diff options
Diffstat (limited to 'src/mesa/drivers/dri/i965/brw_vs_emit.c')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_vs_emit.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_vs_emit.c b/src/mesa/drivers/dri/i965/brw_vs_emit.c index b69616d6e5..3fdc48583b 100644 --- a/src/mesa/drivers/dri/i965/brw_vs_emit.c +++ b/src/mesa/drivers/dri/i965/brw_vs_emit.c @@ -69,13 +69,18 @@ static void brw_vs_alloc_regs( struct brw_vs_compile *c ) { GLuint i, reg = 0, mrf; -#if 0 - if (c->vp->program.Base.Parameters->NumParameters >= 6) - c->vp->use_const_buffer = 1; + /* Determine whether to use a real constant buffer or use a block + * of GRF registers for constants. The later is faster but only + * works if everything fits in the GRF. + * XXX this heuristic/check may need some fine tuning... + */ + if (c->vp->program.Base.Parameters->NumParameters + + c->vp->program.Base.NumTemporaries + 20 > BRW_MAX_GRF) + c->vp->use_const_buffer = GL_TRUE; else -#endif c->vp->use_const_buffer = GL_FALSE; - /*printf("use_const_buffer = %d\n", c->use_const_buffer);*/ + + /*printf("use_const_buffer = %d\n", c->vp->use_const_buffer);*/ /* r0 -- reserved as usual */ |