… | |
… | |
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 0x00010004 |
45 | #define ECB_VERSION 0x00010005 |
46 | |
46 | |
47 | #ifdef _WIN32 |
47 | #ifdef _WIN32 |
48 | typedef signed char int8_t; |
48 | typedef signed char int8_t; |
49 | typedef unsigned char uint8_t; |
49 | typedef unsigned char uint8_t; |
50 | typedef signed short int16_t; |
50 | typedef signed short int16_t; |
… | |
… | |
67 | typedef uint32_t uintptr_t; |
67 | typedef uint32_t uintptr_t; |
68 | typedef int32_t intptr_t; |
68 | typedef int32_t intptr_t; |
69 | #endif |
69 | #endif |
70 | #else |
70 | #else |
71 | #include <inttypes.h> |
71 | #include <inttypes.h> |
72 | #if UINTMAX_MAX > 0xffffffffU |
72 | #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU |
73 | #define ECB_PTRSIZE 8 |
73 | #define ECB_PTRSIZE 8 |
74 | #else |
74 | #else |
75 | #define ECB_PTRSIZE 4 |
75 | #define ECB_PTRSIZE 4 |
76 | #endif |
76 | #endif |
77 | #endif |
77 | #endif |
78 | |
78 | |
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79 | #define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__) |
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80 | #define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64) |
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81 | |
79 | /* work around x32 idiocy by defining proper macros */ |
82 | /* work around x32 idiocy by defining proper macros */ |
80 | #if __amd64 || __x86_64 || _M_AMD64 || _M_X64 |
83 | #if ECB_GCC_AMD64 || ECB_MSVC_AMD64 |
81 | #if _ILP32 |
84 | #if _ILP32 |
82 | #define ECB_AMD64_X32 1 |
85 | #define ECB_AMD64_X32 1 |
83 | #else |
86 | #else |
84 | #define ECB_AMD64 1 |
87 | #define ECB_AMD64 1 |
85 | #endif |
88 | #endif |
… | |
… | |
147 | |
150 | |
148 | #if ECB_NO_SMP |
151 | #if ECB_NO_SMP |
149 | #define ECB_MEMORY_FENCE do { } while (0) |
152 | #define ECB_MEMORY_FENCE do { } while (0) |
150 | #endif |
153 | #endif |
151 | |
154 | |
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155 | /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */ |
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156 | #if __xlC__ && ECB_CPP |
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157 | #include <builtins.h> |
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158 | #endif |
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159 | |
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160 | #if 1400 <= _MSC_VER |
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161 | #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */ |
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|
162 | #endif |
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163 | |
152 | #ifndef ECB_MEMORY_FENCE |
164 | #ifndef ECB_MEMORY_FENCE |
153 | #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 |
165 | #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 |
154 | #if __i386 || __i386__ |
166 | #if __i386 || __i386__ |
155 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") |
167 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") |
156 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") |
168 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") |
157 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") |
169 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") |
158 | #elif __amd64 || __amd64__ || __x86_64 || __x86_64__ |
170 | #elif ECB_GCC_AMD64 |
159 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") |
171 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") |
160 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") |
172 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") |
161 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") |
173 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") |
162 | #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ |
174 | #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ |
163 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") |
175 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") |
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176 | #elif defined __ARM_ARCH_2__ \ |
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|
177 | || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \ |
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|
178 | || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \ |
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179 | || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \ |
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180 | || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \ |
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181 | || defined __ARM_ARCH_5TEJ__ |
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|
182 | /* should not need any, unless running old code on newer cpu - arm doesn't support that */ |
164 | #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \ |
183 | #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \ |
165 | || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ |
184 | || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \ |
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185 | || defined __ARM_ARCH_6T2__ |
166 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") |
186 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") |
167 | #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ |
187 | #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ |
168 | || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ |
188 | || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__ |
169 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") |
189 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") |
170 | #elif __aarch64__ |
190 | #elif __aarch64__ |
171 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory") |
