| |
| /* generate instructions for Z8KSIM |
| Copyright (C) 1992, 1993 Free Software Foundation, Inc. |
| |
| This file is part of Z8KSIM |
| |
| Z8KSIM is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| Z8KSIM is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with Z8KZIM; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| |
| /* This program generates the code which emulates each of the z8k |
| instructions |
| |
| code goes into three files, tc-gen1.h, tc-gen2.h and tc-gen3.h. |
| which file being made depends upon the options |
| |
| -1 tc-gen1.h contains the fully expanded code for some selected |
| opcodes, (those in the quick.c list) |
| |
| -2 tc-gen2.h contains a list of pointers to functions, one for each |
| opcode. It points to functions in tc-gen3.h and tc-gen1.h |
| depending upon quick.c |
| |
| -3 tc-gen3.h contains all the opcodes in unexpanded form. |
| |
| -b3 tc-genb3.h same as -3 but for long pointers |
| |
| -m regenerates list.c, which is an inverted list of opcodes to |
| pointers into the z8k dissassemble opcode table, it's just there |
| to makes things faster. |
| */ |
| |
| /* steve chamberlain |
| sac@cygnus.com */ |
| |
| #include "config.h" |
| |
| #include <ansidecl.h> |
| #include <stdio.h> |
| #ifdef HAVE_STDLIB_H |
| #include <stdlib.h> |
| #endif |
| #ifdef HAVE_STRING_H |
| #include <string.h> |
| #else |
| #ifdef HAVE_STRINGS_H |
| #include <strings.h> |
| #endif |
| #endif |
| |
| #define NICENAMES |
| |
| #define DEFINE_TABLE |
| #include "../opcodes/z8k-opc.h" |
| |
| #define NOPS 500 |
| |
| #define DIRTY_HACK 0 /* Enable if your gcc can't cope with huge tables */ |
| extern short z8k_inv_list[]; |
| struct opcode_value |
| { |
| int n; |
| struct opcode_value *next; |
| }; |
| |
| #define NICENAMES |
| int BIG; |
| |
| static char *reg_names[] = |
| {"bad", "src", "dst", "aux_a", "aux_b", "aux_r", "aux_x"}; |
| |
| #define IS_DST(x) ((x & 0xf) == 2) |
| #define IS_SRC(x) ((x & 0xf)==1) |
| #define SIZE_ADDRESS (BIG ? 8 : 4) /* number of nibbles in a ptr*/ |
| |
| static int file; |
| static int makelist; |
| |
| static int nibs = 0; |
| |
| static char *current_size; |
| static char *current_name; |
| static char current_word0[40]; |
| static char current_byte0[40]; |
| static char current_byte1[40]; |
| static int indent; |
| static char *p; |
| static char *d; |
| |
| struct opcode_value *list[NOPS]; |
| |
| static opcode_entry_type * |
| lookup_inst (what) |
| int what; |
| { |
| if (makelist) |
| { |
| |
| int nibl_index; |
| int nibl_matched; |
| unsigned short instr_nibl; |
| unsigned short tabl_datum, datum_class, datum_value; |
| char instr_nibbles[8]; |
| |
| opcode_entry_type *ptr = z8k_table; |
| |
| nibl_matched = 0; |
| |
| instr_nibbles[3] = (what >> 0) & 0xf; |
| instr_nibbles[2] = (what >> 4) & 0xf; |
| instr_nibbles[1] = (what >> 8) & 0xf; |
| instr_nibbles[0] = (what >> 12) & 0xf; |
| |
| while (ptr->name) |
| { |
| nibl_matched = 1; |
| for (nibl_index = 0; nibl_index < 4 && nibl_matched; nibl_index++) |
| { |
| instr_nibl = instr_nibbles[nibl_index]; |
| |
| tabl_datum = ptr->byte_info[nibl_index]; |
| datum_class = tabl_datum & CLASS_MASK; |
| datum_value = ~CLASS_MASK & tabl_datum; |
| |
| switch (datum_class) |
| { |
| case CLASS_BIT_1OR2: |
| if (datum_value != (instr_nibl & ~0x2)) |
| nibl_matched = 0; |
| break; |
| |
| case CLASS_BIT: |
| if (datum_value != instr_nibl) |
| nibl_matched = 0; |
| break; |
| case CLASS_00II: |
| if (!((~instr_nibl) & 0x4)) |
| nibl_matched = 0; |
| break; |
| case CLASS_01II: |
| if (!(instr_nibl & 0x4)) |
| nibl_matched = 0; |
| break; |
| case CLASS_0CCC: |
| if (!((~instr_nibl) & 0x8)) |
| nibl_matched = 0; |
| break; |
| case CLASS_1CCC: |
| if (!(instr_nibl & 0x8)) |
| nibl_matched = 0; |
| break; |
| case CLASS_0DISP7: |
| if (!((~instr_nibl) & 0x8)) |
| nibl_matched = 0; |
| nibl_index += 1; |
| break; |
| case CLASS_1DISP7: |
| if (!(instr_nibl & 0x8)) |
| nibl_matched = 0; |
| nibl_index += 1; |
| break; |
| case CLASS_REGN0: |
| if (instr_nibl == 0) |
| nibl_matched = 0; |
| break; |
| default: |
| break; |
| } |
| } |
| if (nibl_matched) |
| { |
| return ptr; |
| } |
| ptr++; |
| } |
| return 0; |
| } |
| else |
| { |
| |
| if (z8k_inv_list[what] < 0) |
| return 0; |
| return z8k_table + z8k_inv_list[what]; |
| } |
| } |
| |
| static char * |
| insn_4 (n) |
| int n; |
| { |
| switch (n) |
| { |
| case 1: |
| return "((iwords_0>>8) & 0xf)"; |
| case 2: |
| return "((ibytes_1 >> 4) & 0xf)"; |
| case 3: |
| return "((ibytes_1) & 0xf)"; |
| case 4: |
| return "((ibytes_2>>4) & 0xf)"; |
| case 5: |
| return "((ibytes_2) & 0xf)"; |
| case 6: |
| return "((ibytes_3 >> 4) & 0xf)"; |
| case 7: |
| return "((ibytes_3) & 0xf)"; |
| default: |
| return "****"; |
| } |
| } |
| |
| char * |
| ptr_mode () |
| { |
| if (BIG) |
| { |
| return "ptr_long"; |
| } |
| return "word"; |
| } |
| |
| static |
| char * |
| ptr_size () |
| { |
| if (BIG) |
| return "4"; |
| return "2"; |
| } |
| |
| static char * |
| reg_n (x) |
| unsigned int x; |
| { |
| return reg_names[x & 0xf]; |
| } |
| |
