git.sur5r.net Git

uz [Mon, 31 Aug 2009 17:15:59 +0000 (17:15 +0000)]

Fixed a few C99isms that prevented the sources to compile with Watcom-C.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4099 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Mon, 31 Aug 2009 16:48:45 +0000 (16:48 +0000)]

Fixed a copy&paste error in a comment.

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uz [Mon, 31 Aug 2009 15:11:32 +0000 (15:11 +0000)]

Improved code for bit fields.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4097 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Mon, 31 Aug 2009 14:59:49 +0000 (14:59 +0000)]

Improved the code generated for bit-fields.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4096 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Mon, 31 Aug 2009 13:18:49 +0000 (13:18 +0000)]

Add a warning if a function returning something does not contain a return
statement.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4095 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Mon, 31 Aug 2009 12:56:54 +0000 (12:56 +0000)]

The pleasp.s module is no longer in use.

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uz [Mon, 31 Aug 2009 12:41:38 +0000 (12:41 +0000)]

Added info about changed leaa0sp and leaaxsp. Rewrote g_leasp to cope with 16
stack offsets, because it's rather easy in this case.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4093 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Mon, 31 Aug 2009 12:22:13 +0000 (12:22 +0000)]

Oh well. Decided to throw away the separate implementation for leaa0sp,
because it's not used too much, may sometimes inlined and can easily be
replaced by another entry in leaaxsp.s

git-svn-id: svn://svn.cc65.org/cc65/trunk@4092 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Mon, 31 Aug 2009 12:15:51 +0000 (12:15 +0000)]

Renamed leaasp.s again, this time to leaa0sp.s. Added a new module leaaxsp.s.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4091 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Mon, 31 Aug 2009 12:10:59 +0000 (12:10 +0000)]

Renamed leasp.s to leaasp.s

git-svn-id: svn://svn.cc65.org/cc65/trunk@4090 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Sun, 30 Aug 2009 09:01:04 +0000 (09:01 +0000)]

For bit fields contained within single bytes, try to do character operations
instead of word sized ops.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4089 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Sun, 30 Aug 2009 08:37:21 +0000 (08:37 +0000)]

Use CHAR_BITS instead of a hardcoded 8 bits/byte.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4088 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Sun, 30 Aug 2009 08:36:56 +0000 (08:36 +0000)]

Make the SIZEOF_XXX constants resolve to unsigned values.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4087 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Sun, 30 Aug 2009 08:30:55 +0000 (08:30 +0000)]

Any field without a name is legal but useless in a union.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4086 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Sun, 30 Aug 2009 08:28:16 +0000 (08:28 +0000)]

Separate the functions that parse unions and structs, because they became too
different.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4085 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Sun, 30 Aug 2009 07:55:21 +0000 (07:55 +0000)]

Missing resp. ignored "volatile".

git-svn-id: svn://svn.cc65.org/cc65/trunk@4084 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Sat, 29 Aug 2009 23:19:01 +0000 (23:19 +0000)]

Added even more subroutines to the "harmless calls" list.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4083 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Sat, 29 Aug 2009 22:03:41 +0000 (22:03 +0000)]

Few small changes. Started a new section about implementation-defined
behavior.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4082 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Sat, 29 Aug 2009 21:58:06 +0000 (21:58 +0000)]

Code improvements

git-svn-id: svn://svn.cc65.org/cc65/trunk@4081 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Sat, 29 Aug 2009 21:32:14 +0000 (21:32 +0000)]

Rewrote the paragraph about compiler limits and standard compliance.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4080 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Sat, 29 Aug 2009 21:20:13 +0000 (21:20 +0000)]

First implementation of bit fields.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4079 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Sat, 29 Aug 2009 21:17:28 +0000 (21:17 +0000)]

Added more harmless functions to the list, so the stuff gets applied in more
cases.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4078 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Sat, 29 Aug 2009 20:16:52 +0000 (20:16 +0000)]

Improved code for shifts.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4077 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Sat, 29 Aug 2009 20:14:20 +0000 (20:14 +0000)]

