ARM: Add a comment to vfp.cc that explains the asm statements.

2010-06-02 12:58:18 -05:00
parent 10031a0327
commit e50e6a260f
1 changed files with 6 additions and 0 deletions
--- a/src/arch/arm/insts/vfp.cc
+++ b/src/arch/arm/insts/vfp.cc
@@ -39,6 +39,12 @@

 #include "arch/arm/insts/vfp.hh"

+/*
+ * The asm statements below are to keep gcc from reordering code. Otherwise
+ * the rounding mode might be set after the operation it was intended for, the
+ * exception bits read before it, etc.
+ */
+
 std::string
 FpRegRegOp::generateDisassembly(Addr pc, const SymbolTable *symtab) const
 {