[PATCH v6 1/4] target/riscv: add vector extension field in CPURISCVState

[LIU Zhiwei <zhiwei_liu@xxxxxxxxx>]

The 32 vector registers will be viewed as a continuous memory block.
It avoids the convension between element index and (regno, offset).
Thus elements can be directly accessed by offset from the first vector
base address.

Signed-off-by: LIU Zhiwei <zhiwei_liu@xxxxxxxxx>
Acked-by: Alistair Francis <alistair.francis@xxxxxxx>
Reviewed-by: Richard Henderson <richard.henderson@xxxxxxxxxx>
---
 target/riscv/cpu.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index de0a8d893a..2e8d01c155 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -64,6 +64,7 @@
 #define RVA RV('A')
 #define RVF RV('F')
 #define RVD RV('D')
+#define RVV RV('V')
 #define RVC RV('C')
 #define RVS RV('S')
 #define RVU RV('U')
@@ -93,9 +94,20 @@ typedef struct CPURISCVState CPURISCVState;
 
 #include "pmp.h"
 
+#define RV_VLEN_MAX 512
+
 struct CPURISCVState {
     target_ulong gpr[32];
     uint64_t fpr[32]; /* assume both F and D extensions */
+
+    /* vector coprocessor state. */
+    uint64_t vreg[32 * RV_VLEN_MAX / 64] QEMU_ALIGNED(16);
+    target_ulong vxrm;
+    target_ulong vxsat;
+    target_ulong vl;
+    target_ulong vstart;
+    target_ulong vtype;
+
     target_ulong pc;
     target_ulong load_res;
     target_ulong load_val;
-- 
2.23.0