… | |
… | |
532 | |
532 | |
533 | #ifndef ECB_H |
533 | #ifndef ECB_H |
534 | #define ECB_H |
534 | #define ECB_H |
535 | |
535 | |
536 | /* 16 bits major, 16 bits minor */ |
536 | /* 16 bits major, 16 bits minor */ |
537 | #define ECB_VERSION 0x00010004 |
537 | #define ECB_VERSION 0x00010005 |
538 | |
538 | |
539 | #ifdef _WIN32 |
539 | #ifdef _WIN32 |
540 | typedef signed char int8_t; |
540 | typedef signed char int8_t; |
541 | typedef unsigned char uint8_t; |
541 | typedef unsigned char uint8_t; |
542 | typedef signed short int16_t; |
542 | typedef signed short int16_t; |
… | |
… | |
559 | typedef uint32_t uintptr_t; |
559 | typedef uint32_t uintptr_t; |
560 | typedef int32_t intptr_t; |
560 | typedef int32_t intptr_t; |
561 | #endif |
561 | #endif |
562 | #else |
562 | #else |
563 | #include <inttypes.h> |
563 | #include <inttypes.h> |
564 | #if UINTMAX_MAX > 0xffffffffU |
564 | #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU |
565 | #define ECB_PTRSIZE 8 |
565 | #define ECB_PTRSIZE 8 |
566 | #else |
566 | #else |
567 | #define ECB_PTRSIZE 4 |
567 | #define ECB_PTRSIZE 4 |
568 | #endif |
568 | #endif |
569 | #endif |
569 | #endif |
… | |
… | |
645 | #endif |
645 | #endif |
646 | |
646 | |
647 | /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */ |
647 | /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */ |
648 | #if __xlC__ && ECB_CPP |
648 | #if __xlC__ && ECB_CPP |
649 | #include <builtins.h> |
649 | #include <builtins.h> |
|
|
650 | #endif |
|
|
651 | |
|
|
652 | #if 1400 <= _MSC_VER |
|
|
653 | #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */ |
650 | #endif |
654 | #endif |
651 | |
655 | |
652 | #ifndef ECB_MEMORY_FENCE |
656 | #ifndef ECB_MEMORY_FENCE |
653 | #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 |
657 | #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 |
654 | #if __i386 || __i386__ |
658 | #if __i386 || __i386__ |
… | |
… | |
659 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") |
663 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") |
660 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") |
664 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") |
661 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") |
665 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") |
662 | #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ |
666 | #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ |
663 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") |
667 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") |
|
|
668 | #elif defined __ARM_ARCH_2__ \ |
|
|
669 | || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \ |
|
|
670 | || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \ |
|
|
671 | || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \ |
|
|
672 | || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \ |
|
|
673 | || defined __ARM_ARCH_5TEJ__ |
|
|
674 | /* should not need any, unless running old code on newer cpu - arm doesn't support that */ |
664 | #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \ |
675 | #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \ |
665 | || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ |
676 | || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \ |
|
|
677 | || defined __ARM_ARCH_6T2__ |
666 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") |
678 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") |
667 | #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ |
679 | #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ |
668 | || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ |
680 | || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__ |
