Corrected subject to reflect actual release number; content unchanged. Peter
On Mon, Jul 16, 2012 at 3:39 PM, Peter Bigot <big...@acm.org> wrote: > Development release 20120716 of mspgcc is now available. > > This is a development release. It is beta-quality. It provides full > support for 20-bit code and data, with all memory models. So please be > adventurous, download it or checkout the workspace, and try it. > > The sole documentation for 20-bit use is at: > > > https://sourceforge.net/apps/mediawiki/mspgcc/index.php?title=Gcc47:20-Bit_Design > > The page has been updated with this release. > > As of this version, there are no known bugs related to 20-bit mode. All > memory models should work. All optimizations and features intended for this > development phase have been completed. Subsequent changes should be for bug > fixes only. In anticipation of an upcoming LTS release, it is likely that > 20120716 will be made the default for mspgcc download sometime in the next > week. > > The following key fixes have been made since 20120627: > > * Large memory model compilations now disable GCC's induction variable > optimization, because that optimization makes assumptions that are not > satisfied by the memory model. The impact is likely to be relatively > small, as all other optimizations remain enabled. > > * The __even_in_range() intrinsic is now recognized by the compiler. Other > compatibility definitions have been added also, reducing source > incompatibility with IAR and CCS software. > > * Extended-mode instructions are avoided in cases where they are not > necessary to achieve 20-bit support, in particular when manipulating > peripheral registers in applications with -md20. > > * msp430-libc has been extended with basic POSIX-style time management > capabilities. > > * A likely resolution to the issue of Fraunchpad boards claiming an > electronic "fuse blown" problem has been identified and implemented. > > The following known limitations are present: > > * All the 20-bit features were intended to be controlled through type and > declaration attributes, with default settings controlled by compiler > flags. While this is still how it is implemented, gcc is not prepared to > deal with the sort of mixed pointers that individual control enables. > See > > https://sourceforge.net/apps/mediawiki/mspgcc/index.php?title=Gcc47:20-Bit_Design#Warning_about_Mixing_Memory_Models, > and stick to the pre-defined memory models. > > * DWARF2 data for CPUX MCUs now uses 32 bits for addresses instead of 16 > bits. This enables building application with -ggdb when 20-bit addresses > are present. However, gdb has not been updated to recognize this change, > and gdb on CPUX MCUs is probably no longer usable. > > * All testing has been done on toy programs, almost entirely with -Os. > Real applications and other optimization flags may produce errors. > > The patch bundle for 20120716 is available at: > > https://sourceforge.net/projects/mspgcc/files/mspgcc/DEVEL-4.7.x > > The tag workspace/release/20120716 in > git://mspgcc.git.sourceforge.net/gitroot/mspgcc/mspgcc checks out a > workspace configured for this release. The tag workspace/master checks out > a workspace configured for the development series. > > Downstream packagers: If you bundle this, please mark it as experimental. > The stable series remains LTS-20120406. > > As usual, please submit problems as tracker tickets at: > https://sourceforge.net/tracker/?group_id=42303&atid=432701 > > Summary of changes in mspgcc release 20120716 since release 20120627 > > binutils: changes from binutils-2.22-20120627 to binutils-2.22-20120716: > - 9bae3ae [2012-07-16 14:32:05 -0500] Update