_mm_mask_ror_epi32
Classification
AVX-512, Shift, CPUID Test: AVX512F
Header File
Instruction
VPRORD xmm {k}, xmm, imm8
Synopsis
_mm_mask_ror_epi32(__m128i src, __mmask8 k, __m128i a, const int imm8);
Description
Rotate the bits in each packed 32-bit integer in "a" to the right 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 RIGHT_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] := RIGHT_ROTATE_DWORDS(a[i+31:i], imm8[7:0])
ELSE
dst[i+31:i] := src[i+31:i]
FI
ENDFOR
dst[MAX:128] := 0