From 4cb7047f0fa000c83ca5592d9a64a2cbc96d8fdc Mon Sep 17 00:00:00 2001
From: Michael Matz <matz@suse.de>
Date: Thu, 4 Aug 2016 04:47:03 +0200
Subject: x86-64-asm: Support high registers %r8 - %r15

This requires correctly handling the REX prefix.
As bonus we now also support the four 8bit registers
spl,bpl,sil,dil, which are decoded as ah,ch,dh,bh in non-long-mode
(and require a REX prefix as well).
---
 i386-tok.h | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'i386-tok.h')

diff --git a/i386-tok.h b/i386-tok.h
index cf65897..8c25af0 100644
--- a/i386-tok.h
+++ b/i386-tok.h
@@ -93,6 +93,14 @@
  DEF_ASM(st)
  DEF_ASM(rip)
 
+#ifdef TCC_TARGET_X86_64
+ /* The four low parts of sp/bp/si/di that exist only on
+    x86-64 (encoding aliased to ah,ch,dh,dh when not using REX). */
+ DEF_ASM(spl)
+ DEF_ASM(bpl)
+ DEF_ASM(sil)
+ DEF_ASM(dil)
+#endif
  /* generic two operands */
  DEF_BWLX(mov)
 
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