document riscv64 support in INSTALL document

diff --git a/INSTALL b/INSTALL
index a2a142b..dbe25a7 100644 (file)
--- a/INSTALL
+++ b/INSTALL
@@ -96,6 +96,11 @@ and ABI combinations:
 
 * OpenRISC 1000 (or1k)
 
+* RISC-V 64
+    * Little endian
+    * Hard, soft, and hard-single/soft-double floating point ABIs
+    * Standard ELF; no shared-text NOMMU support
+
 
 
 Build and Installation Procedure