint_fast64_t v) { ecb_poke_u64_u (ptr, ecb_host_to_le_u64 (v)); } |
782 | ecb_inline void ecb_poke_le_u64_u (void *ptr, uint_fast64_t v) { ecb_poke_u64_u (ptr, ecb_host_to_le_u64 (v)); } |
| 775 | |
783 | |
| 776 | #if ECB_CPP |
784 | #if ECB_CPP |
| … | |
… | |
| 799 | template<typename T> inline void ecb_poke_le_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_le (v)); } |
807 | template<typename T> inline void ecb_poke_le_u (void *ptr, T v) { return ecb_poke_u<T> (ptr, ecb_host_to_le (v)); } |
| 800 | |
808 | |
| 801 | #endif |
809 | #endif |
| 802 | |
810 | |
| 803 | /*****************************************************************************/ |
811 | /*****************************************************************************/ |
|
|
812 | /* pointer/integer hashing */ |
|
|
813 | |
|
|
814 | /* based on hash by Chris Wellons, https://nullprogram.com/blog/2018/07/31/ */ |
|
|
815 | ecb_function_ uint32_t ecb_mix32 (uint32_t v); |
|
|
816 | ecb_function_ uint32_t ecb_mix32 (uint32_t v) |
|
|
817 | { |
|
|
818 | v ^= v >> 16; v *= 0x7feb352dU; |
|
|
819 | v ^= v >> 15; v *= 0x846ca68bU; |
|
|
820 | v ^= v >> 16; |
|
|
821 | return v; |
|
|
822 | } |
|
|
823 | |
|
|
824 | ecb_function_ uint32_t ecb_unmix32 (uint32_t v); |
|
|
825 | ecb_function_ uint32_t ecb_unmix32 (uint32_t v) |
|
|
826 | { |
|
|
827 | v ^= v >> 16 ; v *= 0x43021123U; |
|
|
828 | v ^= v >> 15 ^ v >> 30; v *= 0x1d69e2a5U; |
|
|
829 | v ^= v >> 16 ; |
|
|
830 | return v; |
|
|
831 | } |
|
|
832 | |
|
|
833 | /* based on splitmix64, by Sebastiona Vigna, https://prng.di.unimi.it/splitmix64.c */ |
|
|
834 | ecb_function_ uint64_t ecb_mix64 (uint64_t v); |
|
|
835 | ecb_function_ uint64_t ecb_mix64 (uint64_t v) |
|
|
836 | { |
|
|
837 | v ^= v >> 30; v *= 0xbf58476d1ce4e5b9U; |
|
|
838 | v ^= v >> 27; v *= 0x94d049bb133111ebU; |
|
|
839 | v ^= v >> 31; |
|
|
840 | return v; |
|
|
841 | } |
|
|
842 | |
|
|
843 | ecb_function_ uint64_t ecb_unmix64 (uint64_t v); |
|
|
844 | ecb_function_ uint64_t ecb_unmix64 (uint64_t v) |
|
|
845 | { |
|
|
846 | v ^= v >> 31 ^ v >> 62; v *= 0x319642b2d24d8ec3U; |
|
|
847 | v ^= v >> 27 ^ v >> 54; v *= 0x96de1b173f119089U; |
|
|
848 | v ^= v >> 30 ^ v >> 60; |
|
|
849 | return v; |
|
|
850 | } |
|
|
851 | |
|
|
852 | ecb_function_ uintptr_t ecb_ptrmix (void *p); |
|
|
853 | ecb_function_ uintptr_t ecb_ptrmix (void *p) |
|
|
854 | { |
|
|
855 | #if ECB_PTRSIZE <= 4 |
|
|
856 | return ecb_mix32 ((uint32_t)p); |
|
|
857 | #else |
|
|
858 | return ecb_mix64 ((uint64_t)p); |
|
|
859 | #endif |
|
|
860 | } |
|
|
861 | |
|
|
862 | ecb_function_ void *ecb_ptrunmix (uintptr_t v); |
|
|
863 | ecb_function_ void *ecb_ptrunmix (uintptr_t v) |
|
|
864 | { |
|
|
865 | #if ECB_PTRSIZE <= 4 |
|
|
