On Mon, Feb 13, 2017 at 4:42 PM, Nicolai Hähnle <nhaeh...@gmail.com> wrote: > On 11.02.2017 17:30, Marek Olšák wrote: >> >> From: Marek Olšák <marek.ol...@amd.com> >> >> so that we can disable u_vbuf for GL core profiles. >> >> SI-CIK fail piglit/draw-vertices, while VI doesn't. > > > Can you clarify, is this a regression? > > If anything, I'd expect a potential regression on VI here, if you have a > three-element GL_UNSIGNED_BYTE attribute whose last entry lines up precisely > with the end of the buffer.
I suspect that SI-CIK force dword formats (8_8_8_8 and 16_16) to be dword-aligned, while VI doesn't. This is configurable via SH_MEM_CONFIG on CIK-VI, and not configurable on SI. The amdgpu KMD sets SH_MEM_CONFIG.ALIGNMENT_MODE = UNALIGNED on CIK & VI. The radeon KMD sets SH_MEM_CONFIG.ALIGNMENT_MODE = DWORD on CIK. So I think we can at least enable unaligned loads on amdgpu+CIK now, and radeon+CIK only if we fix SH_MEM_CONFIG. Marek _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev
