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Diffstat (limited to 'StdLib/LibC/Math/math_private.h')
| -rw-r--r-- | StdLib/LibC/Math/math_private.h | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/StdLib/LibC/Math/math_private.h b/StdLib/LibC/Math/math_private.h new file mode 100644 index 0000000000..0aed7e7950 --- /dev/null +++ b/StdLib/LibC/Math/math_private.h @@ -0,0 +1,229 @@ +/*
+ * ====================================================
+ * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
+ *
+ * Developed at SunPro, a Sun Microsystems, Inc. business.
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice
+ * is preserved.
+ * ====================================================
+ */
+
+/*
+ * from: @(#)fdlibm.h 5.1 93/09/24
+ * $NetBSD: math_private.h,v 1.12 2005/07/21 12:55:58 christos Exp $
+ */
+
+#ifndef _MATH_PRIVATE_H_
+#define _MATH_PRIVATE_H_
+
+#include <sys/types.h>
+
+/* The original fdlibm code used statements like:
+ n0 = ((*(int*)&one)>>29)^1; * index of high word *
+ ix0 = *(n0+(int*)&x); * high word of x *
+ ix1 = *((1-n0)+(int*)&x); * low word of x *
+ to dig two 32 bit words out of the 64 bit IEEE floating point
+ value. That is non-ANSI, and, moreover, the gcc instruction
+ scheduler gets it wrong. We instead use the following macros.
+ Unlike the original code, we determine the endianness at compile
+ time, not at run time; I don't see much benefit to selecting
+ endianness at run time. */
+
+/* A union which permits us to convert between a double and two 32 bit
+ ints. */
+
+/*
+ * The ARM ports are little endian except for the FPA word order which is
+ * big endian.
+ */
+
+#if (BYTE_ORDER == BIG_ENDIAN) || (defined(__arm__) && !defined(__VFP_FP__))
+
+typedef union
+{
+ double value;
+ struct
+ {
+ u_int32_t msw;
+ u_int32_t lsw;
+ } parts;
+} ieee_double_shape_type;
+
+#endif
+
+#if (BYTE_ORDER == LITTLE_ENDIAN) && \
+ !(defined(__arm__) && !defined(__VFP_FP__))
+
+typedef union
+{
+ double value;
+ struct
+ {
+ u_int32_t lsw;
+ u_int32_t msw;
+ } parts;
+} ieee_double_shape_type;
+
+#endif
+
+/* Get two 32 bit ints from a double. */
+
+#define EXTRACT_WORDS(ix0,ix1,d) \
+do { \
+ ieee_double_shape_type ew_u; \
+ ew_u.value = (d); \
+ (ix0) = ew_u.parts.msw; \
+ (ix1) = ew_u.parts.lsw; \
+} while (0)
+
+/* Get the more significant 32 bit int from a double. */
+
+#define GET_HIGH_WORD(i,d) \
+do { \
+ ieee_double_shape_type gh_u; \
+ gh_u.value = (d); \
+ (i) = gh_u.parts.msw; \
+} while (0)
+
+/* Get the less significant 32 bit int from a double. */
+
+#define GET_LOW_WORD(i,d) \
+do { \
+ ieee_double_shape_type gl_u; \
+ gl_u.value = (d); \
+ (i) = gl_u.parts.lsw; \
+} while (0)
+
+/* Set a double from two 32 bit ints. */
+
+#define INSERT_WORDS(d,ix0,ix1) \
+do { \
+ ieee_double_shape_type iw_u; \
+ iw_u.parts.msw = (ix0); \
+ iw_u.parts.lsw = (ix1); \
+ (d) = iw_u.value; \
+} while (0)
+
+/* Set the more significant 32 bits of a double from an int. */
+
+#define SET_HIGH_WORD(d,v) \
+do { \
+ ieee_double_shape_type sh_u; \
+ sh_u.value = (d); \
+ sh_u.parts.msw = (v); \
+ (d) = sh_u.value; \
+} while (0)
+
+/* Set the less significant 32 bits of a double from an int. */
+
+#define SET_LOW_WORD(d,v) \
+do { \
+ ieee_double_shape_type sl_u; \
+ sl_u.value = (d); \
+ sl_u.parts.lsw = (v); \
+ (d) = sl_u.value; \
+} while (0)
+
+/* A union which permits us to convert between a float and a 32 bit
+ int. */
+
+typedef union
+{
+ float value;
+ u_int32_t word;
+} ieee_float_shape_type;
+
+/* Get a 32 bit int from a float. */
+
+#define GET_FLOAT_WORD(i,d) \
+do { \
