target/tricore: Move translate feature check to ctx

this allows us to remove the references to env from ctx. This also fixes
a segfault that was due to the unititalized ctx->env ptr.

Reported-by: Andreas Konopik <andreas.konopik@fau.de>
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Message-Id: <20200529072148.284037-3-kbastian@mail.uni-paderborn.de>

1 files changed, 33 insertions, 27 deletions

diff --git a/target/tricore/translate.c b/target/tricore/translate.c
index 65a33e5ad8..608f72d384 100644
--- a/target/tricore/translate.c
+++ b/target/tricore/translate.c
@@ -66,14 +66,19 @@ static const char *regnames_d[] = {
 
 typedef struct DisasContext {
     DisasContextBase base;
-    CPUTriCoreState *env;
     target_ulong pc_succ_insn;
     uint32_t opcode;
     /* Routine used to access memory */
     int mem_idx;
     uint32_t hflags, saved_hflags;
+    uint64_t features;
 } DisasContext;
 
+static int has_feature(DisasContext *ctx, int feature)
+{
+    return (ctx->features & (1ULL << feature)) != 0;
+}
+
 enum {
     MODE_LL = 0,
     MODE_LU = 1,
@@ -370,7 +375,7 @@ static void gen_swapmsk(DisasContext *ctx, int reg, TCGv ea)
    These makros also specify in which ISA version the csfr was introduced. */
 #define R(ADDRESS, REG, FEATURE)                                         \
     case ADDRESS:                                                        \
-        if (tricore_feature(ctx->env, FEATURE)) {                        \
+        if (has_feature(ctx, FEATURE)) {                             \
             tcg_gen_ld_tl(ret, cpu_env, offsetof(CPUTriCoreState, REG)); \
         }                                                                \
         break;
@@ -395,7 +400,7 @@ static inline void gen_mfcr(DisasContext *ctx, TCGv ret, int32_t offset)
                                     since no execption occurs */
 #define A(ADDRESS, REG, FEATURE) R(ADDRESS, REG, FEATURE)                \
     case ADDRESS:                                                        \
-        if (tricore_feature(ctx->env, FEATURE)) {                        \
+        if (has_feature(ctx, FEATURE)) {                             \
             tcg_gen_st_tl(r1, cpu_env, offsetof(CPUTriCoreState, REG));  \
         }                                                                \
         break;
@@ -3158,7 +3163,7 @@ gen_dvinit_b(DisasContext *ctx, TCGv rl, TCGv rh, TCGv r1, TCGv r2)
 {
     TCGv_i64 ret = tcg_temp_new_i64();
 
-    if (!tricore_feature(ctx->env, TRICORE_FEATURE_131)) {
+    if (!has_feature(ctx, TRICORE_FEATURE_131)) {
         gen_helper_dvinit_b_13(ret, cpu_env, r1, r2);
     } else {
         gen_helper_dvinit_b_131(ret, cpu_env, r1, r2);
@@ -3173,7 +3178,7 @@ gen_dvinit_h(DisasContext *ctx, TCGv rl, TCGv rh, TCGv r1, TCGv r2)
 {
     TCGv_i64 ret = tcg_temp_new_i64();
 
