X-Git-Url: http://shamusworld.gotdns.org/cgi-bin/gitweb.cgi?p=rmac;a=blobdiff_plain;f=risca.c;fp=risca.c;h=0000000000000000000000000000000000000000;hp=472e4f1e3d1da6b068b0f55959c01bebb53a6b60;hb=f6e6a55c4cdaf0dffa0897792dc5926c7b173a23;hpb=bb94015a443a0aebaa93ee62f9f2738fa3a96784 diff --git a/risca.c b/risca.c deleted file mode 100644 index 472e4f1..0000000 --- a/risca.c +++ /dev/null @@ -1,806 +0,0 @@ -// -// 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; isattre & 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; -} -