svga: implement support for GL_ARB_texture_query_lod

Just translate the TGSI LODQ intruction to VGPU10 LOD instruction.
All (4) Piglit GL_ARB_texture_query_lod tests pass.

Reviewed-by: Charmaine Lee <charmainel@vmware.com>
Reviewed-by: Neha Bhende <bhenden@vmware.com>

diff --git a/src/gallium/drivers/svga/svga_screen.c b/src/gallium/drivers/svga/svga_screen.c
index a38e062f77683727e9d2b3c6389506362939876b..c0f898d9d8f4cb1ddbb0029988b52d5985f7d970 100644 (file)
--- a/src/gallium/drivers/svga/svga_screen.c
+++ b/src/gallium/drivers/svga/svga_screen.c
@@ -347,6 +347,7 @@ svga_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_INDEP_BLEND_FUNC:
    case PIPE_CAP_SAMPLE_SHADING:
    case PIPE_CAP_FORCE_PERSAMPLE_INTERP:
+   case PIPE_CAP_TEXTURE_QUERY_LOD:
       return sws->have_sm4_1;
 
    case PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS:
@@ -367,7 +368,6 @@ svga_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_TGSI_VS_LAYER_VIEWPORT:
    case PIPE_CAP_TEXTURE_GATHER_SM5:
    case PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT:
-   case PIPE_CAP_TEXTURE_QUERY_LOD:
    case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
    case PIPE_CAP_TGSI_VS_WINDOW_SPACE_POSITION:
    case PIPE_CAP_DRAW_INDIRECT:

diff --git a/src/gallium/drivers/svga/svga_tgsi_vgpu10.c b/src/gallium/drivers/svga/svga_tgsi_vgpu10.c
index b87ac9065843f024083128a71148e40953af8876..2dc870ffef0d0250ed5bb949a6e4b90307d73344 100644 (file)
--- a/src/gallium/drivers/svga/svga_tgsi_vgpu10.c
+++ b/src/gallium/drivers/svga/svga_tgsi_vgpu10.c
@@ -4253,6 +4253,30 @@ emit_lit(struct svga_shader_emitter_v10 *emit,
 }
 
 
+/**
+ * Emit Level Of Detail Query (LODQ) instruction.
+ */
+static boolean
+emit_lodq(struct svga_shader_emitter_v10 *emit,
+          const struct tgsi_full_instruction *inst)
+{
+   const uint unit = inst->Src[1].Register.Index;
+
+   assert(emit->version >= 41);
+
+   /* LOD dst, coord, resource, sampler */
+   begin_emit_instruction(emit);
+   emit_opcode(emit, VGPU10_OPCODE_LOD, FALSE);
+   emit_dst_register(emit, &inst->Dst[0]);
+   emit_src_register(emit, &inst->Src[0]); /* coord */
+   emit_resource_register(emit, unit);
+   emit_sampler_register(emit, unit);
+   end_emit_instruction(emit);
+
+   return TRUE;
+}
+
+
 /**
  * Emit code for TGSI_OPCODE_LOG instruction.
  */
@@ -5862,6 +5886,8 @@ emit_vgpu10_instruction(struct svga_shader_emitter_v10 *emit,
       return emit_lg2(emit, inst);
    case TGSI_OPCODE_LIT:
       return emit_lit(emit, inst);
+   case TGSI_OPCODE_LODQ:
+      return emit_lodq(emit, inst);
    case TGSI_OPCODE_LOG:
       return emit_log(emit, inst);
    case TGSI_OPCODE_LRP: