[Qemu-devel] [PATCH 1/2] target/riscv: Split out mstatus_fs from tb_flags during translation

[Richard Henderson]

We will want to track changes to mstatus_fs through the TB.
As there is nothing else in tb_flags at the moment, remove
the variable from DisasContext.

Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
---
 target/riscv/cpu.h       |  6 +++---
 target/riscv/translate.c | 10 +++++-----
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index 41e06ac0f9..d201dd3e90 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -269,8 +269,8 @@ void QEMU_NORETURN do_raise_exception_err(CPURISCVState 
*env,
 target_ulong cpu_riscv_get_fflags(CPURISCVState *env);
 void cpu_riscv_set_fflags(CPURISCVState *env, target_ulong);
 
-#define TB_FLAGS_MMU_MASK  3
-#define TB_FLAGS_FP_ENABLE MSTATUS_FS
+#define TB_FLAGS_MMU_MASK   3
+#define TB_FLAGS_MSTATUS_FS MSTATUS_FS
 
 static inline void cpu_get_tb_cpu_state(CPURISCVState *env, target_ulong *pc,
                                         target_ulong *cs_base, uint32_t *flags)
@@ -278,7 +278,7 @@ static inline void cpu_get_tb_cpu_state(CPURISCVState *env, 
target_ulong *pc,
     *pc = env->pc;
     *cs_base = 0;
 #ifdef CONFIG_USER_ONLY
-    *flags = TB_FLAGS_FP_ENABLE;
+    *flags = TB_FLAGS_MSTATUS_FS;
 #else
     *flags = cpu_mmu_index(env, 0) | (env->mstatus & MSTATUS_FS);
 #endif
diff --git a/target/riscv/translate.c b/target/riscv/translate.c
index 808eab7f50..a30724aa90 100644
--- a/target/riscv/translate.c
+++ b/target/riscv/translate.c
@@ -43,7 +43,7 @@ typedef struct DisasContext {
     target_ulong pc;
     target_ulong next_pc;
     uint32_t opcode;
-    uint32_t flags;
+    uint32_t mstatus_fs;
     uint32_t mem_idx;
     int singlestep_enabled;
     int bstate;
@@ -665,7 +665,7 @@ static void gen_fp_load(DisasContext *ctx, uint32_t opc, 
int rd,
 {
     TCGv t0;
 
-    if (!(ctx->flags & TB_FLAGS_FP_ENABLE)) {
+    if (ctx->mstatus_fs == 0) {
         gen_exception_illegal(ctx);
         return;
     }
@@ -695,7 +695,7 @@ static void gen_fp_store(DisasContext *ctx, uint32_t opc, 
int rs1,
 {
     TCGv t0;
 
-    if (!(ctx->flags & TB_FLAGS_FP_ENABLE)) {
+    if (ctx->mstatus_fs == 0) {
         gen_exception_illegal(ctx);
         return;
     }
@@ -986,7 +986,7 @@ static void gen_fp_arith(DisasContext *ctx, uint32_t opc, 
int rd,
 {
     TCGv t0 = NULL;
 
-    if (!(ctx->flags & TB_FLAGS_FP_ENABLE)) {
+    if (ctx->mstatus_fs == 0) {
         goto do_illegal;
     }
 
@@ -1862,8 +1862,8 @@ void gen_intermediate_code(CPUState *cs, TranslationBlock 
*tb)
 
     ctx.tb = tb;
     ctx.bstate = BS_NONE;
-    ctx.flags = tb->flags;
     ctx.mem_idx = tb->flags & TB_FLAGS_MMU_MASK;
+    ctx.mstatus_fs = tb->flags & TB_FLAGS_MSTATUS_FS;
     ctx.frm = -1;  /* unknown rounding mode */
 
     num_insns = 0;
-- 
2.14.3