9be5fd3c87
By putting the parameters first that match the parameters to the call
site, 4 (of 14) instructions are saved at _mesa_Uniform4fv on x64. On
IA32, the details of the instructions change, but it is the same count
and mix of instructions.
Before:
0000000000000830 <_mesa_Uniform4fv>:
830: 48 83 ec 10 sub $0x10,%rsp
834: 49 89 d0 mov %rdx,%r8
837: 48 8b 15 00 00 00 00 mov 0x0(%rip),%rdx # 83e <_mesa_Uniform4fv+0xe>
83e: 89 f8 mov %edi,%eax
840: 89 f1 mov %esi,%ecx
842: 41 b9 02 00 00 00 mov $0x2,%r9d
848: 64 48 8b 3a mov %fs:(%rdx),%rdi
84c: 48 8b 97 c8 01 02 00 mov 0x201c8(%rdi),%rdx
853: 48 8b 72 70 mov 0x70(%rdx),%rsi
857: 6a 04 pushq $0x4
859: 89 c2 mov %eax,%edx
85b: e8 00 00 00 00 callq 860 <_mesa_Uniform4fv+0x30>
860: 48 83 c4 18 add $0x18,%rsp
864: c3 retq
After:
00000000000007f0 <_mesa_Uniform4fv>:
7f0: 48 83 ec 10 sub $0x10,%rsp
7f4: 48 8b 05 00 00 00 00 mov 0x0(%rip),%rax # 7fb <_mesa_Uniform4fv+0xb>
7fb: 41 b9 02 00 00 00 mov $0x2,%r9d
801: 64 48 8b 08 mov %fs:(%rax),%rcx
805: 48 8b 81 c8 01 02 00 mov 0x201c8(%rcx),%rax
80c: 6a 04 pushq $0x4
80e: 4c 8b 40 70 mov 0x70(%rax),%r8
812: e8 00 00 00 00 callq 817 <_mesa_Uniform4fv+0x27>
817: 48 83 c4 18 add $0x18,%rsp
81b: c3 retq
Saves a measly 416 bytes of text on x64. Depending on exactly when this
is applied, a lot of variation is possible due to function alignment.
text data bss dec hex filename
6670131 228340 22552 6921023 699b3f lib/i965_dri.so before
6670131 228340 22552 6921023 699b3f lib/i965_dri.so after
6343348 293872 29880 6667100 65bb5c lib64/i965_dri.so before
6342932 293872 29880 6666684 65b9bc lib64/i965_dri.so after
There is likely to be no performance change with just this patch.
_mesa_uniform immediately calls validate_uniform_parameters with
parameters in the "wrong" (different from the call site) order.
v2: Rebase on GL_ARB_gpu_shader_fp64.
v3: Rebase on GL_ARB_gpu_shader_int64.
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
File: docs/README.WIN32 Last updated: 21 June 2013 Quick Start ----- ----- Windows drivers are build with SCons. Makefiles or Visual Studio projects are no longer shipped or supported. Run scons libgl-gdi to build gallium based GDI driver. This will work both with MSVS or Mingw. Windows Drivers ------- ------- At this time, only the gallium GDI driver is known to work. Source code also exists in the tree for other drivers in src/mesa/drivers/windows, but the status of this code is unknown. Recipe ------ Building on windows requires several open-source packages. These are steps that work as of this writing. - install python 2.7 - install scons (latest) - install mingw, flex, and bison - install pywin32 from here: http://www.lfd.uci.edu/~gohlke/pythonlibs get pywin32-218.4.win-amd64-py2.7.exe - install git - download mesa from git see http://www.mesa3d.org/repository.html - run scons General ------- After building, you can copy the above DLL files to a place in your PATH such as $SystemRoot/SYSTEM32. If you don't like putting things in a system directory, place them in the same directory as the executable(s). Be careful about accidentially overwriting files of the same name in the SYSTEM32 directory. The DLL files are built so that the external entry points use the stdcall calling convention. Static LIB files are not built. The LIB files that are built with are the linker import files associated with the DLL files. The si-glu sources are used to build the GLU libs. This was done mainly to get the better tessellator code. If you have a Windows-related build problem or question, please post to the mesa-dev or mesa-users list.