musl/src/math/armhf, branch master musl - an implementation of the standard library for Linux-based systems replace armhf math asm source files with inline asm 2016-01-20T01:09:57+00:00 Rich Felker dalias@aerifal.cx 2016-01-20T01:09:57+00:00 e4355bd6bec89688e8c739cd7b4c76e675643dca this makes it possible to inline them with LTO, and is the simplest approach to eliminating the use of .sub files. this also makes VFP sqrt available for use with the standard EABI (plain arm rather than armhf subarch) when libc is built with -mfloat-abi=softfp. the same could have been done for fabs, but when the argument and return value are in integer registers, moving to VFP registers and back is almost certainly more costly than a simple integer operation. 
this makes it possible to inline them with LTO, and is the simplest
approach to eliminating the use of .sub files.

this also makes VFP sqrt available for use with the standard EABI
(plain arm rather than armhf subarch) when libc is built with
-mfloat-abi=softfp. the same could have been done for fabs, but when
the argument and return value are in integer registers, moving to VFP
registers and back is almost certainly more costly than a simple
integer operation.
explicitly assemble all arm asm sources as UAL 2015-11-10T05:01:55+00:00 Rich Felker dalias@aerifal.cx 2015-11-10T05:01:55+00:00 4e73d12117e362ad4b82946dc084b4a38f76e54b these files are all accepted as legacy arm syntax when producing arm code, but legacy syntax cannot be used for producing thumb2 with access to the full ISA. even after switching to UAL, some asm source files contain instructions which are not valid in thumb mode, so these will need to be addressed separately. 
these files are all accepted as legacy arm syntax when producing arm
code, but legacy syntax cannot be used for producing thumb2 with
access to the full ISA. even after switching to UAL, some asm source
files contain instructions which are not valid in thumb mode, so these
will need to be addressed separately.
declare fpu usage to the assembler in arm hard-float asm files 2015-10-19T06:05:58+00:00 Szabolcs Nagy nsz@port70.net 2015-10-19T06:05:58+00:00 7557a8462e3c973466ce082211520182f243dc2a Some armhf gcc toolchains (built with --with-float=hard but without --with-fpu=vfp*) do not pass -mfpu=vfp to the assembler and then binutils rejects the UAL mnemonics for VFP unless there is an .fpu vfp directive in the asm source. 
Some armhf gcc toolchains (built with --with-float=hard but without
--with-fpu=vfp*) do not pass -mfpu=vfp to the assembler and then
binutils rejects the UAL mnemonics for VFP unless there is an .fpu vfp
directive in the asm source.
some initial math asm for armhf (fabs[f] and sqrt[f]) 2013-08-16T21:32:30+00:00 Rich Felker dalias@aerifal.cx 2013-08-16T21:32:30+00:00 63893d3ff1f9383ba3ce63a19b7de74ace319d77