_mm256_mask_rol_epi32
Classification
AVX-512, Shift, CPUID Test: AVX512F
Header File
immintrin.h
Instruction
VPROLD ymm {k}, ymm, imm8
Synopsis
 _mm256_mask_rol_epi32(__m256i src, __mmask8 k, __m256i a, const int imm8);
Description
Rotate the bits in each packed 32-bit integer in "a" to the left by the number of bits specified in "imm8", and store the results in "dst" using writemask "k" (elements are copied from "src" when the corresponding mask bit is not set).
Operation
DEFINE LEFT_ROTATE_DWORDS(src, count_src) {
	count := count_src % 32
	RETURN (src << count) OR (src >> (32 - count))
}
FOR j := 0 to 7
	i := j*32
	IF k[j]
		dst[i+31:i] := LEFT_ROTATE_DWORDS(a[i+31:i], imm8[7:0])
	ELSE
		dst[i+31:i] := src[i+31:i]
	FI
ENDFOR
dst[MAX:256] := 0