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njuffa has asked 32 questions and find answers to 170 problems.

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njuffa questions

Fast BCD addition
Efficient and accurate computation of the reciprocal of hypot(a,b)
Efficient AVX2 implementation of a 17x17-bit squaring operation with result truncation
Fast implementation of complementary error function with 5-digit accuracy
Optimized 53->32 bit modulo computation on 32-bit processors
Accurate floating-point computation of the sum and difference of two products
Robustly and accurately computing natural logarithm of quotient of two floating-point numbers
Accurate vectorizable implementation of acosf()
Accurate computation of scaled complementary error function, erfcx()
Most accurate way to compute asinhf() from log1pf()?

njuffa answers

tan(x) approximation to double precision on |x| < pi/4
Efficient and accurate computation of the reciprocal of hypot(a,b)
Best non-trigonometric floating point approximation of tanh(x) in 10 instructions or less
What does the following x86 assembly code with the FLDCW instruction do?
Fast lookup of a null nibble in a 64 bit unsigned
Efficiently represent 16777217 as a float
Accurate sqrt(1 + (x/2)^2) + x/2
Standard deviation using CUDA
How to divide a 128-bit dividend by a 64-bit divisor, where the dividend's bits are all 1's, and where I only need the 64 LSBs of the quotient?
Fast implementation of complementary error function with 5-digit accuracy