sourcebuild.texi (Effective-Target Keywords): Document avx_runtime.

	* doc/sourcebuild.texi (Effective-Target Keywords): Document
	avx_runtime.

From-SVN: r169439

gcc/ChangeLog

 2011-01-31  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 
+	* doc/sourcebuild.texi (Effective-Target Keywords): Document
+	avx_runtime.
+
+2011-01-31  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
+
 	* configure.ac (gcc_cv_ld_eh_frame_hdr): Update minimal Sun ld
 	version number.
 	* configure: Regenerate.

gcc/doc/sourcebuild.texi

@@ -1588,7 +1588,10 @@ PowerPC target supports executing AltiVec instructions.
 
 @table @code
 @item avx
-Target supports compiling AVX instructions.
+Target supports compiling @code{avx} instructions.
+
+@item avx_runtime
+Target supports the execution of @code{avx} instructions.
 
 @item cell_hw
 Test system can execute AltiVec and Cell PPU instructions.