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author | Andrew Cagney <cagney@redhat.com> | 2004-11-12 16:45:32 +0000 |
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committer | Andrew Cagney <cagney@redhat.com> | 2004-11-12 16:45:32 +0000 |
commit | c46ec85da270994b50ccc5c8de0f1751cf3a0683 (patch) | |
tree | a5941765ceb8c03216c7a82f0a9f92c02b368a39 /sim/z8k/writecode.c | |
parent | 4fab48b9c48377889af365990e148954c3343287 (diff) | |
download | gdb-c46ec85da270994b50ccc5c8de0f1751cf3a0683.zip gdb-c46ec85da270994b50ccc5c8de0f1751cf3a0683.tar.gz gdb-c46ec85da270994b50ccc5c8de0f1751cf3a0683.tar.bz2 |
2004-11-12 Andrew Cagney <cagney@gnu.org>
* d30v, fr30, mn10200, z8k: Delete directory.
Diffstat (limited to 'sim/z8k/writecode.c')
-rw-r--r-- | sim/z8k/writecode.c | 1948 |
1 files changed, 0 insertions, 1948 deletions
diff --git a/sim/z8k/writecode.c b/sim/z8k/writecode.c deleted file mode 100644 index acff7c4..0000000 --- a/sim/z8k/writecode.c +++ /dev/null @@ -1,1948 +0,0 @@ -/* generate instructions for Z8KSIM - - Copyright 1992, 1993, 2002 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 - - */ - -/* 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 - -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 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; -{ - static short *z8k_inv_list = NULL; - const nr_z8k_inv_list_elements = 1 << 16; - if (z8k_inv_list == NULL) - { - /* Initialize the list to 0xff == -1 */ - z8k_inv_list = calloc (nr_z8k_inv_list_elements, sizeof (short)); - memset (z8k_inv_list, 0xff, nr_z8k_inv_list_elements * sizeof (short)); - } - /* Entry empty? Fill it in. */ - if (z8k_inv_list[what] == -1) - { - - 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; - - /* Assume it won't be found. */ - z8k_inv_list[what] = -2; - - 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_IGNORE: - 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) - { - z8k_inv_list[what] = ptr->idx; - break; /* while */ - } - ptr++; - } - } - if (z8k_inv_list[what] >= 0) - return z8k_table + z8k_inv_list[what]; - return 0; -} - -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_IGNORE: - 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_NIM4: - 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; - - for (i = 1; i < ac; i++) - { - 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; - } - - } - - /* 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 (lookup_inst (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; - } - 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++) - { - opcode_entry_type *p = lookup_inst (i); - - if (needcomma) - printf (","); -#if 0 - if (big[i]) - { - printf ("<fop>_%04x", i); - } - else -#endif - if (p != NULL) - { - printf ("%d", p->idx); - } - else - printf ("400"); - if (p != NULL) - { - printf (" /* %04x %s */\n", i, p->nicename); - } - else - { - printf ("\n"); - } - needcomma = 1; - } - 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_IGNORE: - 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_NIM4: - 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 */ -} |