document riscv64 support in INSTALL document

[android-x86/external-musl-libc.git] / INSTALL

diff --git a/INSTALL b/INSTALL
index 9f33910..dbe25a7 100644 (file)
--- a/INSTALL
+++ b/INSTALL
@@ -62,13 +62,27 @@ and ABI combinations:
     * MIPS2 or later, or kernel emulation of ll/sc (standard in Linux)
       is required
 
+* MIPS64
+    * ABI is n64 (LP64)
+    * Big-endian default; little-endian variants also supported
+    * Default ABI variant uses FPU registers; alternate soft-float ABI
+      that does not use FPU registers or instructions is available
+
 * PowerPC
-    * Only 32-bit is supported
     * Compiler toolchain must provide 64-bit long double, not IBM
       double-double or IEEE quad
     * For dynamic linking, compiler toolchain must be configured for
       "secure PLT" variant
 
+* PowerPC64
+    * Both little and big endian variants are supported
+    * Compiler toolchain must provide 64-bit long double, not IBM
+      double-double or IEEE quad
+    * Compiler toolchain must use the new (ELFv2) ABI regardless of
+      whether it is for little or big endian
+
+* S390X (64-bit S390)
+
 * SuperH (SH)
     * Standard ELF ABI or FDPIC ABI (shared-text without MMU)
     * Little-endian by default; big-engian variant also supported
@@ -82,6 +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