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path: root/src/glsl/lower_packed_varyings.cpp
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* mesa: add packed_varyings list to gl_shaderTapani Pälli2015-09-251-4/+12
| | | | | | | | | This is required to store information about packed varyings, currently these variables get lost and cannot be retrieved later in sensible way for program interface queries. List will be utilized by next patch. Signed-off-by: Tapani Pälli <tapani.palli@intel.com> Reviewed-by: Marta Lofstedt <marta.lofstedt@intel.com>
* glsl: add the patch in/out qualifier (v2)Fabian Bieler2015-07-231-0/+1
| | | | | | v2: Dropped some unrelated reordering in glsl_parser.yy as Ken suggested. Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
* glsl: fix packing support for arrays of doublesTimothy Arceri2015-04-281-2/+2
| | | | | | | Broke in commit f00c5f85b82efe9535b18dbf97c4591fb28aeae6 when adding support for multidimensional arrays Reviewed-by: Ilia Mirkin <imirkin at alum.mit.edu>
* glsl: support packing of arrays of arraysTimothy Arceri2015-04-271-8/+2
| | | | Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
* glsl: add double support for packing varyingsIlia Mirkin2015-02-241-27/+90
| | | | | | | | | Doubles are always packed, but a single double will never cross a slot boundary -- single slots can still be wasted in some situations. Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu> Reviewed-by: Dave Airlie <airlied@redhat.com> Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
* glsl: Never put ir_var_temporary variables in the symbol tableIan Romanick2014-09-301-0/+1
| | | | | | | | | | | Later patches will give every ir_var_temporary the same name in release builds. Adding a bunch of variables named "compiler_temp" to the symbol table can only cause problems. No change Valgrind massif results for a trimmed apitrace of dota2. Signed-off-by: Ian Romanick <ian.d.romanick@intel.com> Reviewed-by: Matt Turner <mattst88@gmail.com>
* glsl: Make it possible to ignore built-ins when matching signatures.Kenneth Graunke2014-08-041-1/+1
| | | | | | | | | | | | | | | | | | Historically, we've implemented the rules for overriding built-in functions by creating multiple ir_functions and relying on the symbol table to hide the one containing built-in functions. That works, but has a few drawbacks, so the next patch will change it. Instead, we'll have a single ir_function for a particular name, which will contain both built-in and user-defined signatures. Passing an extra parameter to matching_signature makes it easy to ignore built-ins when they're supposed to be hidden. I didn't add the parameter to exact_matching_signature since it wasn't necessary. Signed-off-by: Kenneth Graunke <kenneth@whitecape.org> Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
* glsl: Use typed foreach_in_list instead of foreach_list.Matt Turner2014-07-011-4/+3
| | | | Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
* glsl: Modify ir_emit_vertex to have a stream.Iago Toral Quiroga2014-06-301-2/+2
| | | | | | | This will be necessary to implement EmitStreamVertex(). EmitVertex() will produce an ir_emit_vertex with the default stream 0. Reviewed-by: Chris Forbes <chrisf@ijw.co.nz>
* linker: Make lower_packed_varyings work with explicit locationsIan Romanick2014-05-021-1/+6
| | | | | | | | Don't do anything with variables that have explicitly assigned locations. This is also how built-in varyings are handled. Signed-off-by: Ian Romanick <ian.d.romanick@intel.com> Reviewed-by: Eric Anholt <eric@anholt.net>
* glsl: Remove varying "base" parametersIan Romanick2014-05-021-22/+10
| | | | | | | | | | In February 2013 Paul unified the values used for shader stage outputs and shader stage inputs. See commits 8a076c5f0^..eed6baf76. Since that time, the location_base parameters are always VARYING_SLOT_VAR0. Instead of passing that around, just hard code it. Signed-off-by: Ian Romanick <ian.d.romanick@intel.com> Reviewed-by: Eric Anholt <eric@anholt.net>
* glsl: Fix typoIan Romanick2014-03-121-2/+2
| | | | | | | Remove extra "any" and re-word-wrap the comment. Signed-off-by: Ian Romanick <ian.d.romanick@intel.com> Reviewed-by: Eric Anholt <eric@anholt.net>
* mesa: Use gl_shader::Stage instead of gl_shader::Type where possible.Paul Berry2014-01-081-1/+1
| | | | | | | | | | | | | | | | | | | | | This reduces confusion since gl_shader::Type is sometimes GL_SHADER_PROGRAM_MESA but is more frequently GL_SHADER_{VERTEX,GEOMETRY,FRAGMENT}. It also has the advantage that when switching on gl_shader::Stage, the compiler will alert if one of the possible enum types is unhandled. Finally, many functions in src/glsl (especially those dealing with linking) already use gl_shader_stage to represent pipeline stages; using gl_shader::Stage in those functions avoids the need for a conversion. Note: in the process I changed _mesa_write_shader_to_file() so that if it encounters an unexpected shader stage, it will use a file suffix of "????" rather than "geom". Reviewed-by: Brian Paul <brianp@vmware.com> v2: Split from patch "mesa: Store gl_shader_stage enum in gl_shader objects." Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
* glsl: move variables in to ir_variable::data, part IITapani Pälli2013-12-121-4/+4
| | | | | | | | | | | | | This patch moves following bitfields and variables to the data structure: explicit_location, explicit_index, explicit_binding, has_initializer, is_unmatched_generic_inout, location_frac, from_named_ifc_block_nonarray, from_named_ifc_block_array, depth_layout, location, index, binding, max_array_access, atomic Signed-off-by: Tapani Pälli <tapani.palli@intel.com> Reviewed-by: Paul Berry <stereotype441@gmail.com>
* glsl: move variables in to ir_variable::data, part ITapani Pälli2013-12-121-5/+5
| | | | | | | | | | This patch moves following bitfields in to the data structure: used, assigned, how_declared, mode, interpolation, origin_upper_left, pixel_center_integer Signed-off-by: Tapani Pälli <tapani.palli@intel.com> Reviewed-by: Paul Berry <stereotype441@gmail.com>
* glsl: introduce data section to ir_variableTapani Pälli2013-12-121-2/+2
| | | | | | | | Data section helps serialization and cloning of a ir_variable. This patch includes the helper bits used for read only ir_variables. Signed-off-by: Tapani Pälli <tapani.palli@intel.com> Reviewed-by: Paul Berry <stereotype441@gmail.com>
* glsl: Add ir support for `sample` qualifier; adjust compiler and linkerChris Forbes2013-12-071-0/+1
| | | | | Signed-off-by: Chris Forbes <chrisf@ijw.co.nz> Reviewed-by: Francisco Jerez <currojerez@riseup.net>
* glsl: Don't generate misleading debug names when packing gs inputs.Paul Berry2013-11-041-4/+3
| | | | | | | | | | | | | | | | | | | | | | | | Previously, when packing geometry shader input varyings like this: in float foo[3]; in float bar[3]; lower_packed_varyings would declare a packed varying like this: (declare (shader_in flat) (array ivec4 3) packed:foo[0],bar[0]) That's confusing, since the packed varying acutally stores all three values of foo and all three values of bar. This patch causes it to generate the more sensible declaration: (declare (shader_in flat) (array ivec4 3) packed:foo,bar) Note that there should be no functional change for users of geometry shaders, since the packed name is only used for generating debug output. But this should reduce confusion when using INTEL_DEBUG=gs. Reviewed-by: Eric Anholt <eric@anholt.net>
* glsl: Hide many classes local to individual .cpp files in anon namespaces.Eric Anholt2013-09-231-0/+4
| | | | | | | | This gives the compiler the chance to inline and not export class symbols even in the absence of LTO. Saves about 60kb on disk. Reviewed-by: Kenneth Graunke <kenneth@whitecape.org> Reviewed-by: Ian Romanick <ian.d.romanick@.intel.com>
* glsl: Pass _mesa_glsl_parse_state into matching_signature and such.Kenneth Graunke2013-09-091-1/+1
| | | | | | | | | | | | | | | | | | | | | | | During compilation, we'll use this to determine built-in availability. The plan is to have a single shader containing every built-in in every version of the language, but filter out the ones that aren't actually available to the shader being compiled. At link time, we don't actually need this filtering capability: we've already imported prototypes for every built-in that the shader actually calls, and they're flagged as is_builtin(). The linker doesn't import any additional prototypes, so it won't pull in any unavailable built-ins. When resolving prototypes to function definitions, the linker ensures the values of is_builtin() match, which means that a shader can't trick the linker into importing the body of an unavailable built-in by defining a suspiciously similar prototype. In other words, during linking, we can just pass in NULL. It will work out fine. Signed-off-by: Kenneth Graunke <kenneth@whitecape.org> Reviewed-by: Matt Turner <mattst88@gmail.com> Reviewed-by: Paul Berry <stereotype441@gmail.com>
* glsl: Properly pack GS output varyingsPaul Berry2013-08-011-2/+57
| | | | | | | | | | | | | | In geometry shaders, outputs are consumed at the time of a call to EmitVertex() (as opposed to all other shader types, where outputs are consumed when the shader exits). Therefore, when packing geometry shader output varyings using lower_packed_varyings, we need to do the packing at the time of the EmitVertex() call. This patch accomplishes that by adding a new visitor class, lower_packed_varyings_gs_splicer, which is responsible for splicing the varying packing code into place wherever EmitVertex() is found. Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
* glsl: Modify varying packing to use a temporary exec_list.Paul Berry2013-08-011-10/+18
| | | | | | | | | | | | | | This patch modifies lower_packed_varyings to store the packing code it generates in a temporary exec_list, and then splice that list into the shader's main() function when it's done. This paves the way for supporting geometry shader outputs, where we'll have to splice a clone of the packing code before every call to EmitVertex(). As a side benefit, varying packing code is now emitted in the same order for inputs and outputs; this should make debug output a little easier to read. Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
