doc: document imm64 optimization

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

diff --git a/doc/changes.src b/doc/changes.src
index 0cb5f27..4c0c305 100644 (file)
--- a/doc/changes.src
+++ b/doc/changes.src
@@ -7,6 +7,15 @@
 The NASM 2 series support x86-64, and is the production version of NASM
 since 2007.
 
+\S{cl-2.10} Version 2.10
+
+\b When optimization is enabled, \c{mov r64,imm} now optimizes to the
+  shortest form possible between:
+
+\c      mov r32,imm32                  ;  5 bytes
+\c     mov r64,imm32                   ;  7 bytes
+\c     mov r64,imm64                   ; 10 bytes
+
 
 \S{cl-2.09} Version 2.09