+++ /dev/null
-//
-// RMAC - Reboot's Macro Assembler for the Atari Jaguar Console System
-// RISCA.C - GPU/DSP Assembler
-// 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
-//
-
-#include "risca.h"
-#include "error.h"
-#include "sect.h"
-#include "token.h"
-#include "expr.h"
-#include "direct.h"
-#include "mark.h"
-#include "amode.h"
-
-#define DEF_MR // Declar keyword values
-#include "risckw.h" // Incl generated risc keywords
-
-#define DEF_KW // Declare keyword values
-#include "kwtab.h" // Incl generated keyword tables & defs
-
-
-unsigned altbankok = 0; // Ok to use alternate register bank
-unsigned orgactive = 0; // RISC org directive active
-unsigned orgaddr = 0; // Org'd address
-unsigned orgwarning = 0; // Has an ORG warning been issued
-
-char reg_err[] = "missing register R0...R31";
-
-// Jaguar Jump Condition Names
-char condname[MAXINTERNCC][5] = {
- "NZ", "Z", "NC", "NCNZ", "NCZ", "C", "CNZ", "CZ", "NN", "NNNZ", "NNZ",
- "N", "N_NZ", "N_Z ", "T", "A", "NE", "EQ", "CC", "HS", "HI", "CS", "LO",
- "PL", "MI", "F"
-};
-
-// Jaguar Jump Condition Numbers
-char condnumber[] = {
- 1, 2, 4, 5, 6, 8, 9, 10, 20, 21, 22, 24, 25, 26,
- 0, 0, 1, 2, 4, 4, 5, 8, 8, 20, 24, 31
-};
-
-struct opcoderecord roptbl[] = {
- { MR_ADD, RI_TWO, 0 },
- { MR_ADDC, RI_TWO, 1 },
- { MR_ADDQ, RI_NUM_32, 2 },
- { MR_ADDQT, RI_NUM_32, 3 },
- { MR_SUB, RI_TWO, 4 },
- { MR_SUBC, RI_TWO, 5 },
- { MR_SUBQ, RI_NUM_32, 6 },
- { MR_SUBQT, RI_NUM_32, 7 },
- { MR_NEG, RI_ONE, 8 },
- { MR_AND, RI_TWO, 9 },
- { MR_OR, RI_TWO, 10 },
- { MR_XOR, RI_TWO, 11 },
- { MR_NOT, RI_ONE, 12 },
- { MR_BTST, RI_NUM_31, 13 },
- { MR_BSET, RI_NUM_31, 14 },
- { MR_BCLR, RI_NUM_31, 15 },
- { MR_MULT, RI_TWO, 16 },
- { MR_IMULT, RI_TWO, 17 },
- { MR_IMULTN, RI_TWO, 18 },
- { MR_RESMAC, RI_ONE, 19 },
- { MR_IMACN, RI_TWO, 20 },
- { MR_DIV, RI_TWO, 21 },
- { MR_ABS, RI_ONE, 22 },
- { MR_SH, RI_TWO, 23 },
- { MR_SHLQ, RI_NUM_32, 24 + SUB32 },
- { MR_SHRQ, RI_NUM_32, 25 },
- { MR_SHA, RI_TWO, 26 },
- { MR_SHARQ, RI_NUM_32, 27 },
- { MR_ROR, RI_TWO, 28 },
- { MR_RORQ, RI_NUM_32, 29 },
- { MR_ROLQ, RI_NUM_32, 29 + SUB32 },
- { MR_CMP, RI_TWO, 30 },
- { MR_CMPQ, RI_NUM_15, 31 },
- { MR_SAT8, RI_ONE, 32 + GPUONLY },
- { MR_SUBQMOD, RI_NUM_32, 32 + DSPONLY },
- { MR_SAT16, RI_ONE, 33 + GPUONLY },
- { MR_SAT16S, RI_ONE, 33 + DSPONLY },
- { MR_MOVEQ, RI_NUM_31, 35 },
- { MR_MOVETA, RI_TWO, 36 },
- { MR_MOVEFA, RI_TWO, 37 },
- { MR_MOVEI, RI_MOVEI, 38 },
- { MR_LOADB, RI_LOADN, 39 },
- { MR_LOADW, RI_LOADN, 40 },