| char * |
| stack_ptr () |
| { |
| return BIG ? "14" : "15"; |
| } |
| |
| char * |
| mem () |
| { |
| #if 0 |
| return BIG ? "segmem" : "unsegmem"; |
| #else |
| return "mem"; |
| #endif |
| } |
| |
| int |
| match (a) |
| char *a; |
| { |
| if (strncmp (p, a, strlen (a)) == 0) |
| { |
| p += strlen (a); |
| return 1; |
| } |
| return 0; |
| } |
| |
| static |
| void |
| sub (y) |
| char *y; |
| { |
| sprintf (d, "%s", y); |
| d += strlen (d); |
| } |
| |
| static char * |
| insn_16 (n) |
| int n; |
| { |
| switch (n) |
| { |
| case 0: |
| return "(iwords_0)"; |
| case 4: |
| return "(iwords_1)"; |
| case 8: |
| return "(iwords_2)"; |
| case 12: |
| return "(iwords_3)"; |
| default: |
| return "****"; |
| } |
| } |
| |
| static |
| char * |
| insn_32 (n) |
| int n; |
| { |
| switch (n) |
| { |
| case 0: |
| return "((iwords_0<<16) | (iwords_1))"; |
| case 4: |
| return "((iwords_1<<16) | (iwords_2))"; |
| case 8: |
| return "((iwords_2<<16) | (iwords_3))"; |
| default: |
| return "****"; |
| } |
| } |
| |
| static char * |
| size_name (x) |
| int x; |
| { |
| switch (x) |
| { |
| case 8: |
| return "byte"; |
| case 16: |
| return "word"; |
| case 32: |
| return "long"; |
| case 64: |
| return "quad"; |
| } |
| return "!!"; |
| } |
| |
| /*VARARGS*/ |
| void |
| emit (string, a1, a2, a3, a4, a5) |
| char *string; |
| char* a1; |
| char* a2; |
| char* a3; |
| char* a4; |
| char* a5; |
| { |
| int indent_inc = 0; |
| int indent_dec = 0; |
| int i; |
| char buffer[1000]; |
| |
| d = buffer; |
| p = string; |
| |
| while (*p) |
| { |
| if (match ("<fop>")) |
| { |
| if (BIG) |
| { |
| sub ("bfop"); |
| } |
| else |
| { |
| sub ("sfop"); |
| } |
| } |
| else if (match ("<iptr>")) |
| { |
| if (BIG) |
| { |
| switch (nibs) |
| { |
| case 4: |
| sub ("(((iwords_1 << 8) | (iwords_2)) & 0x7fffff)"); |
| break; |
| default: |
| sub ("fail(context,124)"); |
| break; |
| } |
| } |
| else |
| { |
| switch (nibs) |
| { |
| case 4: |
| sub ("iwords_1"); |
| break; |
| default: |
| sub ("fail(context,123)"); |
| break; |
| } |
| } |
| } |
| else if (match ("<name>")) |
| { |
| sub (current_name); |
| } |
| else if (match ("<size>")) |
| { |
| sub (current_size); |
| } |
| else if (match ("<insn_4>")) |
| { |
| sub (insn_4 (nibs)); |
| } |
| else if (match ("<insn_16>")) |
| { |
| sub (insn_16 (nibs)); |
| } |
| else if (match ("<insn_32>")) |
| { |
| sub (insn_32 (nibs)); |
| } |
| else if (match ("iwords_0")) |
| { |
| sub (current_word0); |
| } |
| else if (match ("ibytes_0")) |
| { |
| sub (current_byte0); |
| } |
| else if (match ("<ibytes_1>")) |
| { |
| sub (current_byte1); |
| } |
| else if (match ("<next_size>")) |
| { |
| if (strcmp (current_size, "word") == 0) |
| sub ("long"); |
| if (strcmp (current_size, "byte") == 0) |
| sub ("word"); |
| else if (strcmp (current_size, "long") == 0) |
| sub ("quad"); |
| else |
| abort (); |
| } |
| else if (match ("<addr_type>")) |
| { |
| if (BIG) |
| sub ("unsigned long"); |
| else |
| sub ("unsigned short"); |
| } |
| |
| else if (match ("<c_size>")) |
| { |
| if (strcmp (current_size, "word") == 0) |
| sub ("short"); |
| else if (strcmp (current_size, "byte") == 0) |
| sub ("char"); |
| else if (strcmp (current_size, "long") == 0) |
| sub ("long"); |
| else |
| abort (); |
| } |
| |
| else if (match ("<pc>")) |
| { |
| sub ("pc"); |
| } |
| else if (match ("<mem>")) |
| { |
| sub (mem ()); |
| } |
| else if (match ("<sp>")) |
| { |
| sub (stack_ptr ()); |
| } |
| else if (match ("<ptr_size>")) |
| { |
| sub (ptr_size ()); |
| } |
| else if (match ("<ptr_mode>")) |
| { |
| sub (ptr_mode ()); |
| } |
| else if (match ("<insn_8>")) |
| { |
| switch (nibs) |
| { |
| case 2: |
| sub ("(iwords_0&0xff)"); |
| break; |
| case 4: |
| sub ("(iwords_1>>8)"); |
| break; |
| case 6: |
| sub ("(iwords_1&0xff)"); |
| break; |
| case 8: |
| sub ("(iwords_2>>8)"); |
| break; |
| case 12: |
| sub ("(/* WHO */iwords_3&0xff)"); |
| break; |
| default: |
| abort (); |
| } |
| } |
| else |
| { |
| if (*p == '{') |
| indent_inc++; |
| if (*p == '}') |
| indent_dec++; |
| *d++ = *p; |
| p++; |
| } |
| } |
| *d++ = 0; |
| indent -= indent_dec; |
| for (i = 0; i < indent; i++) |
| printf ("\t"); |
| indent += indent_inc; |
| printf (buffer, a1, a2, a3, a4, a5); |
| |
| } |
| |
| /* fetch the lvalues of the operands */ |
| void |
| info_args (p) |
| opcode_entry_type *p; |
| { |
| unsigned int *s; |
| |
| int done_one_imm8 = 0; |
| |
| /* int done_read = 4;*/ |
| s = p->byte_info; |
| nibs = 0; |
| while (*s) |
| { |
| switch (*s & CLASS_MASK) |
| { |
| case CLASS_BIT_1OR2: |
| emit ("register unsigned int imm_src=(<insn_4>& 2)?2:1;\n"); |
| break; |
| case CLASS_BIT: |
| /* Just ignore these, we've already decoded this bit */ |
| nibs++; |
| break; |
| case CLASS_REGN0: |
| case CLASS_REG: |
| /* this nibble tells us which register to use as an arg, |
| if we've already gobbled the nibble we know what to use */ |
| { |
| int regname = *s & 0xf; |
| |
| emit ("register unsigned int reg_%s=<insn_4>;\n", |
| reg_names[regname]); |
| |
| nibs++; |
| } |
| break; |
| case CLASS_ADDRESS: |
