glsl: Create file to contain software fp64 functions

The following patches will add implementations of various
double-precision operations to this file.

Reviewed-by: Kenneth Graunke <[email protected]>

5 files changed, 79 insertions, 2 deletions

diff --git a/src/compiler/Android.glsl.gen.mk b/src/compiler/Android.glsl.gen.mk
index cdd786aa87c..e31eb6f101f 100644
--- a/src/compiler/Android.glsl.gen.mk
+++ b/src/compiler/Android.glsl.gen.mk
@@ -103,3 +103,7 @@ $(intermediates)/glsl/ir_expression_operation_constant.h: $(LOCAL_PATH)/glsl/ir_
 $(intermediates)/glsl/ir_expression_operation_strings.h: $(LOCAL_PATH)/glsl/ir_expression_operation.py
 	@mkdir -p $(dir $@)
 	$(hide) $(MESA_PYTHON2) $< strings > $@
+
+$(intermediates)/compiler/glsl/float64_glsl.h: $(LOCAL_PATH)/glsl/xxd.py
+	@mkdir -p $(dir $@)
+	$(hide) $(MESA_PYTHON2) $< $(MESA_TOP)/src/compiler/glsl/float64.glsl $@ -n float64_source > $@
diff --git a/src/compiler/Makefile.glsl.am b/src/compiler/Makefile.glsl.am
index 9d88d1f66ee..af2294c789e 100644
--- a/src/compiler/Makefile.glsl.am
+++ b/src/compiler/Makefile.glsl.am
@@ -226,6 +226,10 @@ glsl/ir_expression_operation_strings.h: glsl/ir_expression_operation.py
 	$(MKDIR_GEN)
 	$(PYTHON_GEN) $(srcdir)/glsl/ir_expression_operation.py strings > $@ || ($(RM) $@; false)
 
+glsl/float64_glsl.h: glsl/xxd.py glsl/float64.glsl
+	$(MKDIR_GEN)
+	$(PYTHON_GEN) $(srcdir)/glsl/xxd.py $(srcdir)/glsl/float64.glsl $@ -n float64_source || ($(RM) $@; false)
+
 # Only the parsers (specifically the header files generated at the same time)
 # need to be in BUILT_SOURCES. Though if we list the parser headers YACC is
 # called for the .c/.cpp file and the .h files. By listing the .c/.cpp files
@@ -233,6 +237,7 @@ glsl/ir_expression_operation_strings.h: glsl/ir_expression_operation.py
 # will be created at the appropriate times according to standard automake
 # dependency rules.
 BUILT_SOURCES +=					\
+	glsl/float64_glsl.h				\
 	glsl/glsl_parser.cpp				\
 	glsl/glsl_lexer.cpp				\
 	glsl/ir_expression_operation.h			\
@@ -241,6 +246,7 @@ BUILT_SOURCES +=					\
 	glsl/glcpp/glcpp-parse.c			\
 	glsl/glcpp/glcpp-lex.c
 CLEANFILES +=						\
+	glsl/float64_glsl.h				\
 	glsl/glcpp/glcpp-parse.h			\
 	glsl/glsl_parser.h				\
 	glsl/glsl_parser.cpp				\
diff --git a/src/compiler/Makefile.sources b/src/compiler/Makefile.sources
index ef47bdb33bf..ec62c2fbb42 100644
--- a/src/compiler/Makefile.sources
+++ b/src/compiler/Makefile.sources
@@ -178,7 +178,8 @@ LIBGLSL_GENERATED_FILES = \
 	glsl/ir_expression_operation_strings.h \
 	glsl/glsl_lexer.cpp \
 	glsl/glsl_parser.cpp \
-	glsl/glsl_parser.h
+	glsl/glsl_parser.h \
+	compiler/glsl/float64_glsl.h
 
 # libglcpp
 
diff --git a/src/compiler/glsl/float64.glsl b/src/compiler/glsl/float64.glsl
new file mode 100644
index 00000000000..a299269677a
--- /dev/null
+++ b/src/compiler/glsl/float64.glsl
@@ -0,0 +1,58 @@
+/*
+ * The implementations contained in this file are heavily based on the
+ * implementations found in the Berkeley SoftFloat library. As such, they are
+ * licensed under the same 3-clause BSD license:
+ *
+ * License for Berkeley SoftFloat Release 3e
+ *
+ * John R. Hauser
+ * 2018 January 20
+ *
+ * The following applies to the whole of SoftFloat Release 3e as well as to
+ * each source file individually.
+ *
+ * Copyright 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 The Regents of the
+ * University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *  1. Redistributions of source code must retain the above copyright notice,
+ *     this list of conditions, and the following disclaimer.
+ *
+ *  2. Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions, and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *
+ *  3. Neither the name of the University nor the names of its contributors
+ *     may be used to endorse or promote products derived from this software
+ *     without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS", AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#version 430
+#extension GL_ARB_gpu_shader_int64 : enable
+#extension GL_ARB_shader_bit_encoding : enable
+
+#pragma warning(off)
+
+/* Software IEEE floating-point rounding mode.
+ * GLSL spec section "4.7.1 Range and Precision":
+ * The rounding mode cannot be set and is undefined.
+ * But here, we are able to define the rounding mode at the compilation time.
+ */
+#define FLOAT_ROUND_NEAREST_EVEN    0
+#define FLOAT_ROUND_TO_ZERO         1
+#define FLOAT_ROUND_DOWN            2
+#define FLOAT_ROUND_UP              3
+#define FLOAT_ROUNDING_MODE         FLOAT_ROUND_NEAREST_EVEN
diff --git a/src/compiler/glsl/meson.build b/src/compiler/glsl/meson.build
index 71b4c42e4d7..8096f2d048e 100644
--- a/src/compiler/glsl/meson.build
+++ b/src/compiler/glsl/meson.build
@@ -53,6 +53,13 @@ ir_expression_operation_strings_h = custom_target(
   capture : true,
 )
 
+float64_glsl_h = custom_target(
+  'float64_glsl.h',
+  input : ['xxd.py', 'float64.glsl'],
+  output : 'float64_glsl.h',
+  command : [prog_python, '@INPUT@', '@OUTPUT@', '-n', 'float64_source'],
+)
+
 files_libglsl = files(
   'ast.h',
   'ast_array_index.cpp',
@@ -213,7 +220,8 @@ files_libglsl_standalone = files(
 libglsl = static_library(
   'glsl',
   [files_libglsl, glsl_parser, glsl_lexer_cpp, ir_expression_operation_h,
-   ir_expression_operation_strings_h, ir_expression_operation_constant_h],
+   ir_expression_operation_strings_h, ir_expression_operation_constant_h,
+   float64_glsl_h],
   c_args : [c_vis_args, c_msvc_compat_args, no_override_init_args],
   cpp_args : [cpp_vis_args, cpp_msvc_compat_args],
   link_with : libglcpp,