Commit Graph

27 Commits

Author SHA1 Message Date
grischka
3b84e61ead Revert "partial revert of the commit 4ad186c5ef61"
There seems nothing wrong.  With

    int t1 = 176401255;
    float f = 0.25;
    int t2 = t1 * f; // 176401255 * 0.25 = 44100313.75

according to the arithmetic conversion rules, the number
176401255 needs to be converted to float, and the compiler
can choose either the nearest higher or nearest lower
representable number "in an implementation-defined manner".

Which may be 176401248 or 176401264.  So as result both
44100312 and 44100313 are correct.

This reverts commit 664c19ad5e.
2017-02-05 14:30:19 +01:00
Michael Matz
3db037387c libtcc1: Don't use stdlib functions
libtcc1 is the compiler support library and therefore needs
to function in a freestanding environment.  In particular
it can't just use fprintf or stderr, which it was on x86-64
(but only when compiled by GCC).  The tight integration between
libtcc1 and tcc itself makes it impossible to ever reach that
case so the abort() there is enough.  abort() is strictly speaking
also not available in a freestanding environment, but it often is
nevertheless.
2016-12-15 17:49:56 +01:00
grischka
02642bc94c lib/libtcc1.c: cleanup
- remove #include dependencies from libtcc1.c
  for easier cross compilation
- clear_cache only on ARM
- error-message for mprotect failure
2016-10-19 19:21:36 +02:00
Edmund Grimley Evans
f7dd3d49cc lib/libtcc1.c: Replace "long" with "unsigned int" in union float_long. 2015-11-04 23:22:00 +00:00
Edmund Grimley Evans
eafd7a7d3b Correct prototype: void __clear_cache(void *, void *). 2015-10-15 19:02:54 +01:00
gus knight
89ad24e7d6 Revert all of my changes to directories & codingstyle. 2015-07-29 16:57:12 -04:00
gus knight
41031221c8 Trim trailing spaces everywhere. 2015-07-27 12:43:40 -04:00
Michael Matz
25b2779c3d x86-64: Fix stdarg for large non-float structs
Some structs are passed in registers.  When they need more than
one the implementation of __va_arg on x86-64 didn't correctly account
for this.  This fixes only the cases where the structs consist of
integer types, as there the register save area is consecutive.

Fixes some tests from 73_arm64.c, but still leaves those failing
that use floating point in the large-but-regpassed structs.
2015-03-09 03:54:33 +01:00
seyko
664c19ad5e partial revert of the commit 4ad186c5ef
A test program:

    /* result of the new version inroduced in 4ad186c5ef: t2a = 44100312 */
    #include<stdio.h>
    int main() {
	int t1 = 176401255;
	float f = 0.25f;
	int t2a = (int)(t1 * f); // must be 44100313
	int t2b = (int)(t1 * (float)0.25f);
	printf("t2a=%d t2b=%d \n",t2a,t2b);
	return 0;
    }
2015-03-04 16:25:51 +03:00
seyko
7f36abd3f2 x86_64-tcc and libtcc1.c: size_t definition is needed for a x86_64-tcc to parse memset() 2015-03-03 16:29:00 +03:00
mingodad
c025478d7c New implementation of va_list/va_start/var_copy that do not use dynamic memory, with this when compiling fossil-scm with tcc on linux X86_64 it works fine. 2014-03-28 20:28:19 +00:00
Thomas Preud'homme
40e3859739 Fix __clear_cache implementation
Forgot to give the parameters to syscall function, doh!
2014-03-11 22:57:22 +08:00
Thomas Preud'homme
98afe11c85 Use intptr_t to cast pointer 2014-03-09 22:22:43 +08:00
Thomas Preud'homme
73ac39c317 Undefine __va* in libtcc1 to avoid errors w/ clang 2014-03-09 22:22:21 +08:00
Thomas Preud'homme
e50f08faa1 Make condition in libtcc1 based on target
Prior to this commit runtime library was compiled according to the host
because of the macro used to detec what architecture to choose. This
commit fixes this by using the TARGET_* macro instead.
2014-03-09 22:15:01 +08:00
grischka
4ad186c5ef i386: use __fixdfdi instead of __tcc_cvt_ftol
Variants __fixsfdi/__fixxfdi are not needed for now because
the value is converted to double always.