| emit ("register unsigned base_%s=<iptr>;\n", reg_n (*s)); |
| |
| nibs += SIZE_ADDRESS; |
| |
| break; |
| case CLASS_01II: |
| case CLASS_00II: |
| emit ("register unsigned int imm_src=<insn_4>&0x2;\n"); |
| nibs++; |
| break; |
| case CLASS_FLAGS: |
| emit ("register unsigned int imm_src=<insn_4>;\n"); |
| nibs++; |
| break; |
| case CLASS_IMM: |
| /* Work out the size of the think to fetch */ |
| |
| { |
| switch (*s & ~CLASS_MASK) |
| { |
| case ARG_IMM16: |
| emit ("register unsigned imm_src=<insn_16>;\n"); |
| nibs += 4; |
| break; |
| case ARG_IMM32: |
| emit ("register unsigned int imm_src= %s;\n", insn_32 (nibs)); |
| nibs += 8; |
| break; |
| case ARG_IMM4: |
| emit ("register unsigned int imm_src=<insn_4>;\n"); |
| nibs++; |
| break; |
| case ARG_IMM2: |
| emit ("register unsigned int imm_src=<insn_4> & 0x2;\n"); |
| nibs++; |
| break; |
| |
| case ARG_IMM4M1: |
| emit ("register unsigned int imm_src=(<insn_4> + 1);\n"); |
| nibs++; |
| break; |
| case ARG_IMM_1: |
| emit ("register unsigned int imm_src=1;\n"); |
| break; |
| case ARG_IMM_2: |
| emit ("register unsigned int imm_src=2;\n"); |
| break; |
| case ARG_NIM8: |
| emit ("register unsigned int imm_src=-<insn_8>;\n"); |
| nibs += 2; |
| break; |
| case ARG_IMM8: |
| if (!done_one_imm8) |
| { |
| emit ("register unsigned int imm_src=<insn_8>;\n"); |
| nibs += 2; |
| done_one_imm8 = 1; |
| } |
| break; |
| default: |
| emit ("register int fail%d=fail(context,1);\n", nibs); |
| break; |
| } |
| break; |
| |
| case CLASS_DISP8: |
| /* We can't use `(char)' since char might be unsigned. |
| We can't use `(signed char)' because the compiler might be K&R. |
| This seems safe, since it only assumes that bytes are 8 |
| bits. */ |
| emit ("register unsigned int oplval_dst=((ibytes_1 << (sizeof (int) * 8 - 8)) >> (sizeof (int) * 8 - 9)) + pc;\n"); |
| #if 0 |
| /* Original code: fails if characters are unsigned. */ |
| emit ("register unsigned int oplval_dst=(((char)ibytes_1)<<1) + pc;\n"); |
| #endif |
| nibs += 2; |
| break; |
| case CLASS_CC: |
| emit ("register unsigned int op_cc=<insn_4>;\n"); |
| nibs++; |
| break; |
| default: |
| emit ("register int FAIL%d=fail(context,2);\n", nibs); |
| break; |
| } |
| ; |
| /* work out how to fetch the immediate value */ |
| } |
| |
| s++; |
| } |
| } |
| |
| void |
| info_special (p, getdst, nostore, before, nosrc) |
| opcode_entry_type *p; |
| int *getdst; |
| int *nostore; |
| int *before; |
| int *nosrc; |
| { |
| switch (p->opcode) |
| { |
| case OPC_exts: |
| case OPC_extsb: |
| case OPC_extsl: |
| *nostore = 1; |
| *nosrc = 1; |
| break; |
| case OPC_ldm: |
| *nostore = 1; |
| *nosrc = 1; |
| break; |
| case OPC_negb: |
| case OPC_neg: |
| case OPC_sla: |
| case OPC_slab: |
| case OPC_slal: |
| case OPC_sda: |
| case OPC_sdab: |
| case OPC_sdal: |
| case OPC_com: |
| case OPC_comb: |
| case OPC_adc: |
| case OPC_sbc: |
| case OPC_nop: |
| case OPC_adcb: |
| case OPC_add: |
| case OPC_addb: |
| case OPC_addl: |
| case OPC_inc: |
| case OPC_sub: |
| case OPC_subb: |
| case OPC_subl: |
| case OPC_and: |
| case OPC_andb: |
| case OPC_xorb: |
| case OPC_xor: |
| break; |
| |
| case OPC_mult: |
| case OPC_multl: |
| case OPC_div: |
| case OPC_divl: |
| |
| *nostore = 1; |
| break; |
| |
| case OPC_testb: |
| case OPC_test: |
| case OPC_testl: |
| case OPC_cp: |
| case OPC_cpb: |
| case OPC_cpl: |
| case OPC_bit: |
| *nostore = 1; |
| *before = 0; |
| break; |
| |
| case OPC_bpt: |
| case OPC_jr: |
| case OPC_jp: |
| case OPC_ret: |
| case OPC_call: |
| case OPC_tcc: |
| *nosrc = 1; |
| *nostore = 1; |
| *before = 1; |
| break; |
| case OPC_sc: |
| *nostore = 1; |
| *before = 0; |
| break; |
| case OPC_clrb: |
| case OPC_clr: |
| *before = 1; |
| *nosrc = 1; |
| break; |
| case OPC_ldi: |
| case OPC_ldib: |
| case OPC_lddb: |
| case OPC_ldd: |
| |
| *before = 1; |
| *nostore = 1; |
| *nosrc = 1; |
| break; |
| case OPC_ldk: |
| case OPC_ld: |
| case OPC_ldb: |
| case OPC_ldl: |
| *before = 1; |
| *getdst = 0; |
| break; |
| case OPC_push: |
| case OPC_pushl: |
| case OPC_pop: |
| case OPC_popl: |
| *before = 1; |
| *getdst = 0; |
| break; |
| case OPC_lda: |
| *nosrc = 1; |
| break; |
| } |
| } |
| |
| /* calculate the lvalues required for the opcode */ |
| void |
| info_lvals (p) |
| opcode_entry_type *p; |
| { |
| /* emit code to work out lvalues, if any */ |
| unsigned int *i = p->arg_info; |
| |
| while (*i) |
| { |
| current_name = reg_n (*i); |
| current_size = size_name (p->type); |
| switch (*i & CLASS_MASK) |
| { |
| case CLASS_X: |
| /* address(reg) */ |
| emit ("register <addr_type> oplval_<name>= ((base_<name> + (short)get_word_reg(context,reg_<name>)) & 0xffff) + (base_<name> & ~0xffff);\n"); |
| break; |
| case CLASS_IR: |
| /* Indirect register */ |
| emit ("register int oplval_<name> = get_<ptr_mode>_reg(context,reg_<name>);\n"); |
| break; |
| case CLASS_DA: |
| emit ("register int oplval_<name>=base_<name>;\n"); |
| break; |
| case CLASS_IMM: |
| case CLASS_REG_WORD: |
| case CLASS_REG_LONG: |
| case CLASS_REG_BYTE: |
| case CLASS_PR: |
| break; |
| case CLASS_BA: |
