1 | /* |
1 | /* |
2 | * libecb - http://software.schmorp.de/pkg/libecb |
2 | * libecb - http://software.schmorp.de/pkg/libecb |
3 | * |
3 | * |
4 | * Copyright (©) 2009-2014 Marc Alexander Lehmann <libecb@schmorp.de> |
4 | * Copyright (©) 2009-2015 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 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") |
… | |
… | |
302 | |
322 | |
303 | #define ECB_CONCAT_(a, b) a ## b |
323 | #define ECB_CONCAT_(a, b) a ## b |
304 | #define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) |
324 | #define ECB_CONCAT(a, b) ECB_CONCAT_(a, b) |
305 | #define ECB_STRINGIFY_(a) # a |
325 | #define ECB_STRINGIFY_(a) # a |
306 | #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) |
326 | #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a) |
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|
327 | #define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr)) |
307 | |
328 | |
308 | #define ecb_function_ ecb_inline |
329 | #define ecb_function_ ecb_inline |
309 | |
330 | |
310 | #if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8) |
331 | #if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8) |
311 | #define ecb_attribute(attrlist) __attribute__ (attrlist) |
332 | #define ecb_attribute(attrlist) __attribute__ (attrlist) |
… | |
… | |
348 | #define ecb_deprecated __declspec (deprecated) |
369 | #define ecb_deprecated __declspec (deprecated) |
349 | #else |
370 | #else |
350 | #define ecb_deprecated ecb_attribute ((__deprecated__)) |
371 | #define ecb_deprecated ecb_attribute ((__deprecated__)) |
351 | #endif |
372 | #endif |
352 | |
373 | |
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374 | #if _MSC_VER >= 1500 |
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375 | #define ecb_deprecated_message(msg) __declspec (deprecated (msg)) |
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376 | #elif ECB_GCC_VERSION(4,5) |
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377 | #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg)) |
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378 | #else |
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379 | #define ecb_deprecated_message(msg) ecb_deprecated |
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380 | #endif |
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381 | |
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382 | #if _MSC_VER >= 1400 |
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383 | #define ecb_noinline __declspec (noinline) |
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384 | #else |
353 | #define ecb_noinline ecb_attribute ((__noinline__)) |
385 | #define ecb_noinline ecb_attribute ((__noinline__)) |
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386 | #endif |
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387 | |
354 | #define ecb_unused ecb_attribute ((__unused__)) |
388 | #define ecb_unused ecb_attribute ((__unused__)) |
355 | #define ecb_const ecb_attribute ((__const__)) |
389 | #define ecb_const ecb_attribute ((__const__)) |
356 | #define ecb_pure ecb_attribute ((__pure__)) |
390 | #define ecb_pure ecb_attribute ((__pure__)) |
357 | |
391 | |
358 | /* TODO http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx __declspec(noreturn) */ |
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359 | #if ECB_C11 || __IBMC_NORETURN |
392 | #if ECB_C11 || __IBMC_NORETURN |
360 | /* 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 */ |
361 | #define ecb_noreturn _Noreturn |
394 | #define ecb_noreturn _Noreturn |
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395 | #elif ECB_CPP11 |
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396 | #define ecb_noreturn [[noreturn]] |
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397 | #elif _MSC_VER >= 1200 |
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398 | /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */ |
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399 | #define ecb_noreturn __declspec (noreturn) |
362 | #else |
400 | #else |
363 | #define ecb_noreturn ecb_attribute ((__noreturn__)) |
401 | #define ecb_noreturn ecb_attribute ((__noreturn__)) |
364 | #endif |
402 | #endif |
365 | |
403 | |
366 | #if ECB_GCC_VERSION(4,3) |
404 | #if ECB_GCC_VERSION(4,3) |
… | |
… | |
393 | #define ecb_ctz32(x) __builtin_ctz (x) |
431 | #define ecb_ctz32(x) __builtin_ctz (x) |