-    if (!tricore_feature(ctx->env, TRICORE_FEATURE_131)) {
+    if (!has_feature(ctx, TRICORE_FEATURE_131)) {
         gen_helper_dvinit_h_13(ret, cpu_env, r1, r2);
     } else {
         gen_helper_dvinit_h_131(ret, cpu_env, r1, r2);
@@ -3655,7 +3660,7 @@ static void decode_src_opc(DisasContext *ctx, int op1)
         tcg_gen_movi_tl(cpu_gpr_a[r1], const4);
         break;
     case OPC1_16_SRC_MOV_E:
-        if (tricore_feature(ctx->env, TRICORE_FEATURE_16)) {
+        if (has_feature(ctx, TRICORE_FEATURE_16)) {
             tcg_gen_movi_tl(cpu_gpr_d[r1], const4);
             tcg_gen_sari_tl(cpu_gpr_d[r1+1], cpu_gpr_d[r1], 31);
         } else {
@@ -4106,7 +4111,7 @@ static void decode_16Bit_opc(DisasContext *ctx)
         break;
     case OPC1_16_SBC_JEQ2:
     case OPC1_16_SBC_JNE2:
-        if (tricore_feature(ctx->env, TRICORE_FEATURE_16)) {
+        if (has_feature(ctx, TRICORE_FEATURE_16)) {
             address = MASK_OP_SBC_DISP4(ctx->opcode);
             const16 = MASK_OP_SBC_CONST4_SEXT(ctx->opcode);
             gen_compute_branch(ctx, op1, 0, 0, const16, address);
@@ -4124,7 +4129,7 @@ static void decode_16Bit_opc(DisasContext *ctx)
 /* SBR-format */
     case OPC1_16_SBR_JEQ2:
     case OPC1_16_SBR_JNE2:
-        if (tricore_feature(ctx->env, TRICORE_FEATURE_16)) {
+        if (has_feature(ctx, TRICORE_FEATURE_16)) {
             r1 = MASK_OP_SBR_S2(ctx->opcode);
             address = MASK_OP_SBR_DISP4(ctx->opcode);
             gen_compute_branch(ctx, op1, r1, 0, 0, address);
@@ -4704,13 +4709,13 @@ static void decode_bo_addrmode_post_pre_base(DisasContext *ctx)
         break;
     case OPC2_32_BO_CACHEI_WI_SHORTOFF:
     case OPC2_32_BO_CACHEI_W_SHORTOFF:
-        if (!tricore_feature(ctx->env, TRICORE_FEATURE_131)) {
+        if (!has_feature(ctx, TRICORE_FEATURE_131)) {
             generate_trap(ctx, TRAPC_INSN_ERR, TIN2_IOPC);
         }
         break;
     case OPC2_32_BO_CACHEI_W_POSTINC:
     case OPC2_32_BO_CACHEI_WI_POSTINC:
-        if (tricore_feature(ctx->env, TRICORE_FEATURE_131)) {
+        if (has_feature(ctx, TRICORE_FEATURE_131)) {
             tcg_gen_addi_tl(cpu_gpr_a[r2], cpu_gpr_a[r2], off10);
         } else {
             generate_trap(ctx, TRAPC_INSN_ERR, TIN2_IOPC);
@@ -4718,7 +4723,7 @@ static void decode_bo_addrmode_post_pre_base(DisasContext *ctx)
         break;
     case OPC2_32_BO_CACHEI_W_PREINC:
     case OPC2_32_BO_CACHEI_WI_PREINC:
-        if (tricore_feature(ctx->env, TRICORE_FEATURE_131)) {
+        if (has_feature(ctx, TRICORE_FEATURE_131)) {
             tcg_gen_addi_tl(cpu_gpr_a[r2], cpu_gpr_a[r2], off10);
         } else {
             generate_trap(ctx, TRAPC_INSN_ERR, TIN2_IOPC);
@@ -5372,7 +5377,7 @@ static void decode_bol_opc(DisasContext *ctx, int32_t op1)
         tcg_gen_addi_tl(cpu_gpr_a[r1], cpu_gpr_a[r2], address);
         break;
     case OPC1_32_BOL_ST_A_LONGOFF:
-        if (tricore_feature(ctx->env, TRICORE_FEATURE_16)) {
+        if (has_feature(ctx, TRICORE_FEATURE_16)) {
