_mm_maskz_fixupimm_round_sd
Classification
AVX-512, Miscellaneous, CPUID Test: AVX512F
Header File
Instruction
VFIXUPIMMSD xmm {z}, xmm, xmm, imm8 {sae}
Synopsis
_mm_maskz_fixupimm_round_sd(__mmask8 k, __m128d a, __m128d b, __m128i c, int imm8, int sae);
Description
Fix up the lower double-precision (64-bit) floating-point elements in "a" and "b" using the lower 64-bit integer in "c", store the result in the lower element of "dst" using zeromask "k" (the element is zeroed out when mask bit 0 is not set), and copy the upper element from "a" to the upper element of "dst". "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]
}
IF k[0]
dst[63:0] := FIXUPIMMPD(a[63:0], b[63:0], c[63:0], imm8[7:0])
ELSE
dst[63:0] := 0
FI
dst[127:64] := a[127:64]
dst[MAX:128] := 0