- { MR_LOADP, RI_LOADN, 42 + GPUONLY },
- { MR_SAT32S, RI_ONE, 42 + DSPONLY },
- { MR_STOREB, RI_STOREN, 45 },
- { MR_STOREW, RI_STOREN, 46 },
- { MR_STOREP, RI_STOREN, 48 + GPUONLY },
- { MR_MIRROR, RI_ONE, 48 + DSPONLY },
- { MR_JUMP, RI_JUMP, 52 },
- { MR_JR, RI_JR, 53 },
- { MR_MMULT, RI_TWO, 54 },
- { MR_MTOI, RI_TWO, 55 },
- { MR_NORMI, RI_TWO, 56 },
- { MR_NOP, RI_NONE, 57 },
- { MR_SAT24, RI_ONE, 62 },
- { MR_UNPACK, RI_ONE, 63 + GPUONLY },
- { MR_PACK, RI_ONE, 63 + GPUONLY },
- { MR_ADDQMOD, RI_NUM_32, 63 + DSPONLY },
- { MR_MOVE, RI_MOVE, 0 },
- { MR_LOAD, RI_LOAD, 0 },
- { MR_STORE, RI_STORE, 0 }
-};
-
-
-//
-// Convert a String to Uppercase
-//
-void strtoupper(char * s)
-{
-#if 0
- while (*s)
- {
- *s = (char)(toupper(*s));
- s++;
- }
-#else
- while (*s)
- *s++ &= 0xDF;
-#endif
-}
-
-
-//
-// Function to return "malformed expression" error
-// This is done mainly to remove a bunch of GOTO statements in the parser
-//
-static inline int MalformedOpcode(void)
-{
- error("Malformed opcode");
- return ERROR;
-}
-
-
-//
-// Build RISC Instruction Word
-//
-void BuildRISCIntructionWord(unsigned short opcode, int reg1, int reg2)
-{
- // Check for absolute address setting
- if (!orgwarning && !orgactive)
- {
- warn("GPU/DSP code outside of absolute section");
- orgwarning = 1;
- }
-
- int value = ((opcode & 0x3F) << 10) + ((reg1 & 0x1F) << 5) + (reg2 & 0x1F);
- D_word(value);
-}
-
-
-//
-// Get a RISC Register
-//
-int GetRegister(WORD rattr)
-{
- VALUE eval; // Expression value
- WORD eattr; // Expression attributes
- SYM * esym; // External symbol involved in expr.
- TOKEN r_expr[EXPRSIZE]; // Expression token list
-
- // Evaluate what's in the global "tok" buffer
- if (expr(r_expr, &eval, &eattr, &esym) != OK)
- return MalformedOpcode();
-
- if ((challoc - ch_size) < 4)
- chcheck(4L);
-
- if (!(eattr & DEFINED))
- {
- fixup((WORD)(FU_WORD | rattr), sloc, r_expr);
- return 0;
- }
-
- // If we got a register in range (0-31), return it
- if ((eval >= 0) && (eval <= 31))
- return eval;
-
- // Otherwise, it's out of range & we flag an error
- error(reg_err);
- return ERROR;
-}
-
-
-//
-// Do RISC Code Generation
-//
-int GenerateRISCCode(int state)
-{
- int reg1; // Register 1
- int reg2; // Register 2
- int val = 0; // Constructed value
- char scratch[80];
- SYM * ccsym;
- SYM * sy;
- int i, commaFound;
- TOKEN * t;
- WORD attrflg;
- int indexed; // Indexed register flag
-
- VALUE eval; // Expression value
- WORD eattr; // Expression attributes
- SYM * esym; // External symbol involved in expr.
