target-xtensa: Use clrsb helper
Signed-off-by: Richard Henderson <rth@twiddle.net>
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@ -1372,16 +1372,7 @@ static void disas_xtensa_insn(CPUXtensaState *env, DisasContext *dc)
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case 14: /*NSAu*/
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case 14: /*NSAu*/
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HAS_OPTION(XTENSA_OPTION_MISC_OP_NSA);
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HAS_OPTION(XTENSA_OPTION_MISC_OP_NSA);
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if (gen_window_check2(dc, RRR_S, RRR_T)) {
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if (gen_window_check2(dc, RRR_S, RRR_T)) {
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TCGv_i32 t0 = tcg_temp_new_i32();
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tcg_gen_clrsb_i32(cpu_R[RRR_T], cpu_R[RRR_S]);
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/* if (v & 0x80000000) v = ~v; */
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tcg_gen_sari_i32(t0, cpu_R[RRR_S], 31);
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tcg_gen_xor_i32(t0, t0, cpu_R[RRR_S]);
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/* r = (v ? clz(v) : 32) - 1; */
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tcg_gen_clzi_i32(t0, t0, 32);
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tcg_gen_subi_i32(cpu_R[RRR_T], t0, 1);
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tcg_temp_free_i32(t0);
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}
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}
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break;
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break;
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