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Add convergent attribute to vx_barrier

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Note this attribute is only supported by Clang, so this will only be
applied to the kernel binary but not runtime.
This commit is contained in:
Hansung Kim
2024-10-02 10:57:45 -07:00
parent 221d5f75c2
commit 6f6ee5616f
2 changed files with 3 additions and 0 deletions
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2
kernel/include/gemmini_mmio.h
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@@ -9,6 +9,8 @@
// #define SMEM_SIZE 0x4000 // #define SMEM_SIZE 0x4000
// 64KB // 64KB
// #define SMEM_SIZE 0x10000 // #define SMEM_SIZE 0x10000
// 128KB
// #define SMEM_SIZE 0x20000
// 256KB // 256KB
#define SMEM_SIZE 0x40000 #define SMEM_SIZE 0x40000

1
kernel/include/vx_intrinsics.h
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@@ -149,6 +149,7 @@ inline void vx_join(unsigned stack_ptr) {
} }
// Warp Barrier // Warp Barrier
__attribute__((convergent))
inline void vx_barrier(unsigned barried_id, unsigned num_warps) { inline void vx_barrier(unsigned barried_id, unsigned num_warps) {
asm volatile (".insn r %0, 4, 0, x0, %1, %2" :: "i"(RISCV_CUSTOM0), "r"(barried_id), "r"(num_warps)); asm volatile (".insn r %0, 4, 0, x0, %1, %2" :: "i"(RISCV_CUSTOM0), "r"(barried_id), "r"(num_warps));
} }