VGETMANTPD—Extract Float64 Vector of Normalized Mantissas from Float64 VectorInstruction Operand EncodingDescriptionConvert double-precision floating values in the source operand (the second operand) to DP FP values with the mantissa normalization and sign control specified by the imm8 byte, see Figure5-15. The converted results are written to the destination operand (the first operand) using writemask k1. The normalized mantissa is specified by interv (imm8[1:0]) and the sign control (sc) is specified by bits 3:2 of the immediate byte. The destination operand is a ZMM/YMM/XMM register updated under the writemask. The source operand can be a ZMM/YMM/XMM register, a 512/256/128-bit memory location, or a 512/256/128-bit vector broadcasted from a 64-bit memory location.For each input DP FP value x, The conversion operation is:GetMant(x) = ±2k|x.significand|where:1 <= |x.significand| < 2Unbiased exponent k can be either 0 or -1, depending on the interval range defined by interv, the range of the significand and whether the exponent of the source is even or odd. The sign of the final result is determined by sc and the source sign. The encoded value of imm8[1:0] and sign control are shown in Figure5-15.Opcode/InstructionOp/En64/32 bit Mode SupportCPUID Feature FlagDescriptionEVEX.128.66.0F3A.W1 26 /r ibVGETMANTPD xmm1 {k1}{z}, xmm2/m128/m64bcst, imm8AV/VAVX512VLAVX512FGet Normalized Mantissa from float64 vector xmm2/m128/m64bcst and store the result in xmm1, using imm8 for sign control and mantissa interval normalization, under writemask.EVEX.256.66.0F3A.W1 26 /r ibVGETMANTPD ymm1 {k1}{z}, ymm2/m256/m64bcst, imm8AV/VAVX512VLAVX512FGet Normalized Mantissa from float64 vector ymm2/m256/m64bcst and store the result in ymm1, using imm8 for sign control and mantissa interval normalization, under writemask.EVEX.512.66.0F3A.W1 26 /r ibVGETMANTPD zmm1 {k1}{z}, zmm2/m512/m64bcst{sae}, imm8AV/VAVX512FGet Normalized Mantissa from float64 vector zmm2/m512/m64bcst and store the result in zmm1, using imm8 for sign control and mantissa interval normalization, under writemask.Op/EnTuple TypeOperand 1Operand 2Operand 3Operand 4AFullModRM:reg (w)ModRM:r/m (r)Imm8NAFigure 5-15. Imm8 Controls for VGETMANTPD/SD/PS/SS70246531Normaiization IntervalMust Be ZeroImm8[3:2] = 00b : sign(SRC)Sign Control (SC)Imm8[3:2] = 01b : 0Imm8[3] = 1b : qNan_Indefinite if sign(SRC) != 0, regardless of imm8[2].Imm8[1:0] = 00b : Interval is [ 1, 2)Imm8[1:0] = 01b : Interval is [1/2, 2)Imm8[1:0] = 10b : Interval is [ 1/2, 1)Imm8[1:0] = 11b : Interval is [3/4, 3/2)imm8
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