This function converts from a8r8g8b8 to non-premultiplied RGBA (the
PNG or GdkPixbuf format that has the channels in this order: R, G, B,
A in memory regardless of the computer's endianness). The function's
new name is a8r8g8b8_to_rgba_np().
This program can compute the projective transformation that transforms
one quadrilateral into another. The code is basically maxima[1] output
translated into C.
[1] http://maxima.sourceforge.net/
In 32 bit mode the "=A" constraint refers to the register pair
edx:eax, but according to GCC developers this is not the case in 64
bit mode, where it refers to "rax".
Hence, using "=A" for rdtsc is incorrect in 64 bit mode.
See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21249
The xmmintrin.h as shipped with recent Visual C++ (2003+) provides
_mm_shuffle_pi16 and _mm_mulhi_pu16, so including that header
will do for using these functions, and MSVC does not like the GCC-specific
implementations of _mm_shuffle_pi16 and _mm_mulhi_pu16 that is
currently in the code.
_MM_SHUFFLE is declared in the same way in MSVC's xmmintrin.h, so don't
re-define it here to avoid a compilation warning.
Silence warnings that could make -Werror give a false negative
Use signed char to avoid cases where int8_t isn't declared
Reported-by: Mike Lothian <mike@fireburn.co.uk>
Tested-by: Mike Lothian <mike@fireburn.co.uk>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Jeremy Huddleston <jeremyhu@apple.com>
This code was pretty much coppied from a similar commit that I made to
xorg-server in April.
cf: xorg/xserver: bb4d145bd25e2aee988b100ecf1105ea3b6a40b8
Signed-off-by: Jeremy Huddleston <jeremyhu@apple.com>
Since the Solaris Studio compilers don't have a mode where MMX
instructions are available and SSE instructions are not, we can
just use the <xmmintrin.h> header directly.
Fixes build failure due to Studio not supporting the __gnu_inline__
or __artificial__ attributes.
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Acked-by: Matt Turner <mattst88@gmail.com>
With this, it becomes possible to do
PIXMAN_DISABLE="sse2 mmx" some_app
which will run some_app without SSE2 and MMX enabled. This is useful
for benchmarking, testing and narrowing down bugs.
The current list of implementations that can be disabled:
fast
mmx
sse2
arm-simd
arm-iwmmxt
arm-neon
mips-dspr2
vmx
The general and noop implementations can't be disabled because pixman
depends on those being available for correct operation.
Reviewed-by: Matt Turner <mattst88@gmail.com>
There are several issues with the Clang compiler and pixman-mmx.c:
- When not optimizing, it doesn't seem to recognize that an argument
to an __always_inline__ function is compile-time constant. This
results in this error being produced:
fatal error: error in backend: Invalid operand for inline asm
constraint 'K'!
- This inline assembly:
asm ("pmulhuw %1, %0\n\t"
: "+y" (__A)
: "y" (__B)
);
results in
fatal error: error in backend: Unsupported asm: input constraint
with a matching output constraint of incompatible type!
So disable MMX when the compiler is Clang.
Allows us to tune how we load data into the vector registers.
Signed-off-by: Matt Turner <mattst88@gmail.com>
And squashed in:
mmx: define and use load8888u function
For unaligned loads.
Signed-off-by: Matt Turner <mattst88@gmail.com>
It used to be slower than the generic code (with the gcc that was
current in 2007), but that doesn't seem to be the case anymore:
over_x888_8_8888 = L1: 22.97 L2: 22.88 M: 22.27 ( 5.29%) HT: 18.30 VT: 15.81 R: 15.54 RT: 10.35 ( 131Kops/s)
over_x888_8_8888 = L1: 53.56 L2: 53.20 M: 50.50 ( 11.99%) HT: 38.60 VT: 31.19 R: 29.00 RT: 17.37 ( 208Kops/s)
Reviewed-by: Matt Turner <mattst88@gmail.com>
The pshufw x86 instruction is part of Extended 3DNow! and SSE1. The
equivalent ARM wshufh instruction was available from the first iwMMXt
instrucion set.
This instruction is already used in the SSE2 code.
Reduces code size by ~9%.
amd64
text data bss dec hex filename
29925 2240 0 32165 7da5 .libs/libpixman_mmx_la-pixman-mmx.o
27237 2240 0 29477 7325 .libs/libpixman_mmx_la-pixman-mmx.o
x86
text data bss dec hex filename
27677 1792 0 29469 731d .libs/libpixman_mmx_la-pixman-mmx.o
24959 1792 0 26751 687f .libs/libpixman_mmx_la-pixman-mmx.o
arm
text data bss dec hex filename
30176 1792 0 31968 7ce0 .libs/libpixman_iwmmxt_la-pixman-mmx.o
27384 1792 0 29176 71f8 .libs/libpixman_iwmmxt_la-pixman-mmx.o
Signed-off-by: Matt Turner <mattst88@gmail.com>
The pmulhuw x86 instruction is part of Extended 3DNow! and SSE1. The
equivalent ARM wmuluh instruction was available from the first iwMMXt
instrucion set.
This instruction is already used in the SSE2 code.
Reduces code size by ~5%.
amd64
text data bss dec hex filename
31325 2240 0 33565 831d .libs/libpixman_mmx_la-pixman-mmx.o
29925 2240 0 32165 7da5 .libs/libpixman_mmx_la-pixman-mmx.o
x86
text data bss dec hex filename
29165 1792 0 30957 78ed .libs/libpixman_mmx_la-pixman-mmx.o
27677 1792 0 29469 731d .libs/libpixman_mmx_la-pixman-mmx.o
arm
text data bss dec hex filename
31632 1792 0 33424 8290 .libs/libpixman_iwmmxt_la-pixman-mmx.o
30176 1792 0 31968 7ce0 .libs/libpixman_iwmmxt_la-pixman-mmx.o
Signed-off-by: Matt Turner <mattst88@gmail.com>
Allows you to compile without -flax-vector-conversions in your CFLAGS,
though -march=iwmmxt2 is still necessary since specifying some other
-march= value will override it, and disable iwmmxt.
Signed-off-by: Matt Turner <mattst88@gmail.com>
