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
--- 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