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target/m68k: Implement TPF in terms of TRAPcc 

TPF stands for "trap false", and is a long-form nop for ColdFire.
Re-use the immediate consumption code from trapcc; the insn will
already expand to a nop because of the TCG_COND_NEVER test
within do_trapcc.

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220602013401.303699-12-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Richard Henderson 2022-06-01 18:33:55 -07:00 committed by Laurent Vivier
parent aeeb90afce
commit 815c6dea46
1 changed files with 2 additions and 17 deletions
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19
target/m68k/translate.c
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@ -3075,22 +3075,6 @@ DISAS_INSN(addsubq)
tcg_temp_free(dest);
}
DISAS_INSN(tpf)
{
switch (insn & 7) {
case 2: /* One extension word. */
s->pc += 2;
break;
case 3: /* Two extension words. */
s->pc += 4;
break;
case 4: /* No extension words. */
break;
default:
disas_undef(env, s, insn);
}
}
DISAS_INSN(branch)
{
int32_t offset;
@ -6100,7 +6084,8 @@ void register_m68k_insns (CPUM68KState *env)
INSN(dbcc, 50c8, f0f8, M68000);
INSN(trapcc, 50fa, f0fe, TRAPCC); /* opmode 010, 011 */
INSN(trapcc, 50fc, f0ff, TRAPCC); /* opmode 100 */
INSN(tpf, 51f8, fff8, CF_ISA_A);
INSN(trapcc, 51fa, fffe, CF_ISA_A); /* TPF (trapf) opmode 010, 011 */
INSN(trapcc, 51fc, ffff, CF_ISA_A); /* TPF (trapf) opmode 100 */
/* Branch instructions. */
BASE(branch, 6000, f000);