CELL: two-sided stencil fixes

With these changes, the tests/stencil_twoside test now works.

- Eliminate blending from the stencil_twoside test, as it produces an
  unneeded dependency on having blending working

- The spe_splat() function will now work if the register being splatted
  and the destination register are the same

- Separate fragment code generated for front-facing and back-facing
  fragments.  Often these are the same; if two-sided stenciling is on,
  they can be different.  This is easier and faster than generating
  code that does both tests and merges the results.

- Fixed a cut/paste bug where if the back Z-pass stencil operation
  were different from all the other operations, the back Z-fail
  results were incorrect.

1 files changed, 0 insertions, 2 deletions

diff --git a/progs/tests/stencil_twoside.c b/progs/tests/stencil_twoside.c
index be9d9a776a..8826c46fc2 100644
--- a/progs/tests/stencil_twoside.c
+++ b/progs/tests/stencil_twoside.c
@@ -115,7 +115,6 @@ static void Display( void )
    glVertex2f(-1,  1);
    glEnd();
 
-
    if (use20syntax) {
       stencil_func_separate(GL_FRONT, GL_ALWAYS, 0, ~0);
       stencil_func_separate(GL_BACK, GL_ALWAYS, 0, ~0);
@@ -279,7 +278,6 @@ static void Init( void )
    stencil_op_separate = glutGetProcAddress( "glStencilOpSeparate" );
 
    printf("\nAll 5 squares should be the same color.\n");
-   glEnable( GL_BLEND );
 }