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libs/libc/machine/arm/armv7-m: Add Cortex M4F mach optimized fabsf and sqrtf.

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This commit is contained in:
David S. Alessio 2019-07-29 20:27:33 -06:00 committed by Gregory Nutt
parent 9f24fb5b4b
commit f2b96016ad
7 changed files with 139 additions and 7 deletions
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30
libs/libc/machine/arm/armv7-m/Kconfig
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@ -3,9 +3,39 @@
# see the file kconfig-language.txt in the NuttX tools repository.
#
if ARCH_ARMV7M
config ARMV7M_MEMCPY
bool "Enable optimized memcpy() for ARMv7-M"
default n
select MACHINE_OPTS_ARMV7M
select LIBC_ARCH_MEMCPY
depends on ARCH_TOOLCHAIN_GNU
---help---
Enable optimized ARMv7-M specific memcpy() library function
config ARMV7M_LIBM
bool "Architecture specific FPU optimizations"
default n
select MACHINE_OPTS_ARMV7M
select LIBM_ARCH_FABSF
select LIBM_ARCH_SQRTF
depends on ARCH_FPU
depends on LIBM
---help---
Enable ARMv7E-M specific floating point optimizations
for fabsf() and fsqrtf()
config MACHINE_OPTS_ARMV7M
bool
default n
config LIBM_ARCH_FABSF
bool
default n
config LIBM_ARCH_SQRTF
bool
default n
endif

18
libs/libc/machine/arm/armv7-m/Make.defs
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@ -34,20 +34,26 @@
############################################################################
ifeq ($(CONFIG_ARMV7M_MEMCPY),y)
ASRCS += arch_memcpy.S
DEPPATH += --dep-path machine/arm/armv7-m/gnu
VPATH += :machine/arm/armv7-m/gnu
endif
ifeq ($(CONFIG_LIBC_ARCH_ELF),y)
ifeq ($(CONFIG_MACHINE_OPTS_ARMV7M),y)
ifeq ($(CONFIG_LIBC_ARCH_ELF),y)
CSRCS += arch_elf.c
endif
ifeq ($(CONFIG_LIBM_ARCH_FABSF),y)
CSRCS += arch_fabsf.c
endif
ifeq ($(CONFIG_LIBM_ARCH_SQRTF),y)
CSRCS += arch_sqrtf.c
endif
DEPPATH += --dep-path machine/arm/armv7-m
VPATH += :machine/arm/armv7-m
endif

45
libs/libc/machine/arm/armv7-m/arch_fabsf.c Normal file
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@ -0,0 +1,45 @@
/****************************************************************************
* libs/libc/machine/arm/armv7-m/math/arch_fabsf.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2019 Gregory Nutt. All rights reserved.
* Author: David S. Alessio <david.s.alessio@gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <math.h>
/****************************************************************************
* Public Functions
****************************************************************************/
#if (__ARM_ARCH >= 7) && (__ARM_FP >= 4)
float fabsf(float x)
{
float result;
asm volatile ( "vabs.f32\t%0, %1" : "=t" (result) : "t" (x) );
return result;
}
#else
# warning fabsf() not built
#endif

45
libs/libc/machine/arm/armv7-m/arch_sqrtf.c Normal file
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@ -0,0 +1,45 @@
/****************************************************************************
* libs/libc/machine/arm/armv7-m/math/arch_sqrtf.c
*
* This file is a part of NuttX:
*
* Copyright (C) 2019 Gregory Nutt. All rights reserved.
* Author: David S. Alessio <david.s.alessio@gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <math.h>
/****************************************************************************
* Public Functions
****************************************************************************/
#if (__ARM_ARCH >= 7) && (__ARM_FP >= 4)
float sqrtf(float x)
{
float result;
asm volatile ( "vsqrt.f32\t%0, %1" : "=t" (result) : "t" (x) );
return result;
}
#else
# warning fabsf() not built
#endif

3
libs/libc/math/lib_fabsf.c
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@ -29,13 +29,16 @@
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <math.h>
/****************************************************************************
* Public Functions
****************************************************************************/
#ifndef CONFIG_LIBM_ARCH_FABSF
float fabsf(float x)
{
return ((x < 0) ? -x : x);
}
#endif

2
libs/libc/math/lib_sqrtf.c
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@ -41,6 +41,7 @@
* Public Functions
****************************************************************************/
#ifndef CONFIG_LIBM_ARCH_SQRTF
float sqrtf(float x)
{
float y;
@ -82,3 +83,4 @@ float sqrtf(float x)
return y;
}
#endif

3
libs/libc/stdio/lib_libvsprintf.c
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@ -384,7 +384,8 @@ static int vsprintf_internal(FAR struct lib_outstream_s *stream,
* (1) the eZ80 which has sizeof(size_t) = 3 which is the
* same as the sizeof(int). And (2) if CONFIG_LIBC_LONG_LONG
* is not enabled and sizeof(size_t) is equal to
* sizeof(unsigned long long). This latter case is an error.
* sizeof(unsigned long long). This latter case is an
* error.
*/
default: