diff options
| author | Richard Henderson <richard.henderson@linaro.org> | 2021-12-13 09:38:38 -0800 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2021-12-23 17:47:01 -0800 |
| commit | 05bfd4db08608bc4c22de729780c1f74612fbc0e (patch) | |
| tree | 0828ad00145351584c77a6e3ec71952f79494372 /target/hppa | |
| parent | f18155a207dbc6a23f06a4af667280743819c31e (diff) | |
target/hppa: Fix deposit assert from trans_shrpw_imm
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.
Cc: qemu-stable@nongnu.org
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/635
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'target/hppa')
| -rw-r--r-- | target/hppa/translate.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/target/hppa/translate.c b/target/hppa/translate.c index 3b9744deb4..952027a28e 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 @@ -3204,19 +3206,22 @@ static bool trans_shrpw_imm(DisasContext *ctx, arg_shrpw_imm *a) dest = dest_gpr(ctx, a->t); t2 = load_gpr(ctx, a->r2); - if (a->r1 == 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); tcg_gen_rotri_i32(t32, t32, sa); tcg_gen_extu_i32_reg(dest, t32); tcg_temp_free_i32(t32); - } else if (a->r1 == 0) { - tcg_gen_extract_reg(dest, t2, sa, 32 - sa); } 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); |