spirv: Generate spirv_info.c

The old table based spirv_*_to_string functions would return NULL for
any values "inside" the table that didn't have entries.  The tables also
needed to be updated by hand each time a new spirv.h was imported.
Generate the file instead.

v2: Make this script work more like src/mesa/main/format_fallback.py.
Suggested by Jason.  Remove SCons supports.  Suggested by Jason and
Emil.  Put all the build work in Makefile.nir.am in lieu of adding a new
Makefile.spirv.am.  Suggested by Emil.  Add support for Android builds
based on code provided by Emil.

Signed-off-by: Ian Romanick <[email protected]>
Suggested-by: Jason Ekstrand <[email protected]>
Reviewed-by: Jason Ekstrand <[email protected]>
Reviewed-by: Emil Velikov <[email protected]>

1 files changed, 82 insertions, 0 deletions

diff --git a/src/compiler/spirv/spirv_info_c.py b/src/compiler/spirv/spirv_info_c.py
new file mode 100644
index 00000000000..c5e11dfc837
--- /dev/null
+++ b/src/compiler/spirv/spirv_info_c.py
@@ -0,0 +1,82 @@
+COPYRIGHT = """\
+/*
+ * Copyright (C) 2017 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 argparse
+import json
+from sys import stdout
+from mako.template import Template
+
+def collect_data(spirv, kind):
+    for x in spirv["operand_kinds"]:
+        if x["kind"] == kind:
+            operands = x
+            break
+
+    # There are some duplicate values in some of the tables (thanks guys!), so
+    # filter them out.
+    last_value = -1
+    values = []
+    for x in operands["enumerants"]:
+        if x["value"] != last_value:
+            last_value = x["value"]
+            values.append(x["enumerant"])
+
+    return (kind, values)
+
+def parse_args():
+    p = argparse.ArgumentParser()
+    p.add_argument("json")
+    p.add_argument("out")
+    return p.parse_args()
+
+TEMPLATE  = Template(COPYRIGHT + """\
+#include "spirv_info.h"
+% for kind,values in info:
+
+const char *
+spirv_${kind.lower()}_to_string(Spv${kind} v)
+{
+   switch (v) {
+    % for name in values:
+   case Spv${kind}${name}: return "Spv${kind}${name}";
+    % endfor
+   case Spv${kind}Max: break; /* silence warnings about unhandled enums. */
+   }
+
+   return "unknown";
+}
+% endfor
+""")
+
+if __name__ == "__main__":
+    pargs = parse_args()
+
+    spirv_info = json.JSONDecoder().decode(open(pargs.json, "r").read())
+
+    capabilities = collect_data(spirv_info, "Capability")
+    decorations = collect_data(spirv_info, "Decoration")
+
+    with open(pargs.out, 'w') as f:
+        f.write(TEMPLATE.render(info=[capabilities, decorations]))