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target-ppc: Implement mulldo with TCG

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Optimize mulldo by using the muls2_i64 operation rather than a helper.  Eliminate
the obsolete helper code.

Signed-off-by: Tom Musta <tommusta@gmail.com>
Suggested-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Tom Musta 2014-08-25 14:25:44 -05:00 • committed by Alexander Graf
parent 269778769d
commit 22ffad31d4
3 changed files with 14 additions and 30 deletions
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16
target-ppc/translate.c
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@ -1215,8 +1215,20 @@ static void gen_mulld(DisasContext *ctx)
/* mulldo mulldo. */
static void gen_mulldo(DisasContext *ctx)
{
gen_helper_mulldo(cpu_gpr[rD(ctx->opcode)], cpu_env,
cpu_gpr[rA(ctx->opcode)], cpu_gpr[rB(ctx->opcode)]);
TCGv_i64 t0 = tcg_temp_new_i64();
TCGv_i64 t1 = tcg_temp_new_i64();
tcg_gen_muls2_i64(t0, t1, cpu_gpr[rA(ctx->opcode)],
cpu_gpr[rB(ctx->opcode)]);
tcg_gen_mov_i64(cpu_gpr[rD(ctx->opcode)], t0);
tcg_gen_sari_i64(t0, t0, 63);
tcg_gen_setcond_i64(TCG_COND_NE, cpu_ov, t0, t1);
tcg_gen_or_tl(cpu_so, cpu_so, cpu_ov);
tcg_temp_free_i64(t0);
tcg_temp_free_i64(t1);
if (unlikely(Rc(ctx->opcode) != 0)) {
gen_set_Rc0(ctx, cpu_gpr[rD(ctx->opcode)]);
}