Also:
- remove __tcc_fpinit for unix as it seems redundant by the
  __setfpucw call in the startup code
- avoid reference to s->runtime_main in cross compilers
- configure: fix --with-libgcc help
- tcctok.h: cleanup
2014-01-06 19:07:08 +01:00
Thomas Preud'homme
fbb4841606 Add __clear_cache implementation in libtcc1
Add __clear_cache function for flushing caches to libtcc1.
2013-11-05 19:29:43 +08:00
Ramsay Jones
235a65033f libtcc1.c: Fix __asm__() in __tcc_fpinit and __tcc_cvt_ftol
Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
2013-09-09 23:59:09 +02:00
grischka
73faaea227 i386-gen: preserve fp control word in gen_cvt_ftoi
- Use runtime function for conversion
- Also initialize fp with tcc -run on windows

This fixes a bug where
  double x = 1.0;
  double y = 1.0000000000000001;
  double z = x < y ? 0 : sqrt (x*x - y*y);
caused a bad sqrt because rounding precision for the x < y comparison
was different to the one used within the sqrt function.

This also fixes a bug where
  printf("%d, %d", (int)pow(10, 2), (int)pow(10, 2));
would print
  100, 99

Unrelated:
  win32: document relative include & lib lookup
  win32: normalize_slashes: do not mirror silly gcc behavior
  This reverts part of commit 8a81f9e103
  winapi: add missing WINAPI decl. for some functions
2013-08-28 22:55:05 +02:00
James Lyon
6ee366e765 Fixed x86-64 long double passing.
long double arguments require 16-byte alignment on the stack, which
requires adjustment when the the stack offset is not an evven number of
8-byte words.
2013-04-26 16:42:12 +01:00
James Lyon
1caee8ab3b Sorted out CMake on x86-64 and fixed silly XMM# bug introduced when working on Win64 stdargs.
I removed the XMM6/7 registers from the register list because they are not used
on Win64 however they are necessary for parameter passing on x86-64. I have now
restored them but not marked them with RC_FLOAT so they will not be used except
for parameter passing.
2013-04-25 22:30:53 +01:00
James Lyon
e7a7efed11 Added cross compilation to CMake build system.
Brings it more into line with make based system. I've tested on 32- and 64-bit
Windows, but not yet Linux.
2013-04-25 01:08:18 +01:00
Thomas Preud'homme
6ed6a36a51 Flush caches before -running program
On some architectures, ARM for instance, the data and instruction caches
are not coherent with each other. This is a problem for the -run feature
since instructions are written in memory, and are thus written in the
data cache first and then later flushed to the main memory. If the
instructions are executed before they are pushed out of the cache, then
the processor will fetch the old content from the memory and not the
newly generated code. The solution is to flush from the data cache all
the data in the memory region containing the instructions and to
invalidate the same region in the instruction cache.
2013-03-18 10:08:39 +01:00
Urs Janssen
cec76c8b8a - document -dumpversion
- fixed a broken prototype
2013-02-15 12:48:33 +01:00
grischka
762a43877b configure: pass CONFIG_xxxDIR/PATH options via commandline
- except for CONFIG_SYSROOT and CONFIG_TCCDIR

Strictly neccessary it is only for CONFIG_MULTIARCHDIR
because otherwise if it's in config.h it is impossible to
leave it undefined.

But it is also nicer not to use these definitions for
cross-compilers.

- Also:
lib/Makefile : include ../Makefile for CFLAGS
lib/libtcc1.c : fix an issue compiling tcc with tcc on x64
2013-02-14 17:43:24 +01:00
Shinichiro Hamaji
0ed7ba3f5e Support struct arguments with stdarg.h
- add __builtin_va_arg_types to check how arguments were passed
- move most code of stdarg into libtcc1.c
- remove __builtin_malloc and __builtin_free
- add a test case based on the bug report
  (http://www.mail-archive.com/tinycc-devel@nongnu.org/msg03036.html)
2010-12-28 19:32:40 +09:00
grischka
ea5e81bd6a new subdirs: include, lib, tests 2009-04-18 15:08:03 +02:00