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f6e0ec5696
gcc/libgcc/soft-fp
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Jakub Jelinek f6e0ec5696 libgcc _BitInt helper documentation [PR102989] 
On Mon, Aug 21, 2023 at 05:32:04PM +0000, Joseph Myers wrote:
> I think the libgcc functions (i.e. those exported by libgcc, to which
> references are generated by the compiler) need documenting in libgcc.texi.
> Internal functions or macros in the libgcc patch need appropriate comments
> specifying their semantics; especially FP_TO_BITINT and FP_FROM_BITINT
> which have a lot of arguments and no comments saying what the semantics of
> the macros and their arguments are supposed to me.

Here is an incremental patch which does that.

2023-09-06  Jakub Jelinek  <jakub@redhat.com>

	PR c/102989
gcc/
	* doc/libgcc.texi (Bit-precise integer arithmetic functions):
	Document general rules for _BitInt support library functions
	and document __mulbitint3 and __divmodbitint4.
	(Conversion functions): Document __fix{s,d,x,t}fbitint,
	__floatbitint{s,d,x,t,h,b}f, __bid_fix{s,d,t}dbitint and
	__bid_floatbitint{s,d,t}d.
libgcc/
	* libgcc2.c (bitint_negate): Add function comment.
	* soft-fp/bitint.h (bitint_negate): Add function comment.
	(FP_TO_BITINT, FP_FROM_BITINT): Add comment explaining the macros.
2023-09-06 17:42:37 +02:00
..
adddf3.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
addsf3.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
addtf3.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
bitint.h libgcc _BitInt helper documentation [PR102989] 2023-09-06 17:42:37 +02:00
bitintpow10.c libgcc _BitInt support [PR102989] 2023-09-06 17:33:05 +02:00
bitintpow10.h libgcc: Generated tables for _BitInt <-> _Decimal* conversions [PR102989] 2023-09-06 17:31:23 +02:00
brain.h middle-end, c++, i386, libgcc: std::bfloat16_t and __bf16 arithmetic support 2022-10-14 09:37:01 +02:00
divdf3.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
divsf3.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
divtf3.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
double.h soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
eqdf2.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
eqhf2.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
eqsf2.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
eqtf2.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
extendbfsf2.c middle-end, c++, i386, libgcc: std::bfloat16_t and __bf16 arithmetic support 2022-10-14 09:37:01 +02:00
extenddftf2.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
extended.h soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
extendhfdf2.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
extendhfsf2.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
extendhftf2.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
extendhfxf2.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
extendsfdf2.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
extendsftf2.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
extendxftf2.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
fixddbitint.c libgcc _BitInt support [PR102989] 2023-09-06 17:33:05 +02:00
fixdfbitint.c libgcc _BitInt support [PR102989] 2023-09-06 17:33:05 +02:00
fixdfdi.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
fixdfsi.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
fixdfti.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
fixhfdi.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
fixhfsi.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
fixhfti.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
fixsdbitint.c libgcc _BitInt support [PR102989] 2023-09-06 17:33:05 +02:00
fixsfbitint.c libgcc _BitInt support [PR102989] 2023-09-06 17:33:05 +02:00
fixsfdi.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
fixsfsi.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
fixsfti.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
fixtdbitint.c libgcc _BitInt support [PR102989] 2023-09-06 17:33:05 +02:00
fixtfbitint.c libgcc _BitInt support [PR102989] 2023-09-06 17:33:05 +02:00
fixtfdi.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
fixtfsi.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
fixtfti.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
fixunsdfdi.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
fixunsdfsi.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
fixunsdfti.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
fixunshfdi.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
fixunshfsi.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
fixunshfti.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
fixunssfdi.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
fixunssfsi.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
fixunssfti.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
fixunstfdi.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
fixunstfsi.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
fixunstfti.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
fixxfbitint.c libgcc _BitInt support [PR102989] 2023-09-06 17:33:05 +02:00
floatbitintbf.c libgcc _BitInt support [PR102989] 2023-09-06 17:33:05 +02:00
floatbitintdd.c libgcc _BitInt support [PR102989] 2023-09-06 17:33:05 +02:00
floatbitintdf.c libgcc _BitInt support [PR102989] 2023-09-06 17:33:05 +02:00
floatbitinthf.c libgcc _BitInt support [PR102989] 2023-09-06 17:33:05 +02:00
