X86: Implement the sum of absolute differences instructions.

src/arch/x86/isa/decoder/two_byte_opcodes.isa

@@ -1073,7 +1073,7 @@
                     0x3: psllq_Pq_Qq();
                     0x4: Inst::PMULUDQ(Pq,Qq);
                     0x5: pmaddwd_Pq_Qq();
-                    0x6: psadbw_Pq_Qq();
+                    0x6: Inst::PSADBW(Pq,Qq);
                     0x7: maskmovq_Pq_PRq();
                     default: Inst::UD2();
                 }
@@ -1084,7 +1084,7 @@
                     0x3: psllq_Vo_Wo();
                     0x4: Inst::PMULUDQ(Vo,Wo);
                     0x5: pmaddwd_Vo_Wo();
-                    0x6: psadbw_Vo_Wo();
+                    0x6: Inst::PSADBW(Vo,Wo);
                     0x7: maskmovdqu_Vo_VRo();
                     default: Inst::UD2();
                 }

src/arch/x86/isa/insts/simd128/integer/arithmetic/sum_of_absolute_differences.py

@@ -54,5 +54,23 @@
 # Authors: Gabe Black
 
 microcode = '''
-# PSADBW
+def macroop PSADBW_XMM_XMM {
+    msad xmml, xmml, xmmlm, srcSize=1, destSize=2
+    msad xmmh, xmmh, xmmhm, srcSize=1, destSize=2
+};
+
+def macroop PSADBW_XMM_M {
+    ldfp ufp1, seg, sib, "DISPLACEMENT", dataSize=8
+    ldfp ufp2, seg, sib, "DISPLACEMENT + 8", dataSize=8
+    msad xmml, xmml, ufp1, srcSize=1, destSize=2
+    msad xmmh, xmmh, ufp2, srcSize=1, destSize=2
+};
+
+def macroop PSADBW_XMM_P {
+    rdip t7
+    ldfp ufp1, seg, riprel, "DISPLACEMENT", dataSize=8
+    ldfp ufp2, seg, riprel, "DISPLACEMENT + 8", dataSize=8
+    msad xmml, xmml, ufp1, srcSize=1, destSize=2
+    msad xmmh, xmmh, ufp2, srcSize=1, destSize=2
+};
 '''

src/arch/x86/isa/insts/simd64/integer/arithmetic/sum_of_absolute_differences.py

@@ -54,5 +54,18 @@
 # Authors: Gabe Black
 
 microcode = '''
-# PSADBW
+def macroop PSADBW_MMX_MMX {
+    msad mmx, mmx, mmxm, srcSize=1, destSize=2
+};
+
+def macroop PSADBW_MMX_M {
+    ldfp ufp1, seg, sib, disp, dataSize=8
+    msad mmx, mmx, ufp1, srcSize=1, destSize=2
+};
+
+def macroop PSADBW_MMX_P {
+    rdip t7
+    ldfp ufp1, seg, riprel, disp, dataSize=8
+    msad mmx, mmx, ufp1, srcSize=1, destSize=2
+};
 '''