* glsl/linker: Properly pack GS input varyings.Paul Berry2013-08-011-28/+184
| | | | | | | | Since geometry shader inputs are arrays (where the array index indicates which vertex is being examined), varying packing needs to treat them differently. Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
* glsl: Document lower_packed_varyings' "flat" requirement with an assert.Paul Berry2013-04-091-0/+8
| | | | | | | | | | | | | To minimize the variety of type conversions that lower_packed_varyings needs to perform, it assumes that integral varyings are always qualified as "flat". link_varyings.cpp takes care of ensuring that this is the case (even in the circumstances where GLSL doesn't require it). This patch documents the assumption with an assertion, for ease in future debugging. Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
* Replace gl_vert_result enum with gl_varying_slot.Paul Berry2013-03-151-1/+1
| | | | | | | | | | | This patch makes the following search-and-replace changes: gl_vert_result -> gl_varying_slot VERT_RESULT_* -> VARYING_SLOT_* Reviewed-by: Kenneth Graunke <kenneth@whitecape.org> Reviewed-by: Eric Anholt <eric@anholt.net> Tested-by: Brian Paul <brianp@vmware.com>
* glsl: Update lower_packed_varyings to handle varying structs.Paul Berry2013-01-241-4/+18
| | | | | | | | | | | | | | | This patch adds code to lower_packed_varyings to handle varyings of type struct. Varying structs are currently packed in the most naive possible way (in declaration order, with no gaps), so there is a potential loss of runtime efficiency. In a later patch it would be nice to replace this with a "flattening" approach (wherein a varying struct is flattened to individual varyings corresponding to each of its structure elements), so that the linker can align each structure element independently. However, that would require a significantly more complex implementation. Reviewed-by: Jordan Justen <jordan.l.justen@intel.com> Reviewed-by: Eric Anholt <eric@anholt.net>
* glsl: Eliminate ambiguity between function ins/outs and shader ins/outsPaul Berry2013-01-241-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch replaces the three ir_variable_mode enums: - ir_var_in - ir_var_out - ir_var_inout with the following five: - ir_var_shader_in - ir_var_shader_out - ir_var_function_in - ir_var_function_out - ir_var_function_inout This eliminates a frustrating ambiguity: it used to be impossible to tell whether an ir_var_{in,out} variable was a shader in/out or a function in/out without seeing where the variable was declared in the IR. This complicated some optimization and lowering passes, and would have become a problem for implementing varying structs. In the lisp-style serialization of GLSL IR to strings performed by ir_print_visitor.cpp and ir_reader.cpp, I've retained the names "in", "out", and "inout" for function parameters, to avoid introducing code churn to the src/glsl/builtins/ir/ directory. Note: a couple of comments in the code seemed to indicate that we were planning for a possible future in which geometry shaders could have shader-scope inout variables. Our GLSL grammar rejects shader-scope inout variables, and I've been unable to find any evidence in the GLSL standards documents (or extensions) that this will ever be allowed, so I've eliminated these comments. Reviewed-by: Carl Worth <cworth@cworth.org> Reviewed-by: Jordan Justen <jordan.l.justen@intel.com> Reviewed-by: Eric Anholt <eric@anholt.net>
* glsl: Pack flat "varyings" of mixed types together.Paul Berry2013-01-081-8/+87
| | | | | | | | | | | | | | | | | | | | | This patch enhances the varying packing code so that flat varyings of uint, int, and float types can be packed together. We accomplish this in lower_packed_varyings.cpp by making the type of all flat varyings ivec4, and then using information-preserving type conversions (e.g. ir_unop_bitcast_f2i) to convert all other types to ints. The varying_matches::compute_packing_class() function is updated to reflect the fact that varying packing no longer needs to segregate varyings of different base types. Fixes piglit test varying-packing-mixed-types. Reviewed-by: Kenneth Graunke <kenneth@whitecape.org> v2: Split lower_packed_varyings_visitor::bitwise_assign into pack/unpack variants.
* glsl: Add a lowering pass for packing varyings.Paul Berry2012-12-141-0/+364
This lowering pass generates GLSL code that manually packs varyings into vec4 slots, for the benefit of back-ends that don't support packed varyings natively. No functional change--the lowering pass is not yet used. Reviewed-by: Eric Anholt <eric@anholt.net> v2: Don't use ir_hierarchical_visitor--just loop over instructions directly. Also, make the names of the packed varyings include the names of the original varyings that were packed into them.
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