| Message ID | 20211213185610.1987974-3-f4bug@amsat.org |
|---|---|
| State | New |
| Headers | show |
| Series | None | expand |
On 12/13/21 19:56, Philippe Mathieu-Daudé wrote: > From: Richard Henderson <richard.henderson@linaro.org> > > Because sa may be 0, > > tcg_gen_deposit_reg(dest, t0, cpu_gr[a->r1], 32 - sa, sa); > > may attempt a zero-width deposit at bit 32, which will assert > for TARGET_REGISTER_BITS == 32. > > Use the newer extract2 when possible, which itself includes the > rotri special case; otherwise mirror the code from trans_shrpw_sar, > using concat and shri. > > Resolves: https://gitlab.com/qemu-project/qemu/-/issues/635 > Signed-off-by: Richard Henderson <richard.henderson@linaro.org> > Message-Id: <20211213174248.29222-1-richard.henderson@linaro.org> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> > --- > target/hppa/translate.c | 13 +++++++++---- > 1 file changed, 9 insertions(+), 4 deletions(-) > > diff --git a/target/hppa/translate.c b/target/hppa/translate.c > index 261e4c75c7c..952027a28e1 100644 > --- a/target/hppa/translate.c > +++ b/target/hppa/translate.c > @@ -140,6 +140,7 @@ > #define tcg_gen_deposit_z_reg tcg_gen_deposit_z_i64 > #define tcg_gen_extract_reg tcg_gen_extract_i64 > #define tcg_gen_sextract_reg tcg_gen_sextract_i64 > +#define tcg_gen_extract2_reg tcg_gen_extract2_i64 > #define tcg_const_reg tcg_const_i64 > #define tcg_const_local_reg tcg_const_local_i64 > #define tcg_constant_reg tcg_constant_i64 > @@ -234,6 +235,7 @@ > #define tcg_gen_deposit_z_reg tcg_gen_deposit_z_i32 > #define tcg_gen_extract_reg tcg_gen_extract_i32 > #define tcg_gen_sextract_reg tcg_gen_sextract_i32 > +#define tcg_gen_extract2_reg tcg_gen_extract2_i32 > #define tcg_const_reg tcg_const_i32 > #define tcg_const_local_reg tcg_const_local_i32 > #define tcg_constant_reg tcg_constant_i32 > @@ -3206,6 +3208,8 @@ static bool trans_shrpw_imm(DisasContext *ctx, arg_shrpw_imm *a) > t2 = load_gpr(ctx, a->r2); > if (a->r1 == 0) { > tcg_gen_extract_reg(dest, t2, sa, 32 - sa); > + } else if (TARGET_REGISTER_BITS == 32) { > + tcg_gen_extract2_reg(dest, t2, cpu_gr[a->r1], sa); > } else if (a->r1 == a->r2) { > TCGv_i32 t32 = tcg_temp_new_i32(); > tcg_gen_trunc_reg_i32(t32, t2); > @@ -3213,10 +3217,11 @@ static bool trans_shrpw_imm(DisasContext *ctx, arg_shrpw_imm *a) > tcg_gen_extu_i32_reg(dest, t32); > tcg_temp_free_i32(t32); > } else { > - TCGv_reg t0 = tcg_temp_new(); > - tcg_gen_extract_reg(t0, t2, sa, 32 - sa); > - tcg_gen_deposit_reg(dest, t0, cpu_gr[a->r1], 32 - sa, sa); > - tcg_temp_free(t0); > + TCGv_i64 t64 = tcg_temp_new_i64(); > + tcg_gen_concat_reg_i64(t64, t2, cpu_gr[a->r1]); > + tcg_gen_shri_i64(t64, t64, sa); > + tcg_gen_trunc_i64_reg(dest, t64); > + tcg_temp_free_i64(t64); > } > save_gpr(ctx, a->t, dest); > >
diff --git a/target/hppa/translate.c b/target/hppa/translate.c index 261e4c75c7c..952027a28e1 100644 --- a/target/hppa/translate.c +++ b/target/hppa/translate.c @@ -140,6 +140,7 @@ #define tcg_gen_deposit_z_reg tcg_gen_deposit_z_i64 #define tcg_gen_extract_reg tcg_gen_extract_i64 #define tcg_gen_sextract_reg tcg_gen_sextract_i64 +#define tcg_gen_extract2_reg tcg_gen_extract2_i64 #define tcg_const_reg tcg_const_i64 #define tcg_const_local_reg tcg_const_local_i64 #define tcg_constant_reg tcg_constant_i64 @@ -234,6 +235,7 @@ #define tcg_gen_deposit_z_reg tcg_gen_deposit_z_i32 #define tcg_gen_extract_reg tcg_gen_extract_i32 #define tcg_gen_sextract_reg tcg_gen_sextract_i32 +#define tcg_gen_extract2_reg tcg_gen_extract2_i32 #define tcg_const_reg tcg_const_i32 #define tcg_const_local_reg tcg_const_local_i32 #define tcg_constant_reg tcg_constant_i32 @@ -3206,6 +3208,8 @@ static bool trans_shrpw_imm(DisasContext *ctx, arg_shrpw_imm *a) t2 = load_gpr(ctx, a->r2); if (a->r1 == 0) { tcg_gen_extract_reg(dest, t2, sa, 32 - sa); + } else if (TARGET_REGISTER_BITS == 32) { + tcg_gen_extract2_reg(dest, t2, cpu_gr[a->r1], sa); } else if (a->r1 == a->r2) { TCGv_i32 t32 = tcg_temp_new_i32(); tcg_gen_trunc_reg_i32(t32, t2); @@ -3213,10 +3217,11 @@ static bool trans_shrpw_imm(DisasContext *ctx, arg_shrpw_imm *a) tcg_gen_extu_i32_reg(dest, t32); tcg_temp_free_i32(t32); } else { - TCGv_reg t0 = tcg_temp_new(); - tcg_gen_extract_reg(t0, t2, sa, 32 - sa); - tcg_gen_deposit_reg(dest, t0, cpu_gr[a->r1], 32 - sa, sa); - tcg_temp_free(t0); + TCGv_i64 t64 = tcg_temp_new_i64(); + tcg_gen_concat_reg_i64(t64, t2, cpu_gr[a->r1]); + tcg_gen_shri_i64(t64, t64, sa); + tcg_gen_trunc_i64_reg(dest, t64); + tcg_temp_free_i64(t64); } save_gpr(ctx, a->t, dest);