system/qemu
system/qemu
1
0
Fork 0
mirror of https://gitlab.com/qemu-project/qemu synced 2024-07-24 03:44:38 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

disas/nanomips: Merge insn{1,2,3} into words[3]

Browse source 
Since Disassemble wants the data in this format, collect
it that way.  This allows using a loop to print the bytes.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20221106212852.152384-3-richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2022-11-07 08:28:48 +11:00 committed by Philippe Mathieu-Daudé
parent 24449fc0f5
commit ad120616ed
1 changed files with 21 additions and 23 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

44
disas/nanomips.c
View file

@ -21907,26 +21907,22 @@ static const Pool MAJOR[2] = {
0x0 }, /* P16 */
};
static bool nanomips_dis(char **buf, Dis_info *info,
unsigned short one,
unsigned short two,
unsigned short three)
static bool nanomips_dis(const uint16_t *data, char **buf, Dis_info *info)
{
uint16 bits[3] = {one, two, three};
TABLE_ENTRY_TYPE type;
/* Handle runtime errors. */
if (unlikely(sigsetjmp(info->buf, 0) != 0)) {
return false;
}
return Disassemble(bits, buf, &type, MAJOR, ARRAY_SIZE(MAJOR), info) >= 0;
return Disassemble(data, buf, &type, MAJOR, ARRAY_SIZE(MAJOR), info) >= 0;
}
int print_insn_nanomips(bfd_vma memaddr, struct disassemble_info *info)
{
int status, length;
bfd_byte buffer[2];
uint16_t insn1 = 0, insn2 = 0, insn3 = 0;
uint16_t words[3] = { };
g_autofree char *buf = NULL;
info->bytes_per_chunk = 2;
@ -21950,15 +21946,14 @@ int print_insn_nanomips(bfd_vma memaddr, struct disassemble_info *info)
}
if (info->endian == BFD_ENDIAN_BIG) {
insn1 = bfd_getb16(buffer);
words[0] = bfd_getb16(buffer);
} else {
insn1 = bfd_getl16(buffer);
words[0] = bfd_getl16(buffer);
}
length = 2;
(*info->fprintf_func)(info->stream, "%04x ", insn1);
/* Handle 32-bit opcodes. */
if ((insn1 & 0x1000) == 0) {
if ((words[0] & 0x1000) == 0) {
status = (*info->read_memory_func)(memaddr + 2, buffer, 2, info);
if (status != 0) {
(*info->memory_error_func)(status, memaddr + 2, info);
@ -21966,17 +21961,15 @@ int print_insn_nanomips(bfd_vma memaddr, struct disassemble_info *info)
}
if (info->endian == BFD_ENDIAN_BIG) {
insn2 = bfd_getb16(buffer);
words[1] = bfd_getb16(buffer);
} else {
insn2 = bfd_getl16(buffer);
words[1] = bfd_getl16(buffer);
}
length = 4;
(*info->fprintf_func)(info->stream, "%04x ", insn2);
} else {
(*info->fprintf_func)(info->stream, " ");
}
/* Handle 48-bit opcodes. */
if ((insn1 >> 10) == 0x18) {
if ((words[0] >> 10) == 0x18) {
status = (*info->read_memory_func)(memaddr + 4, buffer, 2, info);
if (status != 0) {
(*info->memory_error_func)(status, memaddr + 4, info);
@ -21984,17 +21977,22 @@ int print_insn_nanomips(bfd_vma memaddr, struct disassemble_info *info)
}
if (info->endian == BFD_ENDIAN_BIG) {
insn3 = bfd_getb16(buffer);
words[2] = bfd_getb16(buffer);
} else {
insn3 = bfd_getl16(buffer);
words[2] = bfd_getl16(buffer);
}
length = 6;
(*info->fprintf_func)(info->stream, "%04x ", insn3);
} else {
(*info->fprintf_func)(info->stream, " ");
}
if (nanomips_dis(&buf, &disassm_info, insn1, insn2, insn3)) {
for (int i = 0; i < ARRAY_SIZE(words); i++) {
if (i * 2 < length) {
(*info->fprintf_func)(info->stream, "%04x ", words[i]);
} else {
(*info->fprintf_func)(info->stream, " ");
}
}
if (nanomips_dis(words, &buf, &disassm_info)) {
(*info->fprintf_func) (info->stream, "%s", buf);
}