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target-m68k: move fmove CR to a function

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Move code of fmove to/from control register to a function

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20170620205121.26515-2-laurent@vivier.eu>
This commit is contained in:
Laurent Vivier 2017-06-20 22:51:16 +02:00
parent 8dfaf23ae1
commit 860b9ac779
1 changed files with 31 additions and 25 deletions
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56
target/m68k/translate.c
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@ -4099,6 +4099,35 @@ DISAS_INSN(trap)
gen_exception(s, s->pc - 2, EXCP_TRAP0 + (insn & 0xf));
}
static void gen_op_fmove_fcr(CPUM68KState *env, DisasContext *s,
uint32_t insn, uint32_t ext)
{
int mask = (ext >> 10) & 7;
int is_write = (ext >> 13) & 1;
TCGv val;
switch (mask) {
case 1: /* FPIAR */
case 2: /* FPSR */
default:
qemu_log_mask(LOG_UNIMP, "Unimplemented: fmove to/from control %d",
mask);
goto undef;
case 4: /* FPCR */
if (is_write) {
val = tcg_const_i32(0);
DEST_EA(env, insn, OS_LONG, val, NULL);
tcg_temp_free(val);
}
/* Not implemented. Ignore register update */
break;
}
return;
undef:
s->pc -= 2;
disas_undef_fpu(env, s, insn);
}
/* ??? FP exceptions are not implemented. Most exceptions are deferred until
immediately before the next FP instruction is executed. */
DISAS_INSN(fpu)
@ -4177,32 +4206,9 @@ DISAS_INSN(fpu)
tcg_temp_free_i32(tmp32);
return;
case 4: /* fmove to control register. */
switch ((ext >> 10) & 7) {
case 4: /* FPCR */
/* Not implemented. Ignore writes. */
break;
case 1: /* FPIAR */
case 2: /* FPSR */
default:
cpu_abort(NULL, "Unimplemented: fmove to control %d",
(ext >> 10) & 7);
}
break;
case 5: /* fmove from control register. */
switch ((ext >> 10) & 7) {
case 4: /* FPCR */
/* Not implemented. Always return zero. */
tmp32 = tcg_const_i32(0);
break;
case 1: /* FPIAR */
case 2: /* FPSR */
default:
cpu_abort(NULL, "Unimplemented: fmove from control %d",
(ext >> 10) & 7);
goto undef;
}
DEST_EA(env, insn, OS_LONG, tmp32, NULL);
break;
gen_op_fmove_fcr(env, s, insn, ext);
return;
case 6: /* fmovem */
case 7:
{