             gen_offset_st(ctx, cpu_gpr_a[r1], cpu_gpr_a[r2], address, MO_LEUL);
         } else {
             generate_trap(ctx, TRAPC_INSN_ERR, TIN2_IOPC);
@@ -5382,42 +5387,42 @@ static void decode_bol_opc(DisasContext *ctx, int32_t op1)
         gen_offset_st(ctx, cpu_gpr_d[r1], cpu_gpr_a[r2], address, MO_LEUL);
         break;
     case OPC1_32_BOL_LD_B_LONGOFF:
-        if (tricore_feature(ctx->env, TRICORE_FEATURE_16)) {
+        if (has_feature(ctx, TRICORE_FEATURE_16)) {
             gen_offset_ld(ctx, cpu_gpr_d[r1], cpu_gpr_a[r2], address, MO_SB);
         } else {
             generate_trap(ctx, TRAPC_INSN_ERR, TIN2_IOPC);
         }
         break;
     case OPC1_32_BOL_LD_BU_LONGOFF:
-        if (tricore_feature(ctx->env, TRICORE_FEATURE_16)) {
+        if (has_feature(ctx, TRICORE_FEATURE_16)) {
             gen_offset_ld(ctx, cpu_gpr_d[r1], cpu_gpr_a[r2], address, MO_UB);
         } else {
             generate_trap(ctx, TRAPC_INSN_ERR, TIN2_IOPC);
         }
         break;
     case OPC1_32_BOL_LD_H_LONGOFF:
-        if (tricore_feature(ctx->env, TRICORE_FEATURE_16)) {
+        if (has_feature(ctx, TRICORE_FEATURE_16)) {
             gen_offset_ld(ctx, cpu_gpr_d[r1], cpu_gpr_a[r2], address, MO_LESW);
         } else {
             generate_trap(ctx, TRAPC_INSN_ERR, TIN2_IOPC);
         }
         break;
     case OPC1_32_BOL_LD_HU_LONGOFF:
-        if (tricore_feature(ctx->env, TRICORE_FEATURE_16)) {
+        if (has_feature(ctx, TRICORE_FEATURE_16)) {
             gen_offset_ld(ctx, cpu_gpr_d[r1], cpu_gpr_a[r2], address, MO_LEUW);
         } else {
             generate_trap(ctx, TRAPC_INSN_ERR, TIN2_IOPC);
         }
         break;
     case OPC1_32_BOL_ST_B_LONGOFF:
-        if (tricore_feature(ctx->env, TRICORE_FEATURE_16)) {
+        if (has_feature(ctx, TRICORE_FEATURE_16)) {
             gen_offset_st(ctx, cpu_gpr_d[r1], cpu_gpr_a[r2], address, MO_SB);
         } else {
             generate_trap(ctx, TRAPC_INSN_ERR, TIN2_IOPC);
         }
         break;
     case OPC1_32_BOL_ST_H_LONGOFF:
-        if (tricore_feature(ctx->env, TRICORE_FEATURE_16)) {
+        if (has_feature(ctx, TRICORE_FEATURE_16)) {
             gen_offset_st(ctx, cpu_gpr_d[r1], cpu_gpr_a[r2], address, MO_LESW);
         } else {
             generate_trap(ctx, TRAPC_INSN_ERR, TIN2_IOPC);
@@ -6022,7 +6027,7 @@ static void decode_rlc_opc(DisasContext *ctx,
         tcg_gen_movi_tl(cpu_gpr_d[r2], const16);
         break;
     case OPC1_32_RLC_MOV_64:
-        if (tricore_feature(ctx->env, TRICORE_FEATURE_16)) {
+        if (has_feature(ctx, TRICORE_FEATURE_16)) {
             CHECK_REG_PAIR(r2);
             tcg_gen_movi_tl(cpu_gpr_d[r2], const16);
             tcg_gen_movi_tl(cpu_gpr_d[r2+1], const16 >> 15);
@@ -6248,7 +6253,7 @@ static void decode_rr_accumulator(DisasContext *ctx)
         tcg_gen_mov_tl(cpu_gpr_d[r3], cpu_gpr_d[r2]);
         break;
     case OPC2_32_RR_MOV_64:
-        if (tricore_feature(ctx->env, TRICORE_FEATURE_16)) {
+        if (has_feature(ctx, TRICORE_FEATURE_16)) {
             temp = tcg_temp_new();
 
