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i965: Replace the subroutine-skipping jump in VS with a NOP if it's a NOP.

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This showed a 1.9% (+/-.3%, n=3) improvement in OA performance with high
geometry settings.
This commit is contained in:
Eric Anholt 2009-08-07 14:20:56 -07:00
parent 7de5e60c18
commit 9f981ec27d
1 changed files with 5 additions and 1 deletions
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6
src/mesa/drivers/dri/i965/brw_vs_emit.c
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@ -1262,7 +1262,11 @@ post_vs_emit( struct brw_vs_compile *c,
/* patch up the END code to jump past subroutines, etc */
offset = last_inst - end_inst;
brw_set_src1(end_inst, brw_imm_d(offset * 16));
if (offset > 1) {
brw_set_src1(end_inst, brw_imm_d(offset * 16));
} else {
end_inst->header.opcode = BRW_OPCODE_NOP;
}
}
static uint32_t