_mm256_maskz_fixupimm_ps
Classification
AVX-512, Miscellaneous, CPUID Test: AVX512F
Header File
Instruction
VFIXUPIMMPS ymm {z}, ymm, ymm, imm8
Synopsis
_mm256_maskz_fixupimm_ps(__mmask8 k, __m256 a, __m256 b, __m256i c, int imm8);
Description
Fix up packed single-precision (32-bit) floating-point elements in "a" and "b" using packed 32-bit integers in "c", and store the results in "dst" using zeromask "k" (elements are zeroed out when the corresponding mask bit is not set). "imm8" is used to set the required flags reporting.
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[31:0], src2[31:0], src3[31:0], imm8[7:0]) {
tsrc[31:0] := ((src2[30:23] == 0) AND (MXCSR.DAZ == 1)) ? 0.0 : src2[31:0]
CASE(tsrc[31:0]) 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[31:0] := src1[31:0]
1 : dest[31:0] := tsrc[31:0]
2 : dest[31:0] := QNaN(tsrc[31:0])
3 : dest[31:0] := QNAN_Indefinite
4 : dest[31:0] := -INF
5 : dest[31:0] := +INF
6 : dest[31:0] := tsrc.sign? -INF : +INF
7 : dest[31:0] := -0
8 : dest[31:0] := +0
9 : dest[31:0] := -1
10: dest[31:0] := +1
11: dest[31:0] := 1/2
12: dest[31:0] := 90.0
13: dest[31:0] := PI/2
14: dest[31:0] := MAX_FLOAT
15: dest[31:0] := -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[31:0]
}
FOR j := 0 to 7
i := j*32
IF k[j]
dst[i+31:i] := FIXUPIMMPD(a[i+31:i], b[i+31:i], c[i+31:i], imm8[7:0])
ELSE
dst[i+31:i] := 0
FI
ENDFOR
dst[MAX:256] := 0