initial pexp() for 32-bit floats, commented out due to vec_cts()

Eigen/src/Core/arch/ZVector/PacketMath.h

diff --git a/Eigen/src/Core/arch/ZVector/PacketMath.h b/Eigen/src/Core/arch/ZVector/PacketMath.h
index 21612ba..a72aea8 100755
--- a/Eigen/src/Core/arch/ZVector/PacketMath.h
+++ b/Eigen/src/Core/arch/ZVector/PacketMath.h
@@ -103,6 +103,12 @@
 #define _EIGEN_DECLARE_CONST_FAST_Packet4f(NAME,X) \
   Packet4f p4f_##NAME = reinterpret_cast<Packet4f>(vec_splat_s32(X))
 
+#define _EIGEN_DECLARE_CONST_Packet4f(NAME,X) \
+  Packet4f p4f_##NAME = pset1<Packet4f>(X)
+
+#define _EIGEN_DECLARE_CONST_Packet4f_FROM_INT(NAME,X) \
+  const Packet4f p4f_##NAME = reinterpret_cast<Packet4f>(pset1<Packet4i>(X))
+
 static _EIGEN_DECLARE_CONST_FAST_Packet4f(ZERO, 0); //{ 0.0, 0.0, 0.0, 0.0}
 static _EIGEN_DECLARE_CONST_FAST_Packet4i(MINUS1,-1); //{ -1, -1, -1, -1}
 static Packet4f p4f_MZERO = { 0x80000000, 0x80000000, 0x80000000, 0x80000000};
@@ -187,7 +193,11 @@
     HasSin  = 0,
     HasCos  = 0,
     HasLog  = 0,
+#if !defined(__ARCH__) || (defined(__ARCH__) && __ARCH__ >= 12)
+    HasExp  = 0,
+#else
     HasExp  = 1,
+#endif
     HasSqrt = 1,
     HasRsqrt = 1,
     HasRound = 1,