Documentation updates to mention 64-bit mode and x86_64 port

2 files changed, 32 insertions, 7 deletions

diff --git a/Changelog b/Changelog
index c3edb0fd..59f10c2f 100644
--- a/Changelog
+++ b/Changelog
@@ -1,3 +1,25 @@
+Working version
+===============
+
+Major improvements:
+
+- Added support for 64-bit target platforms, including pointers that
+  are 64-bit wide, and the ability to use 64-bit integer registers and
+  arithmetic operations.  This support does not replace but comes in
+  addition to CompCert's original support for 32-bit target platforms,
+  with 32-bit pointers and emulation of 64-bit integer arithmetic
+  using pairs of 32-bit integers.  In terms of C data models, CompCert
+  used to be restricted to the ILP32LL64 model; now it also supports
+  I32LP64 and IL32LLP64.
+
+- The x86 port of CompCert was extended to produce x86-64 bit code in
+  addition to the original x86-32 bit (IA32) code.  (This is the first
+  instantiation of the new support for 64-bit targets described
+  above.) Support for x86-64 is currently available for Linux and MacOS X.
+  (Run the configure script with 'x86_64-linux' or 'x86_64-macosx'.)
+
+
+
 Release 2.7.1, 2016-07-18
 =========================
 
@@ -7,9 +29,9 @@ Bug fixing:
 - Fixed a compile-time assertion failure involving builtins
   taking a 64-bit integer parameter and given an unsigned 32-bit integer
   argument.
-- Updates to the Cminor parser.	
+- Updates to the Cminor parser.
+
 
-	
 Release 2.7, 2016-06-29
 =======================
 
diff --git a/configure b/configure
index 6db59fb8..7ce5a1f2 100755
--- a/configure
+++ b/configure
@@ -36,13 +36,16 @@ Supported targets:
   armeb-linux          (ARM, EABI, big endian)
   armeb-eabihf         (ARM, EABI using hardware FP registers, big endian)
   armeb-hardfloat      (ARM, EABI using hardware FP registers, big endian)
-  ia32-linux           (x86 32 bits, Linux)
-  ia32-bsd             (x86 32 bits, BSD)
-  ia32-macosx          (x86 32 bits, MacOS X)
-  ia32-cygwin          (x86 32 bits, Cygwin environment under Windows)
+  x86_32-linux         (x86 32 bits, Linux)
+  x86_32-bsd           (x86 32 bits, BSD)
+  x86_32-macosx        (x86 32 bits, MacOS X)
+  x86_32-cygwin        (x86 32 bits, Cygwin environment under Windows)
   x86_64-linux         (x86 64 bits, Linux)
+  x86_64-macosx        (x86 64 bits, MacOS X)
   manual               (edit configuration file by hand)
 
+For x86 targets, the "x86_32-" prefix can also be written "ia32-".
+
 For PowerPC targets, the "ppc-" prefix can be refined into:
   ppc64-               PowerPC 64 bits
   e5500-               Freescale e5500 core (PowerPC 64 bit, EREF extensions)
@@ -314,7 +317,7 @@ if test "$arch" = "x86" -a "$bitsize" = "32"; then
         fi
         ;;
     *)
-        echo "Error: invalid eabi/system '$target' for architecture IA32." 1>&2
+        echo "Error: invalid eabi/system '$target' for architecture IA32/X86_32." 1>&2
         echo "$usage" 1>&2
         exit 2;;
   esac