866 | return (void *)ecb_unmix32 (v); |
|
|
867 | #else |
|
|
868 | return (void *)ecb_unmix64 (v); |
|
|
869 | #endif |
|
|
870 | } |
|
|
871 | |
|
|
872 | #if ECB_CPP |
|
|
873 | |
|
|
874 | template<typename T> |
|
|
875 | inline uintptr_t ecb_ptrmix (T *p) |
|
|
876 | { |
|
|
877 | return ecb_ptrmix (static_cast<void *>(p)); |
|
|
878 | } |
|
|
879 | |
|
|
880 | template<typename T> |
|
|
881 | inline T *ecb_ptrunmix (uintptr_t v) |
|
|
882 | { |
|
|
883 | return static_cast<T *>(ecb_ptrunmix (v)); |
|
|
884 | } |
|
|
885 | |
|
|
886 | #endif |
|
|
887 | |
|
|
888 | /*****************************************************************************/ |
|
|
889 | /* gray code */ |
|
|
890 | |
|
|
891 | ecb_function_ uint_fast8_t ecb_gray8_encode (uint_fast8_t b) { return b ^ (b >> 1); } |
|
|
892 | ecb_function_ uint_fast16_t ecb_gray16_encode (uint_fast16_t b) { return b ^ (b >> 1); } |
|
|
893 | ecb_function_ uint_fast32_t ecb_gray32_encode (uint_fast32_t b) { return b ^ (b >> 1); } |
|
|
894 | ecb_function_ uint_fast64_t ecb_gray64_encode (uint_fast64_t b) { return b ^ (b >> 1); } |
|
|
895 | |
|
|
896 | ecb_function_ uint8_t ecb_gray8_decode (uint8_t g) |
|
|
897 | { |
|
|
898 | g = g ^ (g >> 1); |
|
|
899 | g = g ^ (g >> 2); |
|
|
900 | g = g ^ (g >> 4); |
|
|
901 | return g; |
|
|
902 | } |
|
|
903 | |
|
|
904 | ecb_function_ uint16_t ecb_gray16_decode (uint16_t g) |
|
|
905 | { |
|
|
906 | g = g ^ (g >> 1); |
|
|
907 | g = g ^ (g >> 2); |
|
|
908 | g = g ^ (g >> 4); |
|
|
909 | g = g ^ (g >> 8); |
|
|
910 | return g; |
|
|
911 | } |
|
|
912 | |
|
|
913 | ecb_function_ uint32_t ecb_gray32_decode (uint32_t g) |
|
|
914 | { |
|
|
915 | g = g ^ (g >> 1); |
|
|
916 | g = g ^ (g >> 2); |
|
|
917 | g = g ^ (g >> 4); |
|
|
918 | g = g ^ (g >> 8); |
|
|
919 | g = g ^ (g >> 16); |
|
|
920 | return g; |
|
|
921 | } |
|
|
922 | |
|
|
923 | ecb_function_ uint64_t ecb_gray64_decode (uint64_t g) |
|
|
924 | { |
|
|
925 | g = g ^ (g >> 1); |
|
|
926 | g = g ^ (g >> 2); |
|
|
927 | g = g ^ (g >> 4); |
|
|
928 | g = g ^ (g >> 8); |
|
|
929 | g = g ^ (g >> 16); |
|
|
930 | g = g ^ (g >> 32); |
|
|
931 | return g; |
|
|
932 | } |
|
|
933 | |
|
|
934 | #if ECB_CPP |
|
|
935 | |
|
|
936 | ecb_function_ uint8_t ecb_gray_encode (uint8_t b) { return ecb_gray8_encode (b); } |
|
|
937 | ecb_function_ uint16_t ecb_gray_encode (uint16_t b) { return ecb_gray16_encode (b); } |
|
|
938 | ecb_function_ uint32_t ecb_gray_encode (uint32_t b) { return ecb_gray32_encode (b); } |
|
|
939 | ecb_function_ uint64_t ecb_gray_encode (uint64_t b) { return ecb_gray64_encode (b); } |
|
|
940 | |
|
|
941 | ecb_function_ uint8_t ecb_gray_decode (uint8_t g) { return ecb_gray8_decode (g); } |
|
|
942 | ecb_function_ uint16_t ecb_gray_decode (uint16_t g) { return ecb_gray16_decode (g); } |