- TOKEN r_expr[EXPRSIZE]; // Expression token list
-
- // Get opcode parameter and type
- unsigned short parm = (WORD)(roptbl[state - 3000].parm);
- unsigned type = roptbl[state - 3000].typ;
-
- // Detect whether the opcode parmeter passed determines that the opcode is
- // specific to only one of the RISC processors and ensure it is legal in
- // the current code section. If not then show error and return.
- if (((parm & GPUONLY) && rdsp) || ((parm & DSPONLY) && rgpu))
- {
- error("Opcode is not valid in this code section");
- return ERROR;
- }
-
- // Process RISC opcode
- switch (type)
- {
- // No operand instructions
- // NOP
- case RI_NONE:
- BuildRISCIntructionWord(parm, 0, 0);
- break;
-
- // Single operand instructions (Rd)
- // ABS, MIRROR, NEG, NOT, PACK, RESMAC, SAT8, SAT16, SAT16S, SAT24, SAT32S, UNPACK
- case RI_ONE:
- reg2 = GetRegister(FU_REGTWO);
- at_eol();
- BuildRISCIntructionWord(parm, parm >> 6, reg2);
- break;
-
- // Two operand instructions (Rs,Rd)
- // ADD, ADDC, AND, CMP, DIV, IMACN, IMULT, IMULTN, MOVEFA, MOVETA, MULT, MMULT,
- // MTOI, NORMI, OR, ROR, SH, SHA, SUB, SUBC, XOR
- case RI_TWO:
- if (parm == 37)
- altbankok = 1; // MOVEFA
-
- reg1 = GetRegister(FU_REGONE);
- CHECK_COMMA;
-
- if (parm == 36)
- altbankok = 1; // MOVETA
-
- reg2 = GetRegister(FU_REGTWO);
- at_eol();
- BuildRISCIntructionWord(parm, reg1, reg2);
- break;
-
- // Numeric operand (n,Rd) where n = -16..+15
- // CMPQ
- case RI_NUM_15:
-
- // Numeric operand (n,Rd) where n = 0..31
- // BCLR, BSET, BTST, MOVEQ
- case RI_NUM_31:
-
- // Numeric operand (n,Rd) where n = 1..32
- // ADDQ, ADDQMOD, ADDQT, SHARQ, SHLQ, SHRQ, SUBQ, SUBQMOD, SUBQT, ROLQ, RORQ
- case RI_NUM_32:
- switch (type)
- {
- case RI_NUM_15:
- reg1 = -16; reg2 = 15; attrflg = FU_NUM15;
- break;
- default:
- case RI_NUM_31:
- reg1 = 0; reg2 = 31; attrflg = FU_NUM31;
- break;
- case RI_NUM_32:
- reg1 = 1; reg2 = 32; attrflg = FU_NUM32;
- break;
- }
-
- if (parm & SUB32)
- attrflg |= FU_SUB32;
-
- if (*tok != '#')
- return MalformedOpcode();
-
- tok++;
-
- if (expr(r_expr, &eval, &eattr, &esym) != OK)
- return MalformedOpcode();
-
- if ((challoc - ch_size) < 4)
- chcheck(4L);
-
- if (!(eattr & DEFINED))
- {
- fixup((WORD)(FU_WORD | attrflg), sloc, r_expr);
- reg1 = 0;
- }
- else
- {
- if ((int)eval < reg1 || (int)eval > reg2)
- {
- error("constant out of range");
- return ERROR;
- }
-
- if (parm & SUB32)
- reg1 = 32 - eval;
- else if (type == RI_NUM_32)
- reg1 = (reg1 == 32 ? 0 : eval);
- else
- reg1 = eval;
- }
-
- CHECK_COMMA;
- reg2 = GetRegister(FU_REGTWO);
- at_eol();
