From: Gabe Black <gblack@eecs.umich.edu>
Date: Wed, 2 Jun 2010 17:58:08 +0000 (-0500)
Subject: ARM: Implement the bfc and bfi instructions.
X-Git-Tag: stable_2012_02_02~1236
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=a37b6b6bce6b0aa04de270b756d624fd9c3afad2;p=gem5.git

ARM: Implement the bfc and bfi instructions.
---

diff --git a/src/arch/arm/isa/insts/misc.isa b/src/arch/arm/isa/insts/misc.isa
index e3c3132d9..d6ab47f5d 100644
--- a/src/arch/arm/isa/insts/misc.isa
+++ b/src/arch/arm/isa/insts/misc.isa
@@ -479,4 +479,25 @@ let {{
     header_output += RegRegImmImmOpDeclare.subst(sbfxIop)
     decoder_output += RegRegImmImmOpConstructor.subst(sbfxIop)
     exec_output += PredOpExecute.subst(sbfxIop)
+
+    bfcCode = '''
+        Dest = Op1 & ~(mask(imm2 - imm1 + 1) << imm1);
+    '''
+    bfcIop = InstObjParams("bfc", "Bfc", "RegRegImmImmOp",
+                           { "code": bfcCode,
+                             "predicate_test": predicateTest }, [])
+    header_output += RegRegImmImmOpDeclare.subst(bfcIop)
+    decoder_output += RegRegImmImmOpConstructor.subst(bfcIop)
+    exec_output += PredOpExecute.subst(bfcIop)
+
+    bfiCode = '''
+        uint32_t bitMask = (mask(imm2 - imm1 + 1) << imm1);
+        Dest = ((Op1 << imm1) & bitMask) | (Dest & ~bitMask);
+    '''
+    bfiIop = InstObjParams("bfi", "Bfi", "RegRegImmImmOp",
+                           { "code": bfiCode,
+                             "predicate_test": predicateTest }, [])
+    header_output += RegRegImmImmOpDeclare.subst(bfiIop)
+    decoder_output += RegRegImmImmOpConstructor.subst(bfiIop)
+    exec_output += PredOpExecute.subst(bfiIop)
 }};