| /* |
| * LC-3b architecture description |
| * |
| * Copyright (C) 2003-2007 Peter Johnson |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND OTHER CONTRIBUTORS ``AS IS'' |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR OTHER CONTRIBUTORS BE |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| */ |
| #include <util.h> |
| /*@unused@*/ RCSID("$Id: lc3barch.c,v 1.1.1.1 2012/03/29 17:21:01 uid42307 Exp $"); |
| |
| #include <libyasm.h> |
| |
| #include "lc3barch.h" |
| |
| |
| yasm_arch_module yasm_lc3b_LTX_arch; |
| |
| |
| static /*@only@*/ yasm_arch * |
| lc3b_create(const char *machine, const char *parser, |
| /*@out@*/ yasm_arch_create_error *error) |
| { |
| yasm_arch_base *arch; |
| |
| *error = YASM_ARCH_CREATE_OK; |
| |
| if (yasm__strcasecmp(machine, "lc3b") != 0) { |
| *error = YASM_ARCH_CREATE_BAD_MACHINE; |
| return NULL; |
| } |
| |
| if (yasm__strcasecmp(parser, "nasm") != 0) { |
| *error = YASM_ARCH_CREATE_BAD_PARSER; |
| return NULL; |
| } |
| |
| arch = yasm_xmalloc(sizeof(yasm_arch_base)); |
| arch->module = &yasm_lc3b_LTX_arch; |
| return (yasm_arch *)arch; |
| } |
| |
| static void |
| lc3b_destroy(/*@only@*/ yasm_arch *arch) |
| { |
| yasm_xfree(arch); |
| } |
| |
| static const char * |
| lc3b_get_machine(/*@unused@*/ const yasm_arch *arch) |
| { |
| return "lc3b"; |
| } |
| |
| static unsigned int |
| lc3b_get_address_size(/*@unused@*/ const yasm_arch *arch) |
| { |
| return 16; |
| } |
| |
| static int |
| lc3b_set_var(yasm_arch *arch, const char *var, unsigned long val) |
| { |
| return 1; |
| } |
| |
| static const unsigned char ** |
| lc3b_get_fill(const yasm_arch *arch) |
| { |
| /* NOP pattern is all 0's per LC-3b Assembler 3.50 output */ |
| static const unsigned char *fill[16] = { |
| NULL, /* unused */ |
| NULL, /* 1 - illegal; all opcodes are 2 bytes long */ |
| (const unsigned char *) |
| "\x00\x00", /* 4 */ |
| NULL, /* 3 - illegal */ |
| (const unsigned char *) |
| "\x00\x00\x00\x00", /* 4 */ |
| NULL, /* 5 - illegal */ |
| (const unsigned char *) |
| "\x00\x00\x00\x00\x00\x00", /* 6 */ |
| NULL, /* 7 - illegal */ |
| (const unsigned char *) |
| "\x00\x00\x00\x00\x00\x00" /* 8 */ |
| "\x00\x00", |
| NULL, /* 9 - illegal */ |
| (const unsigned char *) |
| "\x00\x00\x00\x00\x00\x00" /* 10 */ |
| "\x00\x00\x00\x00", |
| NULL, /* 11 - illegal */ |
| (const unsigned char *) |
| "\x00\x00\x00\x00\x00\x00" /* 12 */ |
| "\x00\x00\x00\x00\x00\x00", |
| NULL, /* 13 - illegal */ |
| (const unsigned char *) |
| "\x00\x00\x00\x00\x00\x00" /* 14 */ |
| "\x00\x00\x00\x00\x00\x00\x00\x00", |
| NULL /* 15 - illegal */ |
| }; |
| return fill; |
| } |
| |
| static unsigned int |
| lc3b_get_reg_size(/*@unused@*/ yasm_arch *arch, /*@unused@*/ uintptr_t reg) |
| { |
| return 16; |
| } |
| |
| static uintptr_t |
| lc3b_reggroup_get_reg(/*@unused@*/ yasm_arch *arch, |
| /*@unused@*/ uintptr_t reggroup, |
| /*@unused@*/ unsigned long regindex) |
| { |
| return 0; |
| } |
| |
| static void |
| lc3b_reg_print(/*@unused@*/ yasm_arch *arch, uintptr_t reg, FILE *f) |
| { |
| fprintf(f, "r%u", (unsigned int)(reg&7)); |
| } |
| |
| static int |
| lc3b_floatnum_tobytes(yasm_arch *arch, const yasm_floatnum *flt, |
| unsigned char *buf, size_t destsize, size_t valsize, |
| size_t shift, int warn) |
| { |
| yasm_error_set(YASM_ERROR_FLOATING_POINT, |
| N_("LC-3b does not support floating point")); |
| return 1; |
| } |
| |
| static yasm_effaddr * |
| lc3b_ea_create_expr(yasm_arch *arch, yasm_expr *e) |
| { |
| yasm_effaddr *ea = yasm_xmalloc(sizeof(yasm_effaddr)); |
| yasm_value_initialize(&ea->disp, e, 0); |
| ea->need_nonzero_len = 0; |
| ea->need_disp = 1; |
| ea->nosplit = 0; |
| ea->strong = 0; |
| ea->segreg = 0; |
| ea->pc_rel = 0; |
| ea->not_pc_rel = 0; |
| return ea; |
| } |
| |
| void |
| yasm_lc3b__ea_destroy(/*@only@*/ yasm_effaddr *ea) |
| { |
| yasm_value_delete(&ea->disp); |
| yasm_xfree(ea); |
| } |
| |
| static void |
| lc3b_ea_print(const yasm_effaddr *ea, FILE *f, int indent_level) |
| { |
| fprintf(f, "%*sDisp:\n", indent_level, ""); |
| yasm_value_print(&ea->disp, f, indent_level+1); |
| } |
| |
| /* Define lc3b machines -- see arch.h for details */ |
| static yasm_arch_machine lc3b_machines[] = { |
| { "LC-3b", "lc3b" }, |
| { NULL, NULL } |
| }; |
| |
| /* Define arch structure -- see arch.h for details */ |
| yasm_arch_module yasm_lc3b_LTX_arch = { |
| "LC-3b", |
| "lc3b", |
| NULL, |
| lc3b_create, |
| lc3b_destroy, |
| lc3b_get_machine, |
| lc3b_get_address_size, |
| lc3b_set_var, |
| yasm_lc3b__parse_check_insnprefix, |
| yasm_lc3b__parse_check_regtmod, |
| lc3b_get_fill, |
| lc3b_floatnum_tobytes, |
| yasm_lc3b__intnum_tobytes, |
| lc3b_get_reg_size, |
| lc3b_reggroup_get_reg, |
| lc3b_reg_print, |
| NULL, /*yasm_lc3b__segreg_print*/ |
| lc3b_ea_create_expr, |
| yasm_lc3b__ea_destroy, |
| lc3b_ea_print, |
| yasm_lc3b__create_empty_insn, |
| lc3b_machines, |
| "lc3b", |
| 16, |
| 2 |
| }; |
