Fix for warpSize deprecation in ROCm 7.0 (#1762)

* Port ROCm changes from multi-backend-refactor branch

* Update ops.py

* Update functional.py

* Update ops.py

* Update ops.py

* Update ops.py

* Update ops.py

* Update functional.py

* Update ops.py

* Update ops.py

* Update ops.py

* Update ops.py

* Update functional.py

* Update functional.py

* Update functional.py

* Update functional.py

* Update ops.py

* Update ops.py

* Update ops.py

* Update ops.py

* Update ops.py

* Update ops.py

* Update ops.py

* Update ops.py

* Update ops.py

* Update functional.py

* Update functional.py

* Update functional.py

* Update test_ops.py

* Update test_functional.py

* Update test_ops.py

* Update test_functional.py

* Update test_functional.py

* Update functional.py

* Update functional.py

* Update ops.py

* Update ops.py

* Update test_functional.py

* Update test_functional.py

* Update cextension.py

* Update cuda_specs.py

* Update cuda_specs.py

* Update test_functional.py

* Update test_linear4bit.py

* Update test_cuda_setup_evaluator.py

* Update test_functional.py

* Update modules.py

* Update modules.py

* Update ops.py

* Update test_linear4bit.py

* Update ops.py

* Update ops.py

* Update test_linear4bit.py

* Update test_linear4bit.py

* Update python-package.yml

* Update python-package.yml

* Update python-package.yml

* Update python-package.yml

* Create build-rocm.sh

* Update cuda_specs.py

* Fix trailing whitespace

* Remove conflicts.diff

* update for hipblasVersionMajor >=3

* Update test_functional.py

* Update test_linear4bit.py

* Update test_ops.py

* Update main.py

* Update test_functional.py

* Update test_linear4bit.py

* Update test_ops.py

* Update test_linear4bit.py

* Lint

* Lint

* Update helpers.py

* Update test_functional.py

* Update test_linear4bit.py

* Update test_ops.py

* Lint

* Update pythonInterface.cpp

* lint fix

* lint

* Update pythonInterface.cpp

* revert permissions change

* Fix indentation

* Update kernels_hip.cuh

* Update kernels.hip

* Update ops.hip

* Update ops_hip.cuh

* Update kernels_hip.cuh

* Update kernels.hip

* Update kernels.hip

* Update ops.hip

* Update ops_hip.cuh

* Update ops.hip

* Update CMakeLists.txt

* Update functional.py

* Update cextension.py

* Update cextension.py

* warpSize is being made non constexpr in ROCm 7.0

* Merge pull request #90 from ROCm/IFU-rocm_enabled-09-23-2025

Ifu rocm enabled 09 23 2025

* Fix typo

* unskip test_4bit_quant

---------
Co-authored-by: MISHANMAURYA <118961433+MISHANMAURYA@users.noreply.github.com>
Co-authored-by: MISHANMAUYRA <mishanmaurya31081@gmail.com>
Co-authored-by: amcamd <andrew.chapman@amd.com>
Co-authored-by: Prasanth Nunna <root@banff-cyxtera-s78-1.amd.com>
Co-authored-by: sstamenk <strahinja.stamenkovic@amd.com>

CMakeLists.txt

@@ -70,6 +70,7 @@ elseif(${COMPUTE_BACKEND} STREQUAL "xpu")
         message(FATAL_ERROR "XPU is not supported on macOS" )
     endif()
     set(BUILD_CUDA OFF)
+    set(BUILD_HIP OFF)
     set(BUILD_MPS OFF)
     set(BUILD_XPU ON)
 else()