|
|
943 | ecb_function_ uint32_t ecb_gray_decode (uint32_t g) { return ecb_gray32_decode (g); } |
|
|
944 | ecb_function_ uint64_t ecb_gray_decode (uint64_t g) { return ecb_gray64_decode (g); } |
|
|
945 | |
|
|
946 | #endif |
|
|
947 | |
|
|
948 | /*****************************************************************************/ |
|
|
949 | /* division */ |
| 804 | |
950 | |
| 805 | #if ECB_GCC_VERSION(3,0) || ECB_C99 |
951 | #if ECB_GCC_VERSION(3,0) || ECB_C99 |
|
|
952 | /* C99 tightened the definition of %, so we can use a more efficient version */ |
| 806 | #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) |
953 | #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) |
| 807 | #else |
954 | #else |
| 808 | #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) |
955 | #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) |
| 809 | #endif |
956 | #endif |
| 810 | |
957 | |
| … | |
… | |
| 821 | } |
968 | } |
| 822 | #else |
969 | #else |
| 823 | #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div)) |
970 | #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div)) |
| 824 | #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div)) |
971 | #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div)) |
| 825 | #endif |
972 | #endif |
|
|
973 | |
|
|
974 | /*****************************************************************************/ |
|
|
975 | /* array length */ |
| 826 | |
976 | |
| 827 | #if ecb_cplusplus_does_not_suck |
977 | #if ecb_cplusplus_does_not_suck |
| 828 | /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */ |
978 | /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */ |
| 829 | template<typename T, int N> |
979 | template<typename T, int N> |
| 830 | static inline int ecb_array_length (const T (&arr)[N]) |
980 | static inline int ecb_array_length (const T (&arr)[N]) |
| … | |
… | |
| 834 | #else |
984 | #else |
| 835 | #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) |
985 | #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) |
| 836 | #endif |
986 | #endif |
| 837 | |
987 | |
| 838 | /*****************************************************************************/ |
988 | /*****************************************************************************/ |
|
|
989 | /* IEEE 754-2008 half float conversions */ |
| 839 | |
990 | |
| 840 | ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x); |
991 | ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x); |
| 841 | ecb_function_ ecb_const uint32_t |
992 | ecb_function_ ecb_const uint32_t |
| 842 | ecb_binary16_to_binary32 (uint32_t x) |
993 | ecb_binary16_to_binary32 (uint32_t x) |
| 843 | { |
994 | { |
| … | |
… | |
| 872 | ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x); |