191 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory") |
172 | #elif (__sparc || __sparc__) && !__sparcv8 |
192 | #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8) |
173 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory") |
193 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory") |
174 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") |
194 | #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory") |
175 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") |
195 | #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore") |
176 | #elif defined __s390__ || defined __s390x__ |
196 | #elif defined __s390__ || defined __s390x__ |
177 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") |
197 | #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory") |
… | |
… | |
349 | #define ecb_deprecated __declspec (deprecated) |
369 | #define ecb_deprecated __declspec (deprecated) |
350 | #else |
370 | #else |
351 | #define ecb_deprecated ecb_attribute ((__deprecated__)) |
371 | #define ecb_deprecated ecb_attribute ((__deprecated__)) |
352 | #endif |
372 | #endif |
353 | |
373 | |
354 | #if __MSC_VER >= 1500 |
374 | #if _MSC_VER >= 1500 |
355 | #define ecb_deprecated_message(msg) __declspec (deprecated (msg)) |
375 | #define ecb_deprecated_message(msg) __declspec (deprecated (msg)) |
356 | #elif ECB_GCC_VERSION(4,5) |
376 | #elif ECB_GCC_VERSION(4,5) |
357 | #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg)) |
377 | #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg)) |
358 | #else |
378 | #else |
359 | #define ecb_deprecated_message(msg) ecb_deprecated |
379 | #define ecb_deprecated_message(msg) ecb_deprecated |
… | |
… | |
367 | |
387 | |
368 | #define ecb_unused ecb_attribute ((__unused__)) |
388 | #define ecb_unused ecb_attribute ((__unused__)) |
369 | #define ecb_const ecb_attribute ((__const__)) |
389 | #define ecb_const ecb_attribute ((__const__)) |
370 | #define ecb_pure ecb_attribute ((__pure__)) |
390 | #define ecb_pure ecb_attribute ((__pure__)) |
371 | |
391 | |
372 | /* TODO http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx __declspec(noreturn) */ |
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|
373 | #if ECB_C11 || __IBMC_NORETURN |
392 | #if ECB_C11 || __IBMC_NORETURN |
374 | /* http://pic.dhe.ibm.com/infocenter/compbg/v121v141/topic/com.ibm.xlcpp121.bg.doc/language_ref/noreturn.html */ |
393 | /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */ |
375 | #define ecb_noreturn _Noreturn |
394 | #define ecb_noreturn _Noreturn |
376 | #elif ECB_CPP11 |
395 | #elif ECB_CPP11 |
377 | #define ecb_noreturn [[noreturn]] |
396 | #define ecb_noreturn [[noreturn]] |
378 | #elif _MSC_VER >= 1200 |
397 | #elif _MSC_VER >= 1200 |
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|
398 | /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */ |
379 | #define ecb_noreturn __declspec (noreturn) |
399 | #define ecb_noreturn __declspec (noreturn) |
380 | #else |
400 | #else |
381 | #define ecb_noreturn ecb_attribute ((__noreturn__)) |
401 | #define ecb_noreturn ecb_attribute ((__noreturn__)) |
382 | #endif |
402 | #endif |
383 | |
403 | |
… | |
… | |
415 | #else |
435 | #else |
416 | ecb_function_ ecb_const int ecb_ctz32 (uint32_t x); |
436 | ecb_function_ ecb_const int ecb_ctz32 (uint32_t x); |
417 | ecb_function_ ecb_const int |
437 | ecb_function_ ecb_const int |
418 | ecb_ctz32 (uint32_t x) |
438 | ecb_ctz32 (uint32_t x) |
419 | { |
439 | { |
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440 | #if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM) |
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441 | unsigned long r; |
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442 | _BitScanForward (&r, x); |
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443 | return (int)r; |
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444 | #else |
420 | int r = 0; |
445 | int r = 0; |
421 | |
446 | |
422 | x &= ~x + 1; /* this isolates the lowest bit */ |
447 | x &= ~x + 1; /* this isolates the lowest bit */ |
423 | |
448 | |
424 | #if ECB_branchless_on_i386 |
449 | #if ECB_branchless_on_i386 |
… | |
… | |
434 | if (x & 0xff00ff00) r += 8; |
459 | if (x & 0xff00ff00) r += 8; |
435 | if (x & 0xffff0000) r += 16; |
460 | if (x & 0xffff0000) r += 16; |
436 | #endif |
461 | #endif |
437 | |
462 | |
438 | return r; |
463 | return r; |
|
|
464 | #endif |
439 | } |
465 | } |
440 | |
466 | |
441 | ecb_function_ ecb_const int ecb_ctz64 (uint64_t x); |
467 | ecb_function_ ecb_const int ecb_ctz64 (uint64_t x); |
442 | ecb_function_ ecb_const int |
468 | ecb_function_ ecb_const int |
443 | ecb_ctz64 (uint64_t x) |
469 | ecb_ctz64 (uint64_t x) |
444 | { |
470 | { |
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471 | #if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM) |
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472 | unsigned long r; |
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473 | _BitScanForward64 (&r, x); |
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474 | return (int)r; |
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475 | #else |
445 | int shift = x & 0xffffffffU ? 0 : 32; |
476 | int shift = x & 0xffffffff ? 0 : 32; |
446 | return ecb_ctz32 (x >> shift) + shift; |
477 | return ecb_ctz32 (x >> shift) + shift; |
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478 | #endif |
447 | } |
479 | } |
448 | |
480 | |
449 | ecb_function_ ecb_const int ecb_popcount32 (uint32_t x); |
481 | ecb_function_ ecb_const int ecb_popcount32 (uint32_t x); |
450 | ecb_function_ ecb_const int |
482 | ecb_function_ ecb_const int |
451 | ecb_popcount32 (uint32_t x) |
483 | ecb_popcount32 (uint32_t x) |
… | |
… | |
459 | } |
491 | } |
460 | |
492 | |
461 | ecb_function_ ecb_const int ecb_ld32 (uint32_t x); |