csrc/kernels.hip

@@ -19,37 +19,42 @@
 #define NUM 4
 #define NUM_BLOCK 4096
 
-__device__ static float nf4_data[16] = {-1.0, -0.6961928009986877, -0.5250730514526367, -0.39491748809814453, -0.28444138169288635, -0.18477343022823334, -0.09105003625154495, 0.0, 0.07958029955625534, 0.16093020141124725, 0.24611230194568634, 0.33791524171829224, 0.44070982933044434, 0.5626170039176941, 0.7229568362236023, 1.0};
+__device__ static float fp4_dequantization_lut[8] = {
+    0.0f,            // 0b000
+    0.005208333333f, // 0b001
+    0.66666667f,     // 0b010
+    1.0f,            // 0b011
+    0.33333333f,     // 0b100
+    0.5f,            // 0b101
+    0.16666667f,     // 0b110
+    0.25f            // 0b111
+};
+
+__device__ static float nf4_dequantization_lut[16] = {
+    -1.0f,                 // 0b0000
+    -0.6961928009986877f,  // 0b0001
+    -0.5250730514526367f,  // 0b0010
+    -0.39491748809814453f, // 0b0011
+    -0.28444138169288635f, // 0b0100
+    -0.18477343022823334f, // 0b0101
+    -0.09105003625154495f, // 0b0110
+    0.0f,                  // 0b0111
+    0.07958029955625534f,  // 0b1000
+    0.16093020141124725f,  // 0b1001
+    0.24611230194568634f,  // 0b1010
+    0.33791524171829224f,  // 0b1011
+    0.44070982933044434f,  // 0b1100
+    0.5626170039176941f,   // 0b1101
+    0.7229568362236023f,   // 0b1110
+    1.0f                   // 0b1111
+};
 
 // source: https://stackoverflow.com/questions/17399119/how-do-i-use-atomicmax-on-floating-point-values-in-cuda
 // Luckily we have atomicmax and atomicmin in ROCm
 
-
-__device__ float dDequantizeFP4Tree(unsigned char val, float absmax)
-{
-  float sign = (val & 0b1000) == 8 ? -1.0f : 1.0f;
-  if((val & 0b0100) == 4) // 0
-    if((val & 0b0010) == 2) //01
-      if((val & 0b0001) == 1) // 111
-        return 0.25000000f*absmax*sign; // 1111
-      else
-        return 0.16666667f*absmax*sign; // 1110
-    else
-      if((val & 0b0001) == 1) // 110
-        return 0.50000000f*absmax*sign; // 1101
-      else
-        return 0.33333333f*absmax*sign; // 1100
-  else
-    if((val & 0b0010) == 2) //10
-      if((val & 0b0001) == 1) // 101
-        return 1.00000000f*absmax*sign; // 1011
-      else
-        return 0.66666667f*absmax*sign; // 1010
-    else
-      if((val & 0b0001) == 1) // 100
-        return 5.208333333e-03f*absmax*sign; // 1001
-      else
-        return 0.00000000f*absmax*sign; // 1000
+__device__ __forceinline__ float dDequantizeFP4Tree(unsigned char val) {
+    float sign = 1.0f - 2 * ((val & 0b1000) >> 3);
+    return fp4_dequantization_lut[val & 0b111] * sign;
 }
 
 __device__ unsigned char dQuantizeFP4(float x)
@@ -101,61 +106,7 @@ __device__ unsigned char dQuantizeFP4(float x)
         return 0b0000+sign;
 }
 
-
-__device__ __forceinline__ float dDequantizeNF4(unsigned char val)
-{
-
-  // the values for this tree was generated by test_normal_map_tree
-  // in the file tests/test_functional.py
-  if((val & 0b1000) == 8)
-    if((val & 0b0100) == 4) // 1
-      if((val & 0b0010) == 2) // 11
-        if((val & 0b0001) == 1) // 111
-          return 1.0f;
-        else
-          return 0.7229568362236023f;
-      else
-        if((val & 0b0001) == 1) // 110
-          return 0.5626170039176941f;
-        else
-          return 0.44070982933044434f;
-    else
-      if((val & 0b0010) == 2) //10
-        if((val & 0b0001) == 1) // 101
-          return 0.33791524171829224f;
-        else
-          return 0.24611230194568634f;
-      else
-        if((val & 0b0001) == 1) // 100
-          return 0.16093020141124725f;
-        else
-          return 0.07958029955625534f;
-
-  else
-    if((val & 0b0100) == 4) // 0
-      if((val & 0b0010) == 2) //01
-        if((val & 0b0001) == 1) // 011
-          return 0.0f;
-        else
-          return -0.09105003625154495f;
-      else
-        if((val & 0b0001) == 1) // 010
-          return -0.18477343022823334f;
-        else
-          return -0.28444138169288635f;
-    else
-      if((val & 0b0010) == 2) //00
-        if((val & 0b0001) == 1) // 001
-          return -0.39491748809814453f;
-        else
-          return -0.5250730514526367f;
-      else
-        if((val & 0b0001) == 1) // 000
-          return -0.6961928009986877f;
-        else
-          return -1.0f;
-
-}
+__device__ __forceinline__ float dDequantizeNF4(unsigned char val) { return nf4_dequantization_lut[val & 0x0F]; }
 
