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target/ppc: Avoid tcg_const_i64 in do_vcntmb

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Compute both partial results separately and accumulate
at the end, instead of accumulating in the middle.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2023-02-25 18:17:50 -10:00
parent 999b7c2659
commit ffc0ce24fd
1 changed files with 11 additions and 10 deletions
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21
target/ppc/translate/vmx-impl.c.inc
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@ -2236,24 +2236,25 @@ static bool trans_MTVSRBMI(DisasContext *ctx, arg_DX_b *a)
static bool do_vcntmb(DisasContext *ctx, arg_VX_mp *a, int vece)
{
TCGv_i64 rt, vrb, mask;
rt = tcg_const_i64(0);
vrb = tcg_temp_new_i64();
TCGv_i64 r[2], mask;
r[0] = tcg_temp_new_i64();
r[1] = tcg_temp_new_i64();
mask = tcg_constant_i64(dup_const(vece, 1ULL << ((8 << vece) - 1)));
for (int i = 0; i < 2; i++) {
get_avr64(vrb, a->vrb, i);
get_avr64(r[i], a->vrb, i);
if (a->mp) {
tcg_gen_and_i64(vrb, mask, vrb);
tcg_gen_and_i64(r[i], mask, r[i]);
} else {
tcg_gen_andc_i64(vrb, mask, vrb);
tcg_gen_andc_i64(r[i], mask, r[i]);
}
tcg_gen_ctpop_i64(vrb, vrb);
tcg_gen_add_i64(rt, rt, vrb);
tcg_gen_ctpop_i64(r[i], r[i]);
}
tcg_gen_shli_i64(rt, rt, TARGET_LONG_BITS - 8 + vece);
tcg_gen_trunc_i64_tl(cpu_gpr[a->rt], rt);
tcg_gen_add_i64(r[0], r[0], r[1]);
tcg_gen_shli_i64(r[0], r[0], TARGET_LONG_BITS - 8 + vece);
tcg_gen_trunc_i64_tl(cpu_gpr[a->rt], r[0]);
return true;
}