| emit ("register int oplval_<name> = get_<ptr_mode>_reg(context,reg_<name>) + (short)(imm_src);\n"); |
| break; |
| case CLASS_BX: |
| emit ("register int oplval_<name> = get_<ptr_mode>_reg(context,reg_<name>)\n"); |
| emit (" + get_word_reg(context,reg_aux_x);\n"); |
| break; |
| } |
| i++; |
| } |
| } |
| |
| /* emit code to fetch the args from calculated lvalues */ |
| int allregs; |
| void |
| info_fetch (p, getdst) |
| opcode_entry_type *p; |
| int getdst; |
| { |
| unsigned int *i = p->arg_info; |
| int had_src = 0; |
| |
| allregs = 1; |
| while (*i) |
| { |
| |
| current_name = reg_n (*i); |
| current_size = size_name (p->type); |
| switch (*i & CLASS_MASK) |
| { |
| case CLASS_X: |
| case CLASS_IR: |
| case CLASS_BA: |
| case CLASS_BX: |
| case CLASS_DA: |
| if (!getdst && IS_DST (*i)) |
| break; |
| emit ("register int op_<name>= get_<size>_<mem>_da(context,oplval_<name>);\n"); |
| allregs = 0; |
| break; |
| case CLASS_IMM: |
| if (!had_src) |
| { |
| if (p->opcode == OPC_out || |
| p->opcode == OPC_outb || |
| p->opcode == OPC_sout || |
| p->opcode == OPC_soutb) |
| { |
| /* The imm is a dest here */ |
| emit ("register int op_dst = imm_src;\n"); |
| } |
| else |
| { |
| emit ("register int op_src = imm_src;\n"); |
| } |
| } |
| break; |
| case CLASS_REG_QUAD: |
| if (!getdst && IS_DST (*i)) |
| break; |
| had_src |= IS_SRC (*i); |
| emit ("UDItype op_<name> ;\n"); |
| |
| break; |
| case CLASS_REG_WORD: |
| if (!getdst && IS_DST (*i)) |
| break; |
| had_src |= IS_SRC (*i); |
| emit ("register int op_<name> = get_word_reg(context,reg_<name>);\n"); |
| break; |
| |
| case CLASS_REG_LONG: |
| if (!getdst && IS_DST (*i)) |
| break; |
| had_src |= IS_SRC (*i); |
| emit ("register int op_<name> = get_long_reg(context,reg_<name>);\n"); |
| break; |
| case CLASS_REG_BYTE: |
| if (!getdst && IS_DST (*i)) |
| break; |
| had_src |= IS_SRC (*i); |
| emit ("register int op_<name> = get_byte_reg(context,reg_<name>);\n"); |
| break; |
| } |
| i++; |
| } |
| } |
| |
| static void |
| normal_flags (p, s, neg) |
| opcode_entry_type *p; |
| char *s; |
| { |
| emit (" %s;\n", s); |
| emit ("NORMAL_FLAGS(context,%d, tmp, op_dst, op_src,%d); \n", p->type,neg); |
| } |
| |
| static void |
| test_normal_flags (p, s, opt) |
| opcode_entry_type *p; |
| char *s; |
| int opt; |
| { |
| emit (" %s;\n", s); |
| if (0 && opt) |
| { |
| emit ("context->broken_flags = TST_FLAGS;\n"); |
| emit ("context->size = %d;\n", p->type); |
| } |
| else |
| { |
| emit ("TEST_NORMAL_FLAGS(context,%d, tmp); \n", p->type); |
| } |
| |
| } |
| |
| static void |
| optimize_normal_flags (p, s,neg) |
| opcode_entry_type *p; |
| char *s; |
| { |
| emit (" %s;\n", s); |
| #if 0 |
| emit ("context->broken_flags = CMP_FLAGS;\n"); |
| #else |
| emit ("NORMAL_FLAGS(context,%d, tmp, op_dst, op_src,%d); \n", p->type, neg); |
| #endif |
| } |
| |
| static |
| void |
| jp (p) |
| opcode_entry_type *p; |
| { |
| |
| emit ("if(op_cc == 8 || COND(context,op_cc)) pc = oplval_dst;\n"); |
| } |
| |
| static void |
| jr (p) |
| opcode_entry_type *p; |
| { |
| emit ("if(op_cc == 8 || COND(context,op_cc)) pc = oplval_dst;\n"); |
| } |
| |
| static void |
| ret (p) |
| opcode_entry_type *p; |
| { |
| emit ("if(op_cc == 8 || COND(context,op_cc))\n{\n"); |
| emit ("pc = get_<ptr_mode>_<mem>_ir(context,<sp>);\n"); |
| emit ("put_<ptr_mode>_reg(context,<sp>, get_<ptr_mode>_reg(context,<sp>) + <ptr_size>);\n"); |
| emit ("};\n"); |
| } |
| |
| static void |
| call (p) |
| opcode_entry_type *p; |
| { |
| emit ("put_<ptr_mode>_reg(context,<sp>,tmp = get_<ptr_mode>_reg(context,<sp>) - <ptr_size>);\n"); |
| emit ("put_<ptr_mode>_<mem>_da(context,tmp, pc);\n"); |
| emit ("pc = oplval_dst;\n"); |
| } |
| |
| static void |
| push (p) |
| opcode_entry_type *p; |
| { |
| emit ("tmp = op_src;\n"); |
| emit ("oplval_dst -= %d;\n", p->type / 8); |
| emit ("put_<ptr_mode>_reg(context,reg_dst, oplval_dst);\n"); |
| } |
| |
| static void |
| pop (p) |
| opcode_entry_type *p; |
| { |
| emit ("tmp = op_src;\n"); |
| emit ("put_<ptr_mode>_reg(context,reg_src, oplval_src + %d);\n", p->type / 8); |
| } |
| |
| static void |
| ld (p) |
| opcode_entry_type *p; |
| { |
| emit ("tmp = op_src;\n"); |
| } |
| |
| static void |
| sc () |
| { |
| emit ("support_call(context,imm_src);\n"); |
| } |
| |
| static void |
| bpt () |
| { |
| emit ("pc -=2; \n"); |
| emit ("context->exception = SIM_BREAKPOINT;\n"); |
| } |
| |
| static void |
| ldi (p, size, inc) |
| opcode_entry_type *p; |
| int size; |
| int inc; |
| { |
| int dinc = (size / 8) * inc; |
| |
| current_size = size_name (size); |
| emit ("{ \n"); |
| emit ("int type = %s;\n", insn_4 (7)); |
| emit ("int rs = get_<ptr_mode>_reg(context,reg_src);\n"); |
| emit ("int rd = get_<ptr_mode>_reg(context,reg_dst);\n"); |
| emit ("int rr = get_word_reg(context,reg_aux_r);\n"); |
| emit ("do {\n"); |
| emit ("put_<size>_<mem>_da(context,rd, get_<size>_<mem>_da(context,rs));\n"); |
| emit ("rd += %d;\n", dinc); |
| emit ("rs += %d;\n", dinc); |
| emit ("rr --;\n"); |
| emit ("context->cycles += 9;\n"); |
