X86: add pminu

3 files changed, 53 insertions, 0 deletions

diff --git a/miasm2/arch/x86/arch.py b/miasm2/arch/x86/arch.py
index 9bc8b3cc..95d9db0a 100644
--- a/miasm2/arch/x86/arch.py
+++ b/miasm2/arch/x86/arch.py
@@ -4042,6 +4042,18 @@ addop("pmaxud", [bs8(0x0f), bs8(0x38), bs8(0x3f), pref_66] +
       rmmod(xmm_reg, rm_arg_xmm))
 
 
+addop("pminub", [bs8(0x0f), bs8(0xda), no_xmm_pref] +
+      rmmod(mm_reg, rm_arg_mm))
+addop("pminub", [bs8(0x0f), bs8(0xda), pref_66] +
+      rmmod(xmm_reg, rm_arg_xmm))
+
+addop("pminuw", [bs8(0x0f), bs8(0x38), bs8(0x3a), pref_66] +
+      rmmod(xmm_reg, rm_arg_xmm))
+
+addop("pminud", [bs8(0x0f), bs8(0x38), bs8(0x3b), pref_66] +
+      rmmod(xmm_reg, rm_arg_xmm))
+
+
 mn_x86.bintree = factor_one_bit(mn_x86.bintree)
 # mn_x86.bintree = factor_fields_all(mn_x86.bintree)
 """
diff --git a/miasm2/arch/x86/sem.py b/miasm2/arch/x86/sem.py
index dd3f9bdd..ec0598d7 100644
--- a/miasm2/arch/x86/sem.py
+++ b/miasm2/arch/x86/sem.py
@@ -3536,6 +3536,31 @@ def pmaxud(ir, instr, a, b):
     return pmaxu(ir, instr, a, b, 32)
 
 
+def pminu(ir, instr, a, b, size):
+    e = []
+    for i in xrange(0, a.size, size):
+        op1 = a[i:i+size]
+        op2 = b[i:i+size]
+        res = op1 - op2
+        # Compote CF in @res = @op1 - @op2
+        ret = (((op1 ^ op2) ^ res) ^ ((op1 ^ res) & (op1 ^ op2))).msb()
+
+        e.append(m2_expr.ExprAff(a[i:i+size],
+                                 m2_expr.ExprCond(ret,
+                                                  a[i:i+size],
+                                                  b[i:i+size])))
+    return e, []
+
+def pminub(ir, instr, a, b):
+    return pminu(ir, instr, a, b, 8)
+
+def pminuw(ir, instr, a, b):
+    return pminu(ir, instr, a, b, 16)
+
+def pminud(ir, instr, a, b):
+    return pminu(ir, instr, a, b, 32)
+
+
 mnemo_func = {'mov': mov,
               'xchg': xchg,
               'movzx': movzx,
@@ -3962,6 +3987,10 @@ mnemo_func = {'mov': mov,
               "pmaxub" : pmaxub,
               "pmaxuw" : pmaxuw,
               "pmaxud" : pmaxud,
+
+              "pminub" : pminub,
+              "pminuw" : pminuw,
+              "pminud" : pminud,
               }
 
 
diff --git a/test/arch/x86/arch.py b/test/arch/x86/arch.py
index 27b426e2..b10497ae 100644
--- a/test/arch/x86/arch.py
+++ b/test/arch/x86/arch.py
@@ -2663,6 +2663,18 @@ reg_tests = [
     (m32, "00000000    PMAXUD     XMM2, XMMWORD PTR [EDX]",
     "660F383F12"),
 
+
+
+    (m32, "00000000    PMINUB     MM2, QWORD PTR [EDX]",
+    "0FDA12"),
+    (m32, "00000000    PMINUB     XMM2, XMMWORD PTR [EDX]",
+    "660FDA12"),
+
+    (m32, "00000000    PMINUW     XMM2, XMMWORD PTR [EDX]",
+    "660F383A12"),
+    (m32, "00000000    PMINUD     XMM2, XMMWORD PTR [EDX]",
+    "660F383B12"),
+
 ]