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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

Backports commit 860b9ac779615fe9315cd58165652052ac165a92 from qemu
This commit is contained in:
Laurent Vivier 2018-03-03 18:49:41 -05:00 committed by Lioncash
parent ca25248ecd
commit d92621522a
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GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 32 additions and 25 deletions
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57
qemu/target/m68k/translate.c
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@ -4256,6 +4256,36 @@ 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)
{
TCGContext *tcg_ctx = s->uc->tcg_ctx;
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(tcg_ctx, 0);
DEST_EA(env, insn, OS_LONG, val, NULL);
tcg_temp_free(tcg_ctx, 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)
@ -4334,32 +4364,9 @@ DISAS_INSN(fpu)
tcg_temp_free_i32(tcg_ctx, 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(tcg_ctx, 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:
{