diff options
| author | Kenneth Graunke <[email protected]> | 2016-01-25 15:23:24 -0800 |
|---|---|---|
| committer | Kenneth Graunke <[email protected]> | 2017-07-13 19:56:49 -0700 |
| commit | 2a5e4f15efb7be113cbc310bb7d809578153953d (patch) | |
| tree | f7e17f18874f67b479e71f23559712d0e8e97d9b /src/mesa/drivers | |
| parent | 8ec5a4e4a4a32f4de351c5fc2bf0eb615b6eef1b (diff) | |
i965: Require a UBO offset alignment of 32 bytes.
Soon, we're going to start providing UBO data to shaders as push
constants, rather than requiring them to issue pull loads. The
3DSTATE_CONSTANT_* commands require 32 byte aligned pointers.
So, we need to increase this from 16 to 32.
Reviewed-by: Matt Turner <[email protected]>
Diffstat (limited to 'src/mesa/drivers')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_context.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_context.c b/src/mesa/drivers/dri/i965/brw_context.c index d8f187ff7e7..b23e811f305 100644 --- a/src/mesa/drivers/dri/i965/brw_context.c +++ b/src/mesa/drivers/dri/i965/brw_context.c @@ -614,8 +614,11 @@ brw_initialize_context_constants(struct brw_context *brw) * the element in the buffer." * * However, unaligned accesses are slower, so enforce buffer alignment. + * + * In order to push UBO data, 3DSTATE_CONSTANT_XS imposes an additional + * restriction: the start of the buffer needs to be 32B aligned. */ - ctx->Const.UniformBufferOffsetAlignment = 16; + ctx->Const.UniformBufferOffsetAlignment = 32; /* ShaderStorageBufferOffsetAlignment should be a cacheline (64 bytes) so * that we can safely have the CPU and GPU writing the same SSBO on |