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Comparing libecb/ecb.h (file contents):
Revision 1.167 by root, Sat Nov 21 16:53:50 2015 UTC vs.
Revision 1.177 by root, Mon Nov 19 00:27:38 2018 UTC

… …
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
… …
115 #define ECB_CLANG_EXTENSION(x) 0 115 #define ECB_CLANG_EXTENSION(x) 0
116#endif 116#endif
117 117
118#define ECB_CPP (__cplusplus+0) 118#define ECB_CPP (__cplusplus+0)
119#define ECB_CPP11 (__cplusplus >= 201103L) 119#define ECB_CPP11 (__cplusplus >= 201103L)
120#define ECB_CPP14 (__cplusplus >= 201402L)
121#define ECB_CPP17 (__cplusplus >= 201703L)
120 122
121#if ECB_CPP 123#if ECB_CPP
122 #define ECB_C 0 124 #define ECB_C 0
123 #define ECB_STDC_VERSION 0 125 #define ECB_STDC_VERSION 0
124#else 126#else
… …
126 #define ECB_STDC_VERSION __STDC_VERSION__ 128 #define ECB_STDC_VERSION __STDC_VERSION__
127#endif 129#endif
128 130
129#define ECB_C99 (ECB_STDC_VERSION >= 199901L) 131#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
130#define ECB_C11 (ECB_STDC_VERSION >= 201112L) 132#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
133#define ECB_C17 (ECB_STDC_VERSION >= 201710L)
131 134
132#if ECB_CPP 135#if ECB_CPP
133 #define ECB_EXTERN_C extern "C" 136 #define ECB_EXTERN_C extern "C"
134 #define ECB_EXTERN_C_BEG ECB_EXTERN_C { 137 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
135 #define ECB_EXTERN_C_END } 138 #define ECB_EXTERN_C_END }
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153#endif 156#endif
154 157
155/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */ 158/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
156#if __xlC__ && ECB_CPP 159#if __xlC__ && ECB_CPP
157 #include <builtins.h> 160 #include <builtins.h>
161#endif
162
163#if 1400 <= _MSC_VER
164 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
158#endif 165#endif
159 166
160#ifndef ECB_MEMORY_FENCE 167#ifndef ECB_MEMORY_FENCE
161 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110 168 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
162 #if __i386 || __i386__ 169 #if __i386 || __i386__
163 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory") 170 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
164 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") 171 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
165 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") 172 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
166 #elif ECB_GCC_AMD64 173 #elif ECB_GCC_AMD64
167 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory") 174 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
168 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory") 175 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
169 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("") 176 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
170 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ 177 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
171 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory") 178 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
179 #elif defined __ARM_ARCH_2__ \
180 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
181 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
182 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
183 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
184 || defined __ARM_ARCH_5TEJ__
185 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
172 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \ 186 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
173 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ 187 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
188 || defined __ARM_ARCH_6T2__
174 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory") 189 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
175 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \ 190 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
176 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__ 191 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
177 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory") 192 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
178 #elif __aarch64__ 193 #elif __aarch64__
179 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory") 194 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
180 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8) 195 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
181 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory") 196 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
… …
423#else 438#else
424 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x); 439 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
425 ecb_function_ ecb_const int 440 ecb_function_ ecb_const int
426 ecb_ctz32 (uint32_t x) 441 ecb_ctz32 (uint32_t x)
427 { 442 {
443#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
444 unsigned long r;
445 _BitScanForward (&r, x);
446 return (int)r;
447#else
428 int r = 0; 448 int r = 0;
429 449
430 x &= ~x + 1; /* this isolates the lowest bit */ 450 x &= ~x + 1; /* this isolates the lowest bit */
431 451
432#if ECB_branchless_on_i386 452#if ECB_branchless_on_i386
… …
442 if (x & 0xff00ff00) r += 8; 462 if (x & 0xff00ff00) r += 8;
443 if (x & 0xffff0000) r += 16; 463 if (x & 0xffff0000) r += 16;
444#endif 464#endif
445 465
446 return r; 466 return r;
467#endif
447 } 468 }
448 469
449 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x); 470 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
450 ecb_function_ ecb_const int 471 ecb_function_ ecb_const int
451 ecb_ctz64 (uint64_t x) 472 ecb_ctz64 (uint64_t x)
452 { 473 {
474#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
475 unsigned long r;
476 _BitScanForward64 (&r, x);
477 return (int)r;
478#else
453 int shift = x & 0xffffffffU ? 0 : 32; 479 int shift = x & 0xffffffff ? 0 : 32;
454 return ecb_ctz32 (x >> shift) + shift; 480 return ecb_ctz32 (x >> shift) + shift;
481#endif
455 } 482 }
456 483
457 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x); 484 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
458 ecb_function_ ecb_const int 485 ecb_function_ ecb_const int
459 ecb_popcount32 (uint32_t x) 486 ecb_popcount32 (uint32_t x)
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467 } 494 }
468 495
469 ecb_function_ ecb_const int ecb_ld32 (uint32_t x); 496 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
