[Beignet] [PATCH] GBE: fix one double related bugs for post register scheduling.

[Zhigang Gong]

We need to set the temporary register to U64 type, otherwise
latter post register scheduling will do some bad things.

Although we don't support double currently, this bug still could
be triggerred easily if you use printf("%f", foo).

Signed-off-by: Zhigang Gong <zhigang.gong at intel.com>
---
 backend/src/backend/gen75_encoder.cpp      | 3 ++-
 backend/src/backend/gen8_encoder.cpp       | 3 ++-
 backend/src/backend/gen_encoder.cpp        | 3 ++-
 backend/src/backend/gen_insn_selection.cpp | 6 +++---
 4 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/backend/src/backend/gen75_encoder.cpp b/backend/src/backend/gen75_encoder.cpp
index bd3dd67..c77ce4d 100644
--- a/backend/src/backend/gen75_encoder.cpp
+++ b/backend/src/backend/gen75_encoder.cpp
@@ -211,8 +211,9 @@ namespace gbe
     pop();
   }
 
-  void Gen75Encoder::MOV_DF(GenRegister dest, GenRegister src0, GenRegister r) {
+  void Gen75Encoder::MOV_DF(GenRegister dest, GenRegister src0, GenRegister tmp) {
     GBE_ASSERT((src0.type == GEN_TYPE_F && dest.isdf()) || (src0.isdf() && dest.type == GEN_TYPE_F));
+    GenRegister r = GenRegister::retype(tmp, GEN_TYPE_F);
     int w = curr.execWidth;
     GenRegister r0;
     r0 = GenRegister::h2(r);
diff --git a/backend/src/backend/gen8_encoder.cpp b/backend/src/backend/gen8_encoder.cpp
index 749bc52..ae2d4eb 100644
--- a/backend/src/backend/gen8_encoder.cpp
+++ b/backend/src/backend/gen8_encoder.cpp
@@ -219,8 +219,9 @@ namespace gbe
     pop();
   }
 
-  void Gen8Encoder::MOV_DF(GenRegister dest, GenRegister src0, GenRegister r) {
+  void Gen8Encoder::MOV_DF(GenRegister dest, GenRegister src0, GenRegister tmp) {
     GBE_ASSERT((src0.type == GEN_TYPE_F && dest.isdf()) || (src0.isdf() && dest.type == GEN_TYPE_F));
+    GenRegister r = GenRegister::retype(tmp, GEN_TYPE_F);
     int w = curr.execWidth;
     GenRegister r0;
     r0 = GenRegister::h2(r);
diff --git a/backend/src/backend/gen_encoder.cpp b/backend/src/backend/gen_encoder.cpp
index dc2cbd0..e4df109 100644
--- a/backend/src/backend/gen_encoder.cpp
+++ b/backend/src/backend/gen_encoder.cpp
@@ -618,8 +618,9 @@ namespace gbe
     MOV(dest.top_half(this->simdWidth), u1);
   }
 
-  void GenEncoder::MOV_DF(GenRegister dest, GenRegister src0, GenRegister r) {
+  void GenEncoder::MOV_DF(GenRegister dest, GenRegister src0, GenRegister tmp) {
     GBE_ASSERT((src0.type == GEN_TYPE_F && dest.isdf()) || (src0.isdf() && dest.type == GEN_TYPE_F));
+    GenRegister r = GenRegister::retype(tmp, GEN_TYPE_F);
     int w = curr.execWidth;
     GenRegister r0;
     int factor = 1;
diff --git a/backend/src/backend/gen_insn_selection.cpp b/backend/src/backend/gen_insn_selection.cpp
index b6d75b1..cd968c0 100644
--- a/backend/src/backend/gen_insn_selection.cpp
+++ b/backend/src/backend/gen_insn_selection.cpp
@@ -1982,7 +1982,7 @@ namespace gbe
           case ir::OP_MOV:
             if (dst.isdf()) {
               ir::Register r = sel.reg(ir::RegisterFamily::FAMILY_QWORD);
-              sel.MOV_DF(dst, src, sel.selReg(r));
+              sel.MOV_DF(dst, src, sel.selReg(r, ir::TYPE_U64));
             } else {
               sel.push();
                 auto dag = sel.regDAG[insn.getDst(0)];
@@ -2784,7 +2784,7 @@ namespace gbe
         case TYPE_S16: sel.MOV(dst, GenRegister::immw(imm.getIntegerValue())); break;
         case TYPE_U8:  sel.MOV(dst, GenRegister::immuw(imm.getIntegerValue())); break;
         case TYPE_S8:  sel.MOV(dst, GenRegister::immw(imm.getIntegerValue())); break;
-        case TYPE_DOUBLE: sel.LOAD_DF_IMM(dst, GenRegister::immdf(imm.getDoubleValue()), sel.selReg(sel.reg(FAMILY_QWORD))); break;
+        case TYPE_DOUBLE: sel.LOAD_DF_IMM(dst, GenRegister::immdf(imm.getDoubleValue()), sel.selReg(sel.reg(FAMILY_QWORD), TYPE_U64)); break;
         case TYPE_S64: sel.LOAD_INT64_IMM(dst, GenRegister::immint64(imm.getIntegerValue())); break;
         case TYPE_U64: sel.LOAD_INT64_IMM(dst, GenRegister::immint64(imm.getIntegerValue())); break;
         default: NOT_SUPPORTED;
@@ -3687,7 +3687,7 @@ namespace gbe
       } else if ((dst.isdf() && srcType == ir::TYPE_FLOAT) ||
                  (src.isdf() && dstType == ir::TYPE_FLOAT)) {
         ir::Register r = sel.reg(ir::RegisterFamily::FAMILY_QWORD);
-        sel.MOV_DF(dst, src, sel.selReg(r));
+        sel.MOV_DF(dst, src, sel.selReg(r, TYPE_U64));
       } else if (dst.isint64()) {
         switch(src.type) {
           case GEN_TYPE_F:
-- 
1.8.3.2