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target/ppc: cntlzdm/cnttzdm implementation without brcond

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Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Matheus Ferst <matheus.ferst@eldorado.org.br>
Message-Id: <20211104123719.323713-26-matheus.ferst@eldorado.org.br>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Matheus Ferst 2021-11-04 09:37:19 -03:00 committed by David Gibson
parent 6e26b85de5
commit ab1e25ad2f
1 changed files with 16 additions and 15 deletions
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31
target/ppc/translate/fixedpoint-impl.c.inc
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@ -416,32 +416,33 @@ static bool trans_CFUGED(DisasContext *ctx, arg_X *a)
static void do_cntzdm(TCGv_i64 dst, TCGv_i64 src, TCGv_i64 mask, int64_t trail)
{
TCGv_i64 tmp;
TCGLabel *l1;
TCGv_i64 t0, t1;
tmp = tcg_temp_local_new_i64();
l1 = gen_new_label();
t0 = tcg_temp_new_i64();
t1 = tcg_temp_new_i64();
tcg_gen_and_i64(tmp, src, mask);
tcg_gen_and_i64(t0, src, mask);
if (trail) {
tcg_gen_ctzi_i64(tmp, tmp, 64);
tcg_gen_ctzi_i64(t0, t0, -1);
} else {
tcg_gen_clzi_i64(tmp, tmp, 64);
tcg_gen_clzi_i64(t0, t0, -1);
}
tcg_gen_brcondi_i64(TCG_COND_EQ, tmp, 0, l1);
tcg_gen_subfi_i64(tmp, 64, tmp);
tcg_gen_setcondi_i64(TCG_COND_NE, t1, t0, -1);
tcg_gen_andi_i64(t0, t0, 63);
tcg_gen_xori_i64(t0, t0, 63);
if (trail) {
tcg_gen_shl_i64(tmp, mask, tmp);
tcg_gen_shl_i64(t0, mask, t0);
tcg_gen_shl_i64(t0, t0, t1);
} else {
tcg_gen_shr_i64(tmp, mask, tmp);
tcg_gen_shr_i64(t0, mask, t0);
tcg_gen_shr_i64(t0, t0, t1);
}
tcg_gen_ctpop_i64(tmp, tmp);
gen_set_label(l1);
tcg_gen_ctpop_i64(dst, t0);
tcg_gen_mov_i64(dst, tmp);
tcg_temp_free_i64(t0);
tcg_temp_free_i64(t1);
}
static bool trans_CNTLZDM(DisasContext *ctx, arg_X *a)