493 | ecb_function_ ecb_const int ecb_ld32 (uint32_t x); |
462 | ecb_function_ ecb_const int ecb_ld32 (uint32_t x) |
494 | ecb_function_ ecb_const int ecb_ld32 (uint32_t x) |
463 | { |
495 | { |
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496 | #if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM) |
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497 | unsigned long r; |
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498 | _BitScanReverse (&r, x); |
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499 | return (int)r; |
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500 | #else |
464 | int r = 0; |
501 | int r = 0; |
465 | |
502 | |
466 | if (x >> 16) { x >>= 16; r += 16; } |
503 | if (x >> 16) { x >>= 16; r += 16; } |
467 | if (x >> 8) { x >>= 8; r += 8; } |
504 | if (x >> 8) { x >>= 8; r += 8; } |
468 | if (x >> 4) { x >>= 4; r += 4; } |
505 | if (x >> 4) { x >>= 4; r += 4; } |
469 | if (x >> 2) { x >>= 2; r += 2; } |
506 | if (x >> 2) { x >>= 2; r += 2; } |
470 | if (x >> 1) { r += 1; } |
507 | if (x >> 1) { r += 1; } |
471 | |
508 | |
472 | return r; |
509 | return r; |
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510 | #endif |
473 | } |
511 | } |
474 | |
512 | |
475 | ecb_function_ ecb_const int ecb_ld64 (uint64_t x); |
513 | ecb_function_ ecb_const int ecb_ld64 (uint64_t x); |
476 | ecb_function_ ecb_const int ecb_ld64 (uint64_t x) |
514 | ecb_function_ ecb_const int ecb_ld64 (uint64_t x) |
477 | { |
515 | { |
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516 | #if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM) |
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517 | unsigned long r; |
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518 | _BitScanReverse64 (&r, x); |
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519 | return (int)r; |
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520 | #else |
478 | int r = 0; |
521 | int r = 0; |
479 | |
522 | |
480 | if (x >> 32) { x >>= 32; r += 32; } |
523 | if (x >> 32) { x >>= 32; r += 32; } |
481 | |
524 | |
482 | return r + ecb_ld32 (x); |
525 | return r + ecb_ld32 (x); |
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|
526 | #endif |
483 | } |
527 | } |
484 | #endif |
528 | #endif |
485 | |
529 | |
486 | ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x); |
530 | ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x); |
487 | ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); } |
531 | ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); } |
… | |
… | |
544 | ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); } |
588 | ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); } |
545 | ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); } |
589 | ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); } |
546 | ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); } |
590 | ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); } |
547 | |
591 | |
548 | #if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64)) |
592 | #if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64)) |
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593 | #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16) |
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594 | #define ecb_bswap16(x) __builtin_bswap16 (x) |
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595 | #else |
549 | #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) |
596 | #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) |
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|
597 | #endif |
550 | #define ecb_bswap32(x) __builtin_bswap32 (x) |
598 | #define ecb_bswap32(x) __builtin_bswap32 (x) |
551 | #define ecb_bswap64(x) __builtin_bswap64 (x) |
599 | #define ecb_bswap64(x) __builtin_bswap64 (x) |
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|
600 | #elif _MSC_VER |
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|
601 | #include <stdlib.h> |
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|
602 | #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x))) |
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603 | #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x))) |
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|
604 | #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x))) |
552 | #else |
605 | #else |
553 | ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x); |
606 | ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x); |
554 | ecb_function_ ecb_const uint16_t |
607 | ecb_function_ ecb_const uint16_t |
555 | ecb_bswap16 (uint16_t x) |
608 | ecb_bswap16 (uint16_t x) |
556 | { |
609 | { |
… | |
… | |
581 | #endif |
634 | #endif |
582 | |
635 | |
583 | /* try to tell the compiler that some condition is definitely true */ |
636 | /* try to tell the compiler that some condition is definitely true */ |
584 | #define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0 |
637 | #define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0 |
585 | |
638 | |
586 | ecb_inline ecb_const unsigned char ecb_byteorder_helper (void); |
639 | ecb_inline ecb_const uint32_t ecb_byteorder_helper (void); |
587 | ecb_inline ecb_const unsigned char |
640 | ecb_inline ecb_const uint32_t |
588 | ecb_byteorder_helper (void) |
641 | ecb_byteorder_helper (void) |
589 | { |
642 | { |
590 | /* the union code still generates code under pressure in gcc, */ |
643 | /* the union code still generates code under pressure in gcc, */ |
591 | /* but less than using pointers, and always seems to */ |
644 | /* but less than using pointers, and always seems to */ |
592 | /* successfully return a constant. */ |
645 | /* successfully return a constant. */ |
593 | /* the reason why we have this horrible preprocessor mess */ |
646 | /* the reason why we have this horrible preprocessor mess */ |
