From 75528a497c1980a55256e068473da8e0d684c8ab Mon Sep 17 00:00:00 2001
From: Gabe Black <gblack@eecs.umich.edu>
Date: Mon, 17 Aug 2009 20:22:56 -0700
Subject: X86: Implement a mask move microop.

---
 src/arch/x86/isa/microops/mediaop.isa | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

(limited to 'src/arch')

diff --git a/src/arch/x86/isa/microops/mediaop.isa b/src/arch/x86/isa/microops/mediaop.isa
index bef661848..83962b0f2 100644
--- a/src/arch/x86/isa/microops/mediaop.isa
+++ b/src/arch/x86/isa/microops/mediaop.isa
@@ -347,6 +347,24 @@ let {{
             DestReg = DestReg | result;
         '''
 
+    class Maskmov(MediaOp):
+        code = '''
+            assert(srcSize == destSize);
+            int size = srcSize;
+            int sizeBits = size * 8;
+            int items = (ext & 0x1) ? 1: (sizeof(FloatRegBits) / size);
+            uint64_t result = FpDestReg.uqw;
+
+            for (int i = 0; i < items; i++) {
+                int hiIndex = (i + 1) * sizeBits - 1;
+                int loIndex = (i + 0) * sizeBits;
+                uint64_t arg1Bits = bits(FpSrcReg1.uqw, hiIndex, loIndex);
+                if (bits(FpSrcReg2.uqw, hiIndex))
+                    result = insertBits(result, hiIndex, loIndex, arg1Bits);
+            }
+            FpDestReg.uqw = result;
+        '''
+
     class Unpack(MediaOp):
         code = '''
             assert(srcSize == destSize);
-- 
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