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Add shift_left<N> and shift_right<N> coefficient-wise unary Array functions

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This commit is contained in:
Joel Holdsworth
2020-03-19 17:24:06 +00:00
committed by Rasmus Munk Larsen
parent 54aa8fa186
commit 232f904082
9 changed files with 208 additions and 64 deletions
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8
Eigen/src/Core/arch/Default/GenericPacketMathFunctions.h
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@@ -25,7 +25,7 @@ pfrexp_float(const Packet& a, Packet& exponent) {
const Packet cst_126f = pset1<Packet>(126.0f);
const Packet cst_half = pset1<Packet>(0.5f);
const Packet cst_inv_mant_mask = pset1frombits<Packet>(~0x7f800000u);
exponent = psub(pcast<PacketI,Packet>(pshiftright<23>(preinterpret<PacketI>(a))), cst_126f);
exponent = psub(pcast<PacketI,Packet>(plogical_shift_right<23>(preinterpret<PacketI>(a))), cst_126f);
return por(pand(a, cst_inv_mant_mask), cst_half);
}
@@ -36,7 +36,7 @@ pldexp_float(Packet a, Packet exponent)
const Packet cst_127 = pset1<Packet>(127.f);
// return a * 2^exponent
PacketI ei = pcast<Packet,PacketI>(padd(exponent, cst_127));
return pmul(a, preinterpret<Packet>(pshiftleft<23>(ei)));
return pmul(a, preinterpret<Packet>(plogical_shift_left<23>(ei)));
}
// Natural logarithm
@@ -466,8 +466,8 @@ Packet psincos_float(const Packet& _x)
// Compute the sign to apply to the polynomial.
// sin: sign = second_bit(y_int) xor signbit(_x)
// cos: sign = second_bit(y_int+1)
Packet sign_bit = ComputeSine ? pxor(_x, preinterpret<Packet>(pshiftleft<30>(y_int)))
: preinterpret<Packet>(pshiftleft<30>(padd(y_int,csti_1)));
Packet sign_bit = ComputeSine ? pxor(_x, preinterpret<Packet>(plogical_shift_left<30>(y_int)))
: preinterpret<Packet>(plogical_shift_left<30>(padd(y_int,csti_1)));
sign_bit = pand(sign_bit, cst_sign_mask); // clear all but left most bit
// Get the polynomial selection mask from the second bit of y_int