594 | /* is to avoid it in all cases, at least on common architectures */ |
647 | /* is to avoid it in all cases, at least on common architectures */ |
595 | /* or when using a recent enough gcc version (>= 4.6) */ |
648 | /* or when using a recent enough gcc version (>= 4.6) */ |
596 | #if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64 |
|
|
597 | return 0x44; |
|
|
598 | #elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ |
649 | #if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \ |
|
|
650 | || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__) |
|
|
651 | #define ECB_LITTLE_ENDIAN 1 |
599 | return 0x44; |
652 | return 0x44332211; |
600 | #elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ |
653 | #elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \ |
|
|
654 | || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__) |
|
|
655 | #define ECB_BIG_ENDIAN 1 |
601 | return 0x11; |
656 | return 0x11223344; |
602 | #else |
657 | #else |
603 | union |
658 | union |
604 | { |
659 | { |
|
|
660 | uint8_t c[4]; |
605 | uint32_t i; |
661 | uint32_t u; |
606 | uint8_t c; |
|
|
607 | } u = { 0x11223344 }; |
662 | } u = { 0x11, 0x22, 0x33, 0x44 }; |
608 | return u.c; |
663 | return u.u; |
609 | #endif |
664 | #endif |
610 | } |
665 | } |
611 | |
666 | |
612 | ecb_inline ecb_const ecb_bool ecb_big_endian (void); |
667 | ecb_inline ecb_const ecb_bool ecb_big_endian (void); |
613 | ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } |
668 | ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; } |
614 | ecb_inline ecb_const ecb_bool ecb_little_endian (void); |
669 | ecb_inline ecb_const ecb_bool ecb_little_endian (void); |
615 | ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; } |
670 | ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; } |
616 | |
671 | |
617 | #if ECB_GCC_VERSION(3,0) || ECB_C99 |
672 | #if ECB_GCC_VERSION(3,0) || ECB_C99 |
618 | #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) |
673 | #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) |
619 | #else |
674 | #else |
620 | #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) |
675 | #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) |
… | |
… | |
645 | } |
700 | } |
646 | #else |
701 | #else |
647 | #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) |
702 | #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) |
648 | #endif |
703 | #endif |
649 | |
704 | |
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705 | ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x); |
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706 | ecb_function_ ecb_const uint32_t |
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707 | ecb_binary16_to_binary32 (uint32_t x) |
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708 | { |
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709 | unsigned int s = (x & 0x8000) << (31 - 15); |
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710 | int e = (x >> 10) & 0x001f; |
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711 | unsigned int m = x & 0x03ff; |
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712 | |
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713 | if (ecb_expect_false (e == 31)) |
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714 | /* infinity or NaN */ |
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715 | e = 255 - (127 - 15); |
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716 | else if (ecb_expect_false (!e)) |
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717 | { |
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718 | if (ecb_expect_true (!m)) |
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719 | /* zero, handled by code below by forcing e to 0 */ |
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720 | e = 0 - (127 - 15); |
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721 | else |
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722 | { |
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723 | /* subnormal, renormalise */ |
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724 | unsigned int s = 10 - ecb_ld32 (m); |
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725 | |
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726 | m = (m << s) & 0x3ff; /* mask implicit bit */ |
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727 | e -= s - 1; |
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728 | } |
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729 | } |
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730 | |
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731 | /* e and m now are normalised, or zero, (or inf or nan) */ |
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732 | e += 127 - 15; |
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733 | |
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734 | return s | (e << 23) | (m << (23 - 10)); |
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735 | } |
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736 | |
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737 | ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x); |
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738 | ecb_function_ ecb_const uint16_t |
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739 | ecb_binary32_to_binary16 (uint32_t x) |
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740 | { |
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741 | unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */ |
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742 | unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */ |
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743 | unsigned int m = x & 0x007fffff; |