394 | #define ecb_ctz64(x) __builtin_ctzll (x) |
432 | #define ecb_ctz64(x) __builtin_ctzll (x) |
395 | #define ecb_popcount32(x) __builtin_popcount (x) |
433 | #define ecb_popcount32(x) __builtin_popcount (x) |
396 | /* no popcountll */ |
434 | /* no popcountll */ |
397 | #else |
435 | #else |
398 | ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const; |
436 | ecb_function_ ecb_const int ecb_ctz32 (uint32_t x); |
399 | ecb_function_ int |
437 | ecb_function_ ecb_const int |
400 | ecb_ctz32 (uint32_t x) |
438 | ecb_ctz32 (uint32_t x) |
401 | { |
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 |
402 | int r = 0; |
445 | int r = 0; |
403 | |
446 | |
404 | x &= ~x + 1; /* this isolates the lowest bit */ |
447 | x &= ~x + 1; /* this isolates the lowest bit */ |
405 | |
448 | |
406 | #if ECB_branchless_on_i386 |
449 | #if ECB_branchless_on_i386 |
… | |
… | |
416 | if (x & 0xff00ff00) r += 8; |
459 | if (x & 0xff00ff00) r += 8; |
417 | if (x & 0xffff0000) r += 16; |
460 | if (x & 0xffff0000) r += 16; |
418 | #endif |
461 | #endif |
419 | |
462 | |
420 | return r; |
463 | return r; |
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464 | #endif |
421 | } |
465 | } |
422 | |
466 | |
423 | ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const; |
467 | ecb_function_ ecb_const int ecb_ctz64 (uint64_t x); |
424 | ecb_function_ int |
468 | ecb_function_ ecb_const int |
425 | ecb_ctz64 (uint64_t x) |
469 | ecb_ctz64 (uint64_t x) |
426 | { |
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 |
427 | int shift = x & 0xffffffffU ? 0 : 32; |
476 | int shift = x & 0xffffffff ? 0 : 32; |
428 | return ecb_ctz32 (x >> shift) + shift; |
477 | return ecb_ctz32 (x >> shift) + shift; |
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478 | #endif |
429 | } |
479 | } |
430 | |
480 | |
431 | ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const; |
481 | ecb_function_ ecb_const int ecb_popcount32 (uint32_t x); |
432 | ecb_function_ int |
482 | ecb_function_ ecb_const int |
433 | ecb_popcount32 (uint32_t x) |
483 | ecb_popcount32 (uint32_t x) |
434 | { |
484 | { |
435 | x -= (x >> 1) & 0x55555555; |
485 | x -= (x >> 1) & 0x55555555; |
436 | x = ((x >> 2) & 0x33333333) + (x & 0x33333333); |
486 | x = ((x >> 2) & 0x33333333) + (x & 0x33333333); |
437 | x = ((x >> 4) + x) & 0x0f0f0f0f; |
487 | x = ((x >> 4) + x) & 0x0f0f0f0f; |
438 | x *= 0x01010101; |
488 | x *= 0x01010101; |
439 | |
489 | |
440 | return x >> 24; |
490 | return x >> 24; |
441 | } |
491 | } |
442 | |
492 | |
443 | ecb_function_ int ecb_ld32 (uint32_t x) ecb_const; |
493 | ecb_function_ ecb_const int ecb_ld32 (uint32_t x); |
444 | ecb_function_ int ecb_ld32 (uint32_t x) |
494 | ecb_function_ ecb_const int ecb_ld32 (uint32_t x) |
445 | { |
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 |
446 | int r = 0; |
501 | int r = 0; |
447 | |
502 | |
448 | if (x >> 16) { x >>= 16; r += 16; } |
503 | if (x >> 16) { x >>= 16; r += 16; } |
449 | if (x >> 8) { x >>= 8; r += 8; } |
504 | if (x >> 8) { x >>= 8; r += 8; } |
450 | if (x >> 4) { x >>= 4; r += 4; } |
505 | if (x >> 4) { x >>= 4; r += 4; } |
451 | if (x >> 2) { x >>= 2; r += 2; } |
506 | if (x >> 2) { x >>= 2; r += 2; } |
452 | if (x >> 1) { r += 1; } |
507 | if (x >> 1) { r += 1; } |
453 | |
508 | |
454 | return r; |
509 | return r; |
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510 | #endif |
455 | } |
511 | } |
456 | |
512 | |
457 | ecb_function_ int ecb_ld64 (uint64_t x) ecb_const; |
513 | ecb_function_ ecb_const int ecb_ld64 (uint64_t x); |
458 | ecb_function_ int ecb_ld64 (uint64_t x) |
514 | ecb_function_ ecb_const int ecb_ld64 (uint64_t x) |
459 | { |
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 |
460 | int r = 0; |
521 | int r = 0; |
461 | |
522 | |
462 | if (x >> 32) { x >>= 32; r += 32; } |
523 | if (x >> 32) { x >>= 32; r += 32; } |
463 | |
524 | |
464 | return r + ecb_ld32 (x); |
525 | return r + ecb_ld32 (x); |
465 | } |
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466 | #endif |
526 | #endif |
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527 | } |
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528 | #endif |
467 | |
529 | |
468 | ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const; |
530 | ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x); |
469 | ecb_function_ 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)); } |
