source: mainline/uspace/app/pcc/arch/pdp11/macdefs.h@ 48fa501

/*      $Id: macdefs.h,v 1.4 2009/01/24 21:43:49 gmcgarry Exp $ */
/*
 * Copyright (c) 2003 Anders Magnusson (ragge@ludd.luth.se).
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * Machine-dependent defines for both passes.
 */

/*
 * Convert (multi-)character constant to integer.
 */
#define makecc(val,i)   lastcon = i ? (val<<8)|lastcon : val

#define ARGINIT         32      /* # bits above r5 where arguments start */
#define AUTOINIT        64      /* # bits below r5 where automatics start */

/*
 * Storage space requirements
 */
#define SZCHAR          8
#define SZBOOL          8
#define SZINT           16
#define SZFLOAT         32
#define SZDOUBLE        64
#define SZLDOUBLE       64
#define SZLONG          32
#define SZSHORT         16
#define SZLONGLONG      64
#define SZPOINT(t)      16

/*
 * Alignment constraints
 */
#define ALCHAR          8
#define ALBOOL          8
#define ALINT           16
#define ALFLOAT         16
#define ALDOUBLE        16
#define ALLDOUBLE       16
#define ALLONG          16
#define ALLONGLONG      16
#define ALSHORT         16
#define ALPOINT         16
#define ALSTRUCT        16
#define ALSTACK         16 

/*
 * Min/max values.
 */
#define MIN_CHAR        -128
#define MAX_CHAR        127
#define MAX_UCHAR       255
#define MIN_SHORT       -32768
#define MAX_SHORT       32767
#define MAX_USHORT      65535
#define MIN_INT         (-0x7fff-1)
#define MAX_INT         0x7fff
#define MAX_UNSIGNED    0xffff
#define MIN_LONG        (-0x7fffffff-1)
#define MAX_LONG        0x7fffffff
#define MAX_ULONG       0xffffffff
#define MIN_LONGLONG    0x8000000000000000LL
#define MAX_LONGLONG    0x7fffffffffffffffLL
#define MAX_ULONGLONG   0xffffffffffffffffULL

/* Default char is signed */
#undef  CHAR_UNSIGNED
#define BOOL_TYPE       CHAR    /* what used to store _Bool */

/*
 * Use large-enough types.
 */
typedef long long CONSZ;
typedef unsigned long long U_CONSZ;
typedef long long OFFSZ;

#define CONFMT  "%lld"          /* format for printing constants */
#define LABFMT  "L%d"           /* format for printing labels */
#ifdef LANG_F77
#define BLANKCOMMON "_BLNK_"
#define MSKIREG  (M(TYSHORT)|M(TYLONG))
#define TYIREG TYLONG
#define FSZLENG  FSZLONG
#define AUTOREG EBP
#define ARGREG  EBP
#define ARGOFFSET 8
#endif

#define BACKAUTO                /* stack grows negatively for automatics */
#define BACKTEMP                /* stack grows negatively for temporaries */

#undef  FIELDOPS                /* no bit-field instructions */
#define RTOLBYTES               /* bytes are numbered right to left */

#define ENUMSIZE(high,low) INT  /* enums are always stored in full int */

/* Definitions mostly used in pass2 */

#define BYTEOFF(x)      ((x)&01)
#define wdal(k)         (BYTEOFF(k)==0)
#define BITOOR(x)       (x)     /* bit offset to oreg offset XXX die! */

#define STOARG(p)
#define STOFARG(p)
#define STOSTARG(p)
#define genfcall(a,b)   gencall(a,b)

#define FINDMOPS        /* pdp11 has instructions that modifies memory */

#define szty(t) ((t) == DOUBLE || (t) == LONGLONG || (t) == ULONGLONG ? 4 : \
        (t) == FLOAT || (t) == LONG || (t) == ULONG ? 2 : 1)

/*
 * The pdp11 has 3 register classes, 16-bit, 32-bit and floats.
 * Class membership and overlaps are defined in the macros RSTATUS
 * and ROVERLAP below.
 *
 * The classes used on pdp11 are:
 *      A - 16-bit
 *      B - 32-bit (concatenated 16-bit)
 *      C - floating point
 */
#define R0      000     /* Scratch and return register */
#define R1      001     /* Scratch and secondary return register */
#define R2      002     /* Scratch register */
#define R3      003     /* Scratch register */
#define R4      004     /* Scratch register */
#define R5      005     /* Frame pointer */
#define SP      006     /* Stack pointer */
#define PC      007     /* Program counter */

#define R01     010
#define R12     011
#define R23     012
#define R34     013

#define FR0     020
#define FR1     021
#define FR2     022
#define FR3     023
#define FR4     024
#define FR5     025
#define FR6     026
#define FR7     027

#define MAXREGS 030     /* 24 registers */

#define RSTATUS \
        SAREG|TEMPREG, SAREG|TEMPREG, SAREG, SAREG, SAREG, 0, 0, 0, \
        SBREG, SBREG, SBREG, SBREG, 0, 0, 0, 0,         \
        SCREG, SCREG, SCREG, SCREG, 0, 0, 0, 0

#define ROVERLAP \
        /* 8 basic registers */\
        { R01, -1 },            \
        { R01, R12, -1 },       \
        { R12, R23, -1 },       \
        { R23, R34, -1 },       \
        { R34, -1 },            \
        { -1 },                 \
        { -1 },                 \
        { -1 },                 \
\
        /* 4 long registers */\
        { R0, R1, R12, -1 },            \
        { R1, R2, R01, R23, -1 },               \
        { R2, R3, R12, R34, -1 },               \
        { R3, R4, R23, -1 },            \
        { -1 },                 \
        { -1 },                 \
        { -1 },                 \
        { -1 },                 \
\
        /* The fp registers do not overlap with anything */\
        { -1 },\
        { -1 },\
        { -1 },\
        { -1 },\
        { -1 },\
        { -1 },\
        { -1 },\
        { -1 },


/* Return a register class based on the type of the node */

#define PCLASS(p) (p->n_type < LONG || p->n_type > BTMASK ? SAREG : \
                  (p->n_type == LONG || p->n_type == ULONG ? SBREG : SCREG))

#define NUMCLASS        3       /* highest number of reg classes used */

int COLORMAP(int c, int *r);
#define GCLASS(x) (x < 8 ? CLASSA : x < 16 ? CLASSB : CLASSC)
#define DECRA(x,y)      (((x) >> (y*5)) & 31)   /* decode encoded regs */
#define ENCRD(x)        (x)             /* Encode dest reg in n_reg */
#define ENCRA1(x)       ((x) << 5)      /* A1 */
#define ENCRA2(x)       ((x) << 10)     /* A2 */
#define ENCRA(x,y)      ((x) << (5+y*5))        /* encode regs in int */
#define RETREG(x)       ((x) == LONG || (x) == ULONG ? R01 : \
        (x) == FLOAT || (x) == DOUBLE ? FR0 : R0)

//#define R2REGS        1       /* permit double indexing */

/* XXX - to die */
#define FPREG   R5      /* frame pointer */
#define STKREG  SP      /* stack pointer */

/* A bunch of specials to make life easier for pdp11 */
#define SANDSCON        (MAXSPECIAL+1)
#define SINCB           (MAXSPECIAL+2)  /* post-increment */
#define SINCW           (MAXSPECIAL+3)  /* post-increment */
#define SARGSUB         (MAXSPECIAL+4)  /* arg pointer to array */
#define SARGINC         (MAXSPECIAL+5)  /* post-increment arg */