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-rw-r--r--disas/moxie.c360
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diff --git a/disas/moxie.c b/disas/moxie.c
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--- a/disas/moxie.c
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-/* Disassemble moxie instructions.
- Copyright (c) 2009 Free Software Foundation, Inc.
-
- This program 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 of the License, or
- (at your option) any later version.
-
- This program 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 this program; if not, see <http://www.gnu.org/licenses/>. */
-
-#include "qemu/osdep.h"
-#define STATIC_TABLE
-#define DEFINE_TABLE
-
-#include "disas/dis-asm.h"
-
-static void *stream;
-
-/* Form 1 instructions come in different flavors:
-
- Some have no arguments (MOXIE_F1_NARG)
- Some only use the A operand (MOXIE_F1_A)
- Some use A and B registers (MOXIE_F1_AB)
- Some use A and consume a 4 byte immediate value (MOXIE_F1_A4)
- Some use just a 4 byte immediate value (MOXIE_F1_4)
- Some use just a 4 byte memory address (MOXIE_F1_M)
- Some use B and an indirect A (MOXIE_F1_AiB)
- Some use A and an indirect B (MOXIE_F1_ABi)
- Some consume a 4 byte immediate value and use X (MOXIE_F1_4A)
- Some use B and an indirect A plus 4 bytes (MOXIE_F1_AiB4)
- Some use A and an indirect B plus 4 bytes (MOXIE_F1_ABi4)
-
- Form 2 instructions also come in different flavors:
-
- Some have no arguments (MOXIE_F2_NARG)
- Some use the A register and an 8-bit value (MOXIE_F2_A8V)
-
- Form 3 instructions also come in different flavors:
-
- Some have no arguments (MOXIE_F3_NARG)
- Some have a 10-bit PC relative operand (MOXIE_F3_PCREL). */
-
-#define MOXIE_F1_NARG 0x100
-#define MOXIE_F1_A 0x101
-#define MOXIE_F1_AB 0x102
-/* #define MOXIE_F1_ABC 0x103 */
-#define MOXIE_F1_A4 0x104
-#define MOXIE_F1_4 0x105
-#define MOXIE_F1_AiB 0x106
-#define MOXIE_F1_ABi 0x107
-#define MOXIE_F1_4A 0x108
-#define MOXIE_F1_AiB4 0x109
-#define MOXIE_F1_ABi4 0x10a
-#define MOXIE_F1_M 0x10b
-
-#define MOXIE_F2_NARG 0x200
-#define MOXIE_F2_A8V 0x201
-
-#define MOXIE_F3_NARG 0x300
-#define MOXIE_F3_PCREL 0x301
-
-typedef struct moxie_opc_info_t {
- short opcode;
- unsigned itype;
- const char * name;
-} moxie_opc_info_t;
-
-extern const moxie_opc_info_t moxie_form1_opc_info[64];
-extern const moxie_opc_info_t moxie_form2_opc_info[4];
-extern const moxie_opc_info_t moxie_form3_opc_info[16];
-
-/* The moxie processor's 16-bit instructions come in two forms:
-
- FORM 1 instructions start with a 0 bit...
-
- 0oooooooaaaabbbb
- 0 F
-
- ooooooo - form 1 opcode number
- aaaa - operand A
- bbbb - operand B
-
- FORM 2 instructions start with bits "10"...
-
- 10ooaaaavvvvvvvv
- 0 F
-
- oo - form 2 opcode number
- aaaa - operand A
- vvvvvvvv - 8-bit immediate value
-
- FORM 3 instructions start with a bits "11"...