669 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") |
681 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") |
670 | #elif __aarch64__ |
682 | #elif __aarch64__ |
671 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory") |
683 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory") |
672 | #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8) |
684 | #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8) |
673 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory") |
685 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory") |
… | |
… | |
915 | #else |
927 | #else |
916 | ecb_function_ ecb_const int ecb_ctz32 (uint32_t x); |
928 | ecb_function_ ecb_const int ecb_ctz32 (uint32_t x); |
917 | ecb_function_ ecb_const int |
929 | ecb_function_ ecb_const int |
918 | ecb_ctz32 (uint32_t x) |
930 | ecb_ctz32 (uint32_t x) |
919 | { |
931 | { |
|
|
932 | #if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM) |
|
|
933 | unsigned long r; |
|
|
934 | _BitScanForward (&r, x); |
|
|
935 | return (int)r; |
|
|
936 | #else |
920 | int r = 0; |
937 | int r = 0; |
921 | |
938 | |
922 | x &= ~x + 1; /* this isolates the lowest bit */ |
939 | x &= ~x + 1; /* this isolates the lowest bit */ |
923 | |
940 | |
924 | #if ECB_branchless_on_i386 |
941 | #if ECB_branchless_on_i386 |
… | |
… | |
934 | if (x & 0xff00ff00) r += 8; |
951 | if (x & 0xff00ff00) r += 8; |
935 | if (x & 0xffff0000) r += 16; |
952 | if (x & 0xffff0000) r += 16; |
936 | #endif |
953 | #endif |
937 | |
954 | |
938 | return r; |
955 | return r; |
|
|
956 | #endif |
939 | } |
957 | } |
940 | |
958 | |
941 | ecb_function_ ecb_const int ecb_ctz64 (uint64_t x); |
959 | ecb_function_ ecb_const int ecb_ctz64 (uint64_t x); |
942 | ecb_function_ ecb_const int |
960 | ecb_function_ ecb_const int |
943 | ecb_ctz64 (uint64_t x) |
961 | ecb_ctz64 (uint64_t x) |
944 | { |
962 | { |
|
|
963 | #if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM) |
|
|
964 | unsigned long r; |
|
|
965 | _BitScanForward64 (&r, x); |
|
|
966 | return (int)r; |
|
|
967 | #else |
945 | int shift = x & 0xffffffffU ? 0 : 32; |
968 | int shift = x & 0xffffffff ? 0 : 32; |
946 | return ecb_ctz32 (x >> shift) + shift; |
969 | return ecb_ctz32 (x >> shift) + shift; |
|
|
970 | #endif |
947 | } |
971 | } |
948 | |
972 | |
949 | ecb_function_ ecb_const int ecb_popcount32 (uint32_t x); |
973 | ecb_function_ ecb_const int ecb_popcount32 (uint32_t x); |
950 | ecb_function_ ecb_const int |
974 | ecb_function_ ecb_const int |
951 | ecb_popcount32 (uint32_t x) |
975 | ecb_popcount32 (uint32_t x) |
… | |
… | |
959 | } |
983 | } |
960 | |
984 | |
961 | ecb_function_ ecb_const int ecb_ld32 (uint32_t x); |
985 | ecb_function_ ecb_const int ecb_ld32 (uint32_t x); |
962 | ecb_function_ ecb_const int ecb_ld32 (uint32_t x) |
986 | ecb_function_ ecb_const int ecb_ld32 (uint32_t x) |
963 | { |
987 | { |
|
|
988 | #if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM) |
|
|
989 | unsigned long r; |
|
|
990 | _BitScanReverse (&r, x); |
|
|
991 | return (int)r; |
|
|
992 | #else |
964 | int r = 0; |
993 | int r = 0; |
965 | |
994 | |
966 | if (x >> 16) { x >>= 16; r += 16; } |
995 | if (x >> 16) { x >>= 16; r += 16; } |
967 | if (x >> 8) { x >>= 8; r += 8; } |
996 | if (x >> 8) { x >>= 8; r += 8; } |
968 | if (x >> 4) { x >>= 4; r += 4; } |
997 | if (x >> 4) { x >>= 4; r += 4; } |
969 | if (x >> 2) { x >>= 2; r += 2; } |
998 | if (x >> 2) { x >>= 2; r += 2; } |
970 | if (x >> 1) { r += 1; } |
999 | if (x >> 1) { r += 1; } |
971 | |
1000 | |
972 | return r; |
1001 | return r; |
|
|
1002 | #endif |
973 | } |
1003 | } |
974 | |
1004 | |
975 | ecb_function_ ecb_const int ecb_ld64 (uint64_t x); |
