compiler: rename SYSTEM_VALUE_VARYING_COORD

And add corresponding enums for different sorts of varying
interpolation.

Signed-off-by: Rob Clark <robdclark@chromium.org>

src/compiler/shader_enums.c

@@ -247,7 +247,10 @@ gl_system_value_name(gl_system_value sysval)
      ENUM(SYSTEM_VALUE_DEVICE_INDEX),
      ENUM(SYSTEM_VALUE_VIEW_INDEX),
      ENUM(SYSTEM_VALUE_VERTEX_CNT),
-     ENUM(SYSTEM_VALUE_VARYING_COORD),
+     ENUM(SYSTEM_VALUE_BARYCENTRIC_PIXEL),
+     ENUM(SYSTEM_VALUE_BARYCENTRIC_SAMPLE),
+     ENUM(SYSTEM_VALUE_BARYCENTRIC_CENTROID),
+     ENUM(SYSTEM_VALUE_BARYCENTRIC_SIZE),
    };
    STATIC_ASSERT(ARRAY_SIZE(names) == SYSTEM_VALUE_MAX);
    return NAME(sysval);

src/compiler/shader_enums.h

@@ -621,10 +621,16 @@ typedef enum
    SYSTEM_VALUE_VERTEX_CNT,
 
    /**
-    * Driver internal varying-coord, used for varying-fetch instructions.
+    * Driver internal varying-coords, used for varying-fetch instructions.
     * Not externally visible.
+    *
+    * The _SIZE value is "primitive size", used to scale i/j in primitive
+    * space to pixel space.
     */
-   SYSTEM_VALUE_VARYING_COORD,
+   SYSTEM_VALUE_BARYCENTRIC_PIXEL,
+   SYSTEM_VALUE_BARYCENTRIC_SAMPLE,
+   SYSTEM_VALUE_BARYCENTRIC_CENTROID,
+   SYSTEM_VALUE_BARYCENTRIC_SIZE,
 
    SYSTEM_VALUE_MAX             /**< Number of values */
 } gl_system_value;

src/freedreno/ir3/ir3_compiler_nir.c

@@ -2577,7 +2577,7 @@ emit_instructions(struct ir3_context *ctx)
 	 * because sysvals need to be appended after varyings:
 	 */
 	if (vcoord) {
-		add_sysval_input_compmask(ctx, SYSTEM_VALUE_VARYING_COORD,
+		add_sysval_input_compmask(ctx, SYSTEM_VALUE_BARYCENTRIC_PIXEL,
 				0x3, vcoord);
 	}
 

src/freedreno/ir3/ir3_shader.c

@@ -408,7 +408,7 @@ ir3_shader_disasm(struct ir3_shader_variant *so, uint32_t *bin, FILE *out)
 		break;
 	case MESA_SHADER_FRAGMENT:
 		dump_reg(out, "pos (bary)",
-			ir3_find_sysval_regid(so, SYSTEM_VALUE_VARYING_COORD));
+			ir3_find_sysval_regid(so, SYSTEM_VALUE_BARYCENTRIC_PIXEL));
 		dump_output(out, so, FRAG_RESULT_DEPTH, "posz");
 		if (so->color0_mrt) {
 			dump_output(out, so, FRAG_RESULT_COLOR, "color");

src/freedreno/vulkan/tu_pipeline.c

@@ -690,7 +690,7 @@ tu6_emit_fs_system_values(struct tu_cs *cs,
                                           ? (fragcoord_xy_regid + 2)
                                           : fragcoord_xy_regid;
    const uint32_t varyingcoord_regid =
-      ir3_find_sysval_regid(fs, SYSTEM_VALUE_VARYING_COORD);
+      ir3_find_sysval_regid(fs, SYSTEM_VALUE_BARYCENTRIC_PIXEL);
 
    tu_cs_emit_pkt4(cs, REG_A6XX_HLSQ_CONTROL_1_REG, 5);
    tu_cs_emit(cs, 0x7);

src/gallium/drivers/freedreno/a3xx/fd3_program.c

@@ -211,7 +211,7 @@ fd3_program_emit(struct fd_ringbuffer *ring, struct fd3_emit *emit,
 	face_regid      = ir3_find_sysval_regid(fp, SYSTEM_VALUE_FRONT_FACE);
 	coord_regid     = ir3_find_sysval_regid(fp, SYSTEM_VALUE_FRAG_COORD);
 	zwcoord_regid   = (coord_regid == regid(63,0)) ? regid(63,0) : (coord_regid + 2);
-	vcoord_regid    = ir3_find_sysval_regid(fp, SYSTEM_VALUE_VARYING_COORD);
+	vcoord_regid    = ir3_find_sysval_regid(fp, SYSTEM_VALUE_BARYCENTRIC_PIXEL);
 
