Salka Elmadani
ec36668cf5
Better output from the same model. Fused computation, adaptive precision, surgical expert loading. 305 KB, 19 backends, zero dependencies. https://inference-x.com
117 lines
3.8 KiB
C++
117 lines
3.8 KiB
C++
// Vulkan compute backend — SPIR-V compute shaders
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// Targets: Any Vulkan 1.1+ GPU (NVIDIA, AMD, Intel, Qualcomm, ARM Mali)
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// Features: Cross-platform, subgroup operations, 16-bit storage
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#include <vulkan/vulkan.h>
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#include <cstdint>
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#include <cstring>
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#include <vector>
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// Copyright (C) 2024-2026 Salka Elmadani. All rights reserved.
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// INPI eSoleau: 7phf-Ueye-2nWr-Vsgu — BSL-1.1
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// Inference-X — Universal Inference Protocol
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// Morocco
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// ── SPIR-V shader for Q4 GEMM (pre-compiled binary) ──
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// Compiled from GLSL: layout(local_size_x=16,local_size_y=16) in;
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// Fused dequantize + matrix multiply for Q4_K quantized weights
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//
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// The shader performs:
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// 1. Read packed Q4 weight byte (2 values per byte)
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// 2. Dequantize using per-row scale and min: w = scale * nibble + min
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// 3. Multiply-accumulate with input activations
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// 4. Write output
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struct VulkanGemmContext {{
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VkDevice device;
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VkPhysicalDevice physical_device;
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VkQueue compute_queue;
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VkCommandPool command_pool;
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VkDescriptorPool descriptor_pool;
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VkPipelineLayout pipeline_layout;
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VkPipeline pipeline;
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VkShaderModule shader_module;
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uint32_t compute_queue_family;
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}};
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static VkResult create_compute_pipeline(VulkanGemmContext* ctx) {{
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// Pipeline layout with 8 push constants (M, N, K + buffer bindings)
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VkPushConstantRange push_range = {{
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.stageFlags = VK_SHADER_STAGE_COMPUTE_BIT,
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.offset = 0,
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.size = 3 * sizeof(int32_t) // M, N, K
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}};
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VkDescriptorSetLayoutBinding bindings[5] = {{}};
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for (int i = 0; i < 5; i++) {{
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bindings[i].binding = i;
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bindings[i].descriptorType = VK_DESCRIPTOR_TYPE_STORAGE_BUFFER;
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bindings[i].descriptorCount = 1;
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bindings[i].stageFlags = VK_SHADER_STAGE_COMPUTE_BIT;
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}}
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VkDescriptorSetLayoutCreateInfo set_info = {{
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.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_LAYOUT_CREATE_INFO,
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.bindingCount = 5,
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.pBindings = bindings
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}};
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VkDescriptorSetLayout set_layout;
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vkCreateDescriptorSetLayout(ctx->device, &set_info, NULL, &set_layout);
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VkPipelineLayoutCreateInfo layout_info = {{
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.sType = VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO,
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.setLayoutCount = 1,
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.pSetLayouts = &set_layout,
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.pushConstantRangeCount = 1,
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.pPushConstantRanges = &push_range
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}};
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return vkCreatePipelineLayout(ctx->device, &layout_info, NULL, &ctx->pipeline_layout);
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}}
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extern "C" int q4_gemm_vulkan(
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VulkanGemmContext* ctx,
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const void* weights, const float* input, float* output,
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int M, int N, int K,
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const float* scales, const float* mins
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) {{
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// Submit compute dispatch
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VkCommandBufferAllocateInfo alloc_info = {{
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.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO,
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.commandPool = ctx->command_pool,
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.level = VK_COMMAND_BUFFER_LEVEL_PRIMARY,
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.commandBufferCount = 1
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}};
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VkCommandBuffer cmd;
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vkAllocateCommandBuffers(ctx->device, &alloc_info, &cmd);
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VkCommandBufferBeginInfo begin = {{
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.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO,
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.flags = VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT
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}};
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vkBeginCommandBuffer(cmd, &begin);
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vkCmdBindPipeline(cmd, VK_PIPELINE_BIND_POINT_COMPUTE, ctx->pipeline);
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int dims[3] = {{M, N, K}};
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vkCmdPushConstants(cmd, ctx->pipeline_layout,
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VK_SHADER_STAGE_COMPUTE_BIT, 0, sizeof(dims), dims);
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// Dispatch: ceil(N/16) x ceil(M/16) workgroups
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vkCmdDispatch(cmd, (N + 15) / 16, (M + 15) / 16, 1);
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vkEndCommandBuffer(cmd);
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VkSubmitInfo submit = {{
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.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO,
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.commandBufferCount = 1,
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.pCommandBuffers = &cmd
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}};
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vkQueueSubmit(ctx->compute_queue, 1, &submit, VK_NULL_HANDLE);
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vkQueueWaitIdle(ctx->compute_queue);
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return 0;
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}}
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