The shift long by 4 functions do also destroy Y.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4076 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Sat, 29 Aug 2009 20:04:18 +0000 (20:04 +0000)]

Info for long shift functions was missing or wrong.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4075 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Sat, 29 Aug 2009 19:05:01 +0000 (19:05 +0000)]

Fix wrong check for typedef which caused non allocation of storage for structs
after the latest changes.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4074 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Sat, 29 Aug 2009 19:04:21 +0000 (19:04 +0000)]

Rename Width to BitWidth.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4073 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Sat, 29 Aug 2009 17:38:53 +0000 (17:38 +0000)]

Added code to parse bit fields and enter them into the symbol table. They're
not supported in code generation until now.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4072 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Sat, 29 Aug 2009 11:31:28 +0000 (11:31 +0000)]

Another tiny code improvement for integer compares.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4071 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Sat, 29 Aug 2009 11:31:06 +0000 (11:31 +0000)]

Fixed a problem with local variables (stack offset for RHS was not corrected).

git-svn-id: svn://svn.cc65.org/cc65/trunk@4070 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Sat, 29 Aug 2009 10:54:59 +0000 (10:54 +0000)]

Just comment and formatting changes.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4069 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Fri, 28 Aug 2009 21:34:28 +0000 (21:34 +0000)]

Change mode constants for ParseDecl to an enum.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4068 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Fri, 28 Aug 2009 21:03:17 +0000 (21:03 +0000)]

Reorder optimimization steps to get better results.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4067 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Fri, 28 Aug 2009 19:34:35 +0000 (19:34 +0000)]

Added more code to improve compares.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4066 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Fri, 28 Aug 2009 17:38:24 +0000 (17:38 +0000)]

Fixed a bug introduced by recent changes.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4065 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Fri, 28 Aug 2009 17:21:58 +0000 (17:21 +0000)]

Increase count to 16384. Simplify complex expression.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4064 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Fri, 28 Aug 2009 16:32:58 +0000 (16:32 +0000)]

Changed code generated for compares. Fixed bugs in OptStackOps. Still
generates wrong code in at least one place.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4063 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Fri, 28 Aug 2009 13:44:03 +0000 (13:44 +0000)]

Change code generated for compares for special cases.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4062 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Fri, 28 Aug 2009 10:23:19 +0000 (10:23 +0000)]

Added -u as an alias for --force-import. Updated command line option infos in
the cl65 and ld65 docs.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4061 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Fri, 28 Aug 2009 09:29:11 +0000 (09:29 +0000)]

Relax the precondition for OPtStackOps somewhat.

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uz [Thu, 27 Aug 2009 22:09:46 +0000 (22:09 +0000)]

When preprocessing, all compares evaluate to constants, so don't print a
warning in this case.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4059 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Thu, 27 Aug 2009 22:07:28 +0000 (22:07 +0000)]

Added better code to replace tossubax.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4058 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Thu, 27 Aug 2009 22:00:18 +0000 (22:00 +0000)]

Added a warning if the result of a compare operation is constant. This should
protect against missing parenthesis like in (si & 0x7F == 0). Hopefully
without too many false positives.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4057 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Thu, 27 Aug 2009 16:59:26 +0000 (16:59 +0000)]

Try to generate more predicable code. clc always before adc or sbc.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4056 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Thu, 27 Aug 2009 16:38:27 +0000 (16:38 +0000)]

Check for usage of Y instead of reloading it. The latter will destroy the
flags from load of A.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4055 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Thu, 27 Aug 2009 16:13:17 +0000 (16:13 +0000)]

Fixed a problem with OptPtrLoad6 (must correct stack pointer).

git-svn-id: svn://svn.cc65.org/cc65/trunk@4054 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Thu, 27 Aug 2009 15:30:52 +0000 (15:30 +0000)]

Added the --force-import option also to the cl65 utility.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4053 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Thu, 27 Aug 2009 14:43:44 +0000 (14:43 +0000)]

Added a new "--force-import" command line option to the linker.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4052 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Thu, 27 Aug 2009 14:19:47 +0000 (14:19 +0000)]

