Mesa (master): nv50,nvc0: add support for fine derivatives

[Ilia Mirkin]

Module: Mesa
Branch: master
Commit: f08d7b8fe1e6689beb750d7654af4db228aef392
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=f08d7b8fe1e6689beb750d7654af4db228aef392

Author: Ilia Mirkin <imirkin at alum.mit.edu>
Date:   Thu Aug 14 00:17:17 2014 -0400

nv50,nvc0: add support for fine derivatives

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 +-
 docs/relnotes/10.3.html                                   |    1 +
 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 +-
 5 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/docs/GL3.txt b/docs/GL3.txt
index 298f8d7..e1fda45 100644
--- a/docs/GL3.txt
+++ b/docs/GL3.txt
@@ -188,7 +188,7 @@ 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/docs/relnotes/10.3.html b/docs/relnotes/10.3.html
index 66745b8..3e469a1 100644
--- a/docs/relnotes/10.3.html
+++ b/docs/relnotes/10.3.html
@@ -47,6 +47,7 @@ Note: some of the new features are only available with certain drivers.
 <li>GL_ARB_ES3_compatibility on nv50, nvc0, r600, radeonsi, softpipe, llvmpipe</li>
 <li>GL_ARB_clear_texture on i965</li>
 <li>GL_ARB_compressed_texture_pixel_storage on all drivers</li>
+<li>GL_ARB_derivative_control on nv50, nvc0</li>
 <li>GL_ARB_draw_indirect on nvc0, radeonsi</li>
 <li>GL_ARB_explicit_uniform_location (all drivers that support GLSL)</li>
 <li>GL_ARB_fragment_layer_viewport on nv50, nvc0, llvmpipe, r600</li>
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;
    }