gallium: add a cap for supporting 4-offset TG4 opcodes

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>

src/gallium/docs/source/screen.rst

@@ -200,6 +200,8 @@ The integer capabilities:
 * ``PIPE_CAP_SAMPLE_SHADING``: Whether there is support for per-sample
   shading. The context->set_min_samples function will be expected to be
   implemented.
+* ``PIPE_CAP_TEXTURE_GATHER_OFFSETS``: Whether the ``TG4`` instruction can
+  accept 4 offsets.
 
 
 .. _pipe_capf:

src/gallium/drivers/freedreno/freedreno_screen.c

@@ -209,6 +209,7 @@ fd_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
 	case PIPE_CAP_FAKE_SW_MSAA:
 	case PIPE_CAP_TEXTURE_QUERY_LOD:
 	case PIPE_CAP_SAMPLE_SHADING:
+	case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
 		return 0;
 
 	/* Stream output. */

src/gallium/drivers/i915/i915_screen.c

@@ -221,6 +221,7 @@ i915_get_param(struct pipe_screen *screen, enum pipe_cap cap)
    case PIPE_CAP_FAKE_SW_MSAA:
    case PIPE_CAP_TEXTURE_QUERY_LOD:
    case PIPE_CAP_SAMPLE_SHADING:
+   case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
       return 0;
 
    case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:

src/gallium/drivers/ilo/ilo_screen.c

@@ -440,6 +440,7 @@ ilo_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_FAKE_SW_MSAA:
    case PIPE_CAP_TEXTURE_QUERY_LOD:
    case PIPE_CAP_SAMPLE_SHADING:
+   case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
       return 0;
 
    default:

src/gallium/drivers/llvmpipe/lp_screen.c

@@ -242,6 +242,7 @@ llvmpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT:
    case PIPE_CAP_TEXTURE_QUERY_LOD:
    case PIPE_CAP_SAMPLE_SHADING:
+   case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
       return 0;
    case PIPE_CAP_FAKE_SW_MSAA:
 	return 1;

src/gallium/drivers/nouveau/nv30/nv30_screen.c

@@ -136,6 +136,7 @@ nv30_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_FAKE_SW_MSAA:
    case PIPE_CAP_TEXTURE_QUERY_LOD:
    case PIPE_CAP_SAMPLE_SHADING:
+   case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
       return 0;
    case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
    case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:

src/gallium/drivers/nouveau/nv50/nv50_screen.c

@@ -198,6 +198,7 @@ nv50_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
    case PIPE_CAP_TGSI_VS_LAYER:
    case PIPE_CAP_TEXTURE_GATHER_SM5:
    case PIPE_CAP_FAKE_SW_MSAA:
+   case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
       return 0;
    case PIPE_CAP_MAX_VIEWPORTS:
       return NV50_MAX_VIEWPORTS;

src/gallium/drivers/nouveau/nvc0/nvc0_screen.c

@@ -186,6 +186,7 @@ nvc0_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
       return 1;
    case PIPE_CAP_TEXTURE_QUERY_LOD:
    case PIPE_CAP_SAMPLE_SHADING:
+   case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
       return 1;
    case PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS:
       return 4;

src/gallium/drivers/r300/r300_screen.c

@@ -174,6 +174,7 @@ static int r300_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
         case PIPE_CAP_TEXTURE_QUERY_LOD:
         case PIPE_CAP_FAKE_SW_MSAA:
         case PIPE_CAP_SAMPLE_SHADING:
+        case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
             return 0;
 
         /* SWTCL-only features. */

src/gallium/drivers/r600/r600_pipe.c

@@ -315,6 +315,7 @@ static int r600_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
 	case PIPE_CAP_TEXTURE_GATHER_SM5:
 	case PIPE_CAP_TEXTURE_QUERY_LOD:
 	case PIPE_CAP_SAMPLE_SHADING:
+	case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
 		return 0;
 
 	/* Stream output. */

src/gallium/drivers/radeonsi/si_pipe.c

@@ -244,6 +244,7 @@ static int si_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
 	case PIPE_CAP_FAKE_SW_MSAA:
 	case PIPE_CAP_TEXTURE_QUERY_LOD:
 	case PIPE_CAP_SAMPLE_SHADING:
+	case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
 		return 0;
 
 	case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:

src/gallium/drivers/softpipe/sp_screen.c

@@ -190,6 +190,7 @@ softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT:
    case PIPE_CAP_TEXTURE_QUERY_LOD:
    case PIPE_CAP_SAMPLE_SHADING:
+   case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
       return 0;
    case PIPE_CAP_FAKE_SW_MSAA:
       return 1;

src/gallium/drivers/svga/svga_screen.c

@@ -274,6 +274,7 @@ svga_get_param(struct pipe_screen *screen, enum pipe_cap param)
    case PIPE_CAP_FAKE_SW_MSAA:
    case PIPE_CAP_TEXTURE_QUERY_LOD:
    case PIPE_CAP_SAMPLE_SHADING:
+   case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
       return 0;
    case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:
       return 64;

src/gallium/include/pipe/p_defines.h

@@ -557,6 +557,7 @@ enum pipe_cap {
    PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET = 95,
    PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET = 96,
    PIPE_CAP_SAMPLE_SHADING = 97,
+   PIPE_CAP_TEXTURE_GATHER_OFFSETS = 98,
 };
 
 #define PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_NV50 (1 << 0)