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c++ Programming Glossary: shrWhy is such complex code emitted for dividing a signed integer by a power of two? http://stackoverflow.com/questions/12692111/why-is-such-complex-code-emitted-for-dividing-a-signed-integer-by-a-power-of-two dword ptr __imp__rand 4050C0h 301 return ran 4096 00403946 shr eax 0Ch 302 00403949 ret which is clean and concise and replaced..
Why does changing `const ull` to `const ull&` in function parameter result in performance gain? http://stackoverflow.com/questions/14805641/why-does-changing-const-ull-to-const-ull-in-function-parameter-result-in-pe carry tmp numbits 0.69 400b58 48 c1 ef 20 shr 0x20 rdi tmp imax 1 9.54 400b5c 83 e1 ff and.. carry tmp numbits 0.26 400b4c 48 c1 e9 20 shr 0x20 rcx tmp imax 1 else carry..
modular arithmetics and NTT (finite field DFT) optimizations http://stackoverflow.com/questions/18577076/modular-arithmetics-and-ntt-finite-field-dft-optimizations INTT DWORD src n DWORD arithmetics DWORD shl DWORD a DWORD shr DWORD a modular arithmetics DWORD mod DWORD a DWORD modadd DWORD.. shl DWORD a return a 1 0xFFFFFFFE DWORD fourier_NTT shr DWORD a return a 1 0x7FFFFFFF DWORD fourier_NTT mod DWORD.. bb shl bb for if DWORD a DWORD bb a bb if bb p break bb shr bb return a DWORD fourier_NTT modadd DWORD a DWORD b DWORD..
Looking for sse 128 bit shift operation for non-immediate shift value http://stackoverflow.com/questions/9980801/looking-for-sse-128-bit-shift-operation-for-non-immediate-shift-value xmbshl x n _mm_slli_si128 x n xm 8 n BYTE shift #define xmbshr x n _mm_srli_si128 x n xm 8 n BYTE shift #define xmshl64 x n.. xmshl64 x n _mm_slli_epi64 x n xm.hi n xm.lo n #define xmshr64 x n _mm_srli_epi64 x n xm.hi n xm.lo n #define xmand a b _mm_and_si128.. x n 3 n 15 break #define F5 n case n x xmor xmshl64 x n xmshr64 xmbshl x 8 64 n break #define F6 n case n x xmor xmshl64 xmbshl..
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