From c82086f7e9e251a7ad60f6aa1f64f011b14720b6 Mon Sep 17 00:00:00 2001
From: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Date: Tue, 1 Mar 2016 18:57:58 +0100
Subject: gm107/ir: add emission for BAR

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
---
 .../drivers/nouveau/codegen/nv50_ir_emit_gm107.cpp | 52 ++++++++++++++++++++++
 1 file changed, 52 insertions(+)

(limited to 'src/gallium')

diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_emit_gm107.cpp b/src/gallium/drivers/nouveau/codegen/nv50_ir_emit_gm107.cpp
index a383c53fcd3..0e621e06f49 100644
--- a/src/gallium/drivers/nouveau/codegen/nv50_ir_emit_gm107.cpp
+++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_emit_gm107.cpp
@@ -194,6 +194,7 @@ private:
    void emitKIL();
    void emitOUT();
 
+   void emitBAR();
    void emitMEMBAR();
 
    void emitVOTE();
@@ -2648,6 +2649,54 @@ CodeEmitterGM107::emitOUT()
    emitGPR  (0x00, insn->def(0));
 }
 
+void
+CodeEmitterGM107::emitBAR()
+{
+   uint8_t subop;
+
+   emitInsn (0xf0a80000);
+
+   switch (insn->subOp) {
+   case NV50_IR_SUBOP_BAR_RED_POPC: subop = 0x02; break;
+   case NV50_IR_SUBOP_BAR_RED_AND:  subop = 0x0a; break;
+   case NV50_IR_SUBOP_BAR_RED_OR:   subop = 0x12; break;
+   case NV50_IR_SUBOP_BAR_ARRIVE:   subop = 0x81; break;
+   default:
+      subop = 0x80;
+      assert(insn->subOp == NV50_IR_SUBOP_BAR_SYNC);
+      break;
+   }
+
+   emitField(0x20, 8, subop);
+
+   // barrier id
+   if (insn->src(0).getFile() == FILE_GPR) {
+      emitGPR(0x08, insn->src(0));
+   } else {
+      ImmediateValue *imm = insn->getSrc(0)->asImm();
+      assert(imm);
+      emitField(0x08, 8, imm->reg.data.u32);
+      emitField(0x2b, 1, 1);
+   }
+
+   // thread count
+   if (insn->src(1).getFile() == FILE_GPR) {
+      emitGPR(0x14, insn->src(1));
+   } else {
+      ImmediateValue *imm = insn->getSrc(0)->asImm();
+      assert(imm);
+      emitField(0x14, 12, imm->reg.data.u32);
+      emitField(0x2c, 1, 1);
+   }
+
+   if (insn->srcExists(2) && (insn->predSrc != 2)) {
+      emitPRED (0x27, insn->src(2));
+      emitField(0x2a, 1, insn->src(2).mod == Modifier(NV50_IR_MOD_NOT));
+   } else {
+      emitField(0x27, 3, 7);
+   }
+}
+
 void
 CodeEmitterGM107::emitMEMBAR()
 {
@@ -2978,6 +3027,9 @@ CodeEmitterGM107::emitInstruction(Instruction *i)
    case OP_RESTART:
       emitOUT();
       break;
+   case OP_BAR:
+      emitBAR();
+      break;
    case OP_MEMBAR:
       emitMEMBAR();
       break;
-- 
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