1023 | ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x); |
| 873 | ecb_function_ ecb_const uint16_t |
1024 | ecb_function_ ecb_const uint16_t |
| 874 | ecb_binary32_to_binary16 (uint32_t x) |
1025 | ecb_binary32_to_binary16 (uint32_t x) |
| 875 | { |
1026 | { |
| 876 | unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */ |
1027 | unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */ |
| 877 | unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */ |
1028 | int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */ |
| 878 | unsigned int m = x & 0x007fffff; |
1029 | unsigned int m = x & 0x007fffff; |
| 879 | |
1030 | |
| 880 | x &= 0x7fffffff; |
1031 | x &= 0x7fffffff; |
| 881 | |
1032 | |
| 882 | /* if it's within range of binary16 normals, use fast path */ |
1033 | /* if it's within range of binary16 normals, use fast path */ |
| … | |
… | |
| 929 | |
1080 | |
| 930 | /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */ |
1081 | /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */ |
| 931 | m >>= 13; |
1082 | m >>= 13; |
| 932 | |
1083 | |
| 933 | return s | 0x7c00 | m | !m; |
1084 | return s | 0x7c00 | m | !m; |
|
|
1085 | } |
|
|
1086 | |
|
|
1087 | /*******************************************************************************/ |
|
|
1088 | /* fast integer to ascii */ |
|
|
1089 | |
|
|
1090 | /* |
|
|
1091 | * This code is pretty complicated because it is general. The idea behind it, |
|
|
1092 | * however, is pretty simple: first, the number is multiplied with a scaling |
|
|
1093 | * factor (2**bits / 10**(digits-1)) to convert the integer into a fixed-point |
|
|
1094 | * number with the first digit in the upper bits. |
|
|
1095 | * Then this digit is converted to text and masked out. The resulting number |
|
|
1096 | * is then multiplied by 10, by multiplying the fixed point representation |
|
|
1097 | * by 5 and shifting the (binary) decimal point one to the right, so a 4.28 |
|
|
1098 | * format becomes 5.27, 6.26 and so on. |
|
|
1099 | * The rest involves only advancing the pointer if we already generated a |
|
|
1100 | * non-zero digit, so leading zeroes are overwritten. |
|
|
1101 | */ |
|
|
1102 | |
|
|
1103 | /* simply return a mask with "bits" bits set */ |
|
|
1104 | #define ecb_i2a_mask(type,bits) ((((type)1) << (bits)) - 1) |
|
|
1105 | |
|
|
1106 | /* oputput a single digit. maskvalue is 10**digitidx */ |
|
|
1107 | #define ecb_i2a_digit(type,bits,digitmask,maskvalue,digitidx) \ |
|
|
1108 | if (digitmask >= maskvalue) /* constant, used to decide how many digits to generate */ \ |
|
|
1109 | { \ |
|
|
1110 | char digit = x >> (bits - digitidx); /* calculate the topmost digit */ \ |
|
|
1111 | *ptr = digit + '0'; /* output it */ \ |
|
|
