gm107/ir: add OP_SELP emission, used in DSQRT lowering

The current DSQRT lowering code emits an OP_SELP, so we have to handle
its emission. This will eventually go away, but no harm supporting this
op.

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

src/gallium/drivers/nouveau/codegen/nv50_ir_emit_gm107.cpp

@@ -126,6 +126,7 @@ private:
    void emitF2I();
    void emitI2F();
    void emitI2I();
+   void emitSEL();
    void emitSHFL();
 
    void emitDADD();
@@ -893,6 +894,32 @@ CodeEmitterGM107::emitI2I()
    emitGPR  (0x00, insn->def(0));
 }
 
+void
+CodeEmitterGM107::emitSEL()
+{
+   switch (insn->src(1).getFile()) {
+   case FILE_GPR:
+      emitInsn(0x5ca00000);
+      emitGPR (0x14, insn->src(1));
+      break;
+   case FILE_MEMORY_CONST:
+      emitInsn(0x4ca00000);
+      emitCBUF(0x22, -1, 0x14, 16, 2, insn->src(1));
+      break;
+   case FILE_IMMEDIATE:
+      emitInsn(0x38a00000);
+      emitIMMD(0x14, 19, insn->src(1));
+      break;
+   default:
+      assert(!"bad src1 file");
+      break;
+   }
+
+   emitPRED(0x27, insn->src(2));
+   emitGPR (0x08, insn->src(0));
+   emitGPR (0x00, insn->def(0));
+}
+
 void
 CodeEmitterGM107::emitSHFL()
 {
@@ -2963,6 +2990,9 @@ CodeEmitterGM107::emitInstruction(Instruction *i)
             emitISETP();
       }
       break;
+   case OP_SELP:
+      emitSEL();
+      break;
    case OP_PRESIN:
    case OP_PREEX2:
       emitRRO();