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| author | Nikunj A Dadhania <nikunj@linux.vnet.ibm.com> | 2017-02-27 10:27:56 +0530 |
|---|---|---|
| committer | David Gibson <david@gibson.dropbear.id.au> | 2017-03-01 11:23:39 +1100 |
| commit | 33903d0aa4191cbe7cd9e3b9019e11a2bb97aa14 (patch) | |
| tree | bba00ce1ff138bdc8b64743ced8f40ec3890f4b0 /target/ppc/translate.c | |
| parent | 6b10d008a0c779e1226d197dfb9ba796559c1381 (diff) | |
| download | qemu-33903d0aa4191cbe7cd9e3b9019e11a2bb97aa14.tar.gz | |
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>
Diffstat (limited to 'target/ppc/translate.c')
| -rw-r--r-- | target/ppc/translate.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/target/ppc/translate.c b/target/ppc/translate.c index eba83efbbd..e083082814 100644 --- a/target/ppc/translate.c +++ b/target/ppc/translate.c @@ -827,7 +827,11 @@ static inline void gen_op_arith_compute_ca32(DisasContext *ctx, } t0 = tcg_temp_new(); - tcg_gen_xor_tl(t0, arg0, arg1); + if (sub) { + tcg_gen_eqv_tl(t0, arg0, arg1); + } else { + tcg_gen_xor_tl(t0, arg0, arg1); + } tcg_gen_xor_tl(t0, t0, res); tcg_gen_extract_tl(cpu_ca32, t0, 32, 1); tcg_temp_free(t0); @@ -1378,17 +1382,22 @@ static inline void gen_op_arith_subf(DisasContext *ctx, TCGv ret, TCGv arg1, tcg_temp_free(t1); tcg_gen_shri_tl(cpu_ca, cpu_ca, 32); /* extract bit 32 */ tcg_gen_andi_tl(cpu_ca, cpu_ca, 1); + if (is_isa300(ctx)) { + tcg_gen_mov_tl(cpu_ca32, cpu_ca); + } } else if (add_ca) { TCGv zero, inv1 = tcg_temp_new(); tcg_gen_not_tl(inv1, arg1); zero = tcg_const_tl(0); tcg_gen_add2_tl(t0, cpu_ca, arg2, zero, cpu_ca, zero); tcg_gen_add2_tl(t0, cpu_ca, t0, cpu_ca, inv1, zero); + gen_op_arith_compute_ca32(ctx, t0, inv1, arg2, 0); tcg_temp_free(zero); tcg_temp_free(inv1); } else { tcg_gen_setcond_tl(TCG_COND_GEU, cpu_ca, arg2, arg1); tcg_gen_sub_tl(t0, arg2, arg1); + gen_op_arith_compute_ca32(ctx, t0, arg1, arg2, 1); } } else if (add_ca) { /* Since we're ignoring carry-out, we can simplify the |