| emit ("} while (!type && rr != 0 && context->exception <= 1);\n"); |
| emit ("if (context->exception>1) pc -=4;\n"); |
| emit ("put_<ptr_mode>_reg(context,reg_src, rs);\n"); |
| emit ("put_<ptr_mode>_reg(context,reg_dst, rd);\n"); |
| emit ("put_word_reg(context,reg_aux_r, rr);\n"); |
| emit ("}\n"); |
| |
| } |
| |
| static void |
| shift (p, arith) |
| opcode_entry_type *p; |
| int arith; |
| { |
| |
| /* We can't use `(char)' since char might be unsigned. |
| We can't use `(signed char)' because the compiler might be K&R. |
| This seems safe, since it only assumes that bytes are 8 bits. */ |
| emit ("op_src = (op_src << (sizeof (int) * 8 - 8)) >> (sizeof (int) * 8 - 8);\n"); |
| #if 0 |
| /* Original code: fails if characters are unsigned. */ |
| emit ("op_src = (char)op_src;\n"); |
| #endif |
| emit ("if (op_src < 0) \n"); |
| emit ("{\n"); |
| emit ("op_src = -op_src;\n"); |
| emit ("op_dst = (%s <c_size>)op_dst;\n", arith ? "" : "unsigned"); |
| emit ("tmp = (%s op_dst) >> op_src;\n", arith ? "" : "(unsigned)"); |
| emit ("context->carry = op_dst >> (op_src-1);\n", p->type); |
| emit ("}\n"); |
| emit ("else\n"); |
| emit ("{\n"); |
| emit ("tmp = op_dst << op_src;\n"); |
| emit ("context->carry = op_dst >> (%d - op_src);\n", p->type); |
| emit ("}\n"); |
| emit ("context->zero = (<c_size>)tmp == 0;\n"); |
| emit ("context->sign = (int)((<c_size>)tmp) < 0;\n"); |
| emit ("context->overflow = ((int)tmp < 0) != ((int)op_dst < 0);\n"); |
| emit ("context->cycles += 3*op_src;\n"); |
| emit ("context->broken_flags = 0;\n"); |
| |
| } |
| |
| static void |
| rotate (p, through_carry, size, left) |
| opcode_entry_type *p; |
| int through_carry; |
| int size; |
| int left; |
| { |
| |
| if (!left) |
| { |
| emit ("while (op_src--) {\n"); |
| emit ("int rotbit;\n"); |
| emit ("rotbit = op_dst & 1;\n"); |
| emit ("op_dst = ((unsigned)op_dst) >> 1;\n"); |
| |
| if (through_carry) |
| { |
| emit ("op_dst |= context->carry << %d;\n", size - 1); |
| } |
| else |
| { |
| emit ("op_dst |= rotbit << %d;\n", size - 1); |
| } |
| emit ("context->carry = rotbit;\n"); |
| emit ("}\n"); |
| } |
| else |
| { |
| emit ("while (op_src--) {\n"); |
| emit ("int rotbit;\n"); |
| |
| emit ("rotbit = (op_dst >> (%d))&1;\n", size - 1); |
| emit ("op_dst <<=1;\n"); |
| if (through_carry) |
| { |
| emit ("if (context->carry) op_dst |=1;\n"); |
| } |
| else |
| { |
| emit ("if (rotbit) op_dst |= 1;\n"); |
| } |
| emit ("context->carry = rotbit;\n"); |
| emit ("}\n"); |
| } |
| emit ("tmp = (<c_size>)op_dst;\n"); |
| emit ("context->zero = tmp == 0;\n"); |
| emit ("context->sign = (int)tmp < 0;\n"); |
| emit ("context->overflow = ((int)tmp < 0) != ((int)op_dst < 0);\n"); |
| emit ("context->cycles += 3*op_src;\n"); |
| emit ("context->broken_flags = 0;\n"); |
| |
| } |
| |
| static void |
| adiv (p) |
| opcode_entry_type *p; |
| { |
| emit ("if (op_src==0)\n"); |
| emit ("{\n"); |
| emit ("context->exception = SIM_DIV_ZERO;\n"); |
| emit ("}\n"); |
| emit ("else\n"); |
| emit ("{\n"); |
| |
| if (p->type == 32) |
| { |
| emit ("op_dst.low = (int)get_long_reg(context,reg_dst+2);\n"); |
| emit ("op_dst.high = (int)get_long_reg(context,reg_dst+0);\n"); |
| #ifdef __GNUC__ |
| emit ("tmp = (((long long)op_dst.high << 32) + (op_dst.low)) / (int)op_src;\n"); |
| #else |
| emit ("tmp = (long)op_dst.low / (int)op_src;\n"); |
| #endif |
| emit ("put_long_reg(context,reg_dst+2, tmp);\n"); |
| #ifdef __GNUC__ |
| emit ("put_long_reg(context,reg_dst, (((long long)op_dst.high << 32) + (op_dst.low)) %% (int)op_src);\n"); |
| #else |
| emit ("put_long_reg(context,reg_dst, (int)op_dst.low %% (int)op_src);\n"); |
| #endif |
| |
| emit ("context->zero = op_src == 0 || (op_dst.low==0 && op_dst.high==0);\n"); |
| } |
| else |
| { |
| emit ("tmp = (long)op_dst / (short)op_src;\n"); |
| emit ("put_word_reg(context,reg_dst+1, tmp);\n"); |
| emit ("put_word_reg(context,reg_dst, (long) op_dst %% (short)op_src);\n"); |
| emit ("context->zero = op_src == 0 || op_dst==0;\n"); |
| } |
| |
| emit ("context->sign = (int)tmp < 0;\n"); |
| emit ("context->overflow =(tmp & 0x%x) != 0;\n", |
| ~((1 << (p->type)) - 1)); |
| emit ("context->carry = (tmp & 0x%x) != 0;\n", |
| ~(1 << (p->type))); |
| |
| emit ("}\n"); |
| } |
| |
| static void |
| dobit (p) |
| opcode_entry_type *p; |
| { |
| emit("context->zero = (op_dst & (1<<op_src))==0;\n"); |
| emit("context->broken_flags = 0;\n"); |
| } |
| static void |
| doset (p, v) |
| opcode_entry_type*p; |
| int v; |
| { |
| if (v) |
| emit (" tmp = op_dst | (1<< op_src);\n"); |
| else |
| emit (" tmp = op_dst & ~(1<< op_src);\n"); |
| } |
| |
| static void |
| mult (p) |
| opcode_entry_type *p; |
| { |
| |
| if (p->type == 32) |
| { |
| emit ("op_dst.low = get_long_reg(context,reg_dst+2);\n"); |
| emit ("tmp = op_dst.low * op_src;\n"); |
| emit ("put_long_reg(context,reg_dst+2, tmp);\n"); |
| emit ("put_long_reg(context,reg_dst, 0);\n"); |
| } |
| else |
| { |
| emit ("op_dst = get_word_reg(context,reg_dst+1);\n"); |
| emit ("tmp = op_dst * op_src;\n"); |
| emit ("put_long_reg(context,reg_dst, tmp);\n"); |
| } |
| |
| emit ("context->sign = (int)tmp < 0;\n"); |
| emit ("context->overflow =0;\n"); |
| emit ("context->carry = (tmp & 0x%x) != 0;\n", ~((1 << (p->type)) - 1)); |
| emit ("context->zero = tmp == 0;\n"); |
| |
| } |
| |
| static void |
| exts (p) |
| opcode_entry_type *p; |
| { |
| /* Fetch the ls part of the src */ |
| current_size = size_name (p->type * 2); |
| |
| if (p->type == 32) |
| { |
| emit ("tmp= get_long_reg(context,reg_dst+2);\n"); |
| emit ("if (tmp & (1<<%d)) {\n", p->type - 1); |
| emit ("put_long_reg(context,reg_dst, 0xffffffff);\n"); |
| emit ("}\n"); |
| emit ("else\n"); |
| emit ("{\n"); |
| emit ("put_long_reg(context,reg_dst, 0);\n"); |
| emit ("}\n"); |
| } |
| else |
| { |
| emit ("tmp= get_<size>_reg(context,reg_dst);\n"); |
| emit ("if (tmp & (1<<%d)) {\n", p->type - 1); |
| emit ("tmp |= 0x%x;\n", ~((1 << p->type) - 1)); |
| emit ("}\n"); |
| emit ("else\n"); |
| emit ("{\n"); |
| |
| emit ("tmp &= 0x%x;\n", ((1 << p->type) - 1)); |
| emit ("}\n"); |
| emit ("put_<size>_reg(context,reg_dst, tmp);\n"); |
| } |
| } |
| doflag(on) |
| int on; |
| { |
| /* Load up the flags */ |
| emit(" COND (context, 0x0b);\n"); |
| |
| if (on) |
| emit ("{ int on =1;\n "); |
| else |
| emit ("{ int on =0;\n "); |
| |
| emit ("if (imm_src & 1)\n"); |
| emit ("PSW_OVERFLOW = on;\n"); |
| |
| emit ("if (imm_src & 2)\n"); |
| emit ("PSW_SIGN = on;\n"); |
| |
| emit ("if (imm_src & 4)\n"); |
| emit ("PSW_ZERO = on;\n"); |
| |
| emit ("if (imm_src & 8)\n"); |
| emit ("PSW_CARRY = on;\n"); |
| emit("}\n"); |
| |
| |
| } |
| /* emit code to perform operation */ |
| void |
| info_docode (p) |
| opcode_entry_type *p; |
| { |
| switch (p->opcode) |
| { |
| case OPC_clr: |
| case OPC_clrb: |
| emit ("tmp = 0;\n"); |
| break; |
| case OPC_ex: |
| case OPC_exb: |
| |
| emit ("tmp = op_src; \n"); |
| if (allregs) |
| { |
| emit ("put_<size>_reg(context,reg_src, op_dst);\n"); |
| } |
| else |
| { |
| emit ("put_<size>_mem_da(context, oplval_src, op_dst);\n"); |
| } |
| break; |
| case OPC_adc: |
| case OPC_adcb: |
| normal_flags (p, "op_src += COND(context,7);tmp = op_dst + op_src ;",0); |
| break; |
| case OPC_sbc: |
| normal_flags (p, "op_src += COND(context,7);tmp = op_dst - op_src ;",1); |
| break; |
| case OPC_nop: |
| break; |
| case OPC_com: |
| case OPC_comb: |
| test_normal_flags (p, "tmp = ~ op_dst", 1); |
| break; |
| case OPC_and: |
| case OPC_andb: |
| test_normal_flags (p, "tmp = op_dst & op_src", 1); |
| break; |
| case OPC_xor: |
| case OPC_xorb: |
| test_normal_flags (p, "tmp = op_dst ^ op_src", 1); |
| break; |
| case OPC_or: |
| case OPC_orb: |
| test_normal_flags (p, "tmp = op_dst | op_src", 1); |
| break; |
| case OPC_sla: |
| case OPC_slab: |
| case OPC_slal: |
| case OPC_sda: |
| case OPC_sdab: |
| case OPC_sdal: |
| shift (p, 1); |
| break; |
| |
| case OPC_sll: |
| case OPC_sllb: |
| case OPC_slll: |
| case OPC_sdl: |
| case OPC_sdlb: |
| case OPC_sdll: |
| shift (p, 0); |
| break; |
| case OPC_rl: |
| rotate (p, 0, 16, 1); |
| break; |
| case OPC_rlb: |
| rotate (p, 0, 8, 1); |
| break; |
| case OPC_rr: |
| rotate (p, 0, 16, 0); |
| break; |
| case OPC_rrb: |
| rotate (p, 0, 8, 0); |
| break; |
| case OPC_rrc: |
| rotate (p, 1, 16, 0); |
| break; |
| case OPC_rrcb: |
| rotate (p, 1, 8, 0); |
| break; |
| case OPC_rlc: |
| rotate (p, 1, 16, 1); |
| break; |
| case OPC_rlcb: |
| rotate (p, 1, 8, 1); |
| break; |
| |
| case OPC_extsb: |
| case OPC_exts: |
| case OPC_extsl: |
| exts (p); |
| break; |
| case OPC_add: |
| case OPC_addb: |
| case OPC_addl: |
| case OPC_inc: |
| case OPC_incb: |
| optimize_normal_flags (p, "tmp = op_dst + op_src",0); |
| break; |
| case OPC_testb: |
| case OPC_test: |
| case OPC_testl: |
| test_normal_flags (p, "tmp = op_dst", 0); |
| break; |
| case OPC_cp: |
| case OPC_cpb: |
| case OPC_cpl: |
| normal_flags (p, "tmp = op_dst - op_src",1); |
| break; |
| case OPC_negb: |
| case OPC_neg: |
| emit ("{\n"); |
| emit ("int op_src = -op_dst;\n"); |
| emit ("op_dst = 0;\n"); |
| optimize_normal_flags (p, "tmp = op_dst + op_src;\n",1); |
| emit ("}"); |
| break; |
| |
| case OPC_sub: |
| case OPC_subb: |
| case OPC_subl: |
| case OPC_dec: |
| case OPC_decb: |
| optimize_normal_flags (p, "tmp = op_dst - op_src",1); |
| break; |
| case OPC_bpt: |
| bpt (); |
| break; |
| case OPC_jr: |
| jr (p); |
| break; |
| case OPC_sc: |
| sc (); |
| break; |
| case OPC_jp: |
| jp (p); |
| break; |
| case OPC_ret: |
| ret (p); |
| break; |
| case OPC_call: |
| call (p); |
| break; |
| case OPC_tcc: |
| case OPC_tccb: |
| emit ("if(op_cc == 8 || COND(context,op_cc)) put_word_reg(context,reg_dst, 1);\n"); |
| break; |
| case OPC_lda: |
| emit ("tmp = oplval_src; \n"); |
| /*(((oplval_src) & 0xff0000) << 8) | (oplval_src & 0xffff); \n");*/ |
| break; |
| case OPC_ldk: |
| case OPC_ld: |
| |
| case OPC_ldb: |
| case OPC_ldl: |
| ld (p); |
| break; |
| case OPC_ldib: |
| ldi (p, 8, 1); |
| break; |
| case OPC_ldi: |
| ldi (p, 16, 1); |
| break; |
| |
| case OPC_lddb: |
| ldi (p, 8, -1); |
| break; |
| case OPC_ldd: |
| ldi (p, 16, -1); |
| break; |
| |
| case OPC_push: |
| case OPC_pushl: |
| push (p); |
