OpenCL kernels compilation error with AMDGPU-PRO #50269

New Issue

Jacopo Chen · 2016-12-17T20:05:11+01:00

Jacopo Chen commented

2016-12-17 20:05:11 +01:00

System Information
Arch Linux (kernel version 4.8.13-1)
AMD Radeon R5 M255 (Iceland)

Blender Version
Broken: 2.78a e8299c8

Short description of error
Trying to render with Cycles on GPU results in an OpenCL kernel compilation error, easily fixable.

Exact steps for others to reproduce the error
Start Blender from the terminal.
Go to File > User Preferences > System and make sure Compute Device is set to OpenCL. You should have package opencl-amd installed to make it recognize the card.
Starting with any .blend file, change the render engine to Cycles Render and the compute device to GPU Compute.
Start the render.
After a while, the OpenCL build fails and this appears in the terminal:

  OpenCL kernel build output:
  "/usr/share/blender/2.78/scripts/addons/cycles/kernel/kernels/opencl/../../kernel_projection.h", line 238: error: 
            expression must have pointer-to-struct-or-union type
	            float altitude = fabsf(safe_asinf(D->z));

This can be fixed by accessing file /usr/share/blender/2.78/scripts/addons/cycles/kernel/kernel_projection.h as root and changing line 238 from:

  float altitude = fabsf(safe_asinf(D->z));

to:

  float zz = (*D).z;
  float altitude = fabsf(safe_asinf(zz));

**System Information** Arch Linux (kernel version 4.8.13-1) AMD Radeon R5 M255 (Iceland) **Blender Version** Broken: 2.78a e8299c8 **Short description of error** Trying to render with Cycles on GPU results in an OpenCL kernel compilation error, easily fixable. **Exact steps for others to reproduce the error** Start Blender from the terminal. Go to File > User Preferences > System and make sure Compute Device is set to OpenCL. You should have package opencl-amd installed to make it recognize the card. Starting with any .blend file, change the render engine to Cycles Render and the compute device to GPU Compute. Start the render. After a while, the OpenCL build fails and this appears in the terminal: ``` OpenCL kernel build output: "/usr/share/blender/2.78/scripts/addons/cycles/kernel/kernels/opencl/../../kernel_projection.h", line 238: error: expression must have pointer-to-struct-or-union type float altitude = fabsf(safe_asinf(D->z)); ``` This can be fixed by accessing file /usr/share/blender/2.78/scripts/addons/cycles/kernel/kernel_projection.h as root and changing line 238 from: ``` float altitude = fabsf(safe_asinf(D->z)); ``` to: ``` float zz = (*D).z; float altitude = fabsf(safe_asinf(zz));

Jacopo Chen commented

2016-12-17 20:05:11 +01:00

Changed status to: 'Open'