diff options
author | Robert Ellison <papillo@tungstengraphics.com> | 2008-10-03 18:00:43 -0600 |
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committer | Robert Ellison <papillo@tungstengraphics.com> | 2008-10-03 18:05:14 -0600 |
commit | afaa53040bd01ca86762e7d7b1a5a65810767921 (patch) | |
tree | d17e24553e5863e688de582f9a3043b1128acac5 /src/gallium/drivers/cell/spu/spu_main.h | |
parent | 22eb067c8863cbd9078f136706effd5df3375dbb (diff) |
CELL: changes to generate SPU code for stenciling
This set of code changes are for stencil code generation
support. Both one-sided and two-sided stenciling are supported.
In addition to the raw code generation changes, these changes had
to be made elsewhere in the system:
- Added new "register set" feature to the SPE assembly generation.
A "register set" is a way to allocate multiple registers and free
them all at the same time, delegating register allocation management
to the spe_function unit. It's quite useful in complex register
allocation schemes (like stenciling).
- Added and improved SPE macro calculations.
These are operations between registers and unsigned integer
immediates. In many cases, the calculation can be performed
with a single instruction; the macros will generate the
single instruction if possible, or generate a register load
and register-to-register operation if not. These macro
functions are: spe_load_uint() (which has new ways to
load a value in a single instruction), spe_and_uint(),
spe_xor_uint(), spe_compare_equal_uint(), and spe_compare_greater_uint().
- Added facing to fragment generation. While rendering, the rasterizer
needs to be able to determine front- and back-facing fragments, in order
to correctly apply two-sided stencil. That requires these changes:
- Added front_winding field to the cell_command_render block, so that
the state tracker could communicate to the rasterizer what it
considered to be the front-facing direction.
- Added fragment facing as an input to the fragment function.
- Calculated facing is passed during emit_quad().
Diffstat (limited to 'src/gallium/drivers/cell/spu/spu_main.h')
-rw-r--r-- | src/gallium/drivers/cell/spu/spu_main.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/gallium/drivers/cell/spu/spu_main.h b/src/gallium/drivers/cell/spu/spu_main.h index 29a305232e..1cd577c23c 100644 --- a/src/gallium/drivers/cell/spu/spu_main.h +++ b/src/gallium/drivers/cell/spu/spu_main.h @@ -73,7 +73,8 @@ typedef void (*spu_fragment_ops_func)(uint x, uint y, vector float fragGreen, vector float fragBlue, vector float fragAlpha, - vector unsigned int mask); + vector unsigned int mask, + uint facing); /** Function for running fragment program */ typedef void (*spu_fragment_program_func)(vector float *inputs, |