1112 | nz = (digitmask == maskvalue) || nz || digit; /* first term == always output last digit */ \ |
|
|
1113 | ptr += nz; /* output digit only if non-zero digit seen */ \ |
|
|
1114 | x = (x & ecb_i2a_mask (type, bits - digitidx)) * 5; /* *10, but shift decimal point right */ \ |
|
|
1115 | } |
|
|
1116 | |
|
|
1117 | /* convert integer to fixed point format and multiply out digits, highest first */ |
|
|
1118 | /* requires magic constants: max. digits and number of bits after the decimal point */ |
|
|
1119 | #define ecb_i2a_def(suffix,ptr,v,type,bits,digitmask,lz) \ |
|
|
1120 | ecb_inline char *ecb_i2a_ ## suffix (char *ptr, uint32_t u) \ |
|
|
1121 | { \ |
|
|
1122 | char nz = lz; /* non-zero digit seen? */ \ |
|
|
1123 | /* convert to x.bits fixed-point */ \ |
|
|
1124 | type x = u * ((ecb_i2a_mask (type, bits) + digitmask) / digitmask); \ |
|
|
1125 | /* output up to 10 digits */ \ |
|
|
1126 | ecb_i2a_digit (type,bits,digitmask, 1, 0); \ |
|
|
1127 | ecb_i2a_digit (type,bits,digitmask, 10, 1); \ |
|
|
1128 | ecb_i2a_digit (type,bits,digitmask, 100, 2); \ |
|
|
1129 | ecb_i2a_digit (type,bits,digitmask, 1000, 3); \ |
|
|
1130 | ecb_i2a_digit (type,bits,digitmask, 10000, 4); \ |
|
|
1131 | ecb_i2a_digit (type,bits,digitmask, 100000, 5); \ |
|
|
1132 | ecb_i2a_digit (type,bits,digitmask, 1000000, 6); \ |
|
|
1133 | ecb_i2a_digit (type,bits,digitmask, 10000000, 7); \ |
|
|
1134 | ecb_i2a_digit (type,bits,digitmask, 100000000, 8); \ |
|
|
1135 | ecb_i2a_digit (type,bits,digitmask, 1000000000, 9); \ |
|
|
1136 | return ptr; \ |
|
|
1137 | } |
|
|
1138 | |
|
|
1139 | /* predefined versions of the above, for various digits */ |
|
|
1140 | /* ecb_i2a_xN = almost N digits, limit defined by macro */ |
|
|
1141 | /* ecb_i2a_N = up to N digits, leading zeroes suppressed */ |
|
|
1142 | /* ecb_i2a_0N = exactly N digits, including leading zeroes */ |
|
|
1143 | |
|
|
1144 | /* non-leading-zero versions, limited range */ |
|
|
1145 | #define ECB_I2A_MAX_X5 59074 /* limit for ecb_i2a_x5 */ |
|
|
1146 | #define ECB_I2A_MAX_X10 2932500665 /* limit for ecb_i2a_x10 */ |
|
|
1147 | ecb_i2a_def ( x5, ptr, v, uint32_t, 26, 10000, 0) |
|
|
1148 | ecb_i2a_def (x10, ptr, v, uint64_t, 60, 1000000000, 0) |
|
|
1149 | |
|
|
1150 | /* non-leading zero versions, all digits, 4 and 9 are optimal for 32/64 bit */ |
|
|
1151 | ecb_i2a_def ( 2, ptr, v, uint32_t, 10, 10, 0) |
|
|
1152 | ecb_i2a_def ( 3, ptr, v, uint32_t, 12, 100, 0) |
|
|
1153 | ecb_i2a_def ( 4, ptr, v, uint32_t, 26, 1000, 0) |
|
|
1154 | ecb_i2a_def ( 5, ptr, v, uint64_t, 30, 10000, 0) |
|
|
1155 | ecb_i2a_def ( 6, ptr, v, uint64_t, 36, 100000, 0) |
|
|
1156 | ecb_i2a_def ( 7, ptr, v, uint64_t, 44, 1000000, 0) |
|
|
1157 | ecb_i2a_def ( 8, ptr, v, uint64_t, 50, 10000000, 0) |
