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C166 User's Guide

C166 Introduction Compiling Programs Language Extensions Preprocessor Advanced Programming Error Messages Library Reference Library Files Source Code Standard Types jmp_buf ptrdiff_t size_t va_list wchar_t Macros HARRAY HVAR MARRAY MVAR XARRAY XVAR Routines By Category Buffer Manipulation Routines Character Routines Data Conversion Routines Intrinsic Routines Math Routines Memory Allocation Routines Stream I/O Routines String Routines Variable Length Argument Routines Miscellaneous Routines Include Files SFR Definitions absacc.h assert.h ctype.h float.h intrins.h limits.h math.h membox.h setjmp.h stdarg.h stddef.h stdio.h stdlib.h string.h Reference _alloc_boxf _alloc_boxh _alloc_boxn _atomic_ _bfld_ _calloc_boxf _calloc_boxh _calloc_boxn _chkdouble_ _chkfloat_ _crol_ _cror_ _diswdt_ _einit_ _endatomic_ _free_boxf _free_boxh _free_boxn _getkey _idle_ _init_boxf _init_boxh _init_boxn _irol_ _iror_ _lrol_ _lror_ _nop_ _pop_ _prior_ _priord_ _push_ _pwrdn_ _sof_ _srvwdt_ _testclear_ _testset_ _tolower _toupper _trap_ abs acos asin assert atan atan2 atof atoi atol calloc calloc_b ceil cos cosh exp fabs floor fmemccpy fmemchr fmemcmp fmemcpy fmemmove fmemset fmod free free_b fstrcat fstrchr fstrcmp fstrcpy fstrcspn fstrlen fstrncat fstrncmp fstrncpy fstrpbrk fstrpos fstrrchr fstrrpbrk fstrrpos fstrspn getchar gets hmemcmp hmemcpy hstrcmp hstrcpy init_mempool init_mempool_b isalnum isalpha iscntrl isdigit isgraph islower isprint ispunct isspace isupper isxdigit labs log log10 longjmp malloc malloc_b memccpy memchr memcmp memcpy memmove memset modf offsetof pow printf putchar puts rand realloc realloc_b scanf setjmp sin sinh sprintf sqrt srand sscanf strcat strchr strcmp strcpy strcspn strlen strncat strncmp strncpy strpbrk strpos strrchr strrpbrk strrpos strspn strstr strtod strtol strtoul tan tanh toascii toint tolower toupper ungetchar va_arg va_end va_start vprintf vsprintf xcalloc xfree xinit_mempool xmalloc xmemccpy xmemchr xmemcmp xmemcpy xmemmove xmemset xrealloc xstrcmp xstrcpy xstrlen xstrncpy Appendix

Intrinsic Routines

Routine Attributes Description
_atomic_ intrinsic, reentrant Inserts an ATOMIC assembler instruction.
_bfld_ intrinsic, reentrant Inserts a BFLDL and/or BFLDH assembler instruction.
_chkdouble_ intrinsic, reentrant Checks the status of a 64-bit floating-point number.
_chkfloat_ intrinsic, reentrant Checks the status of a 32-bit floating-point number.
_crol_ intrinsic, reentrant Rotates an unsigned char left a specified number of bits.
_cror_ intrinsic, reentrant Rotates an unsigned char right a specified number of bits.
_einit_ intrinsic, reentrant Inserts an EINIT assembler instruction.
_endatomic_ intrinsic, reentrant Checks the range of the ATOMIC instruction.
_idle_ intrinsic, reentrant Inserts an IDLE assembler instruction.
_irol_ intrinsic, reentrant Rotates an unsigned int left a specified number of bits.
_iror_ intrinsic, reentrant Rotates an unsigned int right a specified number of bits.
_lrol_ intrinsic, reentrant Rotates an unsigned long left a specified number of bits.
_lror_ intrinsic, reentrant Rotates an unsigned long right a specified number of bits.
_nop_ intrinsic, reentrant Inserts a NOP assembler instruction.
_pop_ intrinsic, reentrant Pops and returns a 16-bit value from the system stack using the POP assembler instruction.
_prior_ intrinsic, reentrant Uses the PRIOR instruction to calculate the number of single bit shifts required to normalize a 16-bit value.
_priord_ intrinsic, reentrant Uses the PRIOR instruction to calculate the number of single bit shifts required to normalize a 32-bit value.
_pwrdn_ intrinsic, reentrant Inserts a PWRDN assembler instruction.
_push_ intrinsic, reentrant Pushes a 16-bit value onto the system stack using the PUSH assembler instruction.
_sof_ intrinsic, reentrant Generates the segment-offset value of an address for PEC transfers.
_srvwdt_ intrinsic, reentrant Inserts a SRVWDT assembler instruction which services the watchdog timer.
_testclear_ intrinsic, reentrant Inserts a JBC instruction to test the value of a bit for 1 and clear it to 0 in a single, atomic instruction.
_testset_ intrinsic, reentrant Inserts a JNBS instruction to test the value of a bit for 0 and set it to 1 in a single, atomic instruction.
_trap_ intrinsic, reentrant Inserts a TRAP or SRST assembler instruction.

The C166 Compiler supports a number of intrinsic library routines all of which are defined in the intrins.h include file. Code is generated inline for most intrinsic routines, however, some routines are implemented as functions to save code space.

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