[Mesa-dev] [PATCH 5/5] nv50, nvc0: add support for fine derivatives

[Chris Forbes]

I've included an appropriate release notes change including nv50 &
nvc0 in my i965 follow-up series, on the assumption that these two
will land more or less together.

On Thu, Aug 14, 2014 at 11:00 PM, Marek Olšák <maraeo at gmail.com> wrote:
> Are you gonna update the release notes too?
>
> Marek
>
> On Thu, Aug 14, 2014 at 6:52 AM, Ilia Mirkin <imirkin at alum.mit.edu> wrote:
>> The quadop-based method we currently use on all chipsets already
>> provides the fine version of the derivatives.
>>
>> Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
>> ---
>>  docs/GL3.txt                                              | 2 +-
>>  src/gallium/drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp | 4 ++++
>>  src/gallium/drivers/nouveau/nv50/nv50_screen.c            | 2 +-
>>  src/gallium/drivers/nouveau/nvc0/nvc0_screen.c            | 2 +-
>>  4 files changed, 7 insertions(+), 3 deletions(-)
>>
>> diff --git a/docs/GL3.txt b/docs/GL3.txt
>> index 89529fe..0a40e23 100644
>> --- a/docs/GL3.txt
>> +++ b/docs/GL3.txt
>> @@ -189,7 +189,7 @@ GL 4.5, GLSL 4.50:
>>    GL_ARB_clip_control                                  not started
>>    GL_ARB_conditional_render_inverted                   not started
>>    GL_ARB_cull_distance                                 not started
>> -  GL_ARB_derivative_control                            not started
>> +  GL_ARB_derivative_control                            DONE (nv50, nvc0)
>>    GL_ARB_direct_state_access                           not started
>>    GL_ARB_get_texture_sub_image                         started (Brian Paul)
>>    GL_ARB_shader_texture_image_samples                  not started
>> diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp b/src/gallium/drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp
>> index 14b6d68..456efcb 100644
>> --- a/src/gallium/drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp
>> +++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp
>> @@ -531,7 +531,9 @@ static nv50_ir::operation translateOpcode(uint opcode)
>>
>>     NV50_IR_OPCODE_CASE(COS, COS);
>>     NV50_IR_OPCODE_CASE(DDX, DFDX);
>> +   NV50_IR_OPCODE_CASE(DDX_FINE, DFDX);
>>     NV50_IR_OPCODE_CASE(DDY, DFDY);
>> +   NV50_IR_OPCODE_CASE(DDY_FINE, DFDY);
>>     NV50_IR_OPCODE_CASE(KILL, DISCARD);
>>
>>     NV50_IR_OPCODE_CASE(SEQ, SET);
>> @@ -2327,6 +2329,8 @@ Converter::handleInstruction(const struct tgsi_full_instruction *insn)
>>     case TGSI_OPCODE_NOT:
>>     case TGSI_OPCODE_DDX:
>>     case TGSI_OPCODE_DDY:
>> +   case TGSI_OPCODE_DDX_FINE:
>> +   case TGSI_OPCODE_DDY_FINE:
>>        FOR_EACH_DST_ENABLED_CHANNEL(0, c, tgsi)
>>           mkOp1(op, dstTy, dst0[c], fetchSrc(0, c));
>>        break;
>> diff --git a/src/gallium/drivers/nouveau/nv50/nv50_screen.c b/src/gallium/drivers/nouveau/nv50/nv50_screen.c
>> index 34cca3d..8a9a40e 100644
>> --- a/src/gallium/drivers/nouveau/nv50/nv50_screen.c
>> +++ b/src/gallium/drivers/nouveau/nv50/nv50_screen.c
>> @@ -169,6 +169,7 @@ nv50_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
>>     case PIPE_CAP_USER_VERTEX_BUFFERS:
>>     case PIPE_CAP_TEXTURE_MULTISAMPLE:
>>     case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
>> +   case PIPE_CAP_TGSI_FS_FINE_DERIVATIVE:
>>        return 1;
>>     case PIPE_CAP_SEAMLESS_CUBE_MAP:
>>        return 1; /* class_3d >= NVA0_3D_CLASS; */
>> @@ -200,7 +201,6 @@ nv50_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
>>     case PIPE_CAP_TGSI_VS_WINDOW_SPACE_POSITION:
>>     case PIPE_CAP_COMPUTE:
>>     case PIPE_CAP_DRAW_INDIRECT:
>> -   case PIPE_CAP_TGSI_FS_FINE_DERIVATIVE:
>>        return 0;
>>     }
>>
>> diff --git a/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c b/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
>> index 17aee63..c6d9b91 100644
>> --- a/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
>> +++ b/src/gallium/drivers/nouveau/nvc0/nvc0_screen.c
>> @@ -167,6 +167,7 @@ nvc0_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
>>     case PIPE_CAP_SAMPLE_SHADING:
>>     case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
>>     case PIPE_CAP_TEXTURE_GATHER_SM5:
>> +   case PIPE_CAP_TGSI_FS_FINE_DERIVATIVE:
>>        return 1;
>>     case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
>>        return (class_3d >= NVE4_3D_CLASS) ? 1 : 0;
>> @@ -184,7 +185,6 @@ nvc0_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
>>     case PIPE_CAP_TGSI_VS_LAYER_VIEWPORT:
>>     case PIPE_CAP_FAKE_SW_MSAA:
>>     case PIPE_CAP_TGSI_VS_WINDOW_SPACE_POSITION:
>> -   case PIPE_CAP_TGSI_FS_FINE_DERIVATIVE:
>>        return 0;
>>     }
>>
>> --
>> 1.8.5.5
>>
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