target/ppc: update ca32 in arithmetic substract
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com> Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
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@ -827,7 +827,11 @@ static inline void gen_op_arith_compute_ca32(DisasContext *ctx,
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}
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t0 = tcg_temp_new();
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tcg_gen_xor_tl(t0, arg0, arg1);
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if (sub) {
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tcg_gen_eqv_tl(t0, arg0, arg1);
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} else {
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tcg_gen_xor_tl(t0, arg0, arg1);
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}
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tcg_gen_xor_tl(t0, t0, res);
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tcg_gen_extract_tl(cpu_ca32, t0, 32, 1);
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tcg_temp_free(t0);
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@ -1378,17 +1382,22 @@ static inline void gen_op_arith_subf(DisasContext *ctx, TCGv ret, TCGv arg1,
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tcg_temp_free(t1);
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tcg_gen_shri_tl(cpu_ca, cpu_ca, 32); /* extract bit 32 */
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tcg_gen_andi_tl(cpu_ca, cpu_ca, 1);
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if (is_isa300(ctx)) {
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tcg_gen_mov_tl(cpu_ca32, cpu_ca);
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}
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} else if (add_ca) {
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TCGv zero, inv1 = tcg_temp_new();
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tcg_gen_not_tl(inv1, arg1);
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zero = tcg_const_tl(0);
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tcg_gen_add2_tl(t0, cpu_ca, arg2, zero, cpu_ca, zero);
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tcg_gen_add2_tl(t0, cpu_ca, t0, cpu_ca, inv1, zero);
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gen_op_arith_compute_ca32(ctx, t0, inv1, arg2, 0);
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tcg_temp_free(zero);
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tcg_temp_free(inv1);
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} else {
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tcg_gen_setcond_tl(TCG_COND_GEU, cpu_ca, arg2, arg1);
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tcg_gen_sub_tl(t0, arg2, arg1);
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gen_op_arith_compute_ca32(ctx, t0, arg1, arg2, 1);
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}
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} else if (add_ca) {
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/* Since we're ignoring carry-out, we can simplify the
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