X-Git-Url: http://shamusworld.gotdns.org/cgi-bin/gitweb.cgi?p=rmac;a=blobdiff_plain;f=amode.c;h=be5162b28cebab3d79483bbbef6c676ee30ebf04;hp=f0734ea5916dc8f6c86007954062fd162372b1e6;hb=5cd8a4814b805f1ef8ce689423eb5eeba12573c5;hpb=51cff2ac6cb3d097f62b68c51d74fafbce8923f6 diff --git a/amode.c b/amode.c index f0734ea..be5162b 100644 --- a/amode.c +++ b/amode.c @@ -1,7 +1,7 @@ // // RMAC - Reboot's Macro Assembler for the Atari Jaguar Console System // AMODE.C - Addressing Modes -// Copyright (C) 199x Landon Dyer, 2017 Reboot and Friends +// Copyright (C) 199x Landon Dyer, 2011 Reboot and Friends // RMAC derived from MADMAC v1.07 Written by Landon Dyer, 1986 // Source utilised with the kind permission of Landon Dyer // @@ -11,110 +11,188 @@ #include "token.h" #include "expr.h" #include "rmac.h" +#include "procln.h" +#include "sect.h" #define DEF_KW #include "kwtab.h" #define DEF_MN #include "mntab.h" +extern int activecpu; +extern char unsupport[]; + // Address-mode information -int nmodes; // Number of addr'ing modes found -int am0; // Addressing mode -int a0reg; // Register -TOKEN a0expr[EXPRSIZE]; // Expression -VALUE a0exval; // Expression's value -WORD a0exattr; // Expression's attribute -int a0ixreg; // Index register -int a0ixsiz; // Index register size (and scale) -TOKEN a0oexpr[EXPRSIZE]; // Outer displacement expression -VALUE a0oexval; // Outer displacement value -WORD a0oexattr; // Outer displacement attribute -SYM * a0esym; // External symbol involved in expr - -int am1; // Addressing mode -int a1reg; // Register -TOKEN a1expr[EXPRSIZE]; // Expression -VALUE a1exval; // Expression's value -WORD a1exattr; // Expression's attribute -int a1ixreg; // Index register -int a1ixsiz; // Index register size (and scale) -TOKEN a1oexpr[EXPRSIZE]; // Outer displacement expression -VALUE a1oexval; // Outer displacement value -WORD a1oexattr; // Outer displacement attribute -SYM * a1esym; // External symbol involved in expr +int nmodes; // Number of addr'ing modes found +int am0; // Addressing mode +int a0reg; // Register +TOKEN a0expr[EXPRSIZE]; // Expression +VALUE a0exval; // Expression's value +WORD a0exattr; // Expression's attribute +int a0ixreg; // Index register +int a0ixsiz; // Index register size (and scale) +TOKEN a0oexpr[EXPRSIZE]; // Outer displacement expression +VALUE a0oexval; // Outer displacement value +WORD a0oexattr; // Outer displacement attribute +SYM * a0esym; // External symbol involved in expr +TOKEN a0bexpr[EXPRSIZE]; // Base displacement expression +VALUE a0bexval; // Base displacement value +WORD a0bexattr; // Base displacement attribute +WORD a0bsize; // Base displacement size +WORD a0extension; // 020+ extension address word +WORD am0_030; // ea bits for 020+ addressing modes + +int am1; // Addressing mode +int a1reg; // Register +TOKEN a1expr[EXPRSIZE]; // Expression +VALUE a1exval; // Expression's value +WORD a1exattr; // Expression's attribute +int a1ixreg; // Index register +int a1ixsiz; // Index register size (and scale) +TOKEN a1oexpr[EXPRSIZE]; // Outer displacement expression +VALUE a1oexval; // Outer displacement value +WORD a1oexattr; // Outer displacement attribute +SYM * a1esym; // External symbol involved in expr +TOKEN a1bexpr[EXPRSIZE]; // Base displacement expression +VALUE a1bexval; // Base displacement value +WORD a1bexattr; // Base displacement attribute +WORD