Use the new AddrSizeFromStr function.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4051 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Thu, 27 Aug 2009 14:11:07 +0000 (14:11 +0000)]

Added an AddrSizeFromStr function.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4050 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Sun, 23 Aug 2009 21:40:36 +0000 (21:40 +0000)]

Fixed two more function that didn't clear the high byte of the function result.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4049 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Sun, 23 Aug 2009 21:38:11 +0000 (21:38 +0000)]

Fixed an error in cbm_k_save (on which cbm_save is based): The X register was
not cleared on return.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4048 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Thu, 20 Aug 2009 21:01:01 +0000 (21:01 +0000)]

Disable handling of tossubax since it won't work as implemented in many cases.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4047 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Thu, 20 Aug 2009 16:06:20 +0000 (16:06 +0000)]

Added several constraints to the optimizer functions to avoid breaking code.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4046 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Thu, 20 Aug 2009 10:55:38 +0000 (10:55 +0000)]

Fixed a bug reported by Greg King: Initialized data for constant arrays was
not placed in the RODATA but in the DATA segment.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4044 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Wed, 19 Aug 2009 14:51:16 +0000 (14:51 +0000)]

Special cased the division 16 by 8.

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uz [Wed, 19 Aug 2009 13:36:26 +0000 (13:36 +0000)]

Also handle ldaxysp as a valid load insn before a push.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4042 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Wed, 19 Aug 2009 13:20:28 +0000 (13:20 +0000)]

Inline the left shift routines.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4041 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Wed, 19 Aug 2009 12:47:30 +0000 (12:47 +0000)]

Apply OptTransfers3 again in a later step, so it gets another chance.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4040 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Wed, 19 Aug 2009 10:17:10 +0000 (10:17 +0000)]

Generate more predictable code.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4039 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Wed, 19 Aug 2009 10:14:14 +0000 (10:14 +0000)]

Add an additional precondition check for safety.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4038 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Tue, 18 Aug 2009 15:10:15 +0000 (15:10 +0000)]

Serval improvements, handling of tossubax.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4037 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Mon, 17 Aug 2009 20:48:28 +0000 (20:48 +0000)]

Greatly improved multiplication routine. Optimized the generic 16x16 one and
added special cases for 8x16 and 8x8. The former is directly called by the
compiler as tosmula0 and tosumula0 resp.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4036 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Mon, 17 Aug 2009 20:37:36 +0000 (20:37 +0000)]

Added a multiplication test program.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4035 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Mon, 17 Aug 2009 16:25:54 +0000 (16:25 +0000)]

Change order of insns in generated sequence in OptPtrLoad17.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4034 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Mon, 17 Aug 2009 16:23:29 +0000 (16:23 +0000)]

Added/corrected code info.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4033 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Mon, 17 Aug 2009 12:52:50 +0000 (12:52 +0000)]

Rewrite of the main function.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4032 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Sun, 16 Aug 2009 23:37:09 +0000 (23:37 +0000)]

Change order, so that the forced imports for main() go into the global
segments and not the one for main().

git-svn-id: svn://svn.cc65.org/cc65/trunk@4031 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Sun, 16 Aug 2009 21:01:16 +0000 (21:01 +0000)]

Use correct adddressing mode for "asl a".

git-svn-id: svn://svn.cc65.org/cc65/trunk@4030 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Sun, 16 Aug 2009 20:56:33 +0000 (20:56 +0000)]

Some more pattern replacements.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4029 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Sun, 16 Aug 2009 19:23:07 +0000 (19:23 +0000)]

Output an apropriate error message when a floating point type is encountered
(instead of an internal compiler error).

git-svn-id: svn://svn.cc65.org/cc65/trunk@4028 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Sun, 16 Aug 2009 16:38:52 +0000 (16:38 +0000)]

Added an entry point that clears the high word of rhs.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4027 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Sun, 16 Aug 2009 16:38:25 +0000 (16:38 +0000)]

Added more function info

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uz [Sat, 15 Aug 2009 21:06:06 +0000 (21:06 +0000)]

