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* Unbreak the build for arm and powerpc.David Schultz2008-04-122-0/+3
| | | | | | | Pointy hat to yours truly. Notes: svn path=/head/; revision=178154
* Make several changes to the way printf handles hex floating point (%a):David Schultz2008-04-123-207/+206
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | 1. Previously, printing the number 1.0 could produce 0x1p+0, 0x2p-1, 0x4p-2, or 0x8p-3, depending on what happened to be convenient. This meant that printing a value as a double and printing the same value as a long double could produce different (but equivalent) results. The change is to always make the leading digit a 1, unless the number is 0. This solves the aforementioned problem and has several other advantages. 2. Use the FPU to do rounding. This is far simpler and more portable than manipulating the bits, and it fixes an obsure round-to-even bug. It also raises the exceptions now required by IEEE 754R. The drawbacks are that it is usually slightly slower, and it makes printf less effective as a debugging tool when the FPU is hosed (e.g., due to a buggy softfloat implementation). 3. On i386, twiddle the rounding precision so that (2) works properly for long doubles. 4. Make several simplifications that are now possible due to (2). 5. Split __hldtoa() into a separate file. Thanks to remko for access to a sparc64 box for testing. Notes: svn path=/head/; revision=178140
* Export gdtoa's __ULto{x,Q}_D2A routine in a private namespace soDavid Schultz2007-12-161-0/+5
| | | | | | | libm can use it. Notes: svn path=/head/; revision=174681
* Fix handling of subnormals on i386/ia64/amd64.David Schultz2007-12-091-2/+0
| | | | | | | PR: 85080 Notes: svn path=/head/; revision=174488
* In scanf, round according to the current rounding mode.David Schultz2007-12-033-4/+16
| | | | Notes: svn path=/head/; revision=174204
* Use an intermediate pointer to avoid a strict aliasing warning.John Birrell2007-11-211-1/+2
| | | | | | | | | Note that ULong in this code is actually defined as an unsigned integer across all arches so that the gdtoa() function always processes 32 bit data despite the unfortunate naming of "ULong". Notes: svn path=/head/; revision=173793
* Remove symbols that should not be exported.Daniel Eischen2007-10-131-29/+0
| | | | | | | | Submitted by: das MFC after re@ approval Notes: svn path=/head/; revision=172618
* Fix a rounding error.David Schultz2007-05-081-1/+1
| | | | | | | Reported by: Bruno Haible Notes: svn path=/head/; revision=169354
* Use C comments since we now preprocess these files with CPP.Daniel Eischen2007-04-291-4/+8
| | | | Notes: svn path=/head/; revision=169092
* Fix rounding of 0xf for hex fp formats.David Schultz2007-01-031-1/+1
| | | | | | | PR: 90333 Notes: svn path=/head/; revision=165742
* Don't export __gdtoa. The only known ports that rely onDaniel Eischen2006-04-151-5/+1
| | | | | | | | | | this or the deprecated POSIX functions {e,g,f}cvt() have newer versions that do not (rely on them). Requested by: marius Notes: svn path=/head/; revision=157777
* Add __gdtoa to the list of FreeBSD private symbols. Unfortunately,Daniel Eischen2006-04-011-0/+4
| | | | | | | | | | | this is used by some 3rd party applications when {e,f,g}cvt() are not found. POSIX defines the xcvt() funtions but says they are deprecated in favor or sprintf(). We'll import these functions from OpenBSD and remove __gdtoa() from the exported interfaces when libc version is bumped. Notes: svn path=/head/; revision=157350
* Add each directory's symbol map file to SYM_MAPS.Daniel Eischen2006-03-131-0/+2
| | | | Notes: svn path=/head/; revision=156613
* Add symbol maps and initial symbol version definitions to libc.Daniel Eischen2006-03-131-0/+39
| | | | | | | Reviewed by: davidxu Notes: svn path=/head/; revision=156608
