From 22c705ea8ce6317b039b01a6f593f565eb9789e1 Mon Sep 17 00:00:00 2001
From: Ilia Mirkin <imirkin@alum.mit.edu>
Date: Sat, 4 Feb 2017 22:29:17 -0500
Subject: [PATCH] nvc0/ir: add a "high" subop for shifts, emit shf.l/shf.r for
 64-bit

Note that this is not available for SM20/SM30.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
---
 src/gallium/drivers/nouveau/codegen/nv50_ir.h      |  1 +
 .../drivers/nouveau/codegen/nv50_ir_emit_gk110.cpp | 24 +++++++++-
 .../drivers/nouveau/codegen/nv50_ir_emit_gm107.cpp | 52 +++++++++++++++++++++-
 3 files changed, 74 insertions(+), 3 deletions(-)

diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir.h b/src/gallium/drivers/nouveau/codegen/nv50_ir.h
index 56e0287..b7fd19d 100644
--- a/src/gallium/drivers/nouveau/codegen/nv50_ir.h
+++ b/src/gallium/drivers/nouveau/codegen/nv50_ir.h
@@ -175,6 +175,7 @@ enum operation
 #define NV50_IR_SUBOP_LDC_IS       2
 #define NV50_IR_SUBOP_LDC_ISL      3
 #define NV50_IR_SUBOP_SHIFT_WRAP   1
+#define NV50_IR_SUBOP_SHIFT_HIGH   2
 #define NV50_IR_SUBOP_EMU_PRERET   1
 #define NV50_IR_SUBOP_TEXBAR(n)    n
 #define NV50_IR_SUBOP_MOV_FINAL    1
diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_emit_gk110.cpp b/src/gallium/drivers/nouveau/codegen/nv50_ir_emit_gk110.cpp
index 4b1caa4..0328650 100644
--- a/src/gallium/drivers/nouveau/codegen/nv50_ir_emit_gk110.cpp
+++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_emit_gk110.cpp
@@ -109,6 +109,7 @@ private:
    void emitBFIND(const Instruction *);
    void emitPERMT(const Instruction *);
    void emitShift(const Instruction *);
+   void emitShift64(const Instruction *);
 
    void emitSFnOp(const Instruction *, uint8_t subOp);
 
@@ -936,6 +937,24 @@ CodeEmitterGK110::emitShift(const Instruction *i)
 }
 
 void
+CodeEmitterGK110::emitShift64(const Instruction *i)
+{
+   if (i->op == OP_SHR) {
+      emitForm_21(i, 0x27c, 0xc7c);
+      if (isSignedType(i->sType))
+         code[1] |= 0x100;
+      if (i->subOp & NV50_IR_SUBOP_SHIFT_HIGH)
+         code[1] |= 1 << 19;
+   } else {
+      emitForm_21(i, 0xdfc, 0xf7c);
+   }
+   code[1] |= 0x200;
+
+   if (i->subOp & NV50_IR_SUBOP_SHIFT_WRAP)
+      code[1] |= 1 << 21;
+}
+
+void
 CodeEmitterGK110::emitPreOp(const Instruction *i)
 {
    emitForm_C(i, 0x248, 0x2);
@@ -2475,7 +2494,10 @@ CodeEmitterGK110::emitInstruction(Instruction *insn)
       break;
    case OP_SHL:
    case OP_SHR:
-      emitShift(insn);
+      if (typeSizeof(insn->sType) == 8)
+         emitShift64(insn);
+      else
+         emitShift(insn);
       break;
    case OP_SET:
    case OP_SET_AND:
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 21b9ac4..8fec6a8 100644
--- a/src/gallium/drivers/nouveau/codegen/nv50_ir_emit_gm107.cpp
+++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_emit_gm107.cpp
@@ -161,6 +161,7 @@ private:
    void emitISETP();
    void emitSHL();
    void emitSHR();
+   void emitSHF();
    void emitPOPC();
    void emitBFI();
    void emitBFE();
@@ -2072,6 +2073,47 @@ CodeEmitterGM107::emitSHR()
 }
 
 void
+CodeEmitterGM107::emitSHF()
+{
+   unsigned type;
+
+   switch (insn->src(1).getFile()) {
+   case FILE_GPR:
+      emitInsn(insn->op == OP_SHL ? 0x5bf80000 : 0x5cf80000);
+      emitGPR(0x14, insn->src(1));
+      break;
+   case FILE_IMMEDIATE:
+      emitInsn(insn->op == OP_SHL ? 0x36f80000 : 0x38f80000);
+      emitIMMD(0x14, 19, insn->src(1));
+      break;
+   default:
+      assert(!"bad src1 file");
+      break;
+   }
+
+   switch (insn->sType) {
+   case TYPE_U64:
+      type = 2;
+      break;
+   case TYPE_S64:
+      type = 3;
+      break;
+   default:
+      type = 0;
+      break;
+   }
+
+   emitField(0x32, 1, !!(insn->subOp & NV50_IR_SUBOP_SHIFT_WRAP));
+   emitX    (0x31);
+   emitField(0x30, 1, !!(insn->subOp & NV50_IR_SUBOP_SHIFT_HIGH));
+   emitCC   (0x2f);
+   emitGPR  (0x27, insn->src(2));
+   emitField(0x25, 2, type);
+   emitGPR  (0x08, insn->src(0));
+   emitGPR  (0x00, insn->def(0));
+}
+
+void
 CodeEmitterGM107::emitPOPC()
 {
    switch (insn->src(0).getFile()) {
@@ -3169,10 +3211,16 @@ CodeEmitterGM107::emitInstruction(Instruction *i)
       }
       break;
    case OP_SHL:
-      emitSHL();
+      if (typeSizeof(insn->sType) == 8)
+         emitSHF();
+      else
+         emitSHL();
       break;
    case OP_SHR:
-      emitSHR();
+      if (typeSizeof(insn->sType) == 8)
+         emitSHF();
+      else
+         emitSHR();
       break;
    case OP_POPCNT:
       emitPOPC();
-- 
2.7.4