 	/* adjust regids for alpha output formats. there is no alpha render
 	 * format, so it's just treated like red

src/gallium/drivers/freedreno/a4xx/fd4_program.c

@@ -245,7 +245,7 @@ fd4_program_emit(struct fd_ringbuffer *ring, struct fd4_emit *emit,
 	face_regid      = ir3_find_sysval_regid(s[FS].v, SYSTEM_VALUE_FRONT_FACE);
 	coord_regid     = ir3_find_sysval_regid(s[FS].v, SYSTEM_VALUE_FRAG_COORD);
 	zwcoord_regid   = (coord_regid == regid(63,0)) ? regid(63,0) : (coord_regid + 2);
-	vcoord_regid    = ir3_find_sysval_regid(s[FS].v, SYSTEM_VALUE_VARYING_COORD);
+	vcoord_regid    = ir3_find_sysval_regid(s[FS].v, SYSTEM_VALUE_BARYCENTRIC_PIXEL);
 
 	/* we could probably divide this up into things that need to be
 	 * emitted if frag-prog is dirty vs if vert-prog is dirty..

src/gallium/drivers/freedreno/a5xx/fd5_program.c

@@ -357,7 +357,7 @@ fd5_program_emit(struct fd_context *ctx, struct fd_ringbuffer *ring,
 	face_regid      = ir3_find_sysval_regid(s[FS].v, SYSTEM_VALUE_FRONT_FACE);
 	coord_regid     = ir3_find_sysval_regid(s[FS].v, SYSTEM_VALUE_FRAG_COORD);
 	zwcoord_regid   = (coord_regid == regid(63,0)) ? regid(63,0) : (coord_regid + 2);
-	vcoord_regid    = ir3_find_sysval_regid(s[FS].v, SYSTEM_VALUE_VARYING_COORD);
+	vcoord_regid    = ir3_find_sysval_regid(s[FS].v, SYSTEM_VALUE_BARYCENTRIC_PIXEL);
 
 	/* we could probably divide this up into things that need to be
 	 * emitted if frag-prog is dirty vs if vert-prog is dirty..

src/gallium/drivers/freedreno/a6xx/fd6_program.c

@@ -337,7 +337,7 @@ setup_stateobj(struct fd_ringbuffer *ring,
 	face_regid      = ir3_find_sysval_regid(s[FS].v, SYSTEM_VALUE_FRONT_FACE);
 	coord_regid     = ir3_find_sysval_regid(s[FS].v, SYSTEM_VALUE_FRAG_COORD);
 	zwcoord_regid   = next_regid(coord_regid, 2);
-	vcoord_regid    = ir3_find_sysval_regid(s[FS].v, SYSTEM_VALUE_VARYING_COORD);
+	vcoord_regid    = ir3_find_sysval_regid(s[FS].v, SYSTEM_VALUE_BARYCENTRIC_PIXEL);
 	posz_regid      = ir3_find_output_regid(s[FS].v, FRAG_RESULT_DEPTH);
 
 	/* we could probably divide this up into things that need to be

src/mesa/state_tracker/st_glsl_to_tgsi.cpp

@@ -5827,7 +5827,10 @@ _mesa_sysval_to_semantic(unsigned sysval)
    case SYSTEM_VALUE_LOCAL_INVOCATION_INDEX:
    case SYSTEM_VALUE_GLOBAL_INVOCATION_ID:
    case SYSTEM_VALUE_VERTEX_CNT:
-   case SYSTEM_VALUE_VARYING_COORD:
+   case SYSTEM_VALUE_BARYCENTRIC_PIXEL:
+   case SYSTEM_VALUE_BARYCENTRIC_SAMPLE:
+   case SYSTEM_VALUE_BARYCENTRIC_CENTROID:
+   case SYSTEM_VALUE_BARYCENTRIC_SIZE:
    default:
       assert(!"Unexpected SYSTEM_VALUE_ enum");
       return TGSI_SEMANTIC_COUNT;