Mesa (master): gk110/ir: fix sched calculator to consider all registers in the ISA

[Ilia Mirkin]

Module: Mesa
Branch: master
Commit: 2f5ee9bf27b912726dea969a5e5159e1d6665f6c
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=2f5ee9bf27b912726dea969a5e5159e1d6665f6c

Author: Ilia Mirkin <imirkin at alum.mit.edu>
Date:   Mon Aug 17 02:11:55 2015 -0400

gk110/ir: fix sched calculator to consider all registers in the ISA

GK110/GK208 have 256 registers, not 64. Find out the number of registers
from the target to avoid unnecessary iteration for pre-GK110.

Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>

---

 .../drivers/nouveau/codegen/nv50_ir_emit_nvc0.cpp     |   17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_emit_nvc0.cpp b/src/gallium/drivers/nouveau/codegen/nv50_ir_emit_nvc0.cpp
index f607f3b..5703712 100644
--- a/src/gallium/drivers/nouveau/codegen/nv50_ir_emit_nvc0.cpp
+++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_emit_nvc0.cpp
@@ -2614,11 +2614,12 @@ private:
          int imul; // integer MUL to MUL delay 3
       } res;
       struct ScoreData {
-         int r[64];
+         int r[256];
          int p[8];
          int c;
       } rd, wr;
       int base;
+      int regs;
 
       void rebase(const int base)
       {
@@ -2627,7 +2628,7 @@ private:
             return;
          this->base = 0;
 
-         for (int i = 0; i < 64; ++i) {
+         for (int i = 0; i < regs; ++i) {
             rd.r[i] += delta;
             wr.r[i] += delta;
          }
@@ -2646,16 +2647,17 @@ private:
          res.imul += delta;
          res.tex += delta;
       }
-      void wipe()
+      void wipe(int regs)
       {
          memset(&rd, 0, sizeof(rd));
          memset(&wr, 0, sizeof(wr));
          memset(&res, 0, sizeof(res));
+         this->regs = regs;
       }
       int getLatest(const ScoreData& d) const
       {
          int max = 0;
-         for (int i = 0; i < 64; ++i)
+         for (int i = 0; i < regs; ++i)
             if (d.r[i] > max)
                max = d.r[i];
          for (int i = 0; i < 8; ++i)
@@ -2690,7 +2692,7 @@ private:
       }
       void setMax(const RegScores *that)
       {
-         for (int i = 0; i < 64; ++i) {
+         for (int i = 0; i < regs; ++i) {
             rd.r[i] = MAX2(rd.r[i], that->rd.r[i]);
             wr.r[i] = MAX2(wr.r[i], that->wr.r[i]);
          }
@@ -2711,7 +2713,7 @@ private:
       }
       void print(int cycle)
       {
-         for (int i = 0; i < 64; ++i) {
+         for (int i = 0; i < regs; ++i) {
             if (rd.r[i] > cycle)
                INFO("rd $r%i @ %i\n", i, rd.r[i]);
             if (wr.r[i] > cycle)
@@ -2806,9 +2808,10 @@ SchedDataCalculator::getCycles(const Instruction *insn, int origDelay) const
 bool
 SchedDataCalculator::visit(Function *func)
 {
+   int regs = targ->getFileSize(FILE_GPR) + 1;
    scoreBoards.resize(func->cfg.getSize());
    for (size_t i = 0; i < scoreBoards.size(); ++i)
-      scoreBoards[i].wipe();
+      scoreBoards[i].wipe(regs);
    return true;
 }