# HG changeset patch
# User Doug Simon <doug.simon@oracle.com>
# Date 1386936778 -3600
# Node ID 733cccc125ed1029b510a668ee0e6db7e91bf5ca
# Parent  32d2b0de15a8d4b7ac566e86794a27b6ab851cdb
added subqWide to AMD64Assembler
renamed HotSpotHostBackend.stackShadowPages to pagesToBang

diff -r 32d2b0de15a8 -r 733cccc125ed graal/com.oracle.graal.asm.amd64/src/com/oracle/graal/asm/amd64/AMD64Assembler.java
--- a/graal/com.oracle.graal.asm.amd64/src/com/oracle/graal/asm/amd64/AMD64Assembler.java	Fri Dec 13 12:25:28 2013 +0100
+++ b/graal/com.oracle.graal.asm.amd64/src/com/oracle/graal/asm/amd64/AMD64Assembler.java	Fri Dec 13 13:12:58 2013 +0100
@@ -2287,7 +2287,11 @@
         subq(dst, imm32, false);
     }
 
-    public final void subq(Register dst, int imm32, boolean force32Imm) {
+    public final void subqWide(Register dst, int imm32) {
+        subq(dst, imm32, true);
+    }
+
+    private void subq(Register dst, int imm32, boolean force32Imm) {
         prefixqAndEncode(dst.encoding);
         emitArith(0x81, 0xE8, dst, imm32, force32Imm);
     }
diff -r 32d2b0de15a8 -r 733cccc125ed graal/com.oracle.graal.hotspot.amd64/src/com/oracle/graal/hotspot/amd64/AMD64HotSpotBackend.java
--- a/graal/com.oracle.graal.hotspot.amd64/src/com/oracle/graal/hotspot/amd64/AMD64HotSpotBackend.java	Fri Dec 13 12:25:28 2013 +0100
+++ b/graal/com.oracle.graal.hotspot.amd64/src/com/oracle/graal/hotspot/amd64/AMD64HotSpotBackend.java	Fri Dec 13 13:12:58 2013 +0100
@@ -83,8 +83,8 @@
      * @param isVerifiedEntryPoint specifies if the code buffer is currently at the verified entry
      *            point
      */
-    protected static void emitStackOverflowCheck(CompilationResultBuilder crb, int stackShadowPages, boolean afterFrameInit, boolean isVerifiedEntryPoint) {
-        if (stackShadowPages > 0) {
+    protected static void emitStackOverflowCheck(CompilationResultBuilder crb, int pagesToBang, boolean afterFrameInit, boolean isVerifiedEntryPoint) {
+        if (pagesToBang > 0) {
 
             AMD64MacroAssembler asm = (AMD64MacroAssembler) crb.asm;
             int frameSize = crb.frameMap.frameSize();
@@ -92,7 +92,7 @@
                 int lastFramePage = frameSize / unsafe.pageSize();
                 // emit multiple stack bangs for methods with frames larger than a page
                 for (int i = 0; i <= lastFramePage; i++) {
-                    int disp = (i + stackShadowPages) * unsafe.pageSize();
+                    int disp = (i + pagesToBang) * unsafe.pageSize();
                     if (afterFrameInit) {
                         disp -= frameSize;
                     }
@@ -141,12 +141,12 @@
                 }
             } else {
                 int verifiedEntryPointOffset = asm.codeBuffer.position();
-                if (!isStub && stackShadowPages > 0) {
-                    emitStackOverflowCheck(crb, stackShadowPages, false, true);
+                if (!isStub && pagesToBang > 0) {
+                    emitStackOverflowCheck(crb, pagesToBang, false, true);
                     assert asm.codeBuffer.position() - verifiedEntryPointOffset >= PATCHED_VERIFIED_ENTRY_POINT_INSTRUCTION_SIZE;
                 }
                 if (!isStub && asm.codeBuffer.position() == verifiedEntryPointOffset) {
-                    asm.subq(rsp, frameSize, true);
+                    asm.subqWide(rsp, frameSize);
                     assert asm.codeBuffer.position() - verifiedEntryPointOffset >= PATCHED_VERIFIED_ENTRY_POINT_INSTRUCTION_SIZE;
                 } else {
                     asm.decrementq(rsp, frameSize);
diff -r 32d2b0de15a8 -r 733cccc125ed graal/com.oracle.graal.hotspot.sparc/src/com/oracle/graal/hotspot/sparc/SPARCHotSpotBackend.java
--- a/graal/com.oracle.graal.hotspot.sparc/src/com/oracle/graal/hotspot/sparc/SPARCHotSpotBackend.java	Fri Dec 13 12:25:28 2013 +0100
+++ b/graal/com.oracle.graal.hotspot.sparc/src/com/oracle/graal/hotspot/sparc/SPARCHotSpotBackend.java	Fri Dec 13 13:12:58 2013 +0100
@@ -81,15 +81,15 @@
      * @param afterFrameInit specifies if the stack pointer has already been adjusted to allocate
      *            the current frame
      */
-    protected static void emitStackOverflowCheck(CompilationResultBuilder crb, int stackShadowPages, boolean afterFrameInit) {
-        if (stackShadowPages > 0) {
+    protected static void emitStackOverflowCheck(CompilationResultBuilder crb, int pagesToBang, boolean afterFrameInit) {
+        if (pagesToBang > 0) {
             SPARCMacroAssembler masm = (SPARCMacroAssembler) crb.asm;
             final int frameSize = crb.frameMap.totalFrameSize();
             if (frameSize > 0) {
                 int lastFramePage = frameSize / unsafe.pageSize();
                 // emit multiple stack bangs for methods with frames larger than a page
                 for (int i = 0; i <= lastFramePage; i++) {
-                    int disp = (i + stackShadowPages) * unsafe.pageSize();
+                    int disp = (i + pagesToBang) * unsafe.pageSize();
                     if (afterFrameInit) {
                         disp -= frameSize;
                     }
@@ -124,8 +124,8 @@
             final int frameSize = crb.frameMap.totalFrameSize();
 
             SPARCMacroAssembler masm = (SPARCMacroAssembler) crb.asm;
-            if (!isStub && stackShadowPages > 0) {
-                emitStackOverflowCheck(crb, stackShadowPages, false);
+            if (!isStub && pagesToBang > 0) {
+                emitStackOverflowCheck(crb, pagesToBang, false);
             }
             new Save(sp, -frameSize, sp).emit(masm);
 
diff -r 32d2b0de15a8 -r 733cccc125ed graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/HotSpotHostBackend.java
--- a/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/HotSpotHostBackend.java	Fri Dec 13 12:25:28 2013 +0100
+++ b/graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/HotSpotHostBackend.java	Fri Dec 13 13:12:58 2013 +0100
@@ -40,11 +40,11 @@
     /**
      * This will be 0 if stack banging is disabled.
      */
-    protected final int stackShadowPages;
+    protected final int pagesToBang;
 
     public HotSpotHostBackend(HotSpotGraalRuntime runtime, HotSpotProviders providers) {
         super(runtime, providers);
-        this.stackShadowPages = runtime.getConfig().useStackBanging ? runtime.getConfig().stackShadowPages : 0;
+        this.pagesToBang = runtime.getConfig().useStackBanging ? runtime.getConfig().stackShadowPages : 0;
     }
 
     @Override