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4 Commits

Author SHA1 Message Date
Joseph Myers
4b6574a6f6 Redirect fma calls to __fma in libm 
include/math.h has a mechanism to redirect internal calls to various
libm functions, that can often be inlined by the compiler, to call
non-exported __* names for those functions in the case when the calls
aren't inlined, with the redirection being disabled when
NO_MATH_REDIRECT.  Add fma to the functions to which this mechanism is
applied.

At present, libm-internal fma calls (generally to __builtin_fma*
functions) are only done when it's known the call will be inlined,
with alternative code not relying on an fma operation being used in
the caller otherwise.  This patch is in preparation for adding the TS
18661 / C2X narrowing fma functions to glibc; it will be natural for
the narrowing function implementations to call the underlying fma
functions unconditionally, with this either being inlined or resulting
in an __fma* call.  (Using two levels of round-to-odd computation like
that, in the case where there isn't an fma hardware instruction, isn't
optimal but is certainly a lot simpler for the initial implementation
than writing different narrowing fma implementations for all the
various pairs of formats.)

Tested with build-many-glibcs.py that installed stripped shared
libraries are unchanged by the patch (using
<https://sourceware.org/pipermail/libc-alpha/2021-September/130991.html>
to fix installed library stripping in build-many-glibcs.py).  Also
tested for x86_64.
 2021-09-15 22:57:35 +00:00
Joseph Myers
3e5efdbdbe Use libm_alias_float for sparc. 
Continuing the preparation for additional _FloatN / _FloatNx function
aliases, this patch makes sparc libm function implementations use
libm_alias_float to define function aliases.

Tested with build-many-glibcs.py for all its sparc configurations that
installed stripped shared libraries are unchanged by the patch.

	* sysdeps/sparc/sparc32/fpu/s_copysignf.S: Include
	<libm-alias-float.h>.
	(copysignf): Define using libm_alias_float.
	* sysdeps/sparc/sparc32/fpu/s_fabsf.S: Include
	<libm-alias-float.h>.
	(fabsf): Define using libm_alias_float.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_copysignf.S:
	Include <libm-alias-float.h>.
	(copysignf): Define using libm_alias_float.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fabsf.S: Include
	<libm-alias-float.h>.
	(fabsf): Define using libm_alias_float.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdimf.c: Include
	<libm-alias-float.h>.
	(fdimf): Define using libm_alias_float.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fmaf.c: Include
	<libm-alias-float.h>.
	(fmaf): Define using libm_alias_float.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_llrintf.S: Include
	<libm-alias-float.h>.
	(llrintf): Define using libm_alias_float.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_nearbyintf.S:
	Include <libm-alias-float.h>.
	(nearbyintf): Define using libm_alias_float.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_rintf.S: Include
	<libm-alias-float.h>.
	(rintf): Define using libm_alias_float.
	* sysdeps/sparc/sparc32/sparcv9/fpu/s_llrintf.S: Include
	<libm-alias-float.h>.
	(llrintf): Define using libm_alias_float.
	* sysdeps/sparc/sparc32/sparcv9/fpu/s_lrintf.S: Include
	<libm-alias-float.h>.
	(lrintf): Define using libm_alias_float.
	* sysdeps/sparc/sparc32/sparcv9/fpu/s_nearbyintf.S: Include
	<libm-alias-float.h>.
	(nearbyintf): Define using libm_alias_float.
	* sysdeps/sparc/sparc32/sparcv9/fpu/s_rintf.S: Include
	<libm-alias-float.h>.
	(rintf): Define using libm_alias_float.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_ceilf.c: Include
	<libm-alias-float.h>.
	(ceilf): Define using libm_alias_float.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_floorf.c: Include
	<libm-alias-float.h>.
	(floorf): Define using libm_alias_float.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_fmaf.c: Include
	<libm-alias-float.h>.
	(fmaf): Define using libm_alias_float.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_lrintf.c: Include
	<libm-alias-float.h>.
	(lrintf): Define using libm_alias_float.
	(llrintf): Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_nearbyintf.c: Include
	<libm-alias-float.h>.
	(nearbyintf): Define using libm_alias_float.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_rintf.c: Include
	<libm-alias-float.h>.
	(rintf): Define using libm_alias_float.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_truncf.c: Include
	<libm-alias-float.h>.
	(truncf): Define using libm_alias_float.
	* sysdeps/sparc/sparc64/fpu/s_copysignf.S: Include
	<libm-alias-float.h>.
	(copysignf): Define using libm_alias_float.
	* sysdeps/sparc/sparc64/fpu/s_fabsf.c: Include
	<libm-alias-float.h>.
	(fabsf): Define using libm_alias_float.
	* sysdeps/sparc/sparc64/fpu/s_lrintf.S: Include
	<libm-alias-float.h>.
	(lrintf): Define using libm_alias_float.
	(llrintf): Likewise.
	* sysdeps/sparc/sparc64/fpu/s_nearbyintf.S: Include
	<libm-alias-float.h>.
	(nearbyintf): Define using libm_alias_float.
	* sysdeps/sparc/sparc64/fpu/s_rintf.S: Include
	<libm-alias-float.h>.
	(rintf): Define using libm_alias_float.
 2017-11-30 00:30:40 +00:00
Adhemerval Zanella
a55430cb0e sparc: Assume VIS3 support 
This patch assumes VIS3 support by binutils, which is supported since
version 2.22.  This leads to some code simplification, mostly on
multiarch build where there is only one variant instead of previously
two (whether binutils supports VIS3 instructions or not).

