Subzero, MIPS32: Implements integer division instructions sdiv, udiv, srem, urem

This patch adds support for missing integer division instruction sdiv, udiv, srem, urem.

R=stichnot@chromium.org

Review URL: https://codereview.chromium.org/1989303002 .

Patch from Srdjan Obucina <Srdjan.Obucina@imgtec.com>.

src/IceTargetLoweringMIPS32.h

diff --git a/src/IceTargetLoweringMIPS32.h b/src/IceTargetLoweringMIPS32.h
index a90311a..e9f11a3 100644
--- a/src/IceTargetLoweringMIPS32.h
+++ b/src/IceTargetLoweringMIPS32.h
@@ -164,6 +164,14 @@
     Context.insert<InstMIPS32Addiu>(Dest, Src, Imm);
   }
 
+  void _div(Variable *Dest, Variable *Src0, Variable *Src1) {
+    Context.insert<InstMIPS32Div>(Dest, Src0, Src1);
+  }
+
+  void _divu(Variable *Dest, Variable *Src0, Variable *Src1) {
+    Context.insert<InstMIPS32Divu>(Dest, Src0, Src1);
+  }
+
   void _lui(Variable *Dest, uint32_t Imm) {
     Context.insert<InstMIPS32Lui>(Dest, Imm);
   }