156 lines
4.1 KiB
C
156 lines
4.1 KiB
C
/*
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Defines and externs of general interest
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*/
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/* $Id$ */
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/********* PRIVATE/static *********/
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#define PRIVATE static /* or not */
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/********* The internal data types ********/
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#define UNSIGNED /* the normal case */
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#ifdef UNSIGNED
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/* The EM pointer is an abstract type and requires explicit conversion*/
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typedef unsigned long ptr; /* pointer to EM address */
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#define p2i(p) (p) /* convert pointer to index */
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#define i2p(p) (ptr)(p) /* convert index to pointer */
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#else /* UNSIGNED */
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typedef char *ptr; /* pointer to EM address */
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#define p2i(p) (long)(p) /* convert pointer to index */
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#define i2p(p) (ptr)(p) /* convert index to pointer */
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#endif /* UNSIGNED */
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/* The EM size is an integer type; a cast suffices */
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typedef long size;
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/********* Mathematical constants ********/
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#define I_MAXU1 255L
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#define I_MAXS1 127L
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#define I_MINS1 (-127L-1L)
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#define I_MAXU2 65535L
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#define I_MAXS2 32767L
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#define I_MINS2 (-32767L-1L)
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#define I_MAXU4 4294967295L
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#define I_MAXS4 2147483647L
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#define I_MINS4 (-2147483647L-1L)
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#define FL_MAXU1 255.0
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#define FL_MAXS1 127.0
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#define FL_MINS1 -128.0
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#define FL_MAXU2 65535.0
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#define FL_MAXS2 32767.0
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#define FL_MINS2 -32768.0
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#define FL_MAXU4 4294967295.0
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#define FL_MAXS4 2147483647.0
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#define FL_MINS4 -2147483648.0
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#define BIT(n) (1L<<(n))
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#define SIGNBIT1 BIT(7) /* Signbit of one byte signed int */
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#define SIGNBIT2 BIT(15) /* Signbit of two byte signed int */
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#define SIGNBIT4 BIT(31) /* Signbit of four byte signed int */
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#define MASK1 0xFF /* To mask one byte */
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#define MASK2 0xFFFF /* To mask two bytes */
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/******** Machine constants ********/
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#define MAX_OFF2 I_MAXS2
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#define MAX_OFF4 I_MAXS4
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/******** EM machine data sizes ********/
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#define FRALIMIT 8L /* Default limit */
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#define LINSIZE 4L /* Fixed size of LIN number */
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/******** EM Machine capacity parameters ********/
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extern size wsize; /* wordsize */
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extern size dwsize; /* double wordsize */
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extern size psize; /* pointersize */
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extern long i_minsw; /* Min. value for signed integer of wsize */
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extern long i_maxsw; /* Max. value for signed integer of wsize */
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extern unsigned long i_maxuw; /* Max. value for unsigned integer of wsize */
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extern long min_off; /* Minimum offset */
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extern long max_off; /* Maximum offset */
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extern ptr max_addr; /* Maximum address */
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extern size wsizem1; /* wordsize - 1 */
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/******** EM program parameters ********/
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extern ptr ML; /* Memory Limit */
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extern ptr HB; /* Heap Base */
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extern ptr DB; /* Procedure Descriptor Base, end of text */
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extern long NProc; /* Number of Procedure Descriptors */
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extern long PreIgnMask; /* Preset Ignore Mask, from command line */
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/******** EM machine registers ********/
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#define UNDEFINED (0)
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#define DEFINED (1)
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extern long PI; /* Procedure Identifier of running proc */
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extern ptr PC; /* Program Counter */
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extern ptr HP; /* Heap Pointer */
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extern ptr SP; /* Stack Pointer */
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extern ptr LB; /* Local Base */
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extern ptr AB; /* Actual Base */
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extern long ES; /* program Exit Status */
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extern int ES_def; /* set iff Exit Status legal */
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#define TR_ABORT (1)
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#define TR_HALT (2)
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#define TR_TRAP (3)
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extern int OnTrap; /* what to do upon trap */
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extern long IgnMask; /* Ignore Mask for traps */
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extern long TrapPI; /* Procedure Identifier of trap routine */
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extern char *FRA; /* Function Return Area */
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extern size FRALimit; /* Function Return Area maximum Size */
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extern size FRASize; /* Function Return Area actual Size */
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extern int FRA_def; /* set iff Function Return Area legal */
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/******** The EM Machine Memory ********/
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extern char *text; /* program text & procedure descriptors */
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extern char *data; /* global data & heap space */
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extern ptr HL; /* Heap Limit */
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extern char *stack; /* stack space and local data */
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extern char *stackML; /* stack + ML, to speed up stack accesses */
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extern ptr SL; /* Stack Limit */
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/********* Global inline functions ********/
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#define btol(c) (long)((c) & MASK1)
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#define btou(c) (unsigned int)((c) & MASK1)
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#define btos(c) (c)
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#define max(i,j) (((i) > (j)) ? (i) : (j))
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#define min(i,j) (((i) < (j)) ? (i) : (j))
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