| break; |
| |
| case OPC_div: |
| case OPC_divl: |
| adiv (p); |
| break; |
| case OPC_mult: |
| case OPC_multl: |
| mult (p); |
| break; |
| case OPC_pop: |
| case OPC_popl: |
| pop (p); |
| break; |
| case OPC_set: |
| doset (p,1); |
| break; |
| case OPC_res: |
| doset (p,0); |
| break; |
| case OPC_bit: |
| dobit(p); |
| break; |
| case OPC_resflg: |
| doflag(0); |
| break; |
| case OPC_setflg: |
| doflag(1); |
| break; |
| default: |
| |
| emit ("tmp = fail(context,%d);\n", p->opcode); |
| break; |
| } |
| } |
| |
| /* emit code to store result in calculated lvalue */ |
| |
| void |
| info_store (p) |
| opcode_entry_type *p; |
| { |
| unsigned int *i = p->arg_info; |
| |
| while (*i) |
| { |
| current_name = reg_n (*i); |
| current_size = size_name (p->type); |
| |
| if (IS_DST (*i)) |
| { |
| switch (*i & CLASS_MASK) |
| { |
| case CLASS_PR: |
| emit ("put_<ptr_mode>_reg(context,reg_<name>, tmp);\n"); |
| break; |
| case CLASS_REG_LONG: |
| case CLASS_REG_WORD: |
| case CLASS_REG_BYTE: |
| |
| emit ("put_<size>_reg(context,reg_<name>,tmp);\n"); |
| break; |
| case CLASS_X: |
| case CLASS_IR: |
| case CLASS_DA: |
| case CLASS_BX: |
| case CLASS_BA: |
| |
| emit ("put_<size>_<mem>_da(context,oplval_<name>, tmp);\n"); |
| break; |
| case CLASS_IMM: |
| break; |
| default: |
| emit ("abort(); "); |
| break; |
| } |
| |
| } |
| i++; |
| } |
| } |
| |
| static |
| void |
| mangle (p, shortcut, value) |
| opcode_entry_type *p; |
| int shortcut; |
| int value; |
| { |
| int nostore = 0; |
| int extra; |
| int getdst = 1; |
| int before = 0; |
| int nosrc = 0; |
| |
| emit ("/\052 %s \052/\n", p->nicename); |
| if (shortcut) |
| { |
| emit ("int <fop>_%04x(context,pc)\n", value); |
| } |
| else |
| { |
| emit ("int <fop>_%d(context,pc,iwords0)\n", p->idx); |
| emit ("int iwords0;\n"); |
| } |
| emit ("sim_state_type *context;\n"); |
| emit ("int pc;\n"); |
| emit ("{\n"); |
| emit ("register unsigned int tmp;\n"); |
| if (shortcut) |
| { |
| emit ("register unsigned int iwords0 = 0x%x;\n", value); |
| } |
| |
| /* work out how much bigger this opcode could be because it's large |
| model */ |
| if (BIG) |
| { |
| int i; |
| |
| extra = 0; |
| for (i = 0; i < 4; i++) |
| { |
| if ((p->arg_info[i] & CLASS_MASK) == CLASS_DA |
| || (p->arg_info[i] & CLASS_MASK) == CLASS_X) |
| extra += 2; |
| } |
| } |
| else |
| { |
| extra = 0; |
| } |
| printf (" /* Length %d */ \n", p->length + extra); |
| switch (p->length + extra) |
| { |
| case 2: |
| emit ("pc += 2\n;"); |
| break; |
| case 4: |
| emit ("register unsigned int iwords1 = get_word_mem_da(context,pc+2);\n"); |
| emit ("pc += 4;\n"); |
| break; |
| case 6: |
| |
| emit ("register unsigned int iwords1 = get_word_mem_da(context,pc+2);\n"); |
| emit ("register unsigned int iwords2 = get_word_mem_da(context,pc+4);\n"); |
| emit ("pc += 6;\n"); |
| break; |
| case 8: |
| emit ("register unsigned int iwords1 = get_word_mem_da(context,pc+2);\n"); |
| emit ("register unsigned int iwords2 = get_word_mem_da(context,pc+4);\n"); |
| emit ("register unsigned int iwords3 = get_word_mem_da(context,pc+6);\n"); |
| emit ("pc += 8;\n"); |
| break; |
| default: |
| break; |
| |
| } |
| emit ("context->cycles += %d;\n", p->cycles); |
| |
| emit ("{\n"); |
| info_args (p); |
| info_special (p, &getdst, &nostore, &before, &nosrc); |
| |
| info_lvals (p); |
| if (!nosrc) |
| { |
| info_fetch (p, getdst); |
| } |
| |
| if (before) |
| { |
| info_docode (p); |
| } |
| else |
| { |
| info_docode (p); |
| } |
| if (!nostore) |
| info_store (p); |
| emit ("}\n"); |
| emit ("return pc;\n"); |
| emit ("}\n"); |
| } |
| |
| void |
| static |
| one_instruction (i) |
| int i; |
| { |
| /* find the table entry */ |
| opcode_entry_type *p = z8k_table + i; |
| |
| if (!p) |
| return; |
| mangle (p, 0, 0); |
| } |
| |
| void |
| add_to_list (ptr, value) |
| struct opcode_value **ptr; |
| int value; |
| { |
| struct opcode_value *prev; |
| |
| prev = *ptr; |
| *ptr = (struct opcode_value *) malloc (sizeof (struct opcode_value)); |
| |
| (*ptr)->n = value; |
| (*ptr)->next = prev; |
| } |
| |
| void |
| build_list (i) |
| int i; |
| { |
| opcode_entry_type *p = lookup_inst (i); |
| |
| if (!p) |
| return; |
| add_to_list (&list[p->idx], i); |
| } |
| |
| int |
| main (ac, av) |
| int ac; |
| char **av; |
| { |
| int i; |
| int needcomma = 0; |
| |
| makelist = 0; |
| |
| for (i = 1; i < ac; i++) |
| { |
| if (strcmp (av[i], "-m") == 0) |
| makelist = 1; |
| if (strcmp (av[i], "-1") == 0) |
| file = 1; |
| if (strcmp (av[i], "-2") == 0) |
| file = 2; |
| if (strcmp (av[i], "-3") == 0) |
| file = 3; |
| if (strcmp (av[i], "-b3") == 0) |
| { |
| file = 3; |
| BIG = 1; |
| } |
| |
| } |
| if (makelist) |
| { |
| |
| int i; |
| needcomma = 0; |
| printf ("short int z8k_inv_list[] = {\n"); |
| |
| for (i = 0; i < 1 << 16; i++) |
| { |
| opcode_entry_type *p = lookup_inst (i); |
| |
| if(needcomma) |
| printf(","); |
| if ((i & 0xf) == 0) |
| printf ("\n"); |
| |
| #if 0 |
| printf ("\n /*%04x %s */", i, p ? p->nicename : ""); |
| #endif |
| |
| if (!p) |
| { |
| printf ("-1"); |
| } |
