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Merge pull request #601 from huggingface/repair_bf16_f16_cast

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Repairing cast bf16/f16
This commit is contained in:
Nicolas Patry
2023-08-26 12:34:41 +02:00
committed by GitHub
parent 71518caeee d4e75d5825
commit b23b347b35
1 changed files with 25 additions and 2 deletions
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27
candle-kernels/src/cast.cu
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@ -24,19 +24,42 @@ extern "C" __global__ void FN_NAME( \
} \
} \
#define CAST_BF_OP(SRC_TYPENAME, DST_TYPENAME, FN_NAME) \
extern "C" __global__ void FN_NAME( \
const size_t numel, \
const size_t num_dims, \
const size_t *info, \
const SRC_TYPENAME *inp, \
DST_TYPENAME *out \
) { \
const size_t *dims = info; \
const size_t *strides = info + num_dims; \
if (is_contiguous(num_dims, dims, strides)) { \
for (unsigned int i = blockIdx.x * blockDim.x + threadIdx.x; i < numel; i += blockDim.x * gridDim.x) { \
out[i] = (DST_TYPENAME) (float) inp[i]; \
} \
} \
else { \
for (unsigned int i = blockIdx.x * blockDim.x + threadIdx.x; i < numel; i += blockDim.x * gridDim.x) { \
unsigned strided_i = get_strided_index(i, num_dims, dims, strides); \
out[i] = (DST_TYPENAME) (float) inp[strided_i]; \
} \
} \
} \
#if __CUDA_ARCH__ >= 800
CAST_OP(__nv_bfloat16, __nv_bfloat16, cast_bf16_bf16)
// CAST_OP(__nv_bfloat16, uint8_t, cast_bf16_u8)
CAST_OP(__nv_bfloat16, uint32_t, cast_bf16_u32)
// CAST_OP(__nv_bfloat16, __half, cast_bf16_f16)
CAST_OP(__nv_bfloat16, float, cast_bf16_f32)
CAST_OP(__nv_bfloat16, double, cast_bf16_f64)
CAST_OP(uint8_t, __nv_bfloat16, cast_u8_bf16)
CAST_OP(uint32_t, __nv_bfloat16, cast_u32_bf16)
// CAST_OP(__half, __nv_bfloat16, cast_f16_bf16)
CAST_OP(float, __nv_bfloat16, cast_f32_bf16)
CAST_OP(double, __nv_bfloat16, cast_f64_bf16)
CAST_BF_OP(__nv_bfloat16, __half, cast_bf16_f16)
CAST_BF_OP(__half, __nv_bfloat16, cast_f16_bf16)
#endif
#if __CUDA_ARCH__ >= 530