-
- 11oooovvvvvvvvvv
- 0 F
-
- oooo - form 3 opcode number
- vvvvvvvvvv - 10-bit immediate value. */
-
-const moxie_opc_info_t moxie_form1_opc_info[64] =
- {
- { 0x00, MOXIE_F1_NARG, "nop" },
- { 0x01, MOXIE_F1_A4, "ldi.l" },
- { 0x02, MOXIE_F1_AB, "mov" },
- { 0x03, MOXIE_F1_M, "jsra" },
- { 0x04, MOXIE_F1_NARG, "ret" },
- { 0x05, MOXIE_F1_AB, "add.l" },
- { 0x06, MOXIE_F1_AB, "push" },
- { 0x07, MOXIE_F1_AB, "pop" },
- { 0x08, MOXIE_F1_A4, "lda.l" },
- { 0x09, MOXIE_F1_4A, "sta.l" },
- { 0x0a, MOXIE_F1_ABi, "ld.l" },
- { 0x0b, MOXIE_F1_AiB, "st.l" },
- { 0x0c, MOXIE_F1_ABi4, "ldo.l" },
- { 0x0d, MOXIE_F1_AiB4, "sto.l" },
- { 0x0e, MOXIE_F1_AB, "cmp" },
- { 0x0f, MOXIE_F1_NARG, "bad" },
- { 0x10, MOXIE_F1_NARG, "bad" },
- { 0x11, MOXIE_F1_NARG, "bad" },
- { 0x12, MOXIE_F1_NARG, "bad" },
- { 0x13, MOXIE_F1_NARG, "bad" },
- { 0x14, MOXIE_F1_NARG, "bad" },
- { 0x15, MOXIE_F1_NARG, "bad" },
- { 0x16, MOXIE_F1_NARG, "bad" },
- { 0x17, MOXIE_F1_NARG, "bad" },
- { 0x18, MOXIE_F1_NARG, "bad" },
- { 0x19, MOXIE_F1_A, "jsr" },
- { 0x1a, MOXIE_F1_M, "jmpa" },
- { 0x1b, MOXIE_F1_A4, "ldi.b" },
- { 0x1c, MOXIE_F1_ABi, "ld.b" },
- { 0x1d, MOXIE_F1_A4, "lda.b" },
- { 0x1e, MOXIE_F1_AiB, "st.b" },
- { 0x1f, MOXIE_F1_4A, "sta.b" },
- { 0x20, MOXIE_F1_A4, "ldi.s" },
- { 0x21, MOXIE_F1_ABi, "ld.s" },
- { 0x22, MOXIE_F1_A4, "lda.s" },
- { 0x23, MOXIE_F1_AiB, "st.s" },
- { 0x24, MOXIE_F1_4A, "sta.s" },
- { 0x25, MOXIE_F1_A, "jmp" },
- { 0x26, MOXIE_F1_AB, "and" },
- { 0x27, MOXIE_F1_AB, "lshr" },
- { 0x28, MOXIE_F1_AB, "ashl" },
- { 0x29, MOXIE_F1_AB, "sub.l" },
- { 0x2a, MOXIE_F1_AB, "neg" },
- { 0x2b, MOXIE_F1_AB, "or" },
- { 0x2c, MOXIE_F1_AB, "not" },
- { 0x2d, MOXIE_F1_AB, "ashr" },
- { 0x2e, MOXIE_F1_AB, "xor" },
- { 0x2f, MOXIE_F1_AB, "mul.l" },
- { 0x30, MOXIE_F1_4, "swi" },
- { 0x31, MOXIE_F1_AB, "div.l" },
- { 0x32, MOXIE_F1_AB, "udiv.l" },
- { 0x33, MOXIE_F1_AB, "mod.l" },
- { 0x34, MOXIE_F1_AB, "umod.l" },
- { 0x35, MOXIE_F1_NARG, "brk" },
- { 0x36, MOXIE_F1_ABi4, "ldo.b" },
- { 0x37, MOXIE_F1_AiB4, "sto.b" },
- { 0x38, MOXIE_F1_ABi4, "ldo.s" },
- { 0x39, MOXIE_F1_AiB4, "sto.s" },
- { 0x3a, MOXIE_F1_NARG, "bad" },
- { 0x3b, MOXIE_F1_NARG, "bad" },
- { 0x3c, MOXIE_F1_NARG, "bad" },
- { 0x3d, MOXIE_F1_NARG, "bad" },
- { 0x3e, MOXIE_F1_NARG, "bad" },
- { 0x3f, MOXIE_F1_NARG, "bad" }
- };
-
-const moxie_opc_info_t moxie_form2_opc_info[4] =
- {
- { 0x00, MOXIE_F2_A8V, "inc" },
- { 0x01, MOXIE_F2_A8V, "dec" },
- { 0x02, MOXIE_F2_A8V, "gsr" },
- { 0x03, MOXIE_F2_A8V, "ssr" }
- };
-
-const moxie_opc_info_t moxie_form3_opc_info[16] =
- {
- { 0x00, MOXIE_F3_PCREL,"beq" },
- { 0x01, MOXIE_F3_PCREL,"bne" },
- { 0x02, MOXIE_F3_PCREL,"blt" },
- { 0x03, MOXIE_F3_PCREL,"bgt" },
- { 0x04, MOXIE_F3_PCREL,"bltu" },
- { 0x05, MOXIE_F3_PCREL,"bgtu" },
- { 0x06, MOXIE_F3_PCREL,"bge" },
- { 0x07, MOXIE_F3_PCREL,"ble" },
- { 0x08, MOXIE_F3_PCREL,"bgeu" },
- { 0x09, MOXIE_F3_PCREL,"bleu" },
- { 0x0a, MOXIE_F3_NARG, "bad" },
- { 0x0b, MOXIE_F3_NARG, "bad" },
- { 0x0c, MOXIE_F3_NARG, "bad" },
- { 0x0d, MOXIE_F3_NARG, "bad" },
- { 0x0e, MOXIE_F3_NARG, "bad" },
- { 0x0f, MOXIE_F3_NARG, "bad" }
- };
-
-/* Macros to extract operands from the instruction word. */
-#define OP_A(i) ((i >> 4) & 0xf)
-#define OP_B(i) (i & 0xf)
-#define INST2OFFSET(o) ((((signed short)((o & ((1<<10)-1))<<6))>>6)<<1)
-
-static const char * reg_names[16] =
- { "$fp", "$sp", "$r0", "$r1", "$r2", "$r3", "$r4", "$r5",
- "$r6", "$r7", "$r8", "$r9", "$r10", "$r11", "$r12", "$r13" };
