diff options
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_context.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_context.c b/src/mesa/drivers/dri/i965/brw_context.c index d157f059704..3380582b3fa 100644 --- a/src/mesa/drivers/dri/i965/brw_context.c +++ b/src/mesa/drivers/dri/i965/brw_context.c @@ -675,6 +675,22 @@ brw_initialize_context_constants(struct brw_context *brw) /* OES_primitive_bounding_box */ ctx->Const.NoPrimitiveBoundingBoxOutput = true; + + /* TODO: We should be able to use STD430 packing by default on all hardware + * but some piglit tests [1] currently fail on SNB when this is enabled. + * The problem is the messages we're using for doing uniform pulls + * in the vec4 back-end on SNB is the OWORD block load instruction, which + * takes its offset in units of OWORDS (16 bytes). On IVB+, we use the + * sampler which doesn't have these restrictions. + * + * In the scalar back-end, we use the sampler for dynamic uniform loads and + * pull an entire cache line at a time for constant offset loads both of + * which support almost any alignment. + * + * [1] glsl-1.40/uniform_buffer/vs-float-array-variable-index.shader_test + */ + if (brw->gen >= 7) + ctx->Const.UseSTD430AsDefaultPacking = true; } static void |