1005 | ecb_function_ ecb_const int ecb_ld64 (uint64_t x); |
976 | ecb_function_ ecb_const int ecb_ld64 (uint64_t x) |
1006 | ecb_function_ ecb_const int ecb_ld64 (uint64_t x) |
977 | { |
1007 | { |
|
|
1008 | #if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM) |
|
|
1009 | unsigned long r; |
|
|
1010 | _BitScanReverse64 (&r, x); |
|
|
1011 | return (int)r; |
|
|
1012 | #else |
978 | int r = 0; |
1013 | int r = 0; |
979 | |
1014 | |
980 | if (x >> 32) { x >>= 32; r += 32; } |
1015 | if (x >> 32) { x >>= 32; r += 32; } |
981 | |
1016 | |
982 | return r + ecb_ld32 (x); |
1017 | return r + ecb_ld32 (x); |
|
|
1018 | #endif |
983 | } |
1019 | } |
984 | #endif |
1020 | #endif |
985 | |
1021 | |
986 | ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x); |
1022 | ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x); |
987 | ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); } |
1023 | ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); } |
… | |
… | |
1090 | #endif |
1126 | #endif |
1091 | |
1127 | |
1092 | /* try to tell the compiler that some condition is definitely true */ |
1128 | /* try to tell the compiler that some condition is definitely true */ |
1093 | #define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0 |
1129 | #define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0 |
1094 | |
1130 | |
1095 | ecb_inline ecb_const unsigned char ecb_byteorder_helper (void); |
1131 | ecb_inline ecb_const uint32_t ecb_byteorder_helper (void); |
1096 | ecb_inline ecb_const unsigned char |
1132 | ecb_inline ecb_const uint32_t |
1097 | ecb_byteorder_helper (void) |
1133 | ecb_byteorder_helper (void) |
1098 | { |
1134 | { |
1099 | /* the union code still generates code under pressure in gcc, */ |
1135 | /* the union code still generates code under pressure in gcc, */ |
1100 | /* but less than using pointers, and always seems to */ |
1136 | /* but less than using pointers, and always seems to */ |
1101 | /* successfully return a constant. */ |
1137 | /* successfully return a constant. */ |
1102 | /* the reason why we have this horrible preprocessor mess */ |
1138 | /* the reason why we have this horrible preprocessor mess */ |
1103 | /* is to avoid it in all cases, at least on common architectures */ |
1139 | /* is to avoid it in all cases, at least on common architectures */ |
1104 | /* or when using a recent enough gcc version (>= 4.6) */ |
1140 | /* or when using a recent enough gcc version (>= 4.6) */ |
1105 | #if ((__i386 || __i386__) && !__VOS__) || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64 |
|
|
1106 | return 0x44; |
|
|
1107 | #elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ |
1141 | #if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \ |
|
|
1142 | || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__) |
|
|
1143 | #define ECB_LITTLE_ENDIAN 1 |
1108 | return 0x44; |
1144 | return 0x44332211; |
1109 | #elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ |
1145 | #elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \ |
|
|
1146 | || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__) |
|
|
1147 | #define ECB_BIG_ENDIAN 1 |
1110 | return 0x11; |
1148 | return 0x11223344; |
1111 | #else |
1149 | #else |
1112 | union |
1150 | union |
1113 | { |
1151 | { |
|
|
1152 | uint8_t c[4]; |
1114 | uint32_t i; |
1153 | uint32_t u; |
1115 | uint8_t c; |
|
|
1116 | } u = { 0x11223344 }; |
1154 | } u = { 0x11, 0x22, 0x33, 0x44 }; |
1117 | return u.c; |
1155 | return u.u; |
1118 | #endif |
1156 | #endif |
1119 | } |
1157 | } |
1120 | |
1158 | |
1121 | ecb_inline ecb_const ecb_bool ecb_big_endian (void); |
1159 | ecb_inline ecb_const ecb_bool ecb_big_endian (void); |
1122 | ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } |
1160 | ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; } |
1123 | ecb_inline ecb_const ecb_bool ecb_little_endian (void); |
1161 | ecb_inline ecb_const ecb_bool ecb_little_endian (void); |
1124 | ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; } |
1162 | ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; } |
1125 | |
1163 | |
1126 | #if ECB_GCC_VERSION(3,0) || ECB_C99 |
1164 | #if ECB_GCC_VERSION(3,0) || ECB_C99 |
1127 | #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) |
1165 | #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) |
1128 | #else |
1166 | #else |
1129 | #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) |
1167 | #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) |
… | |
… | |
1153 | return N; |
1191 | return N; |
1154 | } |
1192 | } |
1155 | #else |
1193 | #else |
1156 | #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) |
1194 | #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) |
1157 | #endif |
1195 | #endif |
|
|
1196 | |
|
|
1197 | ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x); |
|
|
1198 | ecb_function_ ecb_const uint32_t |
|
|
1199 | ecb_binary16_to_binary32 (uint32_t x) |
|
|
1200 | { |
|
|
1201 | unsigned int s = (x & 0x8000) << (31 - 15); |
|
|
1202 | int e = (x >> 10) & 0x001f; |
|
|
1203 | unsigned int m = x & 0x03ff; |
|
|
1204 | |
|
|
1205 | if (ecb_expect_false (e == 31)) |
|
|
1206 | /* infinity or NaN */ |
|
|
1207 | e = 255 - (127 - 15); |
|
|
1208 | else if (ecb_expect_false (!e)) |
|
|
1209 | { |
|
|
1210 | if (ecb_expect_true (!m)) |
|
|
1211 | /* zero, handled by code below by forcing e to 0 */ |
|
|
1212 | e = 0 - (127 - 15); |
|
|
1213 | else |
|
|
1214 | { |
|
|
1215 | /* subnormal, renormalise */ |
|
|
1216 | unsigned int s = 10 - ecb_ld32 (m); |
|
|
1217 | |
|
|
1218 | m = (m << s) & 0x3ff; /* mask implicit bit */ |
|
|
1219 | e -= s - 1; |
|
|
1220 | } |
|
|
1221 | } |
|
|
1222 | |
|
|
1223 | /* e and m now are normalised, or zero, (or inf or nan) */ |
|
|
1224 | e += 127 - 15; |
|
|
1225 | |
|
|
1226 | return s | (e << 23) | (m << (23 - 10)); |
|
|
1227 | } |
|
|
1228 | |
|
|
1229 | ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x); |
|
|
1230 | ecb_function_ ecb_const uint16_t |
|
|
1231 | ecb_binary32_to_binary16 (uint32_t x) |
|
|
1232 | { |
|
|
1233 | unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */ |
|
|
1234 | unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */ |
|
|
1235 | unsigned int m = x & 0x007fffff; |
|
|
1236 | |
|
|
1237 | x &= 0x7fffffff; |
|
|
1238 | |
|
|
1239 | /* if it's within range of binary16 normals, use fast path */ |
|
|
1240 | if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff)) |
|
|
1241 | { |
|
|
1242 | /* mantissa round-to-even */ |
|
|
1243 | m += 0x00000fff + ((m >> (23 - 10)) & 1); |
|
|
1244 | |
|
|
1245 | /* handle overflow */ |
|
|
1246 | if (ecb_expect_false (m >= 0x00800000)) |
|
|
1247 | { |
|
|
1248 | m >>= 1; |
|
|
1249 | e += 1; |
|
|
1250 | } |
|
|
1251 | |
|
|
1252 | return s | (e << 10) | (m >> (23 - 10)); |
|
|
1253 | } |
|
|
1254 | |
|
|
1255 | /* handle large numbers and infinity */ |
|
|
1256 | if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000)) |
|
|
1257 | return s | 0x7c00; |
|
|
1258 | |
|
|
1259 | /* handle zero, subnormals and small numbers */ |
|
|
1260 | if (ecb_expect_true (x < 0x38800000)) |
|
|
1261 | { |
|
|
1262 | /* zero */ |
|
|
1263 | if (ecb_expect_true (!x)) |
|
|
1264 | return s; |
|
|
1265 | |
|
|
1266 | /* handle subnormals */ |
|
|
1267 | |
|
|
1268 | /* too small, will be zero */ |
|
|
1269 | if (e < (14 - 24)) /* might not be sharp, but is good enough */ |