470 ecb_function_ ecb_const int ecb_ld32 (uint32_t x) 497 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
471 { 498 {
499#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
500 unsigned long r;
501 _BitScanReverse (&r, x);
502 return (int)r;
503#else
472 int r = 0; 504 int r = 0;
473 505
474 if (x >> 16) { x >>= 16; r += 16; } 506 if (x >> 16) { x >>= 16; r += 16; }
475 if (x >> 8) { x >>= 8; r += 8; } 507 if (x >> 8) { x >>= 8; r += 8; }
476 if (x >> 4) { x >>= 4; r += 4; } 508 if (x >> 4) { x >>= 4; r += 4; }
477 if (x >> 2) { x >>= 2; r += 2; } 509 if (x >> 2) { x >>= 2; r += 2; }
478 if (x >> 1) { r += 1; } 510 if (x >> 1) { r += 1; }
479 511
480 return r; 512 return r;
513#endif
481 } 514 }
482 515
483 ecb_function_ ecb_const int ecb_ld64 (uint64_t x); 516 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
484 ecb_function_ ecb_const int ecb_ld64 (uint64_t x) 517 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
485 { 518 {
519#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
520 unsigned long r;
521 _BitScanReverse64 (&r, x);
522 return (int)r;
523#else
486 int r = 0; 524 int r = 0;
487 525
488 if (x >> 32) { x >>= 32; r += 32; } 526 if (x >> 32) { x >>= 32; r += 32; }
489 527
490 return r + ecb_ld32 (x); 528 return r + ecb_ld32 (x);
529#endif
491 } 530 }
492#endif 531#endif
493 532
494ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x); 533ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
495ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); } 534ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
… …
598#endif 637#endif
599 638
600/* try to tell the compiler that some condition is definitely true */ 639/* try to tell the compiler that some condition is definitely true */
601#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0 640#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
602 641
603ecb_inline ecb_const unsigned char ecb_byteorder_helper (void); 642ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
604ecb_inline ecb_const unsigned char 643ecb_inline ecb_const uint32_t
605ecb_byteorder_helper (void) 644ecb_byteorder_helper (void)
606{ 645{
607 /* the union code still generates code under pressure in gcc, */ 646 /* the union code still generates code under pressure in gcc, */
608 /* but less than using pointers, and always seems to */ 647 /* but less than using pointers, and always seems to */
609 /* successfully return a constant. */ 648 /* successfully return a constant. */
610 /* the reason why we have this horrible preprocessor mess */ 649 /* the reason why we have this horrible preprocessor mess */
611 /* is to avoid it in all cases, at least on common architectures */ 650 /* is to avoid it in all cases, at least on common architectures */
612 /* or when using a recent enough gcc version (>= 4.6) */ 651 /* or when using a recent enough gcc version (>= 4.6) */
613#if ((__i386 || __i386__) && !__VOS__) || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64
614 return 0x44;
615#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ 652#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
653 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
654 #define ECB_LITTLE_ENDIAN 1
616 return 0x44; 655 return 0x44332211;
617#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 656#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
657 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
658 #define ECB_BIG_ENDIAN 1
618 return 0x11; 659 return 0x11223344;
619#else 660#else
620 union 661 union
621 { 662 {
663 uint8_t c[4];
622 uint32_t i; 664 uint32_t u;
623 uint8_t c;
624 } u = { 0x11223344 }; 665 } u = { 0x11, 0x22, 0x33, 0x44 };
625 return u.c; 666 return u.u;
626#endif 667#endif
627} 668}
628 669
629ecb_inline ecb_const ecb_bool ecb_big_endian (void); 670ecb_inline ecb_const ecb_bool ecb_big_endian (void);
630ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; } 671ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
631ecb_inline ecb_const ecb_bool ecb_little_endian (void); 672ecb_inline ecb_const ecb_bool ecb_little_endian (void);
632ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; } 673ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
633 674
634#if ECB_GCC_VERSION(3,0) || ECB_C99 675#if ECB_GCC_VERSION(3,0) || ECB_C99
635 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0)) 676 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
636#else 677#else
637 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n))) 678 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
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662 } 703 }
663#else 704#else
664 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0])) 705 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
665#endif 706#endif
666 707
667ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint16_t x); 708ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
668ecb_function_ ecb_const uint32_t 709ecb_function_ ecb_const uint32_t
669ecb_binary16_to_binary32 (uint16_t x) 710ecb_binary16_to_binary32 (uint32_t x)
670{ 711{
671 unsigned int s = (x & 0x8000) << (31 - 15); 712 unsigned int s = (x & 0x8000) << (31 - 15);
672 int e = (x >> 10) & 0x001f; 713 int e = (x >> 10) & 0x001f;
673 unsigned int m = x & 0x03ff; 714 unsigned int m = x & 0x03ff;
674 715
… …
724 765
725 /* handle large numbers and infinity */ 766 /* handle large numbers and infinity */
726 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000)) 767 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
727 return s | 0x7c00; 768 return s | 0x7c00;
728 769
729 /* handle zero and subnormals */ 770 /* handle zero, subnormals and small numbers */
730 if (ecb_expect_true (x < 0x38800000)) 771 if (ecb_expect_true (x < 0x38800000))
731 { 772 {
732 /* zero */ 773 /* zero */
733 if (ecb_expect_true (!x)) 774 if (ecb_expect_true (!x))
734 return s; 775 return s;
735 776
736 /* handle subnormals */ 777 /* handle subnormals */
778
779 /* too small, will be zero */
780 if (e < (14 - 24)) /* might not be sharp, but is good enough */
781 return s;
737 782
738 m |= 0x00800000; /* make implicit bit explicit */ 783 m |= 0x00800000; /* make implicit bit explicit */
739 784
740 /* very tricky - we need to round to the nearest e (+10) bit value */ 785 /* very tricky - we need to round to the nearest e (+10) bit value */
741 { 786 {

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