From: Taylor R Campbell <campbell@mumble.net>
Date: Thu, 15 Aug 2019 14:24:35 +0000 (+0000)
Subject: Add release note.
X-Git-Tag: mit-scheme-pucked-10.1.20~11^2~80^2
X-Git-Url: https://birchwood-abbey.net/git?a=commitdiff_plain;h=f483d7d80ec428ef73723aa83375f88a0d6852fc;p=mit-scheme.git

Add release note.
---

diff --git a/src/relnotes/amd64 b/src/relnotes/amd64
new file mode 100644
index 000000000..78110f15e
--- /dev/null
+++ b/src/relnotes/amd64
@@ -0,0 +1,8 @@
+The AMD x86-64 ABI has been changed.
+
+- Newer Scheme versions must be cross-compiled from older ones using
+  `./configure --enable-cross-compiling'.
+- Old .com files must be recompiled.
+- The changes have performance improvements on many workloads, by
+  reducing the amount of self-modifying code and by making better use
+  of the CPU branch predictor.