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util: Change a codegenned switch statement to a nice little table.

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This saves us 13 to 35kb on release drivers in my builds.

Acked-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5826>
This commit is contained in:
Eric Anholt
2020-07-01 13:00:16 -07:00
parent 4064a6cd20
commit 9fd0f455af
3 changed files with 83 additions and 67 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/util/format/u_format_table.py
+72 -54
View File
@@ -78,6 +78,39 @@ swizzle_map = {
SWIZZLE_NONE: "PIPE_SWIZZLE_NONE",
}
def has_access(format):
# We don't generate code for YUV formats, and many of the new ones lack
# pack/unpack functions for softpipe/llvmpipe.
noaccess_formats = [
'yv12',
'yv16',
'iyuv',
'nv12',
'nv16',
'nv21',
'p010',
'p012',
'p016',
'xyuv',
'ayuv',
'r8g8_r8b8_unorm',
'g8r8_b8r8_unorm',
'g8r8_g8b8_unorm',
'y8_u8_v8_422_unorm',
'y8_u8v8_422_unorm',
'y8_u8_v8_444_unorm',
'y16_u16_v16_420_unorm',
'y16_u16_v16_422_unorm',
'y16_u16v16_422_unorm',
'y16_u16_v16_444_unorm',
]
if format.short_name() in noaccess_formats:
return False
if format.layout in ('astc', 'atc', 'fxt1'):
return False
if format.layout == 'etc' and format.short_name() != 'etc1_rgb8':
return False
return True
def write_format_table(formats):
print('/* This file is autogenerated by u_format_table.py from u_format.csv. Do not edit directly. */')
@@ -128,26 +161,19 @@ def write_format_table(formats):
print("const struct util_format_%sdescription *" % type)
print("util_format_%sdescription(enum pipe_format format)" % type)
print("{")
print(" if (format >= PIPE_FORMAT_COUNT) {")
print(" if (format >= ARRAY_SIZE(util_format_%sdescriptions))" % (type))
print(" return NULL;")
print(" }")
print()
print(" switch (format) {")
for format in formats:
print(" case %s:" % format.name)
print(" return &util_format_%s_%sdescription;" % (format.short_name(), type))
print(" default:")
print(" return NULL;")
print(" }")
print(" return &util_format_%sdescriptions[format];" % (type))
print("}")
print()
print('static const struct util_format_description')
print('util_format_descriptions[] = {')
for format in formats:
sn = format.short_name()
print('const struct util_format_description')
print('util_format_%s_description = {' % (sn,))
print(" [%s] = {" % (format.name,))
print(" %s," % (format.name,))
print(" \"%s\"," % (format.name,))
print(" \"%s\"," % (sn,))
@@ -162,43 +188,24 @@ def write_format_table(formats):
u_format_pack.print_channels(format, do_channel_array)
u_format_pack.print_channels(format, do_swizzle_array)
print(" %s," % (colorspace_map(format.colorspace),))
print("};")
print(" },")
print()
print("};")
print()
generate_table_getter("")
# We don't generate code for YUV formats, and many of the new ones lack pack/unpack
# functions for softpipe/llvmpipe.
noaccess_formats = [
'yv12',
'yv16',
'iyuv',
'nv12',
'nv16',
'nv21',
'p010',
'p012',
'p016',
'xyuv',
'ayuv',
'r8g8_r8b8_unorm',
'g8r8_b8r8_unorm',
'g8r8_g8b8_unorm',
'y8_u8_v8_422_unorm',
'y8_u8v8_422_unorm',
'y8_u8_v8_444_unorm',
'y16_u16_v16_420_unorm',
'y16_u16_v16_422_unorm',
'y16_u16v16_422_unorm',
'y16_u16_v16_444_unorm',
]
access = sn not in noaccess_formats
if format.layout in ('astc', 'atc', 'fxt1'):
access = False
if format.layout == 'etc' and sn != 'etc1_rgb8':
access = False
print('static const struct util_format_pack_description')
print('util_format_pack_descriptions[] = {')
for format in formats:
sn = format.short_name()
print('const struct util_format_pack_description')
print('util_format_%s_pack_description = {' % sn)
if format.colorspace != ZS and not format.is_pure_color() and access:
if not has_access(format):
print(" [%s] = { 0 }," % (format.name,))
continue
print(" [%s] = {" % (format.name,))
if format.colorspace != ZS and not format.is_pure_color():
print(" .pack_rgba_8unorm = &util_format_%s_pack_rgba_8unorm," % sn)
print(" .pack_rgba_float = &util_format_%s_pack_rgba_float," % sn)
@@ -212,12 +219,24 @@ def write_format_table(formats):
if format.is_pure_unsigned() or format.is_pure_signed():
print(" .pack_rgba_uint = &util_format_%s_pack_unsigned," % sn)
print(" .pack_rgba_sint = &util_format_%s_pack_signed," % sn)
print("};")
print(" },")
print()
print("};")
print()
generate_table_getter("pack_")
print('const struct util_format_unpack_description')
print('util_format_%s_unpack_description = {' % sn)
if format.colorspace != ZS and not format.is_pure_color() and access:
print('static const struct util_format_unpack_description')
print('util_format_unpack_descriptions[] = {')
for format in formats:
sn = format.short_name()
if not has_access(format):
print(" [%s] = { 0 }," % (format.name,))
continue
print(" [%s] = {" % (format.name,))
if format.colorspace != ZS and not format.is_pure_color():
print(" .unpack_rgba_8unorm = &util_format_%s_unpack_rgba_8unorm," % sn)
if format.layout == 's3tc' or format.layout == 'rgtc':
print(" .fetch_rgba_8unorm = &util_format_%s_fetch_rgba_8unorm," % sn)
@@ -237,11 +256,10 @@ def write_format_table(formats):
elif format.is_pure_signed():
print(" .unpack_rgba = &util_format_%s_unpack_signed," % sn)
print(" .fetch_rgba_sint = &util_format_%s_fetch_signed," % sn)
print("};")
print()
print(" },")
print("};")
print()
generate_table_getter("")
generate_table_getter("pack_")
generate_table_getter("unpack_")
def main():