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744 | |
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745 | x &= 0x7fffffff; |
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746 | |
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747 | /* if it's within range of binary16 normals, use fast path */ |
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748 | if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff)) |
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749 | { |
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750 | /* mantissa round-to-even */ |
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751 | m += 0x00000fff + ((m >> (23 - 10)) & 1); |
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752 | |
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753 | /* handle overflow */ |
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754 | if (ecb_expect_false (m >= 0x00800000)) |
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755 | { |
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756 | m >>= 1; |
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757 | e += 1; |
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758 | } |
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759 | |
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760 | return s | (e << 10) | (m >> (23 - 10)); |
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761 | } |
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762 | |
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763 | /* handle large numbers and infinity */ |
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764 | if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000)) |
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765 | return s | 0x7c00; |
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766 | |
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767 | /* handle zero, subnormals and small numbers */ |
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768 | if (ecb_expect_true (x < 0x38800000)) |
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769 | { |
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770 | /* zero */ |
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771 | if (ecb_expect_true (!x)) |
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772 | return s; |
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773 | |
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774 | /* handle subnormals */ |
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775 | |
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776 | /* too small, will be zero */ |
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777 | if (e < (14 - 24)) /* might not be sharp, but is good enough */ |
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778 | return s; |
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779 | |
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780 | m |= 0x00800000; /* make implicit bit explicit */ |
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781 | |
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782 | /* very tricky - we need to round to the nearest e (+10) bit value */ |
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783 | { |
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784 | unsigned int bits = 14 - e; |
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785 | unsigned int half = (1 << (bits - 1)) - 1; |
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786 | unsigned int even = (m >> bits) & 1; |
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787 | |
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788 | /* if this overflows, we will end up with a normalised number */ |
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789 | m = (m + half + even) >> bits; |
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790 | } |
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791 | |
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792 | return s | m; |
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793 | } |
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794 | |
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795 | /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */ |
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796 | m >>= 13; |
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797 | |
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798 | return s | 0x7c00 | m | !m; |
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799 | } |
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800 | |
650 | /*******************************************************************************/ |
801 | /*******************************************************************************/ |
651 | /* floating point stuff, can be disabled by defining ECB_NO_LIBM */ |
802 | /* floating point stuff, can be disabled by defining ECB_NO_LIBM */ |
652 | |
803 | |
653 | /* basically, everything uses "ieee pure-endian" floating point numbers */ |
804 | /* basically, everything uses "ieee pure-endian" floating point numbers */ |
654 | /* the only noteworthy exception is ancient armle, which uses order 43218765 */ |
805 | /* the only noteworthy exception is ancient armle, which uses order 43218765 */ |
655 | #if 0 \ |
806 | #if 0 \ |
656 | || __i386 || __i386__ \ |
807 | || __i386 || __i386__ \ |
657 | || __amd64 || __amd64__ || __x86_64 || __x86_64__ \ |
808 | || ECB_GCC_AMD64 \ |
658 | || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \ |
809 | || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \ |
659 | || defined __s390__ || defined __s390x__ \ |
810 | || defined __s390__ || defined __s390x__ \ |
660 | || defined __mips__ \ |
811 | || defined __mips__ \ |
661 | || defined __alpha__ \ |