|
|
1158 | ecb_i2a_def ( 9, ptr, v, uint64_t, 56, 100000000, 0) |
|
|
1159 | |
|
|
1160 | /* leading-zero versions, all digits, 04 and 09 are optimal for 32/64 bit */ |
|
|
1161 | ecb_i2a_def (02, ptr, v, uint32_t, 10, 10, 1) |
|
|
1162 | ecb_i2a_def (03, ptr, v, uint32_t, 12, 100, 1) |
|
|
1163 | ecb_i2a_def (04, ptr, v, uint32_t, 26, 1000, 1) |
|
|
1164 | ecb_i2a_def (05, ptr, v, uint64_t, 30, 10000, 1) |
|
|
1165 | ecb_i2a_def (06, ptr, v, uint64_t, 36, 100000, 1) |
|
|
1166 | ecb_i2a_def (07, ptr, v, uint64_t, 44, 1000000, 1) |
|
|
1167 | ecb_i2a_def (08, ptr, v, uint64_t, 50, 10000000, 1) |
|
|
1168 | ecb_i2a_def (09, ptr, v, uint64_t, 56, 100000000, 1) |
|
|
1169 | |
|
|
1170 | #define ECB_I2A_I32_DIGITS 11 |
|
|
1171 | #define ECB_I2A_U32_DIGITS 10 |
|
|
1172 | #define ECB_I2A_I64_DIGITS 20 |
|
|
1173 | #define ECB_I2A_U64_DIGITS 21 |
|
|
1174 | #define ECB_I2A_MAX_DIGITS 21 |
|
|
1175 | |
|
|
1176 | ecb_inline char * |
|
|
1177 | ecb_i2a_u32 (char *ptr, uint32_t u) |
|
|
1178 | { |
|
|
1179 | #if ECB_64BIT_NATIVE |
|
|
1180 | if (ecb_expect_true (u <= ECB_I2A_MAX_X10)) |
|
|
1181 | ptr = ecb_i2a_x10 (ptr, u); |
|
|
1182 | else /* x10 almost, but not fully, covers 32 bit */ |
|
|
1183 | { |
|
|
1184 | uint32_t u1 = u % 1000000000; |
|
|
1185 | uint32_t u2 = u / 1000000000; |
|
|
1186 | |
|
|
1187 | *ptr++ = u2 + '0'; |
|
|
1188 | ptr = ecb_i2a_09 (ptr, u1); |
|
|
1189 | } |
|
|
1190 | #else |
|
|
1191 | if (ecb_expect_true (u <= ECB_I2A_MAX_X5)) |
|
|
1192 | ecb_i2a_x5 (ptr, u); |
|
|
1193 | else if (ecb_expect_true (u <= ECB_I2A_MAX_X5 * 10000)) |
|
|
1194 | { |
|
|
1195 | uint32_t u1 = u % 10000; |
|
|
1196 | uint32_t u2 = u / 10000; |
|
|
1197 | |
|
|
1198 | ptr = ecb_i2a_x5 (ptr, u2); |
|
|
1199 | ptr = ecb_i2a_04 (ptr, u1); |
|
|
1200 | } |
|
|
1201 | else |
|
|
1202 | { |
|
|
1203 | uint32_t u1 = u % 10000; |
|
|
1204 | uint32_t ua = u / 10000; |
|
|
1205 | uint32_t u2 = ua % 10000; |
|
|
1206 | uint32_t u3 = ua / 10000; |
|
|
1207 | |
|
|
1208 | ptr = ecb_i2a_2 (ptr, u3); |
|
|
1209 | ptr = ecb_i2a_04 (ptr, u2); |
|
|
1210 | ptr = ecb_i2a_04 (ptr, u1); |
|
|
1211 | } |
|
|
1212 | #endif |
|
|
1213 | |
|
|
1214 | return ptr; |
|
|
1215 | } |
|
|
1216 | |
|
|
1217 | ecb_inline char * |
|
|
1218 | ecb_i2a_i32 (char *ptr, int32_t v) |
|
|
1219 | { |
|
|
1220 | *ptr = '-'; ptr += v < 0; |
|
|
1221 | uint32_t u = v < 0 ? -(uint32_t)v : v; |
|
|
1222 | |
|
|
1223 | #if ECB_64BIT_NATIVE |
|
|
1224 | ptr = ecb_i2a_x10 (ptr, u); /* x10 fully covers 31 bit */ |
|
|
1225 | #else |
|
|
1226 | ptr = ecb_i2a_u32 (ptr, u); |
|
|
1227 | #endif |
|
|
1228 | |
|
|
1229 | return ptr; |
|
|
1230 | } |
|
|
1231 | |
|
|
1232 | ecb_inline char * |
|
|
1233 | ecb_i2a_u64 (char *ptr, uint64_t u) |
|
|
1234 | { |
|
