Trailing-Edge
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PDP-10 Archives
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SRI_NIC_PERM_FS_1_19910112
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c/lib5/pml/pml.h
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/*
* This file gets included with all of the floating point math
* library routines when they are compiled. Note that
* this is the proper place to put machine dependencies
* whenever possible.
*
* It should be pointed out that for simplicity's sake, the
* environment parameters are defined as floating point constants,
* rather than octal or hexadecimal initializations of allocated
* storage areas. This means that the range of allowed numbers
* may not exactly match the hardware's capabilities. For example,
* if the maximum positive double precision floating point number
* is EXACTLY 1.11...E100 and the constant "MAX_POS_DBLF is
* defined to be 1.11E100 then the numbers between 1.11E100 and
* 1.11...E100 are considered to be undefined. For most
* applications, this will cause no problems.
*
* An alternate method is to allocate a global static "double" variable,
* say "max_pos_dblf", and use a union declaration and initialization
* to initialize it with the proper bits for the EXACT maximum value.
* This was not done because the only compilers available to the
* author did not fully support union initialization features.
*
*/
#define PDP10
/*
* PDP10 (DECSYSTEM 20) HARDWARE DEPENDENCIES
*
* ******** W A R N I N G W A R N I N G ********
* The current DEC20 implementation treats double precision
* floats as single precision floats. When true double
* precision is implemented, the flowing floats may have to
* change.
*
* Since the PDP10 compiler has no static variables, and only
* first 5 letters are significant, must use preprocessor
* to avoid name clashes.
*/
#ifdef PDP10
#define MAX_POS_DBLF 1.7014118e38 /* Max positive double float */
#define MIN_POS_DBLF 1.4693680e-39 /* Min positive double float */
#define MAX_NEG_DBLF -1.7014118e38 /* Max negative double float */
#define MIN_NEG_DBLF -1.4693680e-39 /* Min negative double float */
#define MAX_EXPONENT 127 /* Max exponent allowed */
#define RECIP_MIN 5.877471e-39 /* MAX_POS_DBLF >= 1/RECIP_MIN */
#define RECIP_MAX 1.7014118e38 /* MIN_POS_DBLF <= 1/RECIP_MAX */
#define LN_MAXPOSDBL 88.0 /* LN(MAX_POS_DBLF) */
#define LN_MINPOSDBL -89.4 /* LN(MIN_POS_DBLF) */
#define DTANH_MAXARG 16 /* |DTANH(maxarg)| = 1.0 */
#define DSQRT_MPDF 1.304380e19 /* DSQRT(MAX_POS_DBLF) */
#define X6_UNDERFLOWS 3.37174e-7 /* X**6 almost underflows */
#define X16_UNDERFLOWS 3.74063e-3 /* X**16 almost underflows */
#define datan_coeffs qzzz1 /* rename to avoid name clash */
#define dcos_pcoeffs qzzz2 /* rename to avoid name clash */
#define dcos_qcoeffs qzzz3 /* rename to avoid name clash */
#define dln_pcoeffs qzzz4 /* rename to avoid name clash */
#define dln_qcoeffs qzzz5 /* rename to avoid name clash */
#define dsin_pcoeffs qzzz6 /* rename to avoid name clash */
#define dsin_qcoeffs qzzz7 /* rename to avoid name clash */
#endif
/*
* PDP11 HARDWARE DEPENDENCIES
*
*/
#ifdef pdp11
#define MAX_POS_DBLF 1.7014118e38 /* Max positive double float */
#define MIN_POS_DBLF 1.4693680e-39 /* Min positive double float */
#define MAX_NEG_DBLF -1.7014118e38 /* Max negative double float */
#define MIN_NEG_DBLF -1.4693680e-39 /* Min negative double float */
#define MAX_EXPONENT 127 /* Max exponent allowed */
#define RECIP_MIN 5.877471e-39 /* MAX_POS_DBLF >= 1/RECIP_MIN */
#define RECIP_MAX 1.7014118e38 /* MIN_POS_DBLF <= 1/RECIP_MAX */
#define LN_MAXPOSDBL 88.0 /* LN(MAX_POS_DBLF) */
#define LN_MINPOSDBL -89.4 /* LN(MIN_POS_DBLF) */
#define DTANH_MAXARG 16 /* |DTANH(maxarg)| = 1.0 */
#define DSQRT_MPDF 1.304380e19 /* DSQRT(MAX_POS_DBLF) */
#define X6_UNDERFLOWS 3.37174e-7 /* X**6 almost underflows */
#define X16_UNDERFLOWS 3.74063e-3 /* X**16 almost underflows */
#endif
/*
* VAX11 HARDWARE DEPENDENCIES
*
* Temp: same as pdp11
*/
#ifdef vax
#define MAX_POS_DBLF 1.7014118e38 /* Max positive double float */
#define MIN_POS_DBLF 1.4693680e-39 /* Min positive double float */
#define MAX_NEG_DBLF -1.7014118e38 /* Max negative double float */
#define MIN_NEG_DBLF -1.4693680e-39 /* Min negative double float */
#define MAX_EXPONENT 127 /* Max exponent allowed */
#define RECIP_MIN 5.877471e-39 /* MAX_POS_DBLF >= 1/RECIP_MIN */
#define RECIP_MAX 1.7014118e38 /* MIN_POS_DBLF <= 1/RECIP_MAX */
#define LN_MAXPOSDBL 88.0 /* LN(MAX_POS_DBLF) */
#define LN_MINPOSDBL -89.4 /* LN(MIN_POS_DBLF) */
#define DTANH_MAXARG 16 /* |DTANH(maxarg)| = 1.0 */
#define DSQRT_MPDF 1.304380e19 /* DSQRT(MAX_POS_DBLF) */
#define X6_UNDERFLOWS 3.37174e-7 /* X**6 almost underflows */
#define X16_UNDERFLOWS 3.74063e-3 /* X**16 almost underflows */
#endif
/* Define some commonly used constants */
#define TWOPI 6.2831853071795864769
#define PI 3.1415926535897932384
#define HALFPI 1.5707963267948966192
#define FOURTHPI 0.7853981633974483096
#define SIXTHPI 0.523598776
#define LOG2E 1.4426950408889634073
#define LOG10E 0.4342944819032518276
#define DSQRT2 1.4142135623730950488
#define DSQRT3 1.7320508075688772935
#define LN2 0.6931471805599453094
#define LNSQRT2 0.3465735902799726547
/* Configuration options */
#define MAX_ERRORS 10 /* Limit on number of errors before abort */
/* Function declarations */
extern double dacos();
extern double dacosh(), dasin(), dasinh(), datan(), datan2(), datanh();
extern double dcos(), dcosh(), dexp(), dln(), dlog();
extern double dmax(), dmin(), dpoly(), dscale(), dsign(), dsin();
extern double dsinh(), dsqrt(), dtan(), dtanh(), dxmant();
extern int dxexp();