From 8a46ee92b47adbe4d77d6d45d882c01d71989806 Mon Sep 17 00:00:00 2001
From: Joel Dice <joel.dice@gmail.com>
Date: Sun, 30 Jan 2011 14:28:02 -0700
Subject: [PATCH] use thunks for integer division on PowerPC

PowerPC doesn't generate traps for divides-by-zero, so we defer to
thunks which do explicit checks.
---
 src/powerpc.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/powerpc.cpp b/src/powerpc.cpp
index 55c2658dc0..e6be245100 100644
--- a/src/powerpc.cpp
+++ b/src/powerpc.cpp
@@ -2158,7 +2158,13 @@ class MyArchitecture: public Assembler::Architecture {
 
     case Divide:
     case Remainder:
-      if (BytesPerWord == 4 and aSize == 8) {
+      // todo: we shouldn't need to defer to thunks for integers which
+      // are smaller than or equal to tne native word size, but
+      // PowerPC doesn't generate traps for divide by zero, so we'd
+      // need to do the checks ourselves.  Using an inline check
+      // should be faster than calling an out-of-line thunk, but the
+      // thunk is easier, so they's what we do for now.
+      if (true) {//if (BytesPerWord == 4 and aSize == 8) {
         *thunk = true;        
       } else {
         *aTypeMask = (1 << RegisterOperand);