+ ieee_float_shape_type gf_u; \
+ gf_u.value = (d); \
+ (i) = gf_u.word; \
+} while (0)
+
+/* Set a float from a 32 bit int. */
+
+#define SET_FLOAT_WORD(d,i) \
+do { \
+ ieee_float_shape_type sf_u; \
+ sf_u.word = (i); \
+ (d) = sf_u.value; \
+} while (0)
+
+/* ieee style elementary functions */
+extern double __ieee754_sqrt (double);
+extern double __ieee754_acos (double);
+extern double __ieee754_acosh (double);
+extern double __ieee754_log (double);
+extern double __ieee754_atanh (double);
+extern double __ieee754_asin (double);
+extern double __ieee754_atan2 (double, double);
+extern double __ieee754_exp (double);
+extern double __ieee754_cosh (double);
+extern double __ieee754_fmod (double, double);
+extern double __ieee754_pow (double, double);
+extern double __ieee754_lgamma_r (double, int *);
+extern double __ieee754_gamma_r (double, int *);
+extern double __ieee754_lgamma (double);
+extern double __ieee754_gamma (double);
+extern double __ieee754_log10 (double);
+extern double __ieee754_log2 (double);
+extern double __ieee754_sinh (double);
+extern double __ieee754_hypot (double, double);
+extern double __ieee754_j0 (double);
+extern double __ieee754_j1 (double);
+extern double __ieee754_y0 (double);
+extern double __ieee754_y1 (double);
+extern double __ieee754_jn (int, double);
+extern double __ieee754_yn (int, double);
+extern double __ieee754_remainder (double, double);
+extern int __ieee754_rem_pio2 (double,double*);
+extern double __ieee754_scalb (double, double);
+
+/* fdlibm kernel function */
+extern double __kernel_standard (double, double, int);
+extern double __kernel_sin (double, double, int);
+extern double __kernel_cos (double, double);
+extern double __kernel_tan (double, double, int);
+extern int __kernel_rem_pio2 (double*,double*,int,int,int,const int*);
+
+
+///* ieee style elementary float functions */
+//extern float __ieee754_sqrtf __P((float));
+//extern float __ieee754_acosf __P((float));
+//extern float __ieee754_acoshf __P((float));
+//extern float __ieee754_logf __P((float));
+//extern float __ieee754_atanhf __P((float));
+//extern float __ieee754_asinf __P((float));
+//extern float __ieee754_atan2f __P((float,float));
+//extern float __ieee754_expf __P((float));
+//extern float __ieee754_coshf __P((float));
+//extern float __ieee754_fmodf __P((float,float));
+//extern float __ieee754_powf __P((float,float));
+//extern float __ieee754_lgammaf_r __P((float,int *));
+//extern float __ieee754_gammaf_r __P((float,int *));
+//extern float __ieee754_lgammaf __P((float));
+//extern float __ieee754_gammaf __P((float));
+//extern float __ieee754_log10f __P((float));
+//extern float __ieee754_log2f __P((float));
+//extern float __ieee754_sinhf __P((float));
+//extern float __ieee754_hypotf __P((float,float));
+//extern float __ieee754_j0f __P((float));
+//extern float __ieee754_j1f __P((float));
+//extern float __ieee754_y0f __P((float));
+//extern float __ieee754_y1f __P((float));
+//extern float __ieee754_jnf __P((int,float));
+//extern float __ieee754_ynf __P((int,float));
+//extern float __ieee754_remainderf __P((float,float));
+//extern int __ieee754_rem_pio2f __P((float,float*));
+//extern float __ieee754_scalbf __P((float,float));
+
+///* float versions of fdlibm kernel functions */
+//extern float __kernel_sinf __P((float,float,int));
+//extern float __kernel_cosf __P((float,float));
+//extern float __kernel_tanf __P((float,float,int));
+//extern int __kernel_rem_pio2f __P((float*,float*,int,int,int,const int*));
+
+#endif /* _MATH_PRIVATE_H_ */
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