DEV-PHASE for release > - 1a0ef3d [2012-07-07 17:52:29 -0500] SF 3541237 truncated address in > disassembled jmp > - 0876ac8 [2012-07-02 06:28:15 -0500] Back-port upstream patch. > > gcc: changes from gcc-4.7.0-20120627 to gcc-4.7.0-20120716: > - 58c8933 [2012-07-16 14:31:37 -0500] Update DEV-PHASE for release > - fb2facd [2012-07-16 14:30:41 -0500] Update for release > - b1dc3cd [2012-07-15 06:25:05 -0500] SF 3544338 large memory model > induction variable optimization broken > - 0594213 [2012-07-12 14:32:16 -0500] SF 3540953 fram applications > overwrite bsl/jtag passwords > - 9584b95 [2012-07-09 15:19:38 -0500] Stub __even_in_range intrinsic > - dec1bc2 [2012-07-09 14:36:43 -0500] Pre-check expectations of > MEM_VOLATILE_P > - a7873c4 [2012-07-07 12:39:02 -0500] SF 3541056 inefficient access > through 20-bit pointers > - 3de8c1b [2012-07-07 11:59:25 -0500] Fix region selected for function rodata > - 9e935a26 [2012-07-06 14:10:02 -0500] SF 3539829 long argument > performance degraded compared to mspgcc4 > - dfb6de7 [2012-07-06 10:30:53 -0500] SF 3539033 AND optimization to > BIC not optimal > - 85e86a1 [2012-07-04 13:58:03 -0500] SF 3540458 optimize peripheral > address size > - 5b1196c [2012-07-04 12:12:56 -0500] Detect conflicting type attributes > - e5dce1b [2012-07-04 12:01:26 -0500] Refactor replacement of type > node when attribute added > > gdb: no changes > > msp430-libc: changes from msp430libc-20120627 to msp430libc-20120716: > - 292e920 [2012-07-16 14:32:41 -0500] Regenerate > - d50f4ff [2012-07-16 14:32:41 -0500] Update version number and release notes > - 9a44e06 [2012-07-15 07:44:20 -0500] Regenerate > - eac45cd [2012-07-15 07:44:14 -0500] Separate asctime and > ?ettimeofday from time > - c4b05a8 [2012-07-09 14:50:51 -0500] Regenerate > - 6e9e818 [2012-07-09 13:15:39 -0500] SF 3383730 STDLIB time.h > - 3c72745 [2012-07-09 13:26:40 -0500] Implement gettimeofday/settimeofday > - a120a6b [2012-07-09 12:43:32 -0500] Implement asctime using strftime > - 0964c55 [2012-07-09 12:43:12 -0500] Update to suit msp430-libc needs > - ae749b2 [2012-07-09 11:39:06 -0500] Rip out material inappropriate > for msp430-libc > - 03024b2 [2012-07-09 11:01:17 -0500] Implement time(3p) > - 6803eca [2012-07-09 09:40:53 -0500] Refactor sys/time.h header to > meet msp430-libc needs > - cfda704 [2012-07-09 08:52:57 -0500] Refactor time.h header to meet > msp430-libc needs > - 6620e2b [2012-07-09 12:53:21 -0500] Import time-related functions from BSD > - d54472c [2012-07-09 07:44:53 -0500] Correct definition of NULL > - d30f3c6 [2012-07-06 19:49:41 -0500] Remove unreferenced/outdated include > file > - f4fa0ee [2012-07-03 10:11:00 -0500] SF 3539758 xtoa wastes space > - 75e0304 [2012-07-03 05:29:44 -0500] Regenerate > - e74645d [2012-07-03 05:29:34 -0500] Independently control 20-bit > and 32-bit printf support > > msp430mcu: changes from msp430mcu-20120627 to msp430mcu-20120716: > - 5e7c08c [2012-07-16 14:33:26 -0500] Regenerate > - c2cc549 [2012-07-16 14:33:17 -0500] Update version number and release notes > - 8de3eb5 [2012-07-15 07:23:55 -0500] Regenerate > - 6d53d4c [2012-07-15 07:23:25 -0500] Simplify support for optimized > pointers to peripheral registers > - 78925f9 [2012-07-10 04:55:40 -0500] Regenerate > - 6273ec8 [2012-07-09 15:28:43 -0500] SF 3211744 provide > msp430generic and msp430xgeneric > - ffe34f9 [2012-07-09 15:04:41 -0500] Add aliases for CCS intrinsics > - e418f28 [2012-07-05 16:04:52 -0500] Regenerate > - 1f77abb [2012-07-04 13:59:12 -0500] Add d16 attribute to peripheral > register declaration types ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. 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