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Virtualmips: implement CLO instruction.

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This commit is contained in:
Serge Vakulenko
2015-10-29 18:17:02 -07:00
parent 1a5f550fe1
commit 37646559fd
1 changed files with 19 additions and 2 deletions
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21
tools/virtualmips/mips_codetable.c
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@@ -543,6 +543,23 @@ static int clz_op (cpu_mips_t * cpu, mips_insn_t insn)
return (0);
}
static int clo_op (cpu_mips_t * cpu, mips_insn_t insn)
{
int rs = bits (insn, 21, 25);
int rd = bits (insn, 11, 15);
int i;
m_uint32_t val;
val = 32;
for (i = 31; i >= 0; i--) {
if (! (cpu->gpr[rs] & (1 << i))) {
val = 31 - i;
break;
}
}
cpu->reg_set (cpu, rd, val);
return (0);
}
static int cop0_op (cpu_mips_t * cpu, mips_insn_t insn)
{
uint16_t special_func = bits (insn, 21, 25);
@@ -2126,8 +2143,8 @@ static const struct mips_op_desc mips_spec2_opcodes[] = {
{"?spec2", undef_spec2,0x1d},
{"?spec2", undef_spec2,0x1e},
{"?spec2", undef_spec2,0x1f},
{"clz", clz_op, 0x20},
{"?spec2", undef_spec2,0x21},
{"clz", clz_op, 0x20},
{"clo", clo_op, 0x21},
{"?spec2", undef_spec2,0x22},
{"?spec2", undef_spec2,0x23},
{"?spec2", undef_spec2,0x24},