_mm256_maskz_ror_epi64
Classification
AVX-512, Shift, CPUID Test: AVX512F
Header File
Instruction
VPRORQ ymm {z}, ymm, imm8
Synopsis
_mm256_maskz_ror_epi64(__mmask8 k, __m256i a, const int imm8);
Description
Rotate the bits in each packed 64-bit integer in "a" to the right by the number of bits specified in "imm8", and store the results in "dst" using zeromask "k" (elements are zeroed out when the corresponding mask bit is not set).
Operation
DEFINE RIGHT_ROTATE_QWORDS(src, count_src) {
count := count_src % 64
RETURN (src >> count) OR (src << (64 - count))
}
FOR j := 0 to 3
i := j*64
IF k[j]
dst[i+63:i] := RIGHT_ROTATE_QWORDS(a[i+63:i], imm8[7:0])
ELSE
dst[i+63:i] := 0
FI
ENDFOR
dst[MAX:256] := 0