1 files changed, 78 insertions, 0 deletions
diff --git a/sim/mips/vr.igen b/sim/mips/vr.igen
new file mode 100644
index 0000000..863bb55
--- /dev/null
+++ b/sim/mips/vr.igen
@@ -0,0 +1,78 @@
+// -*- C -*-
+//
+// NEC specific instructions
+//
+
+// Integer Instructions
+// --------------------
+//
+// MulAcc is the Multiply Accumulator.
+//     This register is mapped on the the HI and LO registers.
+//     Upper 32 bits of MulAcc is mapped on to lower 32 bits of HI register.
+//     Lower 32 bits of MulAcc is mapped on to lower 32 bits of LO register.
+
+
+:function:::unsigned64:MulAcc:
+*vr4100:
+{
+  unsigned64 result = U8_4 (HI, LO);
+  return result;
+}
+
+:function:::void:SET_MulAcc:unsigned64 value
+*vr4100:
+{
+  /* 64 bit specific */
+  *AL4_8 (&HI) = VH4_8 (value);
+  *AL4_8 (&LO) = VL4_8 (value);
+}
+
+:function:::signed64:SignedMultiply:signed32 l, signed32 r
+*vr4100:
+{
+  signed64 result = (signed64) l * (signed64) r;
+  return result;
+}
+
+:function:::unsigned64:UnsignedMultiply:unsigned32 l, unsigned32 r
+*vr4100:
+{
+  unsigned64 result = (unsigned64) l * (unsigned64) r;
+  return result;
+}
+
+:function:::unsigned64:Low32Bits:unsigned64 value
+*vr4100:
+{
+  unsigned64 result = (signed64) (signed32) VL4_8 (value);
+  return result;
+}
+
+:function:::unsigned64:High32Bits:unsigned64 value
+*vr4100:
+{
+  unsigned64 result = (signed64) (signed32) VH4_8 (value);
+  return result;
+}
+
+
+
+// Multiply, Accumulate
+000000,5.RS,5.RT,00000,00000,101000::64::MAC
+"mac r<RS>, r<RT>"
+*vr4100:
+{
+  SET_MulAcc (SD_, MulAcc (SD_) + SignedMultiply (SD_, GPR[RS], GPR[RT]));
+}
+
+
+// D-Multiply, Accumulate
+000000,5.RS,5.RT,00000,00000,101001::64::DMAC
+"dmac r<RS>, r<RT>"
+*vr4100:
+{
+  LO = LO + SignedMultiply (SD_, GPR[RS], GPR[RT]);
+}
+
+
+