For multiarch files where HAVE_AS_VIS3_SUPPORT was checked and
the default implementation was built with a different name, a new
file with (implementation with -generic appended) is added.

Checked on sparc64-linux-gnu and sparcv9-linux-gnu.

	* config.h.in (HAVE_AS_VIS3_SUPPORT): Remove check for VIS3 support.
	* sysdeps/sparc/configure.ac (HAVE_AS_VIS3_SUPPORT): Likewise.
	* sysdeps//sparc/sparc32/sparcv9/fpu/multiarch/s_fdim.c: Likewise.
	* sysdeps//sparc/sparc32/sparcv9/fpu/multiarch/s_fdimf.c: Likewise.
	* sysdeps//sparc/sparc32/sparcv9/fpu/multiarch/s_fma.c: Likewise.
	* sysdeps//sparc/sparc32/sparcv9/fpu/multiarch/s_fmaf.c: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_ceil.c: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_ceilf.c: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_floor.c: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_floorf.c: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_fma.c: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_fmaf.c: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_trunc.c: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_truncf.c: Likewise.
	* sysdeps/sparc/sparc-ifunc.h [!HAVE_AS_VIS3_SUPPORT]
	(SPARC_ASM_VIS3_IFUNC, SPARC_ASM_VIS3_VIS2_IFUNC): Remove macros.
	* sysdeps/sparc/sparc32/sparcv9/Makefile [$(have-as-vis3) != yes]
	(ASFLAGS.o, ASFLAGS-.os, ASFLAGS-.op, ASFLAGS-.oS): Remove rules.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/Makefile
	($(have-as-vis3) == yes): Remove conditional.
	* sysdeps/sparc/sparc64/Makefile (($(have-as-vis3) == yes)):
	Likewise.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdim-generic.c: New
	file.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fdimf-generic.c: New
	file.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fma-generic.c: New
	file.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fmaf-generic.c: New
	file.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_ceil-generic.c: New file.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_ceilf-generic.c: New file.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_floor-generic.c: New file.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_floorf-generic.c: New file.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_fma-generic.c: New file.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_fmaf-generic.c: New file.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_trunc-generic.c: New file.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_truncf-generic.c: New file.

Signed-off-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
 2017-11-29 08:18:00 -02:00
David S. Miller
e6a62e18fd Add sparc vis3 optimized fma/fmaf. 
* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fma-vis3.S: New file.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fma.c: New file.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fmaf-vis3.S: New file.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_fmaf.c: New file.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_fma-vis3.S: New file.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_fma.c: New file.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_fmaf-vis3.S: New file.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_fmaf.c: New file.
	* sysdeps/sparc/sparc64/fpu/multiarch/Makefile: Add fma/fmaf
	sysdep routines.
	* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/Makefile: Likewise.
 2012-03-15 23:09:16 -07:00