Add the polynomial used by exp

src/,,config_testing_38K.s

@@ -97,7 +97,7 @@
 ; --- Software features
 
 ;; #CONFIG# PANIC_SCREEN               YES
-;; #CONFIG# DOS_WEDGE                  YES
+;; #CONFIG# DOS_WEDGE                  NO
 ;; #CONFIG# TAPE_WEDGE                 YES
 ;; #CONFIG# TAPE_HEAD_ALIGN            NO
 ;; #CONFIG# BCD_SAFE_INTERRUPTS        YES

src/basic/math/poly_exp.s

@@ -0,0 +1,19 @@
+;; #LAYOUT# STD *       #TAKE
+;; #LAYOUT# X16 BASIC_0 #TAKE-OFFSET 2000
+;; #LAYOUT# *  BASIC_0  #TAKE
+;; #LAYOUT# *   *       #IGNORE
+
+; Polynomial for the exponential function
+
+poly_exp:
+
+    !byte $07                          ; series length - 1
+
+    +PUT_CONST_POLY_EXP_1
+    +PUT_CONST_POLY_EXP_2
+    +PUT_CONST_POLY_EXP_3
+    +PUT_CONST_POLY_EXP_4
+    +PUT_CONST_POLY_EXP_5
+    +PUT_CONST_POLY_EXP_6
+    +PUT_CONST_POLY_EXP_7
+    +PUT_CONST_POLY_EXP_8

strings/077134583E5674167EB31B772FEEE3857A1D841C2A7C6359580A7E75FDE7C680317218108100000000

@@ -0,0 +1 @@
+This is the polyonmial for the exponential function. According to https://www.c64-wiki.com/wiki/POLY1 this was most likely taken from the book "Computer Approximations" by John Fraser Hart et al. (ISBN 0-88275-642-7). This is then a well known polynomial.

tools/generate_constants.cc

@@ -67,6 +67,17 @@ std::vector<ConstEntry> GLOBAL_constants =
 	ConstEntry( "POLY_SIN_4",  0.00833332926445715285723741015926085083  ),
 	ConstEntry( "POLY_SIN_5", -0.166666665414391662957238076832950332    ),
 	ConstEntry( "POLY_SIN_6",  0.99999999988985190065414932682350994     ),
+
+	// Constants for exp approximation, taken from https://www.c64-wiki.com/wiki/POLY1
+	// original source is probably "Computer Approximations" by John Fraser Hart et al. (ISBN 0-88275-642-7)
+	ConstEntry( "POLY_EXP_1", 2.1498763701e-5 ),
+	ConstEntry( "POLY_EXP_2", 1.4352314037e-4 ),
+	ConstEntry( "POLY_EXP_3", 1.3422634825e-3 ),
+	ConstEntry( "POLY_EXP_4", 9.6140170135e-3 ),
+	ConstEntry( "POLY_EXP_5", 5.5505126860e-2 ),
+	ConstEntry( "POLY_EXP_6", 0.24022638460   ),
+	ConstEntry( "POLY_EXP_7", 0.69314718618   ),
+	ConstEntry( "POLY_EXP_8", 1.0             ),
 };
 
 //