Changeset 2018 for trunk/lib/bitblock256.hpp
 Timestamp:
 Apr 11, 2012, 4:13:07 PM (7 years ago)
 File:

 1 edited
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trunk/lib/bitblock256.hpp
r1950 r2018 18 18 19 19 union ubitblock { 20 bitblock128_t _256;21 bitblock128_t _128[sizeof(bitblock256_t)/sizeof(bitblock128_t)];22 uint64_t _64[sizeof(bitblock128_t)/sizeof(uint64_t)];23 uint32_t _32[sizeof(bitblock128_t)/sizeof(uint32_t)];24 uint16_t _16[sizeof(bitblock128_t)/sizeof(uint16_t)];25 uint8_t _8[sizeof(bitblock128_t)/sizeof(uint8_t)];20 bitblock256_t _256; 21 bitblock256_t _128[sizeof(bitblock256_t)/sizeof(bitblock256_t)]; 22 uint64_t _64[sizeof(bitblock256_t)/sizeof(uint64_t)]; 23 uint32_t _32[sizeof(bitblock256_t)/sizeof(uint32_t)]; 24 uint16_t _16[sizeof(bitblock256_t)/sizeof(uint16_t)]; 25 uint8_t _8[sizeof(bitblock256_t)/sizeof(uint8_t)]; 26 26 }; 27 27 28 /* The type used to store a carry bit. */ 29 typedef bitblock256_t carry_t; 30 31 static IDISA_ALWAYS_INLINE bitblock256_t carry2bitblock(carry_t carry); 32 static IDISA_ALWAYS_INLINE carry_t bitblock2carry(bitblock256_t carry); 33 34 static IDISA_ALWAYS_INLINE void adc(bitblock256_t x, bitblock256_t y, carry_t & carry, bitblock256_t & sum); 35 static IDISA_ALWAYS_INLINE void sbb(bitblock256_t x, bitblock256_t y, carry_t & borrow, bitblock256_t & difference); 36 static IDISA_ALWAYS_INLINE void advance_with_carry(bitblock256_t cursor, carry_t & carry, bitblock256_t & rslt); 37 38 static IDISA_ALWAYS_INLINE void adc(bitblock256_t x, bitblock256_t y, carry_t carry_in, carry_t & carry_out, bitblock256_t & sum); 39 static IDISA_ALWAYS_INLINE void sbb(bitblock256_t x, bitblock256_t y, carry_t borrow_in, carry_t & borrow_out, bitblock256_t & difference); 40 static IDISA_ALWAYS_INLINE void advance_with_carry(bitblock256_t cursor, carry_t carry_in, carry_t & carry_out, bitblock256_t & rslt); 41 42 static IDISA_ALWAYS_INLINE bitblock256_t convert (uint64_t s); 43 static IDISA_ALWAYS_INLINE uint64_t convert (bitblock256_t v); 44 45 static IDISA_ALWAYS_INLINE bitblock256_t carry2bitblock(carry_t carry) { return carry;} 46 static IDISA_ALWAYS_INLINE carry_t bitblock2carry(bitblock256_t carry) { return carry;} 47 48 IDISA_ALWAYS_INLINE void adc(bitblock256_t x, bitblock256_t y, carry_t carry_in, carry_t & carry_out, bitblock256_t & sum) 49 { 50 bitblock256_t gen = simd_and(x, y); 51 bitblock256_t prop = simd_or(x, y); 52 sum = simd256<256>::add(simd256<256>::add(x, y), carry2bitblock(carry_in)); 53 carry_out = bitblock2carry(simd256<256>::srli<255>(simd_or(gen, simd_andc(prop, sum)))); 54 } 55 56 IDISA_ALWAYS_INLINE void sbb(bitblock256_t x, bitblock256_t y, carry_t borrow_in, carry_t & borrow_out, bitblock256_t & difference) 57 { 58 bitblock256_t gen = simd_andc(y, x); 59 bitblock256_t prop = simd_not(simd_xor(x, y)); 60 difference = simd256<256>::sub(simd256<256>::sub(x, y), carry2bitblock(borrow_in)); 61 borrow_out = bitblock2carry(simd256<256>::srli<255>(simd_or(gen, simd_and(prop, difference)))); 62 } 63 64 IDISA_ALWAYS_INLINE void advance_with_carry(bitblock256_t cursor, carry_t carry_in, carry_t & carry_out, bitblock256_t & rslt) 65 { 66 carry_out = simd256<256>::srli<255>(cursor); 67 rslt = simd_or(simd256<256>::add(cursor, cursor), carry_in); 68 } 69 70 IDISA_ALWAYS_INLINE bitblock256_t convert(uint64_t s) 71 { 72 ubitblock b = {b._256 = simd256<128>::constant<0>()}; // = {0}; 73 b._64[0] = s; 74 return b._256; 75 } 76 77 IDISA_ALWAYS_INLINE uint64_t convert (bitblock256_t v) 78 { 79 return (uint64_t) mvmd256<64>::extract<0>(v); 80 } 81 82 28 83 #endif // BITBLOCK256_HPP_
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