forked from OSchip/llvm-project
92 lines
3.7 KiB
C
92 lines
3.7 KiB
C
/******************************************************************************/
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/* */
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/* The LLVM Compiler Infrastructure */
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/* */
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/* This file is dual licensed under the MIT and the University of Illinois */
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/* Open Source License. See LICENSE.TXT for details. */
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/* */
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/******************************************************************************/
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/* */
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/* This file defines GPUJIT. */
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/* */
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/******************************************************************************/
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#ifndef GPUJIT_H_
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#define GPUJIT_H_
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/*
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* The following demostrates how we can use the GPURuntime library to
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* execute a GPU kernel.
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*
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* char KernelString[] = "\n\
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* .version 1.4\n\
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* .target sm_10, map_f64_to_f32\n\
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* .entry _Z8myKernelPi (\n\
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* .param .u64 __cudaparm__Z8myKernelPi_data)\n\
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* {\n\
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* .reg .u16 %rh<4>;\n\
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* .reg .u32 %r<5>;\n\
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* .reg .u64 %rd<6>;\n\
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* cvt.u32.u16 %r1, %tid.x;\n\
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* mov.u16 %rh1, %ctaid.x;\n\
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* mov.u16 %rh2, %ntid.x;\n\
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* mul.wide.u16 %r2, %rh1, %rh2;\n\
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* add.u32 %r3, %r1, %r2;\n\
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* ld.param.u64 %rd1, [__cudaparm__Z8myKernelPi_data];\n\
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* cvt.s64.s32 %rd2, %r3;\n\
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* mul.wide.s32 %rd3, %r3, 4;\n\
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* add.u64 %rd4, %rd1, %rd3;\n\
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* st.global.s32 [%rd4+0], %r3;\n\
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* exit;\n\
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* }\n\
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* ";
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*
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* const char *Entry = "_Z8myKernelPi";
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*
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* int main() {
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* PollyGPUModule *Module;
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* PollyGPUFunction *Kernel;
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* PollyGPUContext *Context;
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* PollyGPUDevicePtr *DevArray;
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* int *HostData;
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* int MemSize;
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* int BlockWidth = 16;
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* int BlockHeight = 16;
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* int GridWidth = 8;
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* int GridHeight = 8;
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*
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* MemSize = 256*64*sizeof(int);
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* Context = polly_initContext();
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* DevArray = polly_allocateMemoryForDevice(MemSize);
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* polly_getPTXModule(KernelString, &Module);
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* polly_getPTXKernelEntry(Entry, Module, &Kernel);
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* polly_setKernelParameters(Kernel, BlockWidth, BlockHeight, DevData);
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* polly_launchKernel(Kernel, GridWidth, GridHeight);
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* polly_copyFromDeviceToHost(HostData, DevData, MemSize);
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* polly_freeDeviceMemory(DevArray);
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* polly_freeContext(Context);
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* }
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*
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*/
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typedef struct PollyGPUContextT PollyGPUContext;
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typedef struct PollyGPUModuleT PollyGPUModule;
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typedef struct PollyGPUFunctionT PollyGPUFunction;
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typedef struct PollyGPUDevicePtrT PollyGPUDevicePtr;
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PollyGPUContext *polly_initContext();
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void polly_getPTXModule(void *PTXBuffer, PollyGPUModule **Module);
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void polly_getPTXKernelEntry(const char *KernelName, PollyGPUModule *Module,
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PollyGPUFunction **Kernel);
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void polly_copyFromHostToDevice(PollyGPUDevicePtr *DevData, void *HostData,
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int MemSize);
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void polly_copyFromDeviceToHost(void *HostData, PollyGPUDevicePtr *DevData,
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int MemSize);
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void polly_setKernelParameters(PollyGPUFunction *Kernel, int BlockWidth,
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int BlockHeight, PollyGPUDevicePtr *DevData);
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void polly_launchKernel(PollyGPUFunction *Kernel, int GridWidth,
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int GridHeight);
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void polly_freeDeviceMemory(PollyGPUDevicePtr *Allocation);
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void polly_freeContext(PollyGPUContext *Context);
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#endif /* GPUJIT_H_ */
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