floatbitintsd.c libgcc _BitInt support [PR102989] 2023-09-06 17:33:05 +02:00
floatbitintsf.c libgcc _BitInt support [PR102989] 2023-09-06 17:33:05 +02:00
floatbitinttd.c libgcc _BitInt support [PR102989] 2023-09-06 17:33:05 +02:00
floatbitinttf.c libgcc _BitInt support [PR102989] 2023-09-06 17:33:05 +02:00
floatbitintxf.c libgcc _BitInt support [PR102989] 2023-09-06 17:33:05 +02:00
floatdibf.c aarch64: Add bfloat16_t support for aarch64 2023-03-13 00:16:45 +01:00
floatdidf.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
floatdihf.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
floatdisf.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
floatditf.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
floatsidf.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
floatsihf.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
floatsisf.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
floatsitf.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
floattibf.c libgcc, i386: Add __fix{,uns}bfti and __float{,un}tibf [PR107703] 2023-03-10 20:39:54 +01:00
floattidf.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
floattihf.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
floattisf.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
floattitf.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
floatundibf.c aarch64: Add bfloat16_t support for aarch64 2023-03-13 00:16:45 +01:00
floatundidf.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
floatundihf.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
floatundisf.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
floatunditf.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
floatunsidf.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
floatunsihf.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
floatunsisf.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
floatunsitf.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
floatuntibf.c libgcc, i386: Add __fix{,uns}bfti and __float{,un}tibf [PR107703] 2023-03-10 20:39:54 +01:00
floatuntidf.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
floatuntihf.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
floatuntisf.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
floatuntitf.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
gedf2.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
gesf2.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
getf2.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
half.h soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
ledf2.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
lesf2.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
letf2.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
muldf3.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
mulsf3.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
multf3.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
negdf2.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
negsf2.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
negtf2.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
op-1.h soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
op-2.h soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
op-4.h soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
op-8.h soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
op-common.h libgcc _BitInt support [PR102989] 2023-09-06 17:33:05 +02:00
quad.h PR target/107299: Fix build issue when long double is IEEE 128-bit 2023-03-06 17:38:33 -05:00
README
single.h soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
soft-fp.h soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
subdf3.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
subsf3.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
subtf3.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
truncbfhf2.c middle-end, c++, i386, libgcc: std::bfloat16_t and __bf16 arithmetic support 2022-10-14 09:37:01 +02:00
truncdfbf2.c middle-end, c++, i386, libgcc: std::bfloat16_t and __bf16 arithmetic support 2022-10-14 09:37:01 +02:00
truncdfhf2.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
truncdfsf2.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
trunchfbf2.c middle-end, c++, i386, libgcc: std::bfloat16_t and __bf16 arithmetic support 2022-10-14 09:37:01 +02:00
truncsfbf2.c middle-end, c++, i386, libgcc: std::bfloat16_t and __bf16 arithmetic support 2022-10-14 09:37:01 +02:00
truncsfhf2.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
trunctfbf2.c middle-end, c++, i386, libgcc: std::bfloat16_t and __bf16 arithmetic support 2022-10-14 09:37:01 +02:00
trunctfdf2.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
trunctfhf2.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
trunctfsf2.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
trunctfxf2.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
truncxfbf2.c middle-end, c++, i386, libgcc: std::bfloat16_t and __bf16 arithmetic support 2022-10-14 09:37:01 +02:00
truncxfhf2.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
unorddf2.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
unordsf2.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00
unordtf2.c soft-fp: Update soft-fp from glibc 2022-08-16 23:32:30 +08:00

README 

The files in this directory are part of the GNU C Library, not part of
GCC.  As described at <http://gcc.gnu.org/codingconventions.html>,
changes should be made to the GNU C Library and the changed files then
imported into GCC.