From 7d4854edcee2f20944466729e944d40809d4554c Mon Sep 17 00:00:00 2001
From: sstamenk <strahinja.stamenkovic@amd.com>
Date: Fri, 25 Jul 2025 15:40:13 +0200
Subject: [PATCH] warpSize is being made non constexpr in ROCm 7.0

---
 csrc/kernels.hip | 20 ++++++++++++--------
 csrc/ops.hip     |  8 +++++++-
 2 files changed, 19 insertions(+), 9 deletions(-)

diff --git a/csrc/kernels.hip b/csrc/kernels.hip
index ec3f7f025..58f6ed065 100644
--- a/csrc/kernels.hip
+++ b/csrc/kernels.hip
@@ -2109,7 +2109,11 @@ __global__ void kdequant_mm_int32_fp16(
 #define DENORM 1.0f/127.0f
 #define MAX_SPARSE_COUNT 32
 #define SMEM_SIZE 8*256
-#define WARP_SIZE warpSize
+#if defined(__GFX9__)
+  #define WARP_SIZE 64
+#else
+  #define WARP_SIZE 32
+#endif
 template <typename T, int SPMM_ITEMS, int BITS>
 __global__ void kspmm_coo_very_sparse_naive(int *max_count, int *max_idx, int *offset_rowidx, int *rowidx, int *colidx, half *values, T *B, half *out, float * __restrict__ const dequant_stats, int nnz, int rowsA, int rowsB, int colsB)
 {
@@ -2708,13 +2712,13 @@ template <typename T, int THREADS, int BITS> __global__ void kgemm_4bit_inferenc
   // load step-by-step in chunks of [warp_size,warps]: 1xwarp_size * [warp_size,warps] -> [1,warps]
   // 4 warps -> 4 loads per iter
   // 1xwarp_size * warp_sizex4 -> 1x4 outputs per thread block
-  typedef hipcub::WarpReduce<float, warpSize> WarpReduce;
-  __shared__ typename WarpReduce::TempStorage temp_storage[THREADS/warpSize];
+  typedef hipcub::WarpReduce<float, WARP_SIZE> WarpReduce;
+  __shared__ typename WarpReduce::TempStorage temp_storage[THREADS/WARP_SIZE];
 
-  const int warp_idx = threadIdx.x / warpSize;
-  const int warp_lane = threadIdx.x % warpSize;
-  const int row_B = (THREADS/warpSize)*blockIdx.x + warp_idx;
-  const int offset_B = ldb*row_B;
+  const int warp_idx = threadIdx.x / WARP_SIZE;
+  const int warp_lane = threadIdx.x % WARP_SIZE;
+  const int row_B = (THREADS/WARP_SIZE)*blockIdx.x + warp_idx;
+  const int offset_B = ldb * row_B;
   const int num_values_8bit = num_values_4bit/2;
   float local_C = 0.0f;
 
@@ -2732,7 +2736,7 @@ template <typename T, int THREADS, int BITS> __global__ void kgemm_4bit_inferenc
 
   // A: [1, K]
   // B: [M, K]
-  for(int inner_idx = warp_lane*num_values_4bit; inner_idx < K; inner_idx += warpSize*num_values_4bit)
+  for(int inner_idx = warp_lane*num_values_4bit; inner_idx < K; inner_idx += WARP_SIZE*num_values_4bit)
   {
     const int inner_idx_halved = inner_idx/2;
 
diff --git a/csrc/ops.hip b/csrc/ops.hip
index 260b74b30..b26d138e1 100644
--- a/csrc/ops.hip
+++ b/csrc/ops.hip
@@ -20,6 +20,12 @@
 
 #define ERR_NOT_IMPLEMENTED 100
 
+#if defined(__GFX9__)
+  #define WARP_SIZE 64
+#else
+  #define WARP_SIZE 32
+#endif
+
 using namespace BinSearch;
 using std::cout;
 using std::endl;
@@ -692,7 +698,7 @@ template <typename T, int BITS> void gemm_4bit_inference_naive(int m, int n, int
 	//warpsize - 32
         int num_blocks = (m+3)/4;
 	//warpsize - 64
-        if (warpSize == 64) {
+        if (WARP_SIZE == 64) {
           num_blocks = (m+1)/2;
         }