470 | ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const; |
532 | ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x); |
471 | ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); } |
533 | ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); } |
472 | |
534 | |
473 | ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const; |
535 | ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x); |
474 | ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) |
536 | ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x) |
475 | { |
537 | { |
476 | return ( (x * 0x0802U & 0x22110U) |
538 | return ( (x * 0x0802U & 0x22110U) |
477 | | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16; |
539 | | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16; |
478 | } |
540 | } |
479 | |
541 | |
480 | ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const; |
542 | ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x); |
481 | ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) |
543 | ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x) |
482 | { |
544 | { |
483 | x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1); |
545 | x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1); |
484 | x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2); |
546 | x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2); |
485 | x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4); |
547 | x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4); |
486 | x = ( x >> 8 ) | ( x << 8); |
548 | x = ( x >> 8 ) | ( x << 8); |
487 | |
549 | |
488 | return x; |
550 | return x; |
489 | } |
551 | } |
490 | |
552 | |
491 | ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const; |
553 | ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x); |
492 | ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) |
554 | ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x) |
493 | { |
555 | { |
494 | x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1); |
556 | x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1); |
495 | x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2); |
557 | x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2); |
496 | x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4); |
558 | x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4); |
497 | x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8); |
559 | x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8); |
… | |
… | |
500 | return x; |
562 | return x; |
501 | } |
563 | } |
502 | |
564 | |
503 | /* popcount64 is only available on 64 bit cpus as gcc builtin */ |
565 | /* popcount64 is only available on 64 bit cpus as gcc builtin */ |
504 | /* so for this version we are lazy */ |
566 | /* so for this version we are lazy */ |
505 | ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const; |
567 | ecb_function_ ecb_const int ecb_popcount64 (uint64_t x); |
506 | ecb_function_ int |
568 | ecb_function_ ecb_const int |
507 | ecb_popcount64 (uint64_t x) |
569 | ecb_popcount64 (uint64_t x) |
508 | { |
570 | { |
509 | return ecb_popcount32 (x) + ecb_popcount32 (x >> 32); |
571 | return ecb_popcount32 (x) + ecb_popcount32 (x >> 32); |
510 | } |
572 | } |
511 | |
573 | |
512 | ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const; |
574 | ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count); |
513 | ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const; |
575 | ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count); |
514 | ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const; |
576 | ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count); |
515 | ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const; |
577 | ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count); |
516 | ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const; |
578 | ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count); |
517 | ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const; |
579 | ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count); |
518 | ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const; |
580 | ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count); |
519 | ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const; |
581 | ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count); |
520 | |
582 | |
521 | ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); } |