|
1235 | #if ECB_64BIT_NATIVE |
|
|
1236 | if (ecb_expect_true (u <= ECB_I2A_MAX_X10)) |
|
|
1237 | ptr = ecb_i2a_x10 (ptr, u); |
|
|
1238 | else if (ecb_expect_false (u <= ECB_I2A_MAX_X10 * 1000000000)) |
|
|
1239 | { |
|
|
1240 | uint64_t u1 = u % 1000000000; |
|
|
1241 | uint64_t u2 = u / 1000000000; |
|
|
1242 | |
|
|
1243 | ptr = ecb_i2a_x10 (ptr, u2); |
|
|
1244 | ptr = ecb_i2a_09 (ptr, u1); |
|
|
1245 | } |
|
|
1246 | else |
|
|
1247 | { |
|
|
1248 | uint64_t u1 = u % 1000000000; |
|
|
1249 | uint64_t ua = u / 1000000000; |
|
|
1250 | uint64_t u2 = ua % 1000000000; |
|
|
1251 | uint64_t u3 = ua / 1000000000; |
|
|
1252 | |
|
|
1253 | ptr = ecb_i2a_2 (ptr, u3); |
|
|
1254 | ptr = ecb_i2a_09 (ptr, u2); |
|
|
1255 | ptr = ecb_i2a_09 (ptr, u1); |
|
|
1256 | } |
|
|
1257 | #else |
|
|
1258 | if (ecb_expect_true (u <= ECB_I2A_MAX_X5)) |
|
|
1259 | ptr = ecb_i2a_x5 (ptr, u); |
|
|
1260 | else |
|
|
1261 | { |
|
|
1262 | uint64_t u1 = u % 10000; |
|
|
1263 | uint64_t u2 = u / 10000; |
|
|
1264 | |
|
|
1265 | ptr = ecb_i2a_u64 (ptr, u2); |
|
|
1266 | ptr = ecb_i2a_04 (ptr, u1); |
|
|
1267 | } |
|
|
1268 | #endif |
|
|
1269 | |
|
|
1270 | return ptr; |
|
|
1271 | } |
|
|
1272 | |
|
|
1273 | ecb_inline char * |
|
|
1274 | ecb_i2a_i64 (char *ptr, int64_t v) |
|
|
1275 | { |
|
|
1276 | *ptr = '-'; ptr += v < 0; |
|
|
1277 | uint64_t u = v < 0 ? -(uint64_t)v : v; |
|
|
1278 | |
|
|
1279 | #if ECB_64BIT_NATIVE |
|
|
1280 | if (ecb_expect_true (u <= ECB_I2A_MAX_X10)) |
|
|
1281 | ptr = ecb_i2a_x10 (ptr, u); |
|
|
1282 | else if (ecb_expect_false (u <= ECB_I2A_MAX_X10 * 1000000000)) |
|
|
1283 | { |
|
|
1284 | uint64_t u1 = u % 1000000000; |
|
|
1285 | uint64_t u2 = u / 1000000000; |
|
|
1286 | |
|
|
1287 | ptr = ecb_i2a_x10 (ptr, u2); |
|
|
1288 | ptr = ecb_i2a_09 (ptr, u1); |
|
|
1289 | } |
|
|
1290 | else |
|
|
1291 | { |
|
|
1292 | uint64_t u1 = u % 1000000000; |
|
|
1293 | uint64_t ua = u / 1000000000; |
|
|
1294 | uint64_t u2 = ua % 1000000000; |
|
|
1295 | uint64_t u3 = ua / 1000000000; |
|
|
1296 | |
|
|
1297 | /* 2**31 is 19 digits, so the top is exactly one digit */ |
|
|
1298 | *ptr++ = u3 + '0'; |
|
|
1299 | ptr = ecb_i2a_09 (ptr, u2); |
|
|
1300 | ptr = ecb_i2a_09 (ptr, u1); |
|
|
1301 | } |
|
|
1302 | #else |
|
|
1303 | ptr = ecb_i2a_u64 (ptr, u); |
|
|
1304 | #endif |
|
|
1305 | |
|
|
1306 | return ptr; |
| 934 | } |
1307 | } |
| 935 | |
1308 | |
| 936 | /*******************************************************************************/ |
1309 | /*******************************************************************************/ |
| 937 | /* floating point stuff, can be disabled by defining ECB_NO_LIBM */ |
1310 | /* floating point stuff, can be disabled by defining ECB_NO_LIBM */ |
| 938 | |
1311 | |
