From: Richard Sandiford Date: Wed, 19 Mar 2014 17:11:02 +0000 (+0000) Subject: util: Fix cross-compiles between endiannesses X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=6c8f547f66e68b495c708f8ffcb67370caa5ffe8;p=mesa.git util: Fix cross-compiles between endiannesses The old python code used sys.is_big_endian to select between little-endian and big-endian formats, which meant that the build and host endiannesses needed to be the same. This patch instead generates both big- and little- endian layouts, using PIPE_ARCH_BIG_ENDIAN to select between them. Signed-off-by: Richard Sandiford Signed-off-by: José Fonseca --- diff --git a/src/gallium/auxiliary/util/u_format_pack.py b/src/gallium/auxiliary/util/u_format_pack.py index 7acc34e8f9a..f9496de6c8a 100644 --- a/src/gallium/auxiliary/util/u_format_pack.py +++ b/src/gallium/auxiliary/util/u_format_pack.py @@ -51,7 +51,14 @@ def inv_swizzles(swizzles): return inv_swizzle def print_channels(format, func): - func(format.channels, format.swizzles) + if format.nr_channels() <= 1: + func(format.le_channels, format.le_swizzles) + else: + print '#ifdef PIPE_ARCH_BIG_ENDIAN' + func(format.be_channels, format.be_swizzles) + print '#else' + func(format.le_channels, format.le_swizzles) + print '#endif' def generate_format_type(format): '''Generate a structure that describes the format.''' @@ -105,7 +112,7 @@ def generate_format_type(format): print ' uint%u_t value;' % (format.block_size(),) use_bitfields = False - for channel in format.channels: + for channel in format.le_channels: if channel.size % 8 or not is_pot(channel.size): use_bitfields = True @@ -129,7 +136,7 @@ def is_format_supported(format): return False for i in range(4): - channel = format.channels[i] + channel = format.le_channels[i] if channel.type not in (VOID, UNSIGNED, SIGNED, FLOAT, FIXED): return False if channel.type == FLOAT and channel.size not in (16, 32, 64): diff --git a/src/gallium/auxiliary/util/u_format_parse.py b/src/gallium/auxiliary/util/u_format_parse.py index 9f6ac36de11..15cc6d4fe15 100755 --- a/src/gallium/auxiliary/util/u_format_parse.py +++ b/src/gallium/auxiliary/util/u_format_parse.py @@ -30,8 +30,6 @@ ''' -import sys - VOID, UNSIGNED, SIGNED, FIXED, FLOAT = range(5) SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Z, SWIZZLE_W, SWIZZLE_0, SWIZZLE_1, SWIZZLE_NONE, = range(7) @@ -44,9 +42,6 @@ YUV = 'yuv' ZS = 'zs' -# Not cross-compiler friendly -is_big_endian = sys.byteorder == 'big' - def is_pot(x): return (x & (x - 1)) == 0 @@ -109,13 +104,15 @@ class Channel: class Format: '''Describe a pixel format.''' - def __init__(self, name, layout, block_width, block_height, channels, swizzles, colorspace): + def __init__(self, name, layout, block_width, block_height, le_channels, le_swizzles, be_channels, be_swizzles, colorspace): self.name = name self.layout = layout self.block_width = block_width self.block_height = block_height - self.channels = channels - self.swizzles = swizzles + self.le_channels = le_channels + self.le_swizzles = le_swizzles + self.be_channels = be_channels + self.be_swizzles = be_swizzles self.name = name self.colorspace = colorspace @@ -134,13 +131,13 @@ class Format: def block_size(self): size = 0 - for channel in self.channels: + for channel in self.le_channels: size += channel.size return size def nr_channels(self): nr_channels = 0 - for channel in self.channels: + for channel in self.le_channels: if channel.size: nr_channels += 1 return nr_channels @@ -148,10 +145,10 @@ class Format: def array_element(self): if self.layout != PLAIN: return None - ref_channel = self.channels[0] + ref_channel = self.le_channels[0] if ref_channel.type == VOID: - ref_channel = self.channels[1] - for channel in self.channels: + ref_channel = self.le_channels[1] + for channel in self.le_channels: if channel.size and (channel.size != ref_channel.size or channel.size % 8): return None if channel.type != VOID: @@ -169,10 +166,10 @@ class Format: def is_mixed(self): if self.layout != PLAIN: return False - ref_channel = self.channels[0] + ref_channel = self.le_channels[0] if ref_channel.type == VOID: - ref_channel = self.channels[1] - for channel in self.channels[1:]: + ref_channel = self.le_channels[1] + for channel in self.le_channels[1:]: if channel.type != VOID: if channel.type != ref_channel.type: return True @@ -188,7 +185,7 @@ class Format: def is_int(self): if self.layout != PLAIN: return False - for channel in self.channels: + for channel in self.le_channels: if channel.type not in (VOID, UNSIGNED, SIGNED): return False return True @@ -196,7 +193,7 @@ class Format: def is_float(self): if self.layout != PLAIN: return False - for channel in self.channels: + for channel in self.le_channels: if channel.type not in (VOID, FLOAT): return False return True @@ -206,7 +203,7 @@ class Format: return False if self.block_size() not in (8, 16, 32): return False - for channel in self.channels: + for channel in self.le_channels: if channel.type not in (VOID, UNSIGNED, SIGNED): return False return True @@ -215,7 +212,7 @@ class Format: if self.layout != PLAIN or self.colorspace == ZS: return False pures = [channel.pure - for channel in self.channels + for channel in self.le_channels if channel.type != VOID] for x in pures: assert x == pures[0] @@ -223,7 +220,7 @@ class Format: def channel_type(self): types = [channel.type - for channel in self.channels + for channel in self.le_channels if channel.type != VOID] for x in types: assert x == types[0] @@ -236,7 +233,7 @@ class Format: return self.is_pure_color() and self.channel_type() == UNSIGNED def has_channel(self, id): - return self.swizzles[id] != SWIZZLE_NONE + return self.le_swizzles[id] != SWIZZLE_NONE def has_depth(self): return self.colorspace == ZS and self.has_channel(0) @@ -339,15 +336,25 @@ def parse(filename): block_width, block_height = map(int, fields[2:4]) colorspace = fields[9] - swizzles = [_swizzle_parse_map[swizzle] for swizzle in fields[8]] - channels = _parse_channels(fields[4:8], layout, colorspace, swizzles) + le_swizzles = [_swizzle_parse_map[swizzle] for swizzle in fields[8]] + le_channels = _parse_channels(fields[4:8], layout, colorspace, le_swizzles) + + be_swizzles = [_swizzle_parse_map[swizzle] for swizzle in fields[8]] + be_channels = _parse_channels(fields[4:8], layout, colorspace, be_swizzles) + + le_shift = 0 + for channel in le_channels: + channel.shift = le_shift + le_shift += channel.size + + be_shift = 0 + for channel in be_channels[3::-1]: + channel.shift = be_shift + be_shift += channel.size - shift = 0 - for channel in channels[3::-1] if is_big_endian else channels: - channel.shift = shift - shift += channel.size + assert le_shift == be_shift - format = Format(name, layout, block_width, block_height, channels, swizzles, colorspace) + format = Format(name, layout, block_width, block_height, le_channels, le_swizzles, be_channels, be_swizzles, colorspace) formats.append(format) return formats