583 | ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); } |
522 | ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); } |
584 | ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); } |
523 | ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); } |
585 | ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); } |
524 | ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); } |
586 | ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); } |
525 | ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); } |
587 | ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); } |
526 | ecb_inline 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); } |
527 | ecb_inline 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); } |
528 | ecb_inline 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); } |
529 | |
591 | |
530 | #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)) |
|
|
593 | #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16) |
|
|
594 | #define ecb_bswap16(x) __builtin_bswap16 (x) |
|
|
595 | #else |
531 | #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) |
596 | #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16) |
|
|
597 | #endif |
532 | #define ecb_bswap32(x) __builtin_bswap32 (x) |
598 | #define ecb_bswap32(x) __builtin_bswap32 (x) |
533 | #define ecb_bswap64(x) __builtin_bswap64 (x) |
599 | #define ecb_bswap64(x) __builtin_bswap64 (x) |
|
|
600 | #elif _MSC_VER |
|
|
601 | #include <stdlib.h> |
|
|
602 | #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x))) |
|
|
603 | #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x))) |
|
|
604 | #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x))) |
534 | #else |
605 | #else |
535 | ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const; |
606 | ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x); |
536 | ecb_function_ uint16_t |
607 | ecb_function_ ecb_const uint16_t |
537 | ecb_bswap16 (uint16_t x) |
608 | ecb_bswap16 (uint16_t x) |
538 | { |
609 | { |
539 | return ecb_rotl16 (x, 8); |
610 | return ecb_rotl16 (x, 8); |
540 | } |
611 | } |
541 | |
612 | |
542 | ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const; |
613 | ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x); |
543 | ecb_function_ uint32_t |
614 | ecb_function_ ecb_const uint32_t |
544 | ecb_bswap32 (uint32_t x) |
615 | ecb_bswap32 (uint32_t x) |
545 | { |
616 | { |
546 | return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16); |
617 | return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16); |
547 | } |
618 | } |
548 | |
619 | |
549 | ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const; |
620 | ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x); |
550 | ecb_function_ uint64_t |
621 | ecb_function_ ecb_const uint64_t |
551 | ecb_bswap64 (uint64_t x) |
622 | ecb_bswap64 (uint64_t x) |
552 | { |
623 | { |
553 | return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32); |
624 | return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32); |
554 | } |
625 | } |
555 | #endif |
626 | #endif |
556 | |
627 | |
557 | #if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable) |
628 | #if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable) |
558 | #define ecb_unreachable() __builtin_unreachable () |
629 | #define ecb_unreachable() __builtin_unreachable () |
559 | #else |
630 | #else |
560 | /* this seems to work fine, but gcc always emits a warning for it :/ */ |
631 | /* this seems to work fine, but gcc always emits a warning for it :/ */ |
561 | ecb_inline void ecb_unreachable (void) ecb_noreturn; |
632 | ecb_inline ecb_noreturn void ecb_unreachable (void); |
562 | ecb_inline void ecb_unreachable (void) { } |
633 | ecb_inline ecb_noreturn void ecb_unreachable (void) { } |
563 | #endif |
634 | #endif |
564 | |
635 | |
565 | /* try to tell the compiler that some condition is definitely true */ |
636 | /* try to tell the compiler that some condition is definitely true */ |
566 | #define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0 |
637 | #define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0 |
567 | |
638 | |
568 | ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const; |
639 | ecb_inline ecb_const uint32_t ecb_byteorder_helper (void); |
569 | ecb_inline unsigned char |
640 | ecb_inline ecb_const uint32_t |
570 | ecb_byteorder_helper (void) |