a1bsize; // Base displacement size +WORD a1extension; // 020+ extension address word +WORD am1_030; // ea bits for 020+ addressing modes +int a2reg; // Register for div.l (68020+) +WORD mulmode; // to distinguish between 32 and 64 bit multiplications (68020+) // // Parse addressing mode // int amode(int acount) { - // Initialize global return values - nmodes = a0reg = a1reg = 0; - am0 = am1 = AM_NONE; - a0expr[0] = a0oexpr[0] = a1expr[0] = a1oexpr[0] = ENDEXPR; - a0exattr = a0oexattr = a1exattr = a1oexattr = 0; - a0esym = a1esym = (SYM *)NULL; - - // If at EOL, then no addr modes at all - if (*tok == EOL) - return 0; - - // Parse first addressing mode - #define AnOK a0ok - #define AMn am0 - #define AnREG a0reg - #define AnIXREG a0ixreg - #define AnIXSIZ a0ixsiz - #define AnEXPR a0expr - #define AnEXVAL a0exval - #define AnEXATTR a0exattr - #define AnOEXPR a0oexpr - #define AnOEXVAL a0oexval - #define AnOEXATTR a0oexattr - #define AnESYM a0esym - #define AMn_IX0 am0_ix0 - #define AMn_IXN am0_ixn - #define CHK_FOR_DISPn CheckForDisp0 - #include "parmode.h" - - // If caller wants only one mode, return just one (ignore comma); - // If there is no second addressing mode (no comma), then return just one anyway. - nmodes = 1; - - if (acount == 0 || *tok != ',') - return 1; - - // Eat the comma - tok++; - - // Parse second addressing mode - #define AnOK a1ok - #define AMn am1 - #define AnREG a1reg - #define AnIXREG a1ixreg - #define AnIXSIZ a1ixsiz - #define AnEXPR a1expr - #define AnEXVAL a1exval - #define AnEXATTR a1exattr - #define AnOEXPR a1oexpr - #define AnOEXVAL a1oexval - #define AnOEXATTR a1oexattr - #define AnESYM a1esym - #define AMn_IX0 am1_ix0 - #define AMn_IXN am1_ixn - #define CHK_FOR_DISPn CheckForDisp1 - #include "parmode.h" - - nmodes = 2; - return 2; - - // Error messages: - badmode: - return error("addressing mode syntax"); - - unmode: - return error("unimplemented addressing mode"); + // Initialize global return values + nmodes = a0reg = a1reg = 0; + am0 = am1 = AM_NONE; + a0expr[0] = a0oexpr[0] = a1expr[0] = a1oexpr[0] = ENDEXPR; + a0exattr = a0oexattr = a1exattr = a1oexattr = 0; + a0esym = a1esym = (SYM *)NULL; + a0bexpr[0]=a1bexpr[0]= ENDEXPR; + a0bexval=a0bsize=a0extension=a1bexval=a1bsize=a1extension=0; + am0_030=am1_030=0; + bfparam1=bfparam2=0; + bf0expr[0]=ENDEXPR; + bf0exattr=0; + bf0esym= (SYM *)NULL; + + // If at EOL, then no addr modes at all + if (*tok == EOL) + return 0; + + // Parse first addressing mode + #define AnOK a0ok + #define AMn am0 + #define AnREG a0reg + #define AnIXREG a0ixreg + #define AnIXSIZ a0ixsiz + #define AnEXPR a0expr + #define AnEXVAL a0exval + #define AnEXATTR a0exattr + #define AnOEXPR a0oexpr + #define AnOEXVAL a0oexval + #define AnOEXATTR a0oexattr + #define AnESYM a0esym + #define AMn_IX0 am0_ix0 + #define AMn_IXN am0_ixn + #define CHK_FOR_DISPn CheckForDisp0 + #define AnBEXPR a0bexpr + #define AnBEXVAL a0bexval + #define AnBEXATTR a0bexattr + #define AnBZISE a0bsize + #define AnEXTEN a0extension + #define AMn_030 am0_030 + #define IS_SUPPRESSEDn IS_SUPPRESSED0 + #define CHECKODn CHECKOD0 + #include "parmode.h" + + // If caller wants only one mode, return just one (ignore comma); + // If there is no second addressing mode (no comma), then return just one anyway. + nmodes = 1; + + if (*tok == '{') + if (check030bf()==ERROR) // it's a bitfield instruction - check the parameters inside the {} block for validity + return ERROR; + + if (acount == 0 || *tok != ',') + return 1; + + // Eat the comma + tok++; + + // Parse second addressing mode + #define AnOK a1ok + #define AMn am1 + #define AnREG a1reg + #define AnIXREG a1ixreg + #define AnIXSIZ a1ixsiz + #define AnEXPR a1expr + #define AnEXVAL a1exval + #define AnEXATTR a1exattr + #define AnOEXPR a1oexpr + #define AnOEXVAL a1oexval + #define AnOEXATTR a1oexattr + #define AnESYM a1esym + #define AMn_IX0 am1_ix0 + #define AMn_IXN am1_ixn + #define CHK_FOR_DISPn CheckForDisp1 + #define AnBEXPR a1bexpr + #define AnBEXVAL a1bexval + #define AnBEXATTR a1bexattr + #define AnBZISE a1bsize + #define AnEXTEN a1extension + #define AMn_030 am1_030 + #define IS_SUPPRESSEDn IS_SUPPRESSED1 + #define CHECKODn CHECKOD1 + #include "parmode.h" + + if (*tok == '{') + if (check030bf()==ERROR) // it's a bitfield instruction - check the parameters inside the {} block for validity + return ERROR; + + // At this point, it is legal for 020+ to have a ':'. For example divu.l d0,d2:d3 + if (*tok == ':') + { + if ((activecpu & (CPU_68020 | CPU_68030 | CPU_68040)) == 0) + return error(unsupport); + // TODO: protect this from combinations like Dx:FPx etc :) + tok++; //eat the colon + if (*tok >= KW_D0 && *tok <= KW_D7) + { + a2reg = (*tok - KW_D0); + mulmode=1<<10; + } + else if (*tok >= KW_FP0&&*tok <= KW_FP7) + { + a2reg = (*tok - KW_FP0); + mulmode=1<<10; + } + else + return error("a data or FPU register must follow a :"); + *tok++; + } + else + { + //If no ':' is present then maybe we have something like divs.l d0,d1 which sould translate to divs.l d0,d1:d1 + a2reg = a1reg; + mulmode=0; + } + + nmodes = 2; + return 2; + + // Error messages: + badmode: + return error("addressing mode syntax"); + + //unmode: + //return error("unimplemented addressing mode"); } @@ -123,51 +201,230 @@ int amode(int acount) // int reglist(WORD * a_rmask) { - static WORD msktab[] = { - 0x0001, 0x0002, 0x0004, 0x0008, - 0x0010, 0x0020, 0x0040, 0x0080, - 0x0100, 0x0200, 0x0400, 0x0800, - 0x1000, 0x2000, 0x4000, 0x8000 - }; + static WORD msktab[] = { + 0x0001, 0x0002, 0x0004, 0x0008, + 0x0010, 0x0020, 0x0040, 0x0080, + 0x0100, 0x0200, 0x0400, 0x0800, + 0x1000, 0x2000, 0x4000, 0x8000 + }; + + WORD rmask = 0; + int r, cnt; + + for(;;) + { + if (*tok >= KW_D0 && *tok <= KW_A7) + r = *tok++ & 15; + else + break; + + if (*tok == '-') + { + tok++; + + if (*tok >= KW_D0 && *tok <= KW_A7) + cnt = *tok++ & 15; + else + return error("register list syntax"); + + if (cnt < r) + return error("register list order"); + + cnt -= r; + } + else + cnt = 0; + + while (cnt-- >= 0) + rmask |= msktab[r++]; + + if (*tok != '/') + break; + + tok++; + } + + *a_rmask = rmask; + + return OK; +} + +// +// Parse FPU register list +// +int fpu_reglist_left(WORD * a_rmask) +{ + static WORD msktab_minus[] = { + 0x0080, 0x0040, 0x0020, 0x0010, + 0x0008, 0x0004, 0x0002, 0x0001 + }; + + WORD rmask = 0; + int r, cnt; + + for(;;) + { + if (*tok >= KW_FP0 && *tok <= KW_FP7) + r = *tok++ & 7; + else + break; + + if (*tok == '-') + { + tok++; + + if (*tok >= KW_FP0 && *tok <= KW_FP7) + cnt = *tok++ & 7; + else + return error("register list syntax"); + + if (cnt < r) + return error("register list order"); + + cnt -= r; + } + else + cnt = 0; + + while (cnt-- >= 0) + rmask |= msktab_minus[r++]; + + if (*tok != '/') + break; + + tok++; + } + + *a_rmask = rmask; + + return OK; +} +int fpu_reglist_right(WORD * a_rmask) +{ + static WORD msktab_plus[] = { + 0x0001, 0x0002, 0x0004, 0x0008, + 0x0010, 0x0020, 0x0040, 0x0080 + }; - WORD rmask = 0; - int r, cnt; + WORD rmask = 0; + int r, cnt; - for(;;) - { - if (*tok >= KW_D0 && *tok <= KW_A7) - r = *tok++ & 15; - else - break; + for(;;) + { + if (*tok >= KW_FP0 && *tok <= KW_FP7) + r = *tok++ & 7; + else + break; - if (*tok == '-') - { - tok++; + if (*tok == '-') + { + tok++; - if (*tok >= KW_D0 && *tok <= KW_A7) - cnt = *tok++ & 15; - else - return error("register list syntax"); + if (*tok >= KW_FP0 && *tok <= KW_FP7) + cnt = *tok++ & 7; + else + return error("register list syntax"); - if (cnt < r) - return error("register list order"); + if (cnt < r) + return error("register list order"); - cnt -= r; - } - else - cnt = 0; + cnt -= r; + } + else + cnt = 0; - while (cnt-- >= 0) - rmask |= msktab[r++]; + while (cnt-- >= 0) + rmask |= msktab_plus[r++]; - if (*tok != '/') - break; + if (*tok != '/') + break; - tok++; - } + tok++; + } - *a_rmask = rmask; + *a_rmask = rmask; - return OK; + return OK; } +// +// Check for bitfield instructions extra params +// These are 020+ instructions and have the following syntax: +// bfxxx {param1,param2} +// param1/2 are either data registers or immediate values +// + +int check030bf(void) +{ + WARNING (Add more strict checks as well as checks for non defined (yet) labels) + + if ((activecpu & (CPU_68020 | CPU_68030 | CPU_68040)) == 0) + return error(unsupport); + + tok++; + if (*tok == CONST) + { + tok++; + bfparam1 = *(int *)tok; + if (bfparam1 > 31 || bfparam1 < 0) + return error("bfxxx offset: immediate value must be between 0 and 31"); + bfparam1 = (bfparam1 << 6) | (0 << 11); //Do=0, offset=immediate - shift it to place + tok++; + } + else if (*tok == SYMBOL) + { + if (expr(bf0expr, &bf0exval, &bf0exattr, &bf0esym) != OK) + return ERROR; + bfparam1 = bf0exval; + if (bfparam1 > 31 || bfparam1 < 0) + return error("bfxxx offset: immediate value must be between 0 and 31"); + bfparam1 = (bfparam1 << 6) | (0 << 11); //Do=0, offset=immediate - shift it to place + } + else if (*tok >= KW_D0 && *tok <= KW_D7) + { + bfparam1 = ((*(int *)tok - 128) << 6) | (1 << 11); //Do=1, offset=data register - shift it to place + tok++; + } + else + return ERROR; + + if (*tok==':') + tok++; //eat the ':' + + if (*tok == '}' && tok[1] == EOL) + { + tok++; + return OK; //It is ok to have }, EOL here - it might be "fmove fpn, {dx}" + } + + + if (*tok == CONST) + { + tok++; + bfparam2 = *(int *)tok; + if (bfparam2 > 31 || bfparam2 < 0) + return error("bfxxx width: immediate value must be between 0 and 31"); + bfparam2 = (bfparam2 << 0) | (0 << 5); //Do=0, offset=immediate - shift it to place + tok++; + } + else if (*tok == SYMBOL) + { + if (expr(bf0expr, &bf0exval, &bf0exattr, &bf0esym) != OK) + return ERROR; + bfparam2 = bf0exval; + if (bfparam2 > 31 || bfparam2 < 0) + return error("bfxxx width: immediate value must be between 0 and 31"); + bfparam2 = (bfparam2 << 0) | (0 << 5); //Do=0, offset=immediate - shift it to place + } + else if (*tok >= KW_D0 && *tok <= KW_D7) + { + bfparam2 = ((*(int *)tok - 128) << 0) | (1 << 5); //Do=1, offset=data register - shift it to place + tok++; + } + else + return ERROR; + + tok++; //eat the '}' + + return OK; +}