On 2019/9/11 下午10:51, Chih-Min Chao wrote:
On Wed, Sep 11, 2019 at 2:35 PM liuzhiwei <zhiwei_...@c-sky.com
<mailto:zhiwei_...@c-sky.com>> wrote:
From: LIU Zhiwei <zhiwei_...@c-sky.com <mailto:zhiwei_...@c-sky.com>>
Signed-off-by: LIU Zhiwei <zhiwei_...@c-sky.com
<mailto:zhiwei_...@c-sky.com>>
---
target/riscv/cpu.h | 28 ++++++++++++++++++++++++++++
1 file changed, 28 insertions(+)
diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index 0adb307..c992b1d 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -93,9 +93,37 @@ typedef struct CPURISCVState CPURISCVState;
#include "pmp.h"
+#define VLEN 128
+#define VUNIT(x) (VLEN / x)
+
struct CPURISCVState {
target_ulong gpr[32];
uint64_t fpr[32]; /* assume both F and D extensions */
+
+ /* vector coprocessor state. */
+ struct {
+ union VECTOR {
+ float64 f64[VUNIT(64)];
+ float32 f32[VUNIT(32)];
+ float16 f16[VUNIT(16)];
+ uint64_t u64[VUNIT(64)];
+ int64_t s64[VUNIT(64)];
+ uint32_t u32[VUNIT(32)];
+ int32_t s32[VUNIT(32)];
+ uint16_t u16[VUNIT(16)];
+ int16_t s16[VUNIT(16)];
+ uint8_t u8[VUNIT(8)];
+ int8_t s8[VUNIT(8)];
+ } vreg[32];
+ target_ulong vxrm;
+ target_ulong vxsat;
+ target_ulong vl;
+ target_ulong vstart;
+ target_ulong vtype;
+ float_status fp_status;
+ } vfp;
+
+ bool foflag;
target_ulong pc;
target_ulong load_res;
target_ulong load_val;
--
2.7.4
Could the VLEN be configurable in cpu initialization but not fixed in
compilation phase ?
Yes, it's important that VLEN is configurable to support different
types of cpu.
Take the integer element as example and the difference should be the
stride of vfp.vreg[x] isn't continuous
struct {
union VECTOR {
uint64_t *u64;
uint16_t *u16;
uint8_t *u8;
} vreg[32];
} vfp;
initialization
int vlen = 256; //parameter from cpu command line option
int elem = vlen / 8;
int size = elem * 32;
uint8_t *mem = malloc(size)
for (int idx = 0; idx < 32; ++idx) {
vfp.vreg[idx].u64 = (void *)&mem[idx * elem];
vfp.vreg[idx].u32 = (void *)&mem[idx * elem];
vfp.vreg[idx].u16 = (void *)&mem[idx * elem];
}
chihmin
It's a good idea. I will accept it.
Thanks for review.
Zhiwei
