diff options
| author | Piyush Patle <[email protected]> | 2026-10-14 06:43:49 +0530 |
|---|---|---|
| committer | GitHub <[email protected]> | 2026-10-14 09:13:49 +0800 |
| commit | f9436bb5bdabb9670792b22f79467b0ef16bff47 (patch) | |
| tree | 909f5655d07898cdce5b07e17903c92b9408eb31 /libcpu | |
| parent | 270a18d29239b92f21b4c8c0ac18d3a89e660da9 (diff) | |
[risc-v][vector] Restore vstart after vector configuration
Diffstat (limited to 'libcpu')
| -rw-r--r-- | libcpu/risc-v/vector/rvv-1.0/rvv_context.h | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/libcpu/risc-v/vector/rvv-1.0/rvv_context.h b/libcpu/risc-v/vector/rvv-1.0/rvv_context.h index 4466b3aeff..f5ec4d4ae8 100644 --- a/libcpu/risc-v/vector/rvv-1.0/rvv_context.h +++ b/libcpu/risc-v/vector/rvv-1.0/rvv_context.h @@ -12,17 +12,20 @@ #define __RVV_CONTEXT_1_0_H__ #if defined(ARCH_VECTOR_VLEN_128) - #define CTX_VECTOR_REGS 64 +#define CTX_VECTOR_REGS 64 #elif defined(ARCH_VECTOR_VLEN_256) - #define CTX_VECTOR_REGS 128 +#define CTX_VECTOR_REGS 128 #else #error "No supported VLEN" #endif /* VLEN */ -#define CTX_VECTOR_REG_NR (CTX_VECTOR_REGS + 4) +#define CTX_VECTOR_REG_NR (CTX_VECTOR_REGS + 4) #ifdef __ASSEMBLY__ +/* The following macros contain assembler, not C. */ +/* clang-format off */ + /** * ================================== * VECTOR EXTENSION @@ -97,16 +100,19 @@ mv t1, t0 - LOAD t0, VEC_FRAME_VSTART(t1) - csrw vstart, t0 LOAD t0, VEC_FRAME_VCSR(t1) csrw vcsr, t0 LOAD t0, VEC_FRAME_VTYPE(t1) LOAD t3, VEC_FRAME_VL(t1) VEC_CONFIG_SET_VL_VTYPE(t3, t0) + + /* vsetvl resets vstart, so restore the restart index last. */ + LOAD t0, VEC_FRAME_VSTART(t1) + csrw vstart, t0 .endm +/* clang-format on */ #endif #endif /* __RVV_CONTEXT_H__ */ |