 __device__ unsigned char dQuantizeNF4(float x)
 {
@@ -456,7 +407,6 @@ __global__ void kQuantizeBlockwise(float * code, T * __restrict__ const A, float
       LoadFloat(loadf).Load(&rand[local_rand_idx], rand_vals, BLOCK_SIZE, 0);
     }
 
-    unsigned char packed_4bit = 0;
     switch(DATA_TYPE)
     {
         case General8bit:
@@ -473,18 +423,16 @@ __global__ void kQuantizeBlockwise(float * code, T * __restrict__ const A, float
             #pragma unroll NUM_PER_TH
             for(int j = 0; j < NUM_PER_TH/2; j++)
             {
-              packed_4bit |= dQuantizeFP4(((float)vals[2*j])*local_abs_max) << 4;
-              packed_4bit |= dQuantizeFP4(((float)vals[2*j+1])*local_abs_max);
-              qvals[j] = packed_4bit;
+                qvals[j] = dQuantizeFP4(((float)vals[2 * j]) * local_abs_max) << 4;
+                qvals[j] |= dQuantizeFP4(((float)vals[2 * j + 1]) * local_abs_max);
             }
             break;
         case NF4:
             #pragma unroll NUM_PER_TH
             for(int j = 0; j < NUM_PER_TH/2; j++)
             {
-              packed_4bit |= dQuantizeNF4(((float)vals[2*j])*local_abs_max) << 4;
-              packed_4bit |= dQuantizeNF4(((float)vals[2*j+1])*local_abs_max);
-              qvals[j] = packed_4bit;
+                qvals[j] = dQuantizeNF4(((float)vals[2 * j]) * local_abs_max) << 4;
+                qvals[j] |= dQuantizeNF4(((float)vals[2 * j + 1]) * local_abs_max);
             }
             break;
     }
@@ -546,8 +494,8 @@ __global__ void kDequantizeBlockwise(float *code, unsigned char * A, float * abs
           #pragma unroll NUM_PER_TH
           for(int j = 0; j < NUM_PER_TH; j++)
           {
-            vals[j*2] = dDequantizeFP4Tree(qvals[j] >> 4, local_abs_max);
-            vals[j*2 + 1] = dDequantizeFP4Tree(qvals[j] & 0x0F, local_abs_max);
+                vals[j * 2] = dDequantizeFP4Tree(qvals[j] >> 4) * local_abs_max;
+                vals[j * 2 + 1] = dDequantizeFP4Tree(qvals[j] & 0x0F) * local_abs_max;
           }
           break;
         case NF4:
@@ -2109,7 +2057,11 @@ __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)
 {
@@ -2503,7 +2455,7 @@ template <typename T, int THREADS> __global__ void kgemm_4bit_inference(int M, i
 
   #pragma unroll 16
   for(int i = 0; i < 16; i++)
-    quant_map[i] = nf4_data[i];
+    quant_map[i] = nf4_dequantization_lut[i];
   //__shared__ T quant_map[16*160];
 
   T local_A[2];
@@ -2708,13 +2660,13 @@ 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 +2684,7 @@ 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;
 

