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/* Disassemble ft32 instructions.
Copyright (C) 2013-2023 Free Software Foundation, Inc.
Contributed by FTDI (support@ftdichip.com)
This file is part of the GNU opcodes library.
This library 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 3, or (at your option)
any later version.
It 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, write to the Free Software
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
#include "sysdep.h"
#include <stdio.h>
#define STATIC_TABLE
#define DEFINE_TABLE
#include "opcode/ft32.h"
#include "disassemble.h"
extern const ft32_opc_info_t ft32_opc_info[];
static fprintf_ftype fpr;
static void *stream;
static int
sign_extend (int bit, int value)
{
int onebit = (1 << bit);
return (value & (onebit - 1)) - (value & onebit);
}
static void
ft32_opcode1 (unsigned int iword,
struct disassemble_info *info)
{
const ft32_opc_info_t *oo;
for (oo = ft32_opc_info; oo->name; oo++)
if ((iword & oo->mask) == oo->bits)
break;
if (oo->name)
{
int f = oo->fields;
int imm;
fpr (stream, "%s", oo->name);
if (oo->dw)
fpr (stream, ".%c ", "bsl"[(iword >> FT32_FLD_DW_BIT) & 3]);
else
fpr (stream, " ");
while (f)
{
int lobit = f & -f;
if (f & lobit)
{
switch (lobit)
{
case FT32_FLD_CBCRCV:
/* imm is {CB, CV} */
imm = ((iword >> FT32_FLD_CB_BIT) & ((1 << FT32_FLD_CB_SIZ) - 1)) << 4;
imm |= ((iword >> FT32_FLD_CV_BIT) & ((1 << FT32_FLD_CV_SIZ) - 1));
switch (imm)
{
case 0x00: fpr (stream, "nz"); break;
case 0x01: fpr (stream, "z"); break;
case 0x10: fpr (stream, "ae"); break;
case 0x11: fpr (stream, "b"); break;
case 0x20: fpr (stream, "no"); break;
case 0x21: fpr (stream, "o"); break;
case 0x30: fpr (stream, "ns"); break;
case 0x31: fpr (stream, "s"); break;
case 0x40: fpr (stream, "lt"); break;
case 0x41: fpr (stream, "gte"); break;
case 0x50: fpr (stream, "lte"); break;
case 0x51: fpr (stream, "gt"); break;
case 0x60: fpr (stream, "be"); break;
case 0x61: fpr (stream, "a"); break;
default:
fpr (stream, "%d,$r30,%d", (imm >> 4), (imm & 1));
break;
}
break;
case FT32_FLD_CB:
imm = (iword >> FT32_FLD_CB_BIT) & ((1 << FT32_FLD_CB_SIZ) - 1);
fpr (stream, "%d", imm);
break;
case FT32_FLD_R_D:
fpr (stream, "$r%d", (iword >> FT32_FLD_R_D_BIT) & 0x1f);
break;
case FT32_FLD_CR:
imm = (iword >> FT32_FLD_CR_BIT) & ((1 << FT32_FLD_CR_SIZ) - 1);
fpr (stream, "$r%d", 28 + imm);
break;
case FT32_FLD_CV:
imm = (iword >> FT32_FLD_CV_BIT) & ((1 << FT32_FLD_CV_SIZ) - 1);
fpr (stream, "%d", imm);
break;
case FT32_FLD_R_1:
fpr (stream, "$r%d", (iword >> FT32_FLD_R_1_BIT) & 0x1f);
break;
case FT32_FLD_RIMM:
imm = (iword >> FT32_FLD_RIMM_BIT) & ((1 << FT32_FLD_RIMM_SIZ) - 1);
if (imm & 0x400)
fpr (stream, "%d", sign_extend (9, imm));
else
fpr (stream, "$r%d", imm & 0x1f);
break;
case FT32_FLD_R_2:
fpr (stream, "$r%d", (iword >> FT32_FLD_R_2_BIT) & 0x1f);
break;
case FT32_FLD_K20:
imm = iword & ((1 << FT32_FLD_K20_SIZ) - 1);
fpr (stream, "%d", sign_extend (19, imm));
break;
case FT32_FLD_PA:
imm = (iword & ((1 << FT32_FLD_PA_SIZ) - 1)) << 2;
info->print_address_func ((bfd_vma) imm, info);
break;
case FT32_FLD_AA:
imm = iword & ((1 << FT32_FLD_AA_SIZ) - 1);
info->print_address_func ((1 << 23) | (bfd_vma) imm, info);
break;
case FT32_FLD_K16:
imm = iword & ((1 << FT32_FLD_K16_SIZ) - 1);
fpr (stream, "%d", imm);
break;
case FT32_FLD_K15:
imm = iword & ((1 << FT32_FLD_K15_SIZ) - 1);
fpr (stream, "%d", sign_extend (14, imm));
break;
case FT32_FLD_R_D_POST:
fpr (stream, "$r%d", (iword >> FT32_FLD_R_D_BIT) & 0x1f);
break;
case FT32_FLD_R_1_POST:
fpr (stream, "$r%d", (iword >> FT32_FLD_R_1_BIT) & 0x1f);
break;
default:
break;
}
f &= ~lobit;
if (f)
fpr (stream, ",");
}
}
}
else
fpr (stream, "!");
}
static void
ft32_opcode (bfd_vma addr ATTRIBUTE_UNUSED,
unsigned int iword,
struct disassemble_info *info)
{
unsigned int sc[2];
if (ft32_decode_shortcode ((unsigned int) addr, iword, sc))
{
ft32_opcode1 (sc[0], info);
fpr (stream, " ; ");
ft32_opcode1 (sc[1], info);
}
else
ft32_opcode1 (iword, info);
}
int
print_insn_ft32 (bfd_vma addr, struct disassemble_info *info)
{
int status;
stream = info->stream;
bfd_byte buffer[4];
unsigned int iword;
fpr = info->fprintf_func;
if ((status = info->read_memory_func (addr, buffer, 4, info)))
goto fail;
iword = bfd_getl32 (buffer);
fpr (stream, "%08x ", iword);
ft32_opcode (addr, iword, info);
return 4;
fail:
info->memory_error_func (status, addr, info);
return -1;
}
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