freedreno: a2xx: NIR backend

This patch replaces the a2xx TGSI compiler with a NIR compiler.

It also adds several new features:
-gl_FrontFacing, gl_FragCoord, gl_PointCoord, gl_PointSize
-control flow (including loops)
-texture related features (LOD/bias, cubemaps)
-filling scalar ALU slot when possible

Signed-off-by: Jonathan Marek <jonathan@marek.ca>

1 files changed, 94 insertions, 0 deletions

diff --git a/src/gallium/drivers/freedreno/a2xx/ir2.h b/src/gallium/drivers/freedreno/a2xx/ir2.h
new file mode 100644
index 00000000000..f381fdfff16
--- /dev/null
+++ b/src/gallium/drivers/freedreno/a2xx/ir2.h
@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2018 Jonathan Marek <jonathan@marek.ca>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Authors:
+ *    Jonathan Marek <jonathan@marek.ca>
+ */
+
+#ifndef IR2_H_
+#define IR2_H_
+
+#include "compiler/nir/nir.h"
+
+struct ir2_fetch_info {
+	/* dword offset of the fetch instruction */
+	uint16_t offset;
+	union {
+		/* swizzle to merge with tgsi swizzle */
+		struct {
+			uint16_t dst_swiz;
+		} vtx;
+		/* sampler id to patch const_idx */
+		struct {
+			uint16_t samp_id;
+			uint8_t src_swiz;
+		} tex;
+	};
+};
+
+struct ir2_shader_info {
+	/* compiler shader */
+	uint32_t *dwords;
+
+	/* size of the compiled shader in dwords */
+	uint16_t sizedwords;
+
+	/* highest GPR # used by shader */
+	int8_t max_reg;
+
+	/* offset in dwords of first MEMORY export CF (for a20x hw binning) */
+	int16_t mem_export_ptr;
+
+	/* fetch instruction info for patching */
+	uint16_t num_fetch_instrs;
+	struct ir2_fetch_info fetch_info[64];
+};
+
+struct ir2_frag_linkage {
+	unsigned inputs_count;
+	struct {
+		uint8_t slot;
+		uint8_t ncomp;
+	} inputs[16];
+
+	/* driver_location of fragcoord.zw, -1 if not used */
+	int fragcoord;
+};
+
+struct ir2_shader_variant {
+	struct ir2_shader_info info;
+	struct ir2_frag_linkage f;
+};
+
+struct fd2_shader_stateobj;
+struct tgsi_token;
+
+void ir2_compile(struct fd2_shader_stateobj *so, unsigned variant,
+		struct fd2_shader_stateobj *fp);
+
+struct nir_shader *ir2_tgsi_to_nir(const struct tgsi_token *tokens);
+
+const nir_shader_compiler_options *ir2_get_compiler_options(void);
+
+int ir2_optimize_nir(nir_shader *s, bool lower);
+
+#endif							/* IR2_H_ */