freedreno/ir3: move some helpers

Split out a few helpers from fd3_program so we don't have to duplicate
for fd4_program.

Signed-off-by: Rob Clark <[email protected]>

1 files changed, 58 insertions, 0 deletions

diff --git a/src/gallium/drivers/freedreno/ir3/ir3_shader.h b/src/gallium/drivers/freedreno/ir3/ir3_shader.h
index a26dab2e8e1..3d51603fcfb 100644
--- a/src/gallium/drivers/freedreno/ir3/ir3_shader.h
+++ b/src/gallium/drivers/freedreno/ir3/ir3_shader.h
@@ -214,4 +214,62 @@ void ir3_shader_destroy(struct ir3_shader *shader);
 struct ir3_shader_variant * ir3_shader_variant(struct ir3_shader *shader,
 		struct ir3_shader_key key);
 
+/*
+ * Helper/util:
+ */
+
+static inline int
+ir3_find_output(const struct ir3_shader_variant *so, ir3_semantic semantic)
+{
+	int j;
+
+	for (j = 0; j < so->outputs_count; j++)
+		if (so->outputs[j].semantic == semantic)
+			return j;
+
+	/* it seems optional to have a OUT.BCOLOR[n] for each OUT.COLOR[n]
+	 * in the vertex shader.. but the fragment shader doesn't know this
+	 * so  it will always have both IN.COLOR[n] and IN.BCOLOR[n].  So
+	 * at link time if there is no matching OUT.BCOLOR[n], we must map
+	 * OUT.COLOR[n] to IN.BCOLOR[n].  And visa versa if there is only
+	 * a OUT.BCOLOR[n] but no matching OUT.COLOR[n]
+	 */
+	if (sem2name(semantic) == TGSI_SEMANTIC_BCOLOR) {
+		unsigned idx = sem2idx(semantic);
+		semantic = ir3_semantic_name(TGSI_SEMANTIC_COLOR, idx);
+	} else if (sem2name(semantic) == TGSI_SEMANTIC_COLOR) {
+		unsigned idx = sem2idx(semantic);
+		semantic = ir3_semantic_name(TGSI_SEMANTIC_BCOLOR, idx);
+	} else {
+		return 0;
+	}
+
+	for (j = 0; j < so->outputs_count; j++)
+		if (so->outputs[j].semantic == semantic)
+			return j;
+
+	debug_assert(0);
+
+	return 0;
+}
+
+static inline int
+ir3_next_varying(const struct ir3_shader_variant *so, int i)
+{
+	while (++i < so->inputs_count)
+		if (so->inputs[i].compmask && so->inputs[i].bary)
+			break;
+	return i;
+}
+
+static inline uint32_t
+ir3_find_output_regid(const struct ir3_shader_variant *so, ir3_semantic semantic)
+{
+	int j;
+	for (j = 0; j < so->outputs_count; j++)
+		if (so->outputs[j].semantic == semantic)
+			return so->outputs[j].regid;
+	return regid(63, 0);
+}
+
 #endif /* IR3_SHADER_H_ */