641 | ecb_byteorder_helper (void) |
571 | { |
642 | { |
572 | /* the union code still generates code under pressure in gcc, */ |
643 | /* the union code still generates code under pressure in gcc, */ |
573 | /* but less than using pointers, and always seems to */ |
644 | /* but less than using pointers, and always seems to */ |
574 | /* successfully return a constant. */ |
645 | /* successfully return a constant. */ |
575 | /* the reason why we have this horrible preprocessor mess */ |
646 | /* the reason why we have this horrible preprocessor mess */ |
576 | /* 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 */ |
577 | /* or when using a recent enough gcc version (>= 4.6) */ |
648 | /* or when using a recent enough gcc version (>= 4.6) */ |
578 | #if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64 |
|
|
579 | return 0x44; |
|
|
580 | #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 |
581 | return 0x44; |
652 | return 0x44332211; |
582 | #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 |
583 | return 0x11; |
656 | return 0x11223344; |
584 | #else |
657 | #else |
585 | union |
658 | union |
586 | { |
659 | { |
|
|
660 | uint8_t c[4]; |
587 | uint32_t i; |
661 | uint32_t u; |
588 | uint8_t c; |
|
|
589 | } u = { 0x11223344 }; |
662 | } u = { 0x11, 0x22, 0x33, 0x44 }; |
590 | return u.c; |
663 | return u.u; |
591 | #endif |
664 | #endif |
592 | } |
665 | } |
593 | |
666 | |
594 | ecb_inline ecb_bool ecb_big_endian (void) ecb_const; |
667 | ecb_inline ecb_const ecb_bool ecb_big_endian (void); |
595 | ecb_inline 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; } |
596 | ecb_inline ecb_bool ecb_little_endian (void) ecb_const; |
669 | ecb_inline ecb_const ecb_bool ecb_little_endian (void); |
597 | ecb_inline 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; } |
598 | |
671 | |
599 | #if ECB_GCC_VERSION(3,0) || ECB_C99 |
672 | #if ECB_GCC_VERSION(3,0) || ECB_C99 |
600 | #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)) |
601 | #else |
674 | #else |
602 | #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))) |
… | |
… | |
627 | } |
700 | } |
628 | #else |
701 | #else |
629 | #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) |
702 | #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) |
630 | #endif |
703 | #endif |
631 | |
704 | |
|
|
705 | ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x); |
|
|
706 | ecb_function_ ecb_const uint32_t |
|
|
707 | ecb_binary16_to_binary32 (uint32_t x) |
|
|
708 | { |
|
|
709 | unsigned int s = (x & 0x8000) << (31 - 15); |
|
|
710 | int e = (x >> 10) & 0x001f; |
|
|
711 | unsigned int m = x & 0x03ff; |
|
|
712 | |
|
|
713 | if (ecb_expect_false (e == 31)) |
|
|
714 | /* infinity or NaN */ |
|
|
715 | e = 255 - (127 - 15); |
|
|
716 | else if (ecb_expect_false (!e)) |
|
|
717 | { |
|
|
718 | if (ecb_expect_true (!m)) |
|
|
719 | /* zero, handled by code below by forcing e to 0 */ |
|
|
720 | e = 0 - (127 - 15); |
|
|
721 | else |
|
|
722 | { |
|
|
723 | /* subnormal, renormalise */ |
|
|
724 | unsigned int s = 10 - ecb_ld32 (m); |
|
|
725 | |
|
|
726 | m = (m << s) & 0x3ff; /* mask implicit bit */ |
|
|
727 | e -= s - 1; |
|
|
728 | } |
|
|
729 | } |
|
|
730 | |
|
|
731 | /* e and m now are normalised, or zero, (or inf or nan) */ |
|
|
732 | e += 127 - 15; |
|
|
733 | |
|
|
734 | return s | (e << 23) | (m << (23 - 10)); |
|
|
735 | } |
|
|
736 | |
|
|
737 | ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x); |
|
|
738 | ecb_function_ ecb_const uint16_t |
|
|
739 | ecb_binary32_to_binary16 (uint32_t x) |
|
|
740 | { |
|
|
741 | unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */ |
|
|
742 | unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */ |
|
|
743 | unsigned int m = x & 0x007fffff; |
|
|
744 | |
|
|
745 | x &= 0x7fffffff; |
|
|
746 | |
|
|
747 | /* if it's within range of binary16 normals, use fast path */ |
|
|
748 | if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff)) |
|
|
749 | { |
|
|
750 | /* mantissa round-to-even */ |
|
|
751 | m += 0x00000fff + ((m >> (23 - 10)) & 1); |
|
|
752 | |
|
|
753 | /* handle overflow */ |
|
|
754 | if (ecb_expect_false (m >= 0x00800000)) |
|
|
755 | { |
|
|
756 | m >>= 1; |
|
|
757 | e += 1; |
|
|
758 | } |
|
|
759 | |
|
|
760 | return s | (e << 10) | (m >> (23 - 10)); |
|
|
761 | } |
|
|
762 | |
|
|
763 | /* handle large numbers and infinity */ |
|
|
764 | if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000)) |
|
|
765 | return s | 0x7c00; |
|
|
766 | |
|
|
767 | /* handle zero, subnormals and small numbers */ |
|
|
768 | if (ecb_expect_true (x < 0x38800000)) |
|
|
769 | { |
|
|
770 | /* zero */ |
|
|
771 | if (ecb_expect_true (!x)) |
|
|
772 | return s; |
|
|
773 | |
|
|
774 | /* handle subnormals */ |
|
|
775 | |
|
|
776 | /* too small, will be zero */ |
|
|
777 | if (e < (14 - 24)) /* might not be sharp, but is good enough */ |
|
|
778 | return s; |
|
|
779 | |
|
|
780 | m |= 0x00800000; /* make implicit bit explicit */ |
|
|
781 | |
|
|
782 | /* very tricky - we need to round to the nearest e (+10) bit value */ |
|
|
783 | { |
|
|
784 | unsigned int bits = 14 - e; |
|
|
785 | unsigned int half = (1 << (bits - 1)) - 1; |
|
|
786 | unsigned int even = (m >> bits) & 1; |
|
|
787 | |
|
|
788 | /* if this overflows, we will end up with a normalised number */ |
|
|
789 | m = (m + half + even) >> bits; |
|
|
790 | } |
|
|
791 | |
|
|
792 | return s | m; |
|
|
793 | } |
|
|
794 | |
|
|
795 | /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */ |
|
|
796 | m >>= 13; |
|
|
797 | |
|
|
798 | return s | 0x7c00 | m | !m; |
|
|
799 | } |
|
|
800 | |
632 | /*******************************************************************************/ |
801 | /*******************************************************************************/ |
633 | /* floating point stuff, can be disabled by defining ECB_NO_LIBM */ |
802 | /* floating point stuff, can be disabled by defining ECB_NO_LIBM */ |
634 | |
803 | |
635 | /* basically, everything uses "ieee pure-endian" floating point numbers */ |
804 | /* basically, everything uses "ieee pure-endian" floating point numbers */ |
636 | /* the only noteworthy exception is ancient armle, which uses order 43218765 */ |
805 | /* the only noteworthy exception is ancient armle, which uses order 43218765 */ |
637 | #if 0 \ |
806 | #if 0 \ |
638 | || __i386 || __i386__ \ |
807 | || __i386 || __i386__ \ |
639 | || __amd64 || __amd64__ || __x86_64 || __x86_64__ \ |
808 | || ECB_GCC_AMD64 \ |
640 | || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \ |
809 | || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \ |
641 | || defined __s390__ || defined __s390x__ \ |
810 | || defined __s390__ || defined __s390x__ \ |
642 | || defined __mips__ \ |
811 | || defined __mips__ \ |
643 | || defined __alpha__ \ |
812 | || defined __alpha__ \ |
644 | || defined __hppa__ \ |
813 | || defined __hppa__ \ |
645 | || defined __ia64__ \ |
814 | || defined __ia64__ \ |
646 | || defined __m68k__ \ |
815 | || defined __m68k__ \ |
647 | || defined __m88k__ \ |
816 | || defined __m88k__ \ |
648 | || defined __sh__ \ |
817 | || defined __sh__ \ |
649 | || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 \ |
818 | || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \ |
650 | || (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__)) \ |
651 | || defined __aarch64__ |
820 | || defined __aarch64__ |
652 | #define ECB_STDFP 1 |
821 | #define ECB_STDFP 1 |
653 | #include <string.h> /* for memcpy */ |
822 | #include <string.h> /* for memcpy */ |
654 | #else |
823 | #else |
… | |
… | |
672 | #define ECB_NAN ECB_INFINITY |
841 | #define ECB_NAN ECB_INFINITY |
673 | #endif |
842 | #endif |
674 | |
843 | |
675 | #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L |
844 | #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L |
676 | #define ecb_ldexpf(x,e) ldexpf ((x), (e)) |
845 | #define ecb_ldexpf(x,e) ldexpf ((x), (e)) |
|
|
846 | #define ecb_frexpf(x,e) frexpf ((x), (e)) |
677 | #else |
847 | #else |
678 | #define ecb_ldexpf(x,e) (float) ldexp ((x), (e)) |
848 | #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e)) |
|
|
849 | #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e)) |
679 | #endif |
850 | #endif |
680 | |
|
|
681 | /* converts an ieee half/binary16 to a float */ |
|
|
682 | ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const; |
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683 | ecb_function_ float |
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684 | ecb_binary16_to_float (uint16_t x) |
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685 | { |
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686 | int e = (x >> 10) & 0x1f; |
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687 | int m = x & 0x3ff; |
