_mm512_maskz_scalef_round_pd
Classification
AVX-512, Miscellaneous, CPUID Test: AVX512F
Header File
Instruction
VSCALEFPD zmm {z}, zmm, zmm {er}
Synopsis
_mm512_maskz_scalef_round_pd(__mmask8 k, __m512d a, __m512d b, int rounding);
Description
Scale the packed double-precision (64-bit) floating-point elements in "a" using values from "b", and store the results in "dst" using zeromask "k" (elements are zeroed out when the corresponding mask bit is not set).
[round_note]
Operation
DEFINE SCALE(src1, src2) {
IF (src2 == NaN)
IF (src2 == SNaN)
RETURN QNAN(src2)
FI
ELSE IF (src1 == NaN)
IF (src1 == SNaN)
RETURN QNAN(src1)
FI
IF (src2 != INF)
RETURN QNAN(src1)
FI
ELSE
tmp_src2 := src2
tmp_src1 := src1
IF (IS_DENORMAL(src2) AND MXCSR.DAZ)
tmp_src2 := 0
FI
IF (IS_DENORMAL(src1) AND MXCSR.DAZ)
tmp_src1 := 0
FI
FI
dst[63:0] := tmp_src1[63:0] * POW(2.0, FLOOR(tmp_src2[63:0]))
RETURN dst[63:0]
}
FOR j := 0 to 7
i := j*64
IF k[j]
dst[i+63:i] := SCALE(a[i+63:0], b[i+63:i])
ELSE
dst[i+63:i] := 0
FI
ENDFOR
dst[MAX:512] := 0