* Don't compile the gdtoa package's strtoIg.c into libc.David Schultz2005-01-271-1/+1
| | | | | | | I never got around to making use of it. Notes: svn path=/head/; revision=140889
* Cut out the gordian handling of subnormals by bit fiddling, andDavid Schultz2005-01-181-128/+15
| | | | | | | | | | | | | instead use the FPU to convert subnormals to normals. (NB: Further simplification is possible, such as using the FPU for the rounding step.) This fixes a bug reported by stefanf where long double subnormals in the Intel 80-bit format would be output with one fewer digit than necessary when the default precision was used. Notes: svn path=/head/; revision=140430
* Eliminate gdtoa.mk and move its contents to ${MACHINE_ARCH}/Makefile.inc.David Schultz2005-01-151-4/+1
| | | | | | | | The purpose of having a separate file involved an abandoned scheme that would have kept contrib/gdtoa out of the include path for the rest of libc. Notes: svn path=/head/; revision=140279
* Updated manh shift constant type to 'ULL' for PPC to fixPeter Grehan2004-01-211-1/+1
| | | | | | | | | shift-too-large compile error reviewed by: das Notes: svn path=/head/; revision=124767
* Implement __hdtoa() and __hldtoa() and enable printf() support for %aDavid Schultz2004-01-182-1/+433
| | | | | | | and %A, which print floating-point numbers in hexadecimal. Notes: svn path=/head/; revision=124667
* Fix a bug that caused long double subnormals to be printedDavid Schultz2004-01-181-0/+3
| | | | | | | | incorrectly on architectures without an explicit normalization bit (sparc64, powerpc). Notes: svn path=/head/; revision=124652
* Replaced an ugly hack to selectively disable warningsRuslan Ermilov2004-01-111-3/+0
| | | | | | | | | | in contributed sources with just a hack made possible by bsd.sys.mk,v 1.33. This is better because it just nulls out the warning flags rather than adding gcc(1) specific -w option to CFLAGS. Notes: svn path=/head/; revision=124374
* Add an ulgy hack so that warnings added by non-zero WARNS values won't beDavid E. O'Brien2004-01-101-0/+3
| | | | | | | | | used with the contrib/ gdtoa sources as they aren't WARNS-clean. Submitted by: ru Notes: svn path=/head/; revision=124354
* Userland spinlocks bad. Sleep locks good.David Schultz2003-06-211-2/+5
| | | | | | | | | Use the latter for gdtoa. Requested by: deischen (far too long ago) Notes: svn path=/head/; revision=116652
* /strtopx/ s/result/&result/David Schultz2003-04-092-2/+2
| | | | | | | This is the version I *meant* to commit last week. Notes: svn path=/head/; revision=113278
* Add __ldtoa(), a wrapper around gdtoa() to make it look like dtoa().David Schultz2003-04-052-1/+98
| | | | | | | | | | In support of this, add some MD macros to assist in converting long doubles to the format expected by gdtoa(). Reviewed by: silence on standards@ Notes: svn path=/head/; revision=113145
* Clean up the way gdtoa sources are found.David E. O'Brien2003-03-131-1/+6
| | | | | | | OK'ed by: das Notes: svn path=/head/; revision=112202
* Replace our ancient dtoa/strtod implementation with the gdtoaDavid Schultz2003-03-125-0/+159
package, a more recent, generalized set of routines. Among the changes: - Declare strtof() and strtold() in stdlib.h. - Add glue to libc to support these routines for all kinds of ``long double''. - Update printf() to reflect the fact that dtoa works slightly differently now. As soon as I see that nothing has blown up, I will kill src/lib/libc/stdlib/strtod.c. Soon printf() will be able to use the new routines to output long doubles without loss of precision, but numerous bugs in the existing code must be addressed first. Reviewed by: bde (briefly), mike (mentor), obrien Notes: svn path=/head/; revision=112163
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