freedreno/ir3: fix sin/cos

We seem to need range reduction to get sane results.  Fixes glmark2
jellyfish bench, and a whole bunch of
dEQP-GLES3.functional.shaders.builtin_functions.precision.{sin,cos,tan}.*

v2: squashed in android build fixes from Rob Herring

Signed-off-by: Rob Clark <robclark@freedesktop.org>

src/gallium/drivers/freedreno/.gitignore

@@ -1 +1,2 @@
 ir3_compiler
+ir3_nir_trig.c

src/gallium/drivers/freedreno/Android.gen.mk

@@ -0,0 +1,38 @@
+#
+# Copyright (C) 2016 Linaro, Ltd., Rob Herring <robh@kernel.org>
+#
+# 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 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.
+#
+
+ifeq ($(LOCAL_MODULE_CLASS),)
+LOCAL_MODULE_CLASS := STATIC_LIBRARIES
+endif
+
+ir3_nir_trig_deps := \
+	$(LOCAL_PATH)/ir3/ir3_nir_trig.py \
+	$(MESA_TOP)/src/compiler/nir/nir_algebraic.py
+
+intermediates := $(call local-generated-sources-dir)
+
+$(intermediates)/ir3/ir3_nir_trig.c: $(ir3_nir_trig_deps)
+	@mkdir -p $(dir $@)
+	$(hide) PYTHONPATH=$(MESA_TOP)/src/compiler/nir $(MESA_PYTHON2) $< > $@
+
+LOCAL_GENERATED_SOURCES += $(addprefix $(intermediates)/, \
+	$(ir3_GENERATED_FILES))

src/gallium/drivers/freedreno/Android.mk

@@ -44,5 +44,6 @@ LOCAL_SHARED_LIBRARIES := libdrm libdrm_freedreno
 LOCAL_STATIC_LIBRARIES := libmesa_glsl libmesa_nir
 LOCAL_MODULE := libmesa_pipe_freedreno
 
+include $(LOCAL_PATH)/Android.gen.mk
 include $(GALLIUM_COMMON_MK)
 include $(BUILD_STATIC_LIBRARY)

src/gallium/drivers/freedreno/Makefile.am

@@ -5,9 +5,14 @@ AM_CFLAGS = \
 	-Wno-packed-bitfield-compat \
 	-I$(top_srcdir)/src/gallium/drivers/freedreno/ir3 \
 	-I$(top_builddir)/src/compiler/nir \
+	-I$(top_srcdir)/src/compiler/nir \
 	$(GALLIUM_DRIVER_CFLAGS) \
 	$(FREEDRENO_CFLAGS)
 
+ir3/ir3_nir_trig.c: ir3/ir3_nir_trig.py $(top_srcdir)/src/compiler/nir/nir_algebraic.py
+	$(MKDIR_GEN)
+	$(AM_V_GEN) PYTHONPATH=$(top_srcdir)/src/compiler/nir $(PYTHON2) $(PYTHON_FLAGS) $(srcdir)/ir3/ir3_nir_trig.py > $@ || ($(RM) $@; false)
+
 noinst_LTLIBRARIES = libfreedreno.la
 
 libfreedreno_la_SOURCES = \
@@ -15,7 +20,11 @@ libfreedreno_la_SOURCES = \
 	$(a2xx_SOURCES) \
 	$(a3xx_SOURCES) \
 	$(a4xx_SOURCES) \
-	$(ir3_SOURCES)
+	$(ir3_SOURCES) \
+	$(ir3_GENERATED_FILES)
+
+BUILT_SOURCES := $(ir3_GENERATED_FILES)
+CLEANFILES := $(BUILT_SOURCES)
 
 noinst_PROGRAMS = ir3_compiler
 

src/gallium/drivers/freedreno/Makefile.sources

@@ -136,3 +136,6 @@ ir3_SOURCES := \
 	ir3/ir3_sched.c \
 	ir3/ir3_shader.c \
 	ir3/ir3_shader.h
+
+ir3_GENERATED_FILES := \
+	ir3/ir3_nir_trig.c

src/gallium/drivers/freedreno/ir3/ir3_nir.c

@@ -120,6 +120,11 @@ ir3_optimize_nir(struct ir3_shader *shader, nir_shader *s,
 		if (key->color_two_side) {
 			OPT_V(s, nir_lower_two_sided_color);
 		}
+	} else {
+		/* only want to do this the first time (when key is null)
+		 * and not again on any potential 2nd variant lowering pass:
+		 */
+		OPT_V(s, ir3_nir_apply_trig_workarounds);
 	}
 
 	OPT_V(s, nir_lower_tex, &tex_options);

src/gallium/drivers/freedreno/ir3/ir3_nir.h

@@ -35,6 +35,7 @@
 #include "ir3_shader.h"
 
 bool ir3_nir_lower_if_else(nir_shader *shader);
+bool ir3_nir_apply_trig_workarounds(nir_shader *shader);
 
 struct nir_shader * ir3_tgsi_to_nir(const struct tgsi_token *tokens);
 bool ir3_key_lowers_nir(const struct ir3_shader_key *key);

src/gallium/drivers/freedreno/ir3/ir3_nir_trig.py

@@ -0,0 +1,33 @@
+#! /usr/bin/env python
+#
+# Copyright (C) 2016 Intel Corporation
+#
+# 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.
+
+import nir_algebraic
+
+trig_workarounds = [
+   (('fsin', 'x'), ('fsin', ('fsub', ('fmul', 6.283185, ('ffract', ('fadd', ('fmul', 0.159155, 'x'), 0.5))), 3.141593))),
+   (('fcos', 'x'), ('fcos', ('fsub', ('fmul', 6.283185, ('ffract', ('fadd', ('fmul', 0.159155, 'x'), 0.5))), 3.141593))),
+]
+
+print '#include "ir3_nir.h"'
+print nir_algebraic.AlgebraicPass("ir3_nir_apply_trig_workarounds",
+                                  trig_workarounds).render()