From 6197ce1a3544f52e881a112ede9679d84fafebf3 Mon Sep 17 00:00:00 2001
From: Christoph Hertzberg <chtz@informatik.uni-bremen.de>
Date: Tue, 6 Apr 2021 16:49:57 +0200
Subject: Replace `-2147483648` by `-0.0f` or `-0.0` constants (this should fix
 #2189). Also, remove unnecessary `pgather` operations.

---
 Eigen/src/LU/arch/InverseSize4.h | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

(limited to 'Eigen')

diff --git a/Eigen/src/LU/arch/InverseSize4.h b/Eigen/src/LU/arch/InverseSize4.h
index df0fe0e7d..5a8d0c114 100644
--- a/Eigen/src/LU/arch/InverseSize4.h
+++ b/Eigen/src/LU/arch/InverseSize4.h
@@ -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();
-- 
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