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From 08de143bdd34e906c3e89443cb6b24665f7c088d Mon Sep 17 00:00:00 2001
From: Max Filippov <>
Date: Fri, 21 Sep 2012 04:18:07 +0400
Subject: [PATCH] tcg/README: document tcg_gen_goto_tb restrictions

for the whole story.

Signed-off-by: Max Filippov <>
Signed-off-by: Aurelien Jarno <>
Signed-off-by: Michael Roth <>
 tcg/README | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tcg/README b/tcg/README
index d03ae05..33783ee 100644
--- a/tcg/README
+++ b/tcg/README
@@ -392,7 +392,8 @@ Exit the current TB and return the value t0 (word type).
 Exit the current TB and jump to the TB index 'index' (constant) if the
 current TB was linked to this TB. Otherwise execute the next
+instructions. Only indices 0 and 1 are valid and tcg_gen_goto_tb may be issued
+at most once with each slot index per TB.
 * qemu_ld8u t0, t1, flags
 qemu_ld8s t0, t1, flags