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 | 30 |
1 files changed, 18 insertions, 12 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..d7f75e3685 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 */ @@ -709,10 +714,11 @@ get_constant(struct brw_vs_compile *c, struct brw_compile *p = &c->func; struct brw_reg const_reg; struct brw_reg const2_reg; + const GLboolean relAddr = src->RelAddr; assert(argIndex < 3); - if (c->current_const[argIndex].index != src->Index || src->RelAddr) { + if (c->current_const[argIndex].index != src->Index || relAddr) { struct brw_reg addrReg = c->regs[PROGRAM_ADDRESS][0]; c->current_const[argIndex].index = src->Index; @@ -725,13 +731,13 @@ get_constant(struct brw_vs_compile *c, brw_dp_READ_4_vs(p, c->current_const[argIndex].reg,/* writeback dest */ 0, /* oword */ - src->RelAddr, /* relative indexing? */ + relAddr, /* relative indexing? */ addrReg, /* address register */ 16 * src->Index, /* byte offset */ SURF_INDEX_VERT_CONST_BUFFER /* binding table index */ ); - if (src->RelAddr) { + if (relAddr) { /* second read */ const2_reg = get_tmp(c); @@ -742,7 +748,7 @@ get_constant(struct brw_vs_compile *c, brw_dp_READ_4_vs(p, const2_reg, /* writeback dest */ 1, /* oword */ - src->RelAddr, /* relative indexing? */ + relAddr, /* relative indexing? */ addrReg, /* address register */ 16 * src->Index, /* byte offset */ SURF_INDEX_VERT_CONST_BUFFER @@ -752,7 +758,7 @@ get_constant(struct brw_vs_compile *c, const_reg = c->current_const[argIndex].reg; - if (src->RelAddr) { + if (relAddr) { /* merge the two Owords into the constant register */ /* const_reg[7..4] = const2_reg[7..4] */ brw_MOV(p, @@ -1219,7 +1225,7 @@ void brw_vs_emit(struct brw_vs_compile *c ) for (insn = 0; insn < nr_insns; insn++) { - struct prog_instruction *inst = &c->vp->program.Base.Instructions[insn]; + const struct prog_instruction *inst = &c->vp->program.Base.Instructions[insn]; struct brw_reg args[3], dst; GLuint i; @@ -1232,7 +1238,7 @@ void brw_vs_emit(struct brw_vs_compile *c ) */ if (inst->Opcode != OPCODE_SWZ) for (i = 0; i < 3; i++) { - struct prog_src_register *src = &inst->SrcReg[i]; + const struct prog_src_register *src = &inst->SrcReg[i]; index = src->Index; file = src->File; if (file == PROGRAM_OUTPUT && c->output_regs[index].used_in_src) |