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153 | #endif |
153 | #endif |
154 | |
154 | |
155 | /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */ |
155 | /* 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 |
156 | #if __xlC__ && ECB_CPP |
157 | #include <builtins.h> |
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 */ |
158 | #endif |
162 | #endif |
159 | |
163 | |
160 | #ifndef ECB_MEMORY_FENCE |
164 | #ifndef ECB_MEMORY_FENCE |
161 | #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 |
162 | #if __i386 || __i386__ |
166 | #if __i386 || __i386__ |
… | |
… | |
423 | #else |
427 | #else |
424 | ecb_function_ ecb_const int ecb_ctz32 (uint32_t x); |
428 | ecb_function_ ecb_const int ecb_ctz32 (uint32_t x); |
425 | ecb_function_ ecb_const int |
429 | ecb_function_ ecb_const int |
426 | ecb_ctz32 (uint32_t x) |
430 | ecb_ctz32 (uint32_t x) |
427 | { |
431 | { |
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432 | #if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM) |
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433 | unsigned long r = 0; |
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434 | _BitScanForward (&r, x); |
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435 | return (int)r; |
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436 | #else |
428 | int r = 0; |
437 | int r = 0; |
429 | |
438 | |
430 | x &= ~x + 1; /* this isolates the lowest bit */ |
439 | x &= ~x + 1; /* this isolates the lowest bit */ |
431 | |
440 | |
432 | #if ECB_branchless_on_i386 |
441 | #if ECB_branchless_on_i386 |
… | |
… | |
442 | if (x & 0xff00ff00) r += 8; |
451 | if (x & 0xff00ff00) r += 8; |
443 | if (x & 0xffff0000) r += 16; |
452 | if (x & 0xffff0000) r += 16; |
444 | #endif |
453 | #endif |
445 | |
454 | |
446 | return r; |
455 | return r; |
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456 | #endif |
447 | } |
457 | } |
448 | |
458 | |
449 | ecb_function_ ecb_const int ecb_ctz64 (uint64_t x); |
459 | ecb_function_ ecb_const int ecb_ctz64 (uint64_t x); |
450 | ecb_function_ ecb_const int |
460 | ecb_function_ ecb_const int |
451 | ecb_ctz64 (uint64_t x) |
461 | ecb_ctz64 (uint64_t x) |
452 | { |
462 | { |
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463 | #if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM) |
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464 | unsigned long r = 0; |
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465 | _BitScanForward64 (&r, x); |
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466 | return (int)r; |
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467 | #else |
453 | int shift = x & 0xffffffff ? 0 : 32; |
468 | int shift = x & 0xffffffff ? 0 : 32; |
454 | return ecb_ctz32 (x >> shift) + shift; |
469 | return ecb_ctz32 (x >> shift) + shift; |
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470 | #endif |
455 | } |
471 | } |
456 | |
472 | |
457 | ecb_function_ ecb_const int ecb_popcount32 (uint32_t x); |
473 | ecb_function_ ecb_const int ecb_popcount32 (uint32_t x); |
458 | ecb_function_ ecb_const int |
474 | ecb_function_ ecb_const int |
459 | ecb_popcount32 (uint32_t x) |
475 | ecb_popcount32 (uint32_t x) |
… | |
… | |
467 | } |
483 | } |
468 | |
484 | |
469 | ecb_function_ ecb_const int ecb_ld32 (uint32_t x); |
485 | ecb_function_ ecb_const int ecb_ld32 (uint32_t x); |
470 | ecb_function_ ecb_const int ecb_ld32 (uint32_t x) |
486 | ecb_function_ ecb_const int ecb_ld32 (uint32_t x) |
471 | { |
487 | { |
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488 | #if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM) |
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489 | unsigned long r = 0; |
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490 | _BitScanReverse (&r, x); |
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491 | return (int)r; |
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492 | #else |
472 | int r = 0; |
493 | int r = 0; |
473 | |
494 | |
474 | if (x >> 16) { x >>= 16; r += 16; } |
495 | if (x >> 16) { x >>= 16; r += 16; } |
475 | if (x >> 8) { x >>= 8; r += 8; } |
496 | if (x >> 8) { x >>= 8; r += 8; } |
476 | if (x >> 4) { x >>= 4; r += 4; } |
497 | if (x >> 4) { x >>= 4; r += 4; } |
477 | if (x >> 2) { x >>= 2; r += 2; } |
498 | if (x >> 2) { x >>= 2; r += 2; } |
478 | if (x >> 1) { r += 1; } |
499 | if (x >> 1) { r += 1; } |
479 | |
500 | |
480 | return r; |
501 | return r; |
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502 | #endif |
481 | } |
503 | } |
482 | |
504 | |
483 | ecb_function_ ecb_const int ecb_ld64 (uint64_t x); |
505 | ecb_function_ ecb_const int ecb_ld64 (uint64_t x); |
484 | ecb_function_ ecb_const int ecb_ld64 (uint64_t x) |
506 | ecb_function_ ecb_const int ecb_ld64 (uint64_t x) |
485 | { |
507 | { |
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508 | #if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM) |
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509 | unsigned long r = 0; |
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510 | _BitScanReverse64 (&r, x); |
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511 | return (int)r; |
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512 | #else |
486 | int r = 0; |
513 | int r = 0; |
487 | |
514 | |
488 | if (x >> 32) { x >>= 32; r += 32; } |
515 | if (x >> 32) { x >>= 32; r += 32; } |
489 | |
516 | |
490 | return r + ecb_ld32 (x); |
517 | return r + ecb_ld32 (x); |
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518 | #endif |
491 | } |
519 | } |
492 | #endif |
520 | #endif |
493 | |
521 | |
494 | ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x); |
522 | ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x); |
495 | ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); } |
523 | ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); } |