_mm512_mask_fixupimm_round_pd
Classification
AVX-512, Miscellaneous, CPUID Test: AVX512F
Header File
Instruction
VFIXUPIMMPD zmm {k}, zmm, zmm, imm8 {sae}
Synopsis
_mm512_mask_fixupimm_round_pd(__m512d a, __mmask8 k, __m512d b, __m512i c, int imm8, int sae);
Description
Fix up packed double-precision (64-bit) floating-point elements in "a" and "b" using packed 64-bit integers in "c", and store the results in "dst" using writemask "k" (elements are copied from "a" when the corresponding mask bit is not set). "imm8" is used to set the required flags reporting.
[sae_note]
Operation
enum TOKEN_TYPE {
QNAN_TOKEN := 0, \
SNAN_TOKEN := 1, \
ZERO_VALUE_TOKEN := 2, \
ONE_VALUE_TOKEN := 3, \
NEG_INF_TOKEN := 4, \
POS_INF_TOKEN := 5, \
NEG_VALUE_TOKEN := 6, \
POS_VALUE_TOKEN := 7
}
DEFINE FIXUPIMMPD(src1[63:0], src2[63:0], src3[63:0], imm8[7:0]) {
tsrc[63:0] := ((src2[62:52] == 0) AND (MXCSR.DAZ == 1)) ? 0.0 : src2[63:0]
CASE(tsrc[63:0]) OF
QNAN_TOKEN:j := 0
SNAN_TOKEN:j := 1
ZERO_VALUE_TOKEN: j := 2
ONE_VALUE_TOKEN: j := 3
NEG_INF_TOKEN: j := 4
POS_INF_TOKEN: j := 5
NEG_VALUE_TOKEN: j := 6
POS_VALUE_TOKEN: j := 7
ESAC
token_response[3:0] := src3[3+4*j:4*j]
CASE(token_response[3:0]) OF
0 : dest[63:0] := src1[63:0]
1 : dest[63:0] := tsrc[63:0]
2 : dest[63:0] := QNaN(tsrc[63:0])
3 : dest[63:0] := QNAN_Indefinite
4 : dest[63:0] := -INF
5 : dest[63:0] := +INF
6 : dest[63:0] := tsrc.sign? -INF : +INF
7 : dest[63:0] := -0
8 : dest[63:0] := +0
9 : dest[63:0] := -1
10: dest[63:0] := +1
11: dest[63:0] := 1/2
12: dest[63:0] := 90.0
13: dest[63:0] := PI/2
14: dest[63:0] := MAX_FLOAT
15: dest[63:0] := -MAX_FLOAT
ESAC
CASE(tsrc[31:0]) OF
ZERO_VALUE_TOKEN:
IF (imm8[0]) #ZE; FI
ZERO_VALUE_TOKEN:
IF (imm8[1]) #IE; FI
ONE_VALUE_TOKEN:
IF (imm8[2]) #ZE; FI
ONE_VALUE_TOKEN:
IF (imm8[3]) #IE; FI
SNAN_TOKEN:
IF (imm8[4]) #IE; FI
NEG_INF_TOKEN:
IF (imm8[5]) #IE; FI
NEG_VALUE_TOKEN:
IF (imm8[6]) #IE; FI
POS_INF_TOKEN:
IF (imm8[7]) #IE; FI
ESAC
RETURN dest[63:0]
}
FOR j := 0 to 7
i := j*64
IF k[j]
dst[i+63:i] := FIXUPIMMPD(a[i+63:i], b[i+63:i], c[i+63:i], imm8[7:0])
ELSE
dst[i+63:i] := a[i+63:i]
FI
ENDFOR
dst[MAX:512] := 0