| else |
| { |
| printf ("%d", p->idx); |
| } |
| |
| if ((i & 0x3f) == 0 && DIRTY_HACK) |
| { |
| printf ("\n#ifdef __GNUC__\n"); |
| printf ("};\n"); |
| printf("short int int_list%d[] = {\n", i); |
| printf ("#else\n"); |
| printf (",\n"); |
| printf ("#endif\n"); |
| needcomma = 0; |
| } |
| else |
| needcomma = 1; |
| |
| } |
| printf ("};\n"); |
| return 1; |
| } |
| |
| /* First work out which opcodes use which bit patterns, |
| build a list of all matching bit pattens */ |
| for (i = 0; i < 1 << 16; i++) |
| { |
| build_list (i); |
| } |
| #if DUMP_LIST |
| for (i = 0; i < NOPS; i++) |
| { |
| struct opcode_value *p; |
| |
| printf ("%d,", i); |
| p = list[i]; |
| while (p) |
| { |
| printf (" %04x,", p->n); |
| p = p->next; |
| } |
| printf ("-1\n"); |
| } |
| |
| #endif |
| |
| if (file == 1) |
| { |
| extern int quick[]; |
| |
| /* Do the shortcuts */ |
| printf (" /* SHORTCUTS */\n"); |
| for (i = 0; quick[i]; i++) |
| { |
| int t = quick[i]; |
| |
| mangle (z8k_table + z8k_inv_list[t], |
| 1, |
| t); |
| } |
| } |
| if (file == 3) |
| { |
| printf (" /* NOT -SHORTCUTS */\n"); |
| for (i = 0; i < NOPS; i++) |
| { |
| if (list[i]) |
| { |
| one_instruction (i); |
| } |
| else |
| { |
| emit ("int <fop>_%d(context,pc)\n", i); |
| printf ("sim_state_type *context;\n"); |
| printf ("int pc;\n"); |
| emit ("{ <fop>_bad1();return pc; }\n"); |
| } |
| } |
| emit ("int <fop>_bad() ;\n"); |
| |
| /* Write the jump table */ |
| emit ("int (*(<fop>_table[]))() = {"); |
| needcomma = 0; |
| for (i = 0; i < NOPS; i++) |
| { |
| if (needcomma) |
| printf (","); |
| emit ("<fop>_%d\n", i); |
| needcomma = 1; |
| if ((i & 0x3f) == 0 && DIRTY_HACK) |
| { |
| printf ("#ifdef __GNUC__\n"); |
| printf ("};\n"); |
| emit ("int (*(<fop>_table%d[]))() = {\n", i); |
| printf ("#else\n"); |
| printf (",\n"); |
| printf ("#endif\n"); |
| needcomma = 0; |
| } |
| } |
| emit ("};\n"); |
| } |
| |
| if (file == 2) |
| { |
| extern int quick[]; |
| /* Static - since it's too be to be automatic on the apollo */ |
| static int big[64 * 1024]; |
| |
| for (i = 0; i < 64 * 1024; i++) |
| big[i] = 0; |
| |
| for (i = 0; quick[i]; i++) |
| { |
| #if 0 |
| |
| printf ("extern int <fop>_%04x();\n", quick[i]); |
| #endif |
| |
| big[quick[i]] = 1; |
| } |
| |
| for (i = 0; i < NOPS; i++) |
| { |
| #if 0 |
| printf ("extern int fop_%d();\n", i); |
| #endif |
| } |
| #if 0 |
| printf ("extern int fop_bad();\n"); |
| #endif |
| printf ("struct op_info op_info_table[] = {\n"); |
| for (i = 0; i < 1 << 16; i++) |
| { |
| int inv = z8k_inv_list[i]; |
| opcode_entry_type *p = z8k_table + inv; |
| |
| if (needcomma) |
| printf (","); |
| #if 0 |
| if (big[i]) |
| { |
| printf ("<fop>_%04x", i); |
| } |
| else |
| #endif |
| if (inv >= 0) |
| { |
| printf ("%d", inv); |
| } |
| else |
| printf ("400"); |
| if (inv >= 0) |
| { |
| printf (" /* %04x %s */\n", i, p->nicename); |
| } |
| else |
| { |
| printf ("\n"); |
| } |
| needcomma = 1; |
| if ((i & 0x3f) == 0 && DIRTY_HACK) |
| { |
| printf ("#ifdef __GNUC__\n"); |
| printf ("}; \n"); |
| printf ("struct op_info op_info_table%d[] = {\n", i); |
| printf ("#else\n"); |
| printf (",\n"); |
| |
| printf ("#endif\n"); |
| needcomma = 0; |
| } |
| } |
| printf ("};\n"); |
| |
| } |
| return 0; |
| } |
| |
| char * |
| insn_ptr (n) |
| int n; |
| { |
| if (BIG) |
| { |
| abort (); |
| } |
| |
| switch (n) |
| { |
| case 4: |
| return "iwords_1"; |
| default: |
| return "fail(context,123)"; |
| } |
| } |
| |
| /* work out if the opcode only wants lvalues */ |
| int |
| lvalue (p) |
| opcode_entry_type *p; |
| { |
| switch (p->opcode) |
| { |
| case OPC_lda: |
| return 1; |
| case OPC_call: |
| case OPC_jp: |
| return 1; |
| default: |
| return 0; |
| } |
| } |
| |
| int |
| info_len_in_words (o) |
| opcode_entry_type *o; |
| { |
| unsigned int *p = o->byte_info; |
| int nibs = 0; |
| |
| while (*p) |
| { |
| switch (*p & CLASS_MASK) |
| { |
| case CLASS_BIT: |
| case CLASS_REGN0: |
| case CLASS_REG: |
| case CLASS_01II: |
| case CLASS_00II: |
| nibs++; |
| break; |
| case CLASS_ADDRESS: |
| nibs += SIZE_ADDRESS; |
| break; |
| case CLASS_IMM: |
| switch (*p & ~CLASS_MASK) |
| { |
| case ARG_IMM16: |
| nibs += 4; |
| break; |
| case ARG_IMM32: |
| nibs += 8; |
| break; |
| case ARG_IMM2: |
| case ARG_IMM4: |
| case ARG_IMM4M1: |
| case ARG_IMM_1: |
| case ARG_IMM_2: |
| case ARG_IMMNMINUS1: |
| nibs++; |
| break; |
| case ARG_NIM8: |
| |
| case ARG_IMM8: |
| nibs += 2; |
| break; |
| default: |
| abort (); |
| } |
| break; |
| case CLASS_DISP: |
| switch (*p & ~CLASS_MASK) |
| { |
| case ARG_DISP16: |
| nibs += 4; |
| break; |
| case ARG_DISP12: |
| nibs += 3; |
| break; |
| case ARG_DISP8: |
| nibs += 2; |
| break; |
| default: |
| abort (); |
| } |
| break; |
| case CLASS_0DISP7: |
| case CLASS_1DISP7: |
| case CLASS_DISP8: |
| nibs += 2; |
| break; |
| case CLASS_BIT_1OR2: |
| case CLASS_0CCC: |
| case CLASS_1CCC: |
| case CLASS_CC: |
| nibs++; |
| break; |
| default: |
| emit ("don't know %x\n", *p); |
| } |
| p++; |
| } |
| |
| return nibs / 4; /* return umber of words */ |
| } |