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;
         }
 

tests/test_functional.py

@@ -10,7 +10,7 @@ import torch
 
 import bitsandbytes as bnb
 from bitsandbytes import functional as F
-from bitsandbytes.cextension import HIP_ENVIRONMENT, ROCM_GPU_ARCH
+from bitsandbytes.cextension import HIP_ENVIRONMENT
 from tests.helpers import (
     BOOLEAN_TUPLES,
     TRUE_FALSE,
@@ -463,6 +463,7 @@ class TestIGEMMFunctional:
     @pytest.mark.parametrize("hidden_dim", [32, 1024 * 4], ids=id_formatter("hidden_dim"))
     @pytest.mark.parametrize("batch_dim", [2, 16], ids=id_formatter("batch_dim"))
     @pytest.mark.parametrize("transpose", TRUE_FALSE, ids=id_formatter("transpose"))
+    @pytest.mark.skipif(HIP_ENVIRONMENT, reason="this test is not supported on ROCm yet")
     def test_minmax_igemm(self, seq_dim, hidden_dim, batch_dim, transpose):
         def min_max(x):
             maxA = torch.amax(x, dim=2, keepdim=True)
@@ -1408,10 +1409,7 @@ class TestQuantize4BitFunctional:
     @pytest.mark.parametrize("device", get_available_devices())
     @pytest.mark.parametrize("storage_type", ["nf4", "fp4"], ids=["nf4", "fp4"])
     @pytest.mark.parametrize("dtype", [torch.float16, torch.bfloat16, torch.float32], ids=describe_dtype)
-    @pytest.mark.skipif(
-        HIP_ENVIRONMENT and ROCM_GPU_ARCH == "gfx90a",
-        reason="this test is not supported on ROCm with gfx90a architecture yet",
-    )
+    @pytest.mark.skipif(HIP_ENVIRONMENT, reason="this test is not supported on ROCm yet")
     def test_gemv_eye_4bit(self, device, storage_type, dtype):
         if device == "hpu" and not is_supported_on_hpu(storage_type, dtype):
             pytest.skip("This configuration is not supported on HPU.")

tests/test_linear8bitlt.py

@@ -9,6 +9,7 @@ import pytest
 import torch
 
 import bitsandbytes as bnb
+from bitsandbytes.cextension import HIP_ENVIRONMENT
 from bitsandbytes.nn.modules import Linear8bitLt
 from tests.helpers import (
     TRUE_FALSE,
@@ -233,6 +234,7 @@ def test_linear8bit_serialization(linear8bit):
 @pytest.mark.parametrize("fullgraph", TRUE_FALSE, ids=id_formatter("fullgraph"))
 @pytest.mark.parametrize("mode", ["default", "reduce-overhead"], ids=id_formatter("mode"))
 @pytest.mark.skipif(torch.__version__ < (2, 4), reason="Not supported in torch < 2.4")
+@pytest.mark.skipif(HIP_ENVIRONMENT, reason="this test is not supported on ROCm yet")
 def test_linear8bitlt_torch_compile(device, threshold, bias, fullgraph, mode):
     if device == "cuda" and platform.system() == "Windows":
         pytest.skip("Triton is not officially supported on Windows")

tests/test_ops.py

@@ -211,6 +211,7 @@ class Test4bitBlockwiseQuantOps:
     @pytest.mark.parametrize("storage_dtype", [torch.uint8, torch.bfloat16], ids=id_formatter("storage_dtype"))
     @pytest.mark.parametrize("quant_type", ["fp4", "nf4"])
     @pytest.mark.parametrize("blocksize", [64, 128, 256, 512] if not HIP_ENVIRONMENT else [128, 256, 512])
+    @pytest.mark.skipif(HIP_ENVIRONMENT, reason="this test is not supported on ROCm yet")
     def test_gemv_4bit(self, device, dtype, storage_dtype, quant_type, blocksize):
         if device == "hpu" and not is_supported_on_hpu(quant_type, dtype, storage_dtype):
             pytest.skip("This configuration is not supported on HPU.")