-
-int
-print_insn_moxie(bfd_vma addr, struct disassemble_info * info)
-{
- int length = 2;
- int status;
- stream = info->stream;
- const moxie_opc_info_t * opcode;
- bfd_byte buffer[4];
- unsigned short iword;
- fprintf_function fpr = info->fprintf_func;
-
- if ((status = info->read_memory_func(addr, buffer, 2, info)))
- goto fail;
- iword = (bfd_getb16(buffer) >> 16);
-
- /* Form 1 instructions have the high bit set to 0. */
- if ((iword & (1<<15)) == 0) {
- /* Extract the Form 1 opcode. */
- opcode = &moxie_form1_opc_info[iword >> 8];
- switch (opcode->itype) {
- case MOXIE_F1_NARG:
- fpr(stream, "%s", opcode->name);
- break;
- case MOXIE_F1_A:
- fpr(stream, "%s\t%s", opcode->name,
- reg_names[OP_A(iword)]);
- break;
- case MOXIE_F1_AB:
- fpr(stream, "%s\t%s, %s", opcode->name,
- reg_names[OP_A(iword)],
- reg_names[OP_B(iword)]);
- break;
- case MOXIE_F1_A4:
- {
- unsigned imm;
- if ((status = info->read_memory_func(addr + 2, buffer, 4, info)))
- goto fail;
- imm = bfd_getb32(buffer);
- fpr(stream, "%s\t%s, 0x%x", opcode->name,
- reg_names[OP_A(iword)], imm);
- length = 6;
- }
- break;
- case MOXIE_F1_4:
- {
- unsigned imm;
- if ((status = info->read_memory_func(addr + 2, buffer, 4, info)))
- goto fail;
- imm = bfd_getb32(buffer);
- fpr(stream, "%s\t0x%x", opcode->name, imm);
- length = 6;
- }
- break;
- case MOXIE_F1_M:
- {
- unsigned imm;
- if ((status = info->read_memory_func(addr + 2, buffer, 4, info)))
- goto fail;
- imm = bfd_getb32(buffer);
- fpr(stream, "%s\t", opcode->name);
- info->print_address_func((bfd_vma) imm, info);
- length = 6;
- }
- break;
- case MOXIE_F1_AiB:
- fpr (stream, "%s\t(%s), %s", opcode->name,
- reg_names[OP_A(iword)], reg_names[OP_B(iword)]);
- break;
- case MOXIE_F1_ABi:
- fpr(stream, "%s\t%s, (%s)", opcode->name,
- reg_names[OP_A(iword)], reg_names[OP_B(iword)]);
- break;
- case MOXIE_F1_4A:
- {
- unsigned imm;
- if ((status = info->read_memory_func(addr + 2, buffer, 4, info)))
- goto fail;
- imm = bfd_getb32(buffer);
- fpr(stream, "%s\t0x%x, %s",
- opcode->name, imm, reg_names[OP_A(iword)]);
- length = 6;
- }
- break;
- case MOXIE_F1_AiB4:
- {
- unsigned imm;
- if ((status = info->read_memory_func(addr+2, buffer, 4, info)))
- goto fail;
- imm = bfd_getb32(buffer);
- fpr(stream, "%s\t0x%x(%s), %s", opcode->name,
- imm,
- reg_names[OP_A(iword)],
- reg_names[OP_B(iword)]);
- length = 6;
- }
- break;
- case MOXIE_F1_ABi4:
- {
- unsigned imm;
- if ((status = info->read_memory_func(addr+2, buffer, 4, info)))
- goto fail;
- imm = bfd_getb32(buffer);
- fpr(stream, "%s\t%s, 0x%x(%s)",
- opcode->name,
- reg_names[OP_A(iword)],
- imm,
- reg_names[OP_B(iword)]);
- length = 6;
- }
- break;
- default:
- abort();
- }
- }
- else if ((iword & (1<<14)) == 0) {
- /* Extract the Form 2 opcode. */
- opcode = &moxie_form2_opc_info[(iword >> 12) & 3];
- switch (opcode->itype) {
- case MOXIE_F2_A8V:
- fpr(stream, "%s\t%s, 0x%x",
- opcode->name,
- reg_names[(iword >> 8) & 0xf],
- iword & ((1 << 8) - 1));
- break;
- case MOXIE_F2_NARG:
- fpr(stream, "%s", opcode->name);
- break;
- default:
- abort();
- }
- } else {
- /* Extract the Form 3 opcode. */
- opcode = &moxie_form3_opc_info[(iword >> 10) & 15];
- switch (opcode->itype) {
- case MOXIE_F3_PCREL:
- fpr(stream, "%s\t", opcode->name);
- info->print_address_func((bfd_vma) (addr + INST2OFFSET(iword) + 2),
- info);
- break;
- default:
- abort();
- }
- }
-
- return length;
-
- fail:
- info->memory_error_func(status, addr, info);
- return -1;
-}