|
|
1270 | return s; |
|
|
1271 | |
|
|
1272 | m |= 0x00800000; /* make implicit bit explicit */ |
|
|
1273 | |
|
|
1274 | /* very tricky - we need to round to the nearest e (+10) bit value */ |
|
|
1275 | { |
|
|
1276 | unsigned int bits = 14 - e; |
|
|
1277 | unsigned int half = (1 << (bits - 1)) - 1; |
|
|
1278 | unsigned int even = (m >> bits) & 1; |
|
|
1279 | |
|
|
1280 | /* if this overflows, we will end up with a normalised number */ |
|
|
1281 | m = (m + half + even) >> bits; |
|
|
1282 | } |
|
|
1283 | |
|
|
1284 | return s | m; |
|
|
1285 | } |
|
|
1286 | |
|
|
1287 | /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */ |
|
|
1288 | m >>= 13; |
|
|
1289 | |
|
|
1290 | return s | 0x7c00 | m | !m; |
|
|
1291 | } |
1158 | |
1292 | |
1159 | /*******************************************************************************/ |
1293 | /*******************************************************************************/ |
1160 | /* floating point stuff, can be disabled by defining ECB_NO_LIBM */ |
1294 | /* floating point stuff, can be disabled by defining ECB_NO_LIBM */ |
1161 | |
1295 | |
1162 | /* basically, everything uses "ieee pure-endian" floating point numbers */ |
1296 | /* basically, everything uses "ieee pure-endian" floating point numbers */ |
… | |
… | |
1205 | #else |
1339 | #else |
1206 | #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e)) |
1340 | #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e)) |
1207 | #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e)) |
1341 | #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e)) |
1208 | #endif |
1342 | #endif |
1209 | |
1343 | |
1210 | /* converts an ieee half/binary16 to a float */ |
|
|
1211 | ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x); |
|
|
1212 | ecb_function_ ecb_const float |
|
|
1213 | ecb_binary16_to_float (uint16_t x) |
|
|
1214 | { |
|
|
1215 | int e = (x >> 10) & 0x1f; |
|
|
1216 | int m = x & 0x3ff; |
|
|
1217 | float r; |
|
|
1218 | |
|
|
1219 | if (!e ) r = ecb_ldexpf (m , -24); |
|
|
1220 | else if (e != 31) r = ecb_ldexpf (m + 0x400, e - 25); |
|
|
1221 | else if (m ) r = ECB_NAN; |
|
|
1222 | else r = ECB_INFINITY; |
|
|
1223 | |
|
|
1224 | return x & 0x8000 ? -r : r; |
|
|
1225 | } |
|
|
1226 | |
|
|
1227 | /* convert a float to ieee single/binary32 */ |
1344 | /* convert a float to ieee single/binary32 */ |
1228 | ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x); |
1345 | ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x); |
1229 | ecb_function_ ecb_const uint32_t |
1346 | ecb_function_ ecb_const uint32_t |
1230 | ecb_float_to_binary32 (float x) |
1347 | ecb_float_to_binary32 (float x) |
1231 | { |
1348 | { |
… | |
… | |
1360 | |
1477 | |
1361 | r = neg ? -r : r; |
1478 | r = neg ? -r : r; |
1362 | #endif |
1479 | #endif |
1363 | |
1480 | |
1364 | return r; |
1481 | return r; |
|
|
1482 | } |
|
|
1483 | |
|
|
1484 | /* convert a float to ieee half/binary16 */ |
|
|
1485 | ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x); |
|
|
1486 | ecb_function_ ecb_const uint16_t |
|
|
1487 | ecb_float_to_binary16 (float x) |
|
|
1488 | { |
|
|
1489 | return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x)); |
|
|
1490 | } |
|
|
1491 | |
|
|
1492 | /* convert an ieee half/binary16 to float */ |
|
|
1493 | ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x); |
|
|
1494 | ecb_function_ ecb_const float |
|
|
1495 | ecb_binary16_to_float (uint16_t x) |
|
|
1496 | { |
|
|
1497 | return ecb_binary32_to_float (ecb_binary16_to_binary32 (x)); |
1365 | } |
1498 | } |
1366 | |
1499 | |
1367 | #endif |
1500 | #endif |
1368 | |
1501 | |
1369 | #endif |
1502 | #endif |