mesa: Arrange _mesa_uniform parameters to match the call sites

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 <[email protected]>
Reviewed-by: Jordan Justen <[email protected]>

0 files changed, 0 insertions, 0 deletions