/* Disassemble ft32 instructions.
- Copyright (C) 2013-2017 Free Software Foundation, Inc.
+ Copyright (C) 2013-2019 Free Software Foundation, Inc.
Contributed by FTDI (support@ftdichip.com)
This file is part of the GNU opcodes library.
static fprintf_ftype fpr;
static void *stream;
-int
-print_insn_ft32 (bfd_vma addr, struct disassemble_info *info)
+static int
+sign_extend(int bit, int value)
{
- int status;
- stream = info->stream;
- bfd_byte buffer[4];
- unsigned int iword;
- const ft32_opc_info_t *oo;
-
- fpr = info->fprintf_func;
-
- if ((status = info->read_memory_func (addr, buffer, 4, info)))
- goto fail;
+ int onebit = (1 << bit);
+ return (value & (onebit - 1)) - (value & onebit);
+}
- iword = bfd_getl32 (buffer);
+static void
+ft32_opcode(bfd_vma addr ATTRIBUTE_UNUSED,
+ 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;
+ unsigned int sc[2];
+ if (ft32_decode_shortcode((unsigned int)addr, iword, sc))
+ {
+ ft32_opcode(addr, sc[0], info);
+ fpr (stream, " ; ");
+ ft32_opcode(addr, sc[1], info);
+ }
+
if (oo->name)
{
int f = oo->fields;
int imm;
- fpr (stream, "%08x %s", iword, oo->name);
+ fpr (stream, "%s", oo->name);
if (oo->dw)
{
fpr (stream, ".%c ", "bsl"[(iword >> FT32_FLD_DW_BIT) & 3]);
case FT32_FLD_RIMM:
imm = (iword >> FT32_FLD_RIMM_BIT) & ((1 << FT32_FLD_RIMM_SIZ) - 1);
if (imm & 0x400)
- info->print_address_func ((bfd_vma) imm & 0x3ff, info);
+ fpr(stream, "%d", sign_extend(9, imm));
else
fpr(stream, "$r%d", imm & 0x1f);
break;
break;
case FT32_FLD_K20:
imm = iword & ((1 << FT32_FLD_K20_SIZ) - 1);
- info->print_address_func ((bfd_vma) imm, info);
+ fpr(stream, "%d", sign_extend(19, imm));
break;
case FT32_FLD_PA:
imm = (iword & ((1 << FT32_FLD_PA_SIZ) - 1)) << 2;
break;
case FT32_FLD_AA:
imm = iword & ((1 << FT32_FLD_AA_SIZ) - 1);
- info->print_address_func ((bfd_vma) imm, info);
- break;
+ info->print_address_func ((1 << 23) | (bfd_vma) imm, info);
break;
case FT32_FLD_K16:
imm = iword & ((1 << FT32_FLD_K16_SIZ) - 1);
- info->print_address_func ((bfd_vma) imm, info);
- break;
- case FT32_FLD_K8:
- imm = iword & ((1 << FT32_FLD_K8_SIZ) - 1);
- info->print_address_func ((bfd_vma) imm, info);
+ fpr(stream, "%d", imm);
break;
+ case FT32_FLD_K15:
+ imm = iword & ((1 << FT32_FLD_K15_SIZ) - 1);
+ fpr(stream, "%d", sign_extend(14, imm));
break;
case FT32_FLD_R_D_POST:
fpr(stream, "$r%d", (iword >> FT32_FLD_R_D_BIT) & 0x1f);
}
else
{
- fpr (stream, "%08x!", iword);
+ fpr (stream, "!");
}
+}
+
+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;