812 | || defined __alpha__ \ |
662 | || defined __hppa__ \ |
813 | || defined __hppa__ \ |
663 | || defined __ia64__ \ |
814 | || defined __ia64__ \ |
664 | || defined __m68k__ \ |
815 | || defined __m68k__ \ |
665 | || defined __m88k__ \ |
816 | || defined __m88k__ \ |
666 | || defined __sh__ \ |
817 | || defined __sh__ \ |
667 | || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 \ |
818 | || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \ |
668 | || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \ |
819 | || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \ |
669 | || defined __aarch64__ |
820 | || defined __aarch64__ |
670 | #define ECB_STDFP 1 |
821 | #define ECB_STDFP 1 |
671 | #include <string.h> /* for memcpy */ |
822 | #include <string.h> /* for memcpy */ |
672 | #else |
823 | #else |
… | |
… | |
690 | #define ECB_NAN ECB_INFINITY |
841 | #define ECB_NAN ECB_INFINITY |
691 | #endif |
842 | #endif |
692 | |
843 | |
693 | #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L |
844 | #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L |
694 | #define ecb_ldexpf(x,e) ldexpf ((x), (e)) |
845 | #define ecb_ldexpf(x,e) ldexpf ((x), (e)) |
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846 | #define ecb_frexpf(x,e) frexpf ((x), (e)) |
695 | #else |
847 | #else |
696 | #define ecb_ldexpf(x,e) (float) ldexp ((x), (e)) |
848 | #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e)) |
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849 | #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e)) |
697 | #endif |
850 | #endif |
698 | |
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699 | /* converts an ieee half/binary16 to a float */ |
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700 | ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x); |
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701 | ecb_function_ ecb_const float |
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702 | ecb_binary16_to_float (uint16_t x) |
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703 | { |
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704 | int e = (x >> 10) & 0x1f; |
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705 | int m = x & 0x3ff; |
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706 | float r; |
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707 | |
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708 | if (!e ) r = ecb_ldexpf (m , -24); |
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709 | else if (e != 31) r = ecb_ldexpf (m + 0x400, e - 25); |
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710 | else if (m ) r = ECB_NAN; |
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711 | else r = ECB_INFINITY; |
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712 | |
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713 | return x & 0x8000 ? -r : r; |
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714 | } |
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715 | |
851 | |
716 | /* convert a float to ieee single/binary32 */ |
852 | /* convert a float to ieee single/binary32 */ |
717 | ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x); |
853 | ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x); |
718 | ecb_function_ ecb_const uint32_t |
854 | ecb_function_ ecb_const uint32_t |
719 | ecb_float_to_binary32 (float x) |
855 | ecb_float_to_binary32 (float x) |
… | |
… | |
730 | if (x == 0e0f ) return 0x00000000U; |
866 | if (x == 0e0f ) return 0x00000000U; |
731 | if (x > +3.40282346638528860e+38f) return 0x7f800000U; |
867 | if (x > +3.40282346638528860e+38f) return 0x7f800000U; |
732 | if (x < -3.40282346638528860e+38f) return 0xff800000U; |
868 | if (x < -3.40282346638528860e+38f) return 0xff800000U; |
733 | if (x != x ) return 0x7fbfffffU; |
869 | if (x != x ) return 0x7fbfffffU; |
734 | |
870 | |
735 | m = frexpf (x, &e) * 0x1000000U; |
871 | m = ecb_frexpf (x, &e) * 0x1000000U; |
736 | |
872 | |
737 | r = m & 0x80000000U; |
873 | r = m & 0x80000000U; |
738 | |
874 | |
739 | if (r) |
875 | if (r) |
740 | m = -m; |
876 | m = -m; |
… | |
… | |
851 | #endif |
987 | #endif |
852 | |
988 | |
853 | return r; |
989 | return r; |
854 | } |
990 | } |
855 | |
991 | |
856 | #endif |
992 | /* convert a float to ieee half/binary16 */ |
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993 | ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x); |
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994 | ecb_function_ ecb_const uint16_t |
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995 | ecb_float_to_binary16 (float x) |
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996 | { |
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997 | return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x)); |
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998 | } |
857 | |
999 | |
858 | #endif |
1000 | /* convert an ieee half/binary16 to float */ |
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1001 | ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x); |
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1002 | ecb_function_ ecb_const float |
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1003 | ecb_binary16_to_float (uint16_t x) |
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1004 | { |
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1005 | return ecb_binary32_to_float (ecb_binary16_to_binary32 (x)); |
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1006 | } |
859 | |
1007 | |
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1008 | #endif |
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1009 | |
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1010 | #endif |
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1011 | |