Upgrade to softfloat3e.

This should solve licensing problems as well.

src/cpu/softfloat3e/fpu_constant.h

@@ -0,0 +1,82 @@
+/*============================================================================
+This source file is an extension to the SoftFloat IEC/IEEE Floating-point
+Arithmetic Package, Release 2b, written for Bochs (x86 achitecture simulator)
+floating point emulation.
+
+THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE.  Although reasonable effort has
+been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT TIMES
+RESULT IN INCORRECT BEHAVIOR.  USE OF THIS SOFTWARE IS RESTRICTED TO PERSONS
+AND ORGANIZATIONS WHO CAN AND WILL TAKE FULL RESPONSIBILITY FOR ALL LOSSES,
+COSTS, OR OTHER PROBLEMS THEY INCUR DUE TO THE SOFTWARE, AND WHO FURTHERMORE
+EFFECTIVELY INDEMNIFY JOHN HAUSER AND THE INTERNATIONAL COMPUTER SCIENCE
+INSTITUTE (possibly via similar legal warning) AGAINST ALL LOSSES, COSTS, OR
+OTHER PROBLEMS INCURRED BY THEIR CUSTOMERS AND CLIENTS DUE TO THE SOFTWARE.
+
+Derivative works are acceptable, even for commercial purposes, so long as
+(1) the source code for the derivative work includes prominent notice that
+the work is derivative, and (2) the source code includes prominent notice with
+these four paragraphs for those parts of this code that are retained.
+=============================================================================*/
+
+#ifndef _FPU_CONSTANTS_H_
+#define _FPU_CONSTANTS_H_
+
+#include "config.h"
+
+// Pentium CPU uses only 68-bit precision M_PI approximation
+// #define BETTER_THAN_PENTIUM
+
+/*============================================================================
+ * Written for Bochs (x86 achitecture simulator) by
+ *            Stanislav Shwartsman [sshwarts at sourceforge net]
+ * ==========================================================================*/
+
+//////////////////////////////
+// PI, PI/2, PI/4 constants
+//////////////////////////////
+
+#define FLOATX80_PI_EXP  (0x4000)
+
+// 128-bit PI fraction
+#ifdef BETTER_THAN_PENTIUM
+#define FLOAT_PI_HI (BX_CONST64(0xc90fdaa22168c234))
+#define FLOAT_PI_LO (BX_CONST64(0xc4c6628b80dc1cd1))
+#else
+#define FLOAT_PI_HI (BX_CONST64(0xc90fdaa22168c234))
+#define FLOAT_PI_LO (BX_CONST64(0xC000000000000000))
+#endif
+
+#define FLOATX80_PI2_EXP  (0x3FFF)
+#define FLOATX80_PI4_EXP  (0x3FFE)
+
+//////////////////////////////
+// 3PI/4 constant
+//////////////////////////////
+
+#define FLOATX80_3PI4_EXP (0x4000)
+
+// 128-bit 3PI/4 fraction
+#ifdef BETTER_THAN_PENTIUM
+#define FLOAT_3PI4_HI (BX_CONST64(0x96cbe3f9990e91a7))
+#define FLOAT_3PI4_LO (BX_CONST64(0x9394c9e8a0a5159c))
+#else
+#define FLOAT_3PI4_HI (BX_CONST64(0x96cbe3f9990e91a7))
+#define FLOAT_3PI4_LO (BX_CONST64(0x9000000000000000))
+#endif
+
+//////////////////////////////
+// 1/LN2 constant
+//////////////////////////////
+
+#define FLOAT_LN2INV_EXP  (0x3FFF)
+
+// 128-bit 1/LN2 fraction
+#ifdef BETTER_THAN_PENTIUM
+#define FLOAT_LN2INV_HI (BX_CONST64(0xb8aa3b295c17f0bb))
+#define FLOAT_LN2INV_LO (BX_CONST64(0xbe87fed0691d3e89))
+#else
+#define FLOAT_LN2INV_HI (BX_CONST64(0xb8aa3b295c17f0bb))
+#define FLOAT_LN2INV_LO (BX_CONST64(0xC000000000000000))
+#endif
+
+#endif