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authorIlia Mirkin <[email protected]>2015-12-08 18:46:34 -0500
committerIlia Mirkin <[email protected]>2015-12-08 23:15:29 -0500
commit44260d908062a4771c30ab635dd527f4266dbaec (patch)
treea03c655882e1ecf95d42b54bf7a5c16647304a21 /src/gallium/drivers
parentc1c1248b94e17a1a4fa0e6f353377efa99efe602 (diff)
nv50/ir: prefer to color mad def and src2 with the same color
This allows us to use the short encoding, and potentially fold immediates in later on. total instructions in shared programs : 6379731 -> 6367861 (-0.19%) total gprs used in shared programs : 728502 -> 728683 (0.02%) total local used in shared programs : 9904 -> 9904 (0.00%) total bytes used in shared programs : 44661008 -> 44154976 (-1.13%) local gpr inst bytes helped 0 51 7267 20306 hurt 0 232 125 274 Signed-off-by: Ilia Mirkin <[email protected]>
Diffstat (limited to 'src/gallium/drivers')
-rw-r--r--src/gallium/drivers/nouveau/codegen/nv50_ir_ra.cpp14
1 files changed, 14 insertions, 0 deletions
diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_ra.cpp b/src/gallium/drivers/nouveau/codegen/nv50_ir_ra.cpp
index a7d81774a83..b32bc13f755 100644
--- a/src/gallium/drivers/nouveau/codegen/nv50_ir_ra.cpp
+++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_ra.cpp
@@ -1465,6 +1465,20 @@ GCRA::allocateRegisters(ArrayList& insns)
if (lval) {
nodes[i].init(regs, lval);
RIG.insert(&nodes[i]);
+
+ if (lval->inFile(FILE_GPR) && lval->defs.size() > 0 &&
+ prog->getTarget()->getChipset() < 0xc0) {
+ Instruction *insn = lval->getInsn();
+ if (insn->op == OP_MAD || insn->op == OP_SAD)
+ // Short encoding only possible if they're all GPRs, no need to
+ // affect them otherwise.
+ if (insn->flagsDef < 0 &&
+ isFloatType(insn->dType) &&
+ insn->src(0).getFile() == FILE_GPR &&
+ insn->src(1).getFile() == FILE_GPR &&
+ insn->src(2).getFile() == FILE_GPR)
+ nodes[i].addRegPreference(getNode(insn->getSrc(2)->asLValue()));
+ }
}
}