Skip to content

Add 2-bit quantization support to WebGPU GatherBlockQuantized operator #29054

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
guschmue merged 1 commit into from
Jun 15, 2026
Merged

Add 2-bit quantization support to WebGPU GatherBlockQuantized operator #29054

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
13 changes: 11 additions & 2 deletions onnxruntime/contrib_ops/webgpu/quantization/gather_block_quantized.cc
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -74,6 +74,10 @@ Status GatherBlockQuantizedProgram::GenerateShaderCode(ShaderHelper& shader) con
<< " let byte_in_word_2b = byte_idx_2b % 4;\n"
<< " let unpacked_bytes_2b = " << unpack << "(u32(packed_word_2b));\n"
<< " var quantized_data = (unpacked_bytes_2b[byte_in_word_2b] >> bit_shift_2b) & 0x3;\n";
if (is_signed_) {
shader.MainFunctionBody()
<< " if((quantized_data & 0x2) != 0) { quantized_data = quantized_data - 4 ;};\n";
}
} else if (is_4bit) {
shader.MainFunctionBody()
<< " let data_index = data_offset % 8;\n"
Expand Down Expand Up @@ -149,8 +153,13 @@ Status GatherBlockQuantizedProgram::GenerateShaderCode(ShaderHelper& shader) con
<< " var zero_point = zero_point_vec[zero_point_index];\n";
}
if (is_signed_) {
shader.MainFunctionBody()
<< " if((zero_point & 0x8) != 0) { zero_point = zero_point - 16 ;};\n";
if (is_2bit) {
shader.MainFunctionBody()
<< " if((zero_point & 0x2) != 0) { zero_point = zero_point - 4 ;};\n";
} else if (is_4bit) {
shader.MainFunctionBody()
<< " if((zero_point & 0x8) != 0) { zero_point = zero_point - 16 ;};\n";
}
}
}
shader.MainFunctionBody()
Expand Down
Loading