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Replace -2147483648 by -0.0f or -0.0 constants (this should fix #2189).

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Also, remove unnecessary `pgather` operations.
This commit is contained in:
Christoph Hertzberg 2021-04-06 16:49:57 +02:00 committed by David Tellenbach
parent 22edb46823
commit 6197ce1a35
1 changed files with 8 additions and 8 deletions
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16
Eigen/src/LU/arch/InverseSize4.h
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@ -141,8 +141,8 @@ struct compute_inverse_size4<Architecture::Target, float, MatrixType, ResultType
iC = psub(iC, pmul(vec4f_swizzle2(A, A, 1, 0, 3, 2), vec4f_swizzle2(DC, DC, 2, 1, 2, 1)));
iC = psub(pmul(B, vec4f_duplane(dC, 0)), iC);
const int bits[4] = {0, -2147483648, -2147483648, 0};
const Packet4f p4f_sign_PNNP = preinterpret<Packet4f, Packet4i>(pgather<int, Packet4i>(bits, static_cast<Eigen::Index>(1)));
const float sign_mask[4] = {0.0f, -0.0f, -0.0f, 0.0f};
const Packet4f p4f_sign_PNNP = pset<Packet4f>(sign_mask);
rd = pxor(rd, p4f_sign_PNNP);
iA = pmul(iA, rd);
iB = pmul(iB, rd);
@ -323,12 +323,12 @@ struct compute_inverse_size4<Architecture::Target, double, MatrixType, ResultTyp
iC1 = psub(pmul(B1, dC), iC1);
iC2 = psub(pmul(B2, dC), iC2);
const int bits1[4] = {0, -2147483648, 0, 0};
const int bits2[4] = {0, 0, 0, -2147483648};
const Packet2d _Sign_NP = preinterpret<Packet2d, Packet4i>(pgather<int, Packet4i>(bits1, static_cast<Eigen::Index>(1)));
const Packet2d _Sign_PN = preinterpret<Packet2d, Packet4i>(pgather<int, Packet4i>(bits2, static_cast<Eigen::Index>(1)));
d1 = pxor(rd, _Sign_PN);
d2 = pxor(rd, _Sign_NP);
const double sign_mask1[2] = {0.0, -0.0};
const double sign_mask2[2] = {-0.0, 0.0};
const Packet2d sign_PN = pset<Packet2d>(sign_mask1);
const Packet2d sign_NP = pset<Packet2d>(sign_mask2);
d1 = pxor(rd, sign_PN);
d2 = pxor(rd, sign_NP);
Index res_stride = result.outerStride();
double *res = result.data();