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688 | float r; |
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689 | |
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690 | if (!e ) r = ecb_ldexpf (m , -24); |
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691 | else if (e != 31) r = ecb_ldexpf (m + 0x400, e - 25); |
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692 | else if (m ) r = ECB_NAN; |
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693 | else r = ECB_INFINITY; |
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694 | |
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695 | return x & 0x8000 ? -r : r; |
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696 | } |
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697 | |
851 | |
698 | /* convert a float to ieee single/binary32 */ |
852 | /* convert a float to ieee single/binary32 */ |
699 | ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const; |
853 | ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x); |
700 | ecb_function_ uint32_t |
854 | ecb_function_ ecb_const uint32_t |
701 | ecb_float_to_binary32 (float x) |
855 | ecb_float_to_binary32 (float x) |
702 | { |
856 | { |
703 | uint32_t r; |
857 | uint32_t r; |
704 | |
858 | |
705 | #if ECB_STDFP |
859 | #if ECB_STDFP |
… | |
… | |
712 | if (x == 0e0f ) return 0x00000000U; |
866 | if (x == 0e0f ) return 0x00000000U; |
713 | if (x > +3.40282346638528860e+38f) return 0x7f800000U; |
867 | if (x > +3.40282346638528860e+38f) return 0x7f800000U; |
714 | if (x < -3.40282346638528860e+38f) return 0xff800000U; |
868 | if (x < -3.40282346638528860e+38f) return 0xff800000U; |
715 | if (x != x ) return 0x7fbfffffU; |
869 | if (x != x ) return 0x7fbfffffU; |
716 | |
870 | |
717 | m = frexpf (x, &e) * 0x1000000U; |
871 | m = ecb_frexpf (x, &e) * 0x1000000U; |
718 | |
872 | |
719 | r = m & 0x80000000U; |
873 | r = m & 0x80000000U; |
720 | |
874 | |
721 | if (r) |
875 | if (r) |
722 | m = -m; |
876 | m = -m; |
… | |
… | |
734 | |
888 | |
735 | return r; |
889 | return r; |
736 | } |
890 | } |
737 | |
891 | |
738 | /* converts an ieee single/binary32 to a float */ |
892 | /* converts an ieee single/binary32 to a float */ |
739 | ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const; |
893 | ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x); |
740 | ecb_function_ float |
894 | ecb_function_ ecb_const float |
741 | ecb_binary32_to_float (uint32_t x) |
895 | ecb_binary32_to_float (uint32_t x) |
742 | { |
896 | { |
743 | float r; |
897 | float r; |
744 | |
898 | |
745 | #if ECB_STDFP |
899 | #if ECB_STDFP |
… | |
… | |
764 | |
918 | |
765 | return r; |
919 | return r; |
766 | } |
920 | } |
767 | |
921 | |
768 | /* convert a double to ieee double/binary64 */ |
922 | /* convert a double to ieee double/binary64 */ |
769 | ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const; |
923 | ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x); |
770 | ecb_function_ uint64_t |
924 | ecb_function_ ecb_const uint64_t |
771 | ecb_double_to_binary64 (double x) |
925 | ecb_double_to_binary64 (double x) |
772 | { |
926 | { |
773 | uint64_t r; |
927 | uint64_t r; |
774 | |
928 | |
775 | #if ECB_STDFP |
929 | #if ECB_STDFP |
… | |
… | |
804 | |
958 | |
805 | return r; |
959 | return r; |
806 | } |
960 | } |
807 | |
961 | |
808 | /* converts an ieee double/binary64 to a double */ |
962 | /* converts an ieee double/binary64 to a double */ |
809 | ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const; |
963 | ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x); |
810 | ecb_function_ double |
964 | ecb_function_ ecb_const double |
811 | ecb_binary64_to_double (uint64_t x) |
965 | ecb_binary64_to_double (uint64_t x) |
812 | { |
966 | { |
813 | double r; |
967 | double r; |
814 | |
968 | |
815 | #if ECB_STDFP |
969 | #if ECB_STDFP |
… | |
… | |
833 | #endif |
987 | #endif |
834 | |
988 | |
835 | return r; |
989 | return r; |
836 | } |
990 | } |
837 | |
991 | |
838 | #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 | } |
839 | |
999 | |
840 | #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 | } |
841 | |
1007 | |
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1008 | #endif |
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1009 | |
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1010 | #endif |
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1011 | |