- BuildRISCIntructionWord(parm, reg1, reg2);
- break;
-
- // Move Immediate--n,Rn--n in Second Word
- case RI_MOVEI:
- if (*tok != '#')
- return MalformedOpcode();
-
- tok++;
-
- if (expr(r_expr, &eval, &eattr, &esym) != OK)
- return MalformedOpcode();
-
- if ((challoc - ch_size) < 4)
- chcheck(4L);
-
- if (!(eattr & DEFINED))
- {
- fixup(FU_LONG | FU_MOVEI, sloc + 2, r_expr);
- eval = 0;
- }
- else
- {
- if (eattr & TDB)
-//{
-//printf("risca: Doing rmark for RI_MOVEI (tdb=$%X)...\n", eattr & TDB);
- rmark(cursect, sloc + 2, (eattr & TDB), (MLONG | MMOVEI), NULL);
-//}
- }
-
- val = ((eval >> 16) & 0x0000FFFF) | ((eval << 16) & 0xFFFF0000);
- CHECK_COMMA;
- reg2 = GetRegister(FU_REGTWO);
- at_eol();
- D_word((((parm & 0x3F) << 10) + reg2));
- D_long(val);
- break;
-
- // PC,Rd or Rs,Rd
- case RI_MOVE:
- if (*tok == KW_PC)
- {
- parm = 51;
- reg1 = 0;
- tok++;
- }
- else
- {
- parm = 34;
- reg1 = GetRegister(FU_REGONE);
- }
-
- CHECK_COMMA;
- reg2 = GetRegister(FU_REGTWO);
- at_eol();
- BuildRISCIntructionWord(parm, reg1, reg2);
- break;
-
- // (Rn),Rn = 41 / (R14/R15+n),Rn = 43/44 / (R14/R15+Rn),Rn = 58/59
- case RI_LOAD:
- indexed = 0;
- parm = 41;
-
- if (*tok != '(')
- return MalformedOpcode();
-
- tok++;
-
- if ((*tok == KW_R14 || *tok == KW_R15) && (*(tok + 1) != ')'))
- indexed = (*tok - KW_R0);
-
- if (*tok == SYMBOL)
- {
-// sy = lookup((char *)tok[1], LABEL, 0);
- sy = lookup(string[tok[1]], LABEL, 0);
-
- if (!sy)
- {
- error(reg_err);
- return ERROR;
- }
-
- if (sy->sattre & EQUATEDREG)
- {
- if (((sy->svalue & 0x1F) == 14 || (sy->svalue & 0x1F) == 15)
- && (*(tok + 2) != ')'))
- {
- indexed = (sy->svalue & 0x1F);
- tok++;
- }
- }
- }
-
- if (!indexed)
- {
- reg1 = GetRegister(FU_REGONE);
- }
- else
- {
- reg1 = indexed;
- indexed = 0;
- tok++;
-
- if (*tok == '+')
- {
- parm = (WORD)(reg1 - 14 + 58);
- tok++;
-
- if (*tok >= KW_R0 && *tok <= KW_R31)
- indexed = 1;
-
- if (*tok == SYMBOL)
- {
-// sy = lookup((char *)tok[1], LABEL, 0);
- sy = lookup(string[tok[1]], LABEL, 0);
-
- if (!sy)
- {
- error(reg_err);
- return ERROR;
- }
-
- if (sy->sattre & EQUATEDREG)
- indexed = 1;
- }
-
- if (indexed)
- {
- reg1 = GetRegister(FU_REGONE);
- }
- else
- {
- if (expr(r_expr, &eval, &eattr, &esym) != OK)
- return MalformedOpcode();
-
- if ((challoc - ch_size) < 4)
- chcheck(4L);
-
- if (!(eattr & DEFINED))
- {
- error("constant expected");
- return ERROR;
- }
-
- reg1 = eval;
-
- if (reg1 == 0)
- {
- reg1 = 14 + (parm - 58);
- parm = 41;
- warn("NULL offset removed");
- }
- else
- {
- if (reg1 < 1 || reg1 > 32)
- {
- error("constant out of range");
