[PATCH v2] target/riscv: Update check for Zca/Zcf/Zcd

[Weiwei Li]

Even though Zca/Zcf/Zcd can be included by C/F/D, however, their priv
version is higher than the priv version of C/F/D. So if we use check
for them instead of check for C/F/D totally, it will trigger new
problem when we try to disable the extensions based on the configured
priv version.

Signed-off-by: Weiwei Li <liweiwei@iscas.ac.cn>
Signed-off-by: Junqiang Wang <wangjunqiang@iscas.ac.cn>
---
v2:
* Fix code style errors

 target/riscv/insn_trans/trans_rvd.c.inc | 12 +++++++-----
 target/riscv/insn_trans/trans_rvf.c.inc | 14 ++++++++------
 target/riscv/insn_trans/trans_rvi.c.inc |  5 +++--
 target/riscv/translate.c                |  5 +++--
 4 files changed, 21 insertions(+), 15 deletions(-)

diff --git a/target/riscv/insn_trans/trans_rvd.c.inc 
b/target/riscv/insn_trans/trans_rvd.c.inc
index 2c51e01c40..6bdb55ef43 100644
--- a/target/riscv/insn_trans/trans_rvd.c.inc
+++ b/target/riscv/insn_trans/trans_rvd.c.inc
@@ -31,9 +31,11 @@
     } \
 } while (0)
 
-#define REQUIRE_ZCD(ctx) do { \
-    if (!ctx->cfg_ptr->ext_zcd) {  \
-        return false;     \
+#define REQUIRE_ZCD_OR_DC(ctx) do { \
+    if (!ctx->cfg_ptr->ext_zcd) { \
+        if (!has_ext(ctx, RVD) || !has_ext(ctx, RVC)) { \
+            return false; \
+        } \
     } \
 } while (0)
 
@@ -67,13 +69,13 @@ static bool trans_fsd(DisasContext *ctx, arg_fsd *a)
 
 static bool trans_c_fld(DisasContext *ctx, arg_fld *a)
 {
-    REQUIRE_ZCD(ctx);
+    REQUIRE_ZCD_OR_DC(ctx);
     return trans_fld(ctx, a);
 }
 
 static bool trans_c_fsd(DisasContext *ctx, arg_fsd *a)
 {
-    REQUIRE_ZCD(ctx);
+    REQUIRE_ZCD_OR_DC(ctx);
     return trans_fsd(ctx, a);
 }
 
diff --git a/target/riscv/insn_trans/trans_rvf.c.inc 
b/target/riscv/insn_trans/trans_rvf.c.inc
index 9e9fa2087a..593855e73a 100644
--- a/target/riscv/insn_trans/trans_rvf.c.inc
+++ b/target/riscv/insn_trans/trans_rvf.c.inc
@@ -30,10 +30,12 @@
     } \
 } while (0)
 
-#define REQUIRE_ZCF(ctx) do {                  \
-    if (!ctx->cfg_ptr->ext_zcf) {              \
-        return false;                          \
-    }                                          \
+#define REQUIRE_ZCF_OR_FC(ctx) do {                     \
+    if (!ctx->cfg_ptr->ext_zcf) {                       \
+        if (!has_ext(ctx, RVF) || !has_ext(ctx, RVC)) { \
+            return false;                               \
+        }                                               \
+    }                                                   \
 } while (0)
 
 static bool trans_flw(DisasContext *ctx, arg_flw *a)
@@ -69,13 +71,13 @@ static bool trans_fsw(DisasContext *ctx, arg_fsw *a)
 
 static bool trans_c_flw(DisasContext *ctx, arg_flw *a)
 {
-    REQUIRE_ZCF(ctx);
+    REQUIRE_ZCF_OR_FC(ctx);
     return trans_flw(ctx, a);
 }
 
 static bool trans_c_fsw(DisasContext *ctx, arg_fsw *a)
 {
-    REQUIRE_ZCF(ctx);
+    REQUIRE_ZCF_OR_FC(ctx);
     return trans_fsw(ctx, a);
 }
 
diff --git a/target/riscv/insn_trans/trans_rvi.c.inc 
b/target/riscv/insn_trans/trans_rvi.c.inc
index c70c495fc5..e33f63bea1 100644
--- a/target/riscv/insn_trans/trans_rvi.c.inc
+++ b/target/riscv/insn_trans/trans_rvi.c.inc
@@ -56,7 +56,7 @@ static bool trans_jalr(DisasContext *ctx, arg_jalr *a)
     tcg_gen_andi_tl(cpu_pc, cpu_pc, (target_ulong)-2);
 
     gen_set_pc(ctx, cpu_pc);
-    if (!ctx->cfg_ptr->ext_zca) {
+    if (!has_ext(ctx, RVC) && !ctx->cfg_ptr->ext_zca) {
         TCGv t0 = tcg_temp_new();
 
         misaligned = gen_new_label();
@@ -169,7 +169,8 @@ static bool gen_branch(DisasContext *ctx, arg_b *a, TCGCond 
cond)
 
     gen_set_label(l); /* branch taken */
 
-    if (!ctx->cfg_ptr->ext_zca && ((ctx->base.pc_next + a->imm) & 0x3)) {
+    if (!has_ext(ctx, RVC) && !ctx->cfg_ptr->ext_zca &&
+        ((ctx->base.pc_next + a->imm) & 0x3)) {
         /* misaligned */
         gen_exception_inst_addr_mis(ctx);
     } else {
diff --git a/target/riscv/translate.c b/target/riscv/translate.c
index d0094922b6..661e29ab39 100644
--- a/target/riscv/translate.c
+++ b/target/riscv/translate.c
@@ -551,7 +551,7 @@ static void gen_jal(DisasContext *ctx, int rd, target_ulong 
imm)
 
     /* check misaligned: */
     next_pc = ctx->base.pc_next + imm;
-    if (!ctx->cfg_ptr->ext_zca) {
+    if (!has_ext(ctx, RVC) && !ctx->cfg_ptr->ext_zca) {
         if ((next_pc & 0x3) != 0) {
             gen_exception_inst_addr_mis(ctx);
             return;
@@ -1137,7 +1137,8 @@ static void decode_opc(CPURISCVState *env, DisasContext 
*ctx, uint16_t opcode)
          * The Zca extension is added as way to refer to instructions in the C
          * extension that do not include the floating-point loads and stores
          */
-        if (ctx->cfg_ptr->ext_zca && decode_insn16(ctx, opcode)) {
+        if ((has_ext(ctx, RVC) || ctx->cfg_ptr->ext_zca) &&
+            decode_insn16(ctx, opcode)) {
             return;
         }
     } else {
-- 
2.25.1