_mm_maskz_rol_epi32
Classification
AVX-512, Shift, CPUID Test: AVX512F
Header File
Instruction
VPROLD xmm {z}, xmm, imm8
Synopsis
_mm_maskz_rol_epi32(__mmask8 k, __m128i 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 zeromask "k" (elements are zeroed out 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 3
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] := 0
FI
ENDFOR
dst[MAX:128] := 0