- return ERROR;
- }
-
- if (reg1 == 32)
- reg1 = 0;
-
- parm = (WORD)(parm - 58 + 43);
- }
- }
- }
- else
- {
- reg1 = GetRegister(FU_REGONE);
- }
- }
-
- if (*tok != ')')
- return MalformedOpcode();
-
- tok++;
- CHECK_COMMA;
- reg2 = GetRegister(FU_REGTWO);
- at_eol();
- BuildRISCIntructionWord(parm, reg1, reg2);
- break;
-
- // Rn,(Rn) = 47 / Rn,(R14/R15+n) = 49/50 / Rn,(R14/R15+Rn) = 60/61
- case RI_STORE:
- parm = 47;
- reg1 = GetRegister(FU_REGONE);
- CHECK_COMMA;
-
- if (*tok != '(')
- return MalformedOpcode();
-
- tok++;
- indexed = 0;
-
- if ((*tok == KW_R14 || *tok == KW_R15) && (*(tok + 1) != ')'))
- indexed = (*tok - KW_R0);
-
- if (*tok == SYMBOL)
- {
-// sy = lookup((char *)tok[1], LABEL, 0);
- sy = lookup(string[tok[1]], LABEL, 0);
-
- if (!sy)
- {
- error(reg_err);
- return ERROR;
- }
-
- if (sy->sattre & EQUATEDREG)
- {
- if (((sy->svalue & 0x1F) == 14 || (sy->svalue & 0x1F) == 15)
- && (*(tok + 2) != ')'))
- {
- indexed = (sy->svalue & 0x1F);
- tok++;
- }
- }
- }
-
- if (!indexed)
- {
- reg2 = GetRegister(FU_REGTWO);
- }
- else
- {
- reg2 = indexed;
- indexed = 0;
- tok++;
-
- if (*tok == '+')
- {
- parm = (WORD)(reg2 - 14 + 60);
- tok++;
-
- if (*tok >= KW_R0 && *tok <= KW_R31)
- indexed = 1;
-
- if (*tok == SYMBOL)
- {
-// sy = lookup((char *)tok[1], LABEL, 0);
- sy = lookup(string[tok[1]], LABEL, 0);
-
- if (!sy)
- {
- error(reg_err);
- return ERROR;
- }
-
- if (sy->sattre & EQUATEDREG)
- indexed = 1;
- }
-
- if (indexed)
- {
- reg2 = GetRegister(FU_REGTWO);
- }
- else
- {
- if (expr(r_expr, &eval, &eattr, &esym) != OK)
- return MalformedOpcode();
-
- if ((challoc - ch_size) < 4)
- chcheck(4L);
-
- if (!(eattr & DEFINED))
- {
- fixup(FU_WORD | FU_REGTWO, sloc, r_expr);
- reg2 = 0;
- }
- else
- {
- reg2 = eval;
-
- if (reg2 == 0)
- {
- reg2 = 14 + (parm - 60);
- parm = 47;
- warn("NULL offset removed");
- }
- else
- {
- if (reg2 < 1 || reg2 > 32)
- {
- error("constant out of range");
- return ERROR;
- }
-
- if (reg2 == 32)
- reg2 = 0;
-
- parm = (WORD)(parm - 60 + 49);
- }
- }
- }
- }
- else
- {
- reg2 = GetRegister(FU_REGTWO);
- }
- }
-
- if (*tok != ')')
- return MalformedOpcode();
-
- tok++;
- at_eol();
- BuildRISCIntructionWord(parm, reg2, reg1);
- break;
-
- // LOADB/LOADP/LOADW (Rn),Rn
- case RI_LOADN:
- if (*tok != '(')
- return MalformedOpcode();
-
- tok++;
- reg1 = GetRegister(FU_REGONE);
-
- if (*tok != ')')
- return MalformedOpcode();
-
- tok++;
- CHECK_COMMA;
- reg2 = GetRegister(FU_REGTWO);
- at_eol();
- BuildRISCIntructionWord(parm, reg1, reg2);
- break;
-
- // STOREB/STOREP/STOREW Rn,(Rn)
- case RI_STOREN:
- reg1 = GetRegister(FU_REGONE);
- CHECK_COMMA;
-
- if (*tok != '(')
- return MalformedOpcode();
-
- tok++;
- reg2 = GetRegister(FU_REGTWO);
-
- if (*tok != ')')
- return MalformedOpcode();
-
- tok++;
- at_eol();
- BuildRISCIntructionWord(parm, reg2, reg1);
- break;
-
- // Jump Relative - cc,n - n=-16..+15 words, reg2=cc
- case RI_JR:
-
- // Jump Absolute - cc,(Rs) - reg2=cc
- case RI_JUMP:
- // Check to see if there is a comma in the token string. If not then
- // the JR or JUMP should default to 0, Jump Always
- commaFound = 0;
-
- for(t=tok; *t!=EOL; t++)
- {
- if (*t == ',')
- {
- commaFound = 1;
- break;
- }
- }
-
- if (commaFound)
- {
- if (*tok == CONST)
- {
- // CC using a constant number
- tok++;
- val = *tok;
- tok++;
- CHECK_COMMA;
- }
- else if (*tok == SYMBOL)
- {
- val = 99;
-// strcpy(scratch, (char *)tok[1]);
- strcpy(scratch, string[tok[1]]);
- strtoupper(scratch);
-
- for(i=0; i<MAXINTERNCC; i++)
- {
- // Look for the condition code & break if found
- if (strcmp(condname[i], scratch) == 0)
- {
- val = condnumber[i];
- break;
- }
- }
-
- // Standard CC was not found, look for an equated one
- if (val == 99)
- {
-// ccsym = lookup((char *)tok[1], LABEL, 0);
- ccsym = lookup(string[tok[1]], LABEL, 0);
-
- if (ccsym && (ccsym->sattre & EQUATEDCC) && !(ccsym->sattre & UNDEF_CC))
- {
- val = ccsym->svalue;
- }
- else
- {
- error("unknown condition code");
- return ERROR;
- }
- }
-
- tok += 2;
- CHECK_COMMA;
- }
- else if (*tok == '(')
- {
- // Set CC to "Jump Always"
- val = 0;
- }
- }
- else
- {
- // Set CC to "Jump Always"
- val = 0;
- }
-
- if (val < 0 || val > 31)
- {
- error("condition constant out of range");
- return ERROR;
- }
-
- // Store condition code
- reg1 = val;
-
- if (type == RI_JR)
- {
- // JR cc,n
- if (expr(r_expr, &eval, &eattr, &esym) != OK)
- return MalformedOpcode();
-
- if ((challoc - ch_size) < 4)
- chcheck(4L);
-
- if (!(eattr & DEFINED))
- {
- fixup(FU_WORD | FU_JR, sloc, r_expr);
- reg2 = 0;
- }
- else
- {
- reg2 = ((int)(eval - ((orgactive ? orgaddr : sloc) + 2))) / 2;
-
- if ((reg2 < -16) || (reg2 > 15))
- error("PC relative overflow");
- }
-
- BuildRISCIntructionWord(parm, reg2, reg1);
- }
- else
- {
- // JUMP cc, (Rn)
- if (*tok != '(')
- return MalformedOpcode();
-
- tok++;
- reg2 = GetRegister(FU_REGTWO);
-
- if (*tok != ')')
- return MalformedOpcode();
-
- tok++;
- at_eol();
- BuildRISCIntructionWord(parm, reg2, reg1);
- }
-
- break;
-
- // Should never get here :-D
- default:
- error("Unknown risc opcode type");
- return ERROR;
- }
-
- return 0;
-}
-
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