             CHECK_REG_PAIR(r3);
@@ -6262,7 +6267,7 @@ static void decode_rr_accumulator(DisasContext *ctx)
         }
         break;
     case OPC2_32_RR_MOVS_64:
-        if (tricore_feature(ctx->env, TRICORE_FEATURE_16)) {
+        if (has_feature(ctx, TRICORE_FEATURE_16)) {
             CHECK_REG_PAIR(r3);
             tcg_gen_mov_tl(cpu_gpr_d[r3], cpu_gpr_d[r2]);
             tcg_gen_sari_tl(cpu_gpr_d[r3 + 1], cpu_gpr_d[r2], 31);
@@ -6602,7 +6607,7 @@ static void decode_rr_divide(DisasContext *ctx)
         tcg_gen_shri_tl(temp3, cpu_gpr_d[r1], 8);
         /* reset av */
         tcg_gen_movi_tl(cpu_PSW_AV, 0);
-        if (!tricore_feature(ctx->env, TRICORE_FEATURE_131)) {
+        if (!has_feature(ctx, TRICORE_FEATURE_131)) {
             /* overflow = (abs(D[r3+1]) >= abs(D[r2])) */
             tcg_gen_abs_tl(temp, temp3);
             tcg_gen_abs_tl(temp2, cpu_gpr_d[r2]);
@@ -6635,7 +6640,7 @@ static void decode_rr_divide(DisasContext *ctx)
         tcg_gen_shri_tl(temp3, cpu_gpr_d[r1], 16);
         /* reset av */
         tcg_gen_movi_tl(cpu_PSW_AV, 0);
-        if (!tricore_feature(ctx->env, TRICORE_FEATURE_131)) {
+        if (!has_feature(ctx, TRICORE_FEATURE_131)) {
             /* overflow = (abs(D[r3+1]) >= abs(D[r2])) */
             tcg_gen_abs_tl(temp, temp3);
             tcg_gen_abs_tl(temp2, cpu_gpr_d[r2]);
@@ -6698,14 +6703,14 @@ static void decode_rr_divide(DisasContext *ctx)
         gen_unpack(cpu_gpr_d[r3], cpu_gpr_d[r3+1], cpu_gpr_d[r1]);
         break;
     case OPC2_32_RR_CRC32:
-        if (tricore_feature(ctx->env, TRICORE_FEATURE_161)) {
+        if (has_feature(ctx, TRICORE_FEATURE_161)) {
             gen_helper_crc32(cpu_gpr_d[r3], cpu_gpr_d[r1], cpu_gpr_d[r2]);
         } else {
             generate_trap(ctx, TRAPC_INSN_ERR, TIN2_IOPC);
         }
         break;
     case OPC2_32_RR_DIV:
-        if (tricore_feature(ctx->env, TRICORE_FEATURE_16)) {
+        if (has_feature(ctx, TRICORE_FEATURE_16)) {
             GEN_HELPER_RR(divide, cpu_gpr_d[r3], cpu_gpr_d[r3+1], cpu_gpr_d[r1],
                           cpu_gpr_d[r2]);
         } else {
@@ -6713,7 +6718,7 @@ static void decode_rr_divide(DisasContext *ctx)
         }
         break;
     case OPC2_32_RR_DIV_U:
-        if (tricore_feature(ctx->env, TRICORE_FEATURE_16)) {
+        if (has_feature(ctx, TRICORE_FEATURE_16)) {
             GEN_HELPER_RR(divide_u, cpu_gpr_d[r3], cpu_gpr_d[r3+1],
                           cpu_gpr_d[r1], cpu_gpr_d[r2]);
         } else {
@@ -8411,7 +8416,7 @@ static void decode_sys_interrupts(DisasContext *ctx)
         gen_helper_svlcx(cpu_env);
         break;
     case OPC2_32_SYS_RESTORE:
-        if (tricore_feature(ctx->env, TRICORE_FEATURE_16)) {
+        if (has_feature(ctx, TRICORE_FEATURE_16)) {
             if ((ctx->hflags & TRICORE_HFLAG_KUU) == TRICORE_HFLAG_SM ||
                 (ctx->hflags & TRICORE_HFLAG_KUU) == TRICORE_HFLAG_UM1) {
                 tcg_gen_deposit_tl(cpu_ICR, cpu_ICR, cpu_gpr_d[r1], 8, 1);
@@ -8792,6 +8797,7 @@ static void tricore_tr_init_disas_context(DisasContextBase *dcbase,
     CPUTriCoreState *env = cs->env_ptr;
     ctx->mem_idx = cpu_mmu_index(env, false);
     ctx->hflags = (uint32_t)ctx->base.tb->flags;
+    ctx->features = env->features;
 }
 
 static void tricore_tr_tb_start(DisasContextBase *db, CPUState *cpu)