_mm256_maskz_fixupimm_pd
Classification
AVX-512, Miscellaneous, CPUID Test: AVX512F
Header File
immintrin.h
Instruction
VFIXUPIMMPD ymm {z}, ymm, ymm, imm8
Synopsis
 _mm256_maskz_fixupimm_pd(__mmask8 k, __m256d a, __m256d b, __m256i c, int imm8);
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 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[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 3
	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] := 0
	FI
ENDFOR
dst[MAX:256] := 0