More entry points for long ops that clear the high word of the lhs.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4025 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Sat, 15 Aug 2009 21:00:27 +0000 (21:00 +0000)]

Check also sreg in OptSize1. Added information about shortcut functions for
longs that clear the high word of the right operand on entry.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4024 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Sat, 15 Aug 2009 20:58:35 +0000 (20:58 +0000)]

Added additional entry points that clear the high word of the right operand.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4023 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Sat, 15 Aug 2009 16:49:46 +0000 (16:49 +0000)]

Fixed wrong insertion order that caused problems with labels.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4022 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Sat, 15 Aug 2009 16:45:02 +0000 (16:45 +0000)]

Fixed wrong insertion order that caused problems with labels.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4021 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Sat, 15 Aug 2009 16:00:30 +0000 (16:00 +0000)]

clc should always be the insn before adc.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4020 b7a2c559-68d2-44c3-8de9-860c34a00d81

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uz [Sat, 15 Aug 2009 15:58:21 +0000 (15:58 +0000)]

Some branch improvements.

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uz [Sat, 15 Aug 2009 15:27:43 +0000 (15:27 +0000)]

Inline some forms of aslax1

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uz [Sat, 15 Aug 2009 14:43:59 +0000 (14:43 +0000)]

Fixed an error

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uz [Sat, 15 Aug 2009 14:20:26 +0000 (14:20 +0000)]

Replace ldaxidx by inline code.

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uz [Sat, 15 Aug 2009 14:18:00 +0000 (14:18 +0000)]

Add more function to the "harmless calls" list.

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uz [Sat, 15 Aug 2009 13:42:40 +0000 (13:42 +0000)]

Minor improvement in last change

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uz [Sat, 15 Aug 2009 13:25:40 +0000 (13:25 +0000)]

Try to generate more predictable code.

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uz [Sat, 15 Aug 2009 13:16:56 +0000 (13:16 +0000)]

Remove even more transfer instructions.

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uz [Sat, 15 Aug 2009 12:49:15 +0000 (12:49 +0000)]

Remove unnecessary transfer instructions.

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uz [Sat, 15 Aug 2009 10:27:41 +0000 (10:27 +0000)]

Remove more push/pop sequences.

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uz [Sat, 15 Aug 2009 10:14:04 +0000 (10:14 +0000)]

Change order of replacement code in OptPtrLoad10 to allow detection in other
steps.

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uz [Sat, 15 Aug 2009 09:08:03 +0000 (09:08 +0000)]

Use __asm__() instead of asm().

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uz [Fri, 14 Aug 2009 22:17:47 +0000 (22:17 +0000)]

Don't generate inlined codes for integers shifts. If necessary the optimizer
can do that.

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uz [Fri, 14 Aug 2009 22:10:04 +0000 (22:10 +0000)]

Don't generate short code for the tosxxx functions when X is zero or similar.
Let the optimizer do it. This reduces the number of possible patterns that
must be detected by the optimizer. Add tosicmp0 as a shortcut function.

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uz [Fri, 14 Aug 2009 22:08:28 +0000 (22:08 +0000)]

Added tosicmp0, a special entry point that clears the X register.

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uz [Fri, 14 Aug 2009 20:21:47 +0000 (20:21 +0000)]

Tell the compiler more about the runtime library functions.

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uz [Fri, 14 Aug 2009 18:32:11 +0000 (18:32 +0000)]

Removed debug code

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uz [Fri, 14 Aug 2009 18:23:29 +0000 (18:23 +0000)]

Do size improvements always if they have no impact on speed.

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uz [Fri, 14 Aug 2009 17:28:32 +0000 (17:28 +0000)]

Improvements in array index code.

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uz [Fri, 14 Aug 2009 17:09:24 +0000 (17:09 +0000)]

Moved part of codeopt into coptptrload for better modularization.

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uz [Thu, 6 Aug 2009 20:27:19 +0000 (20:27 +0000)]

Fix definition for CIA (Stefan Haubenthal).

git-svn-id: svn://svn.cc65.org/cc65/trunk@3999 b7a2c559-68d2-44c3-8de9-860c34a00d81

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