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ggml-cuda: Repost of 21896: Blackwell native NVFP4 support (#22196)

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This commit is contained in:
Michael Wand
2026-04-29 06:47:42 +08:00
committed by GitHub
parent 7b8443ac78
commit fc2b0053ff
8 changed files with 318 additions and 130 deletions
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ggml/src/ggml-cuda/mma.cuh
+22 -12
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@@ -1015,25 +1015,35 @@ namespace ggml_cuda_mma {
#endif // AMD_MFMA_AVAILABLE
}
static __device__ __forceinline__ void mma_block_scaled(tile<16, 8, float> & D,
const tile<16, 8, int> & A,
const tile<8, 8, int> & B,
uint32_t a_scale,
uint32_t b_scale) {
template <ggml_type type>
static __device__ __forceinline__ void mma_block_scaled_fp4(tile<16, 8, float> & D,
const tile<16, 8, int> & A,
const tile<8, 8, int> & B,
uint32_t a_scale,
uint32_t b_scale) {
#ifdef BLACKWELL_MMA_AVAILABLE
const int * Axi = (const int *) A.x;
const int * Bxi = (const int *) B.x;
float * Dxi = (float *) D.x;
asm volatile(
"mma.sync.aligned.kind::mxf4.block_scale.scale_vec::2X.m16n8k64.row.col.f32.e2m1.e2m1.f32.ue8m0 "
"{%0, %1, %2, %3}, {%4, %5, %6, %7}, {%8, %9}, {%0, %1, %2, %3}, "
"%10, {0, 0}, %11, {0, 0};"
: "+f"(Dxi[0]), "+f"(Dxi[1]), "+f"(Dxi[2]), "+f"(Dxi[3])
: "r"(Axi[0]), "r"(Axi[1]), "r"(Axi[2]), "r"(Axi[3]), "r"(Bxi[0]), "r"(Bxi[1]), "r"(a_scale), "r"(b_scale));
if constexpr (type == GGML_TYPE_MXFP4) {
asm volatile(
"mma.sync.aligned.kind::mxf4.block_scale.scale_vec::2X.m16n8k64.row.col.f32.e2m1.e2m1.f32.ue8m0 "
"{%0, %1, %2, %3}, {%4, %5, %6, %7}, {%8, %9}, {%0, %1, %2, %3}, "
"%10, {0, 0}, %11, {0, 0};"
: "+f"(Dxi[0]), "+f"(Dxi[1]), "+f"(Dxi[2]), "+f"(Dxi[3])
: "r"(Axi[0]), "r"(Axi[1]), "r"(Axi[2]), "r"(Axi[3]), "r"(Bxi[0]), "r"(Bxi[1]), "r"(a_scale), "r"(b_scale));
} else {
asm volatile(
"mma.sync.aligned.kind::mxf4nvf4.block_scale.scale_vec::4X.m16n8k64.row.col.f32.e2m1.e2m1.f32.ue4m3 "
"{%0, %1, %2, %3}, {%4, %5, %6, %7}, {%8, %9}, {%0, %1, %2, %3}, "
"%10, {0, 0}, %11, {0, 0};"
: "+f"(Dxi[0]), "+f"(Dxi[1]), "+f"(Dxi[2]), "+f"(Dxi[3])
: "r"(Axi[0]), "r"(Axi[1]), "r"(Axi[2]), "r"(Axi[3]), "r"(Bxi[0]), "r"(Bxi[1]), "r"(a_scale), "r"(b_scale));
}
#else
GGML_UNUSED_VARS(D, A, B, a_scale, b_scale);
#endif // BLACKWELL_MMA_AVAILABLE
#endif // BLACKWELL_MMA_AVAILABLE
}
static __device__ __forceinline__ void mma(