diff mbox series

[v6,2/7] target/riscv: rvv: Replace VSTART_CHECK_EARLY_EXIT in vext_ldst_us

Message ID 20240918171412.150107-3-max.chou@sifive.com (mailing list archive)
State New
Headers show
Series Improve the performance of RISC-V vector unit-stride/whole register ld/st instructions | expand

Commit Message

Max Chou Sept. 18, 2024, 5:14 p.m. UTC 
Because the real vl (evl) of vext_ldst_us may be different (e.g.
vlm.v/vsm.v/etc.), so the VSTART_CHECK_EARLY_EXIT checking function
should be replaced by checking evl in vext_ldst_us.

Signed-off-by: Max Chou <max.chou@sifive.com>
---
 target/riscv/vector_helper.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/target/riscv/vector_helper.c b/target/riscv/vector_helper.c
index 87d2399c7e3..967bb2687ae 100644
--- a/target/riscv/vector_helper.c
+++ b/target/riscv/vector_helper.c
@@ -276,7 +276,10 @@  vext_ldst_us(void *vd, target_ulong base, CPURISCVState *env, uint32_t desc,
     uint32_t max_elems = vext_max_elems(desc, log2_esz);
     uint32_t esz = 1 << log2_esz;
 
-    VSTART_CHECK_EARLY_EXIT(env);
+    if (env->vstart >= evl) {
+        env->vstart = 0;
+        return;
+    }
 
     /* load bytes from guest memory */
     for (i = env->vstart; i < evl; env->vstart = ++i) {