From: Sebastian Huber <sebastian.huber@embedded-brains.de>
To: Keith Packard <keithp@keithp.com>, newlib@sourceware.org
Subject: Re: [PATCH 0/3] ARM with only 32-bit floats do not have fast 64-bit FMA
Date: Tue, 1 Sep 2020 19:21:17 +0200 [thread overview]
Message-ID: <f4435083-b0e3-06d5-2615-4cd6b260c8d6@embedded-brains.de> (raw)
In-Reply-To: <1fc07c90-694b-01ea-cedc-0656eccdd827@embedded-brains.de>
On 01/09/2020 18:32, Sebastian Huber wrote:
> Hello,
>
> with the latest Newlib, I get a linker error in the RTEMS test suite:
>
>
> undefined reference to `fma'
> undefined reference to `fmaf'
>
> The following machine flags are used:
>
> '-march=armv7-a', '-mthumb', '-mfpu=neon', '-mfloat-abi=hard',
> '-mtune=cortex-a9'
>
> It seems to be missing in the corresponding multilib:
>
> nm /build/rtems/6/arm-rtems6/lib/thumb/armv7-a+simd/hard/libm.a | grep
> fma
> lib_a-fmal.o:
> U fma
> 00000000 T fmal
> lib_a-fmaxl.o:
> U fmax
> 00000000 T fmaxl
> lib_a-s_fma.o:
> lib_a-s_fmax.o:
> 00000000 T fmax
> lib_a-sf_fma.o:
> lib_a-sf_fmax.o:
> 00000000 T fmaxf
>
It seems to be present in only some multilibs:
for i in $(find /build/rtems/6/arm-rtems6/lib -name libm.a); do echo $i
; nm --defined-only $i | grep 'T.*\<fma\>'; done
/build/rtems/6/arm-rtems6/lib/eb/thumb/armv7-r+fp/hard/libm.a
/build/rtems/6/arm-rtems6/lib/eb/thumb/armv7-r/libm.a
/build/rtems/6/arm-rtems6/lib/libm.a
/build/rtems/6/arm-rtems6/lib/thumb/cortex-m4/hard/libm.a
/build/rtems/6/arm-rtems6/lib/thumb/cortex-m3/libm.a
/build/rtems/6/arm-rtems6/lib/thumb/cortex-m7/hard/libm.a
00000000 T fma
/build/rtems/6/arm-rtems6/lib/thumb/armv6-m/libm.a
/build/rtems/6/arm-rtems6/lib/thumb/armv7-r+fp/hard/libm.a
/build/rtems/6/arm-rtems6/lib/thumb/armv7-r/libm.a
/build/rtems/6/arm-rtems6/lib/thumb/cortex-m4+nofp/libm.a
/build/rtems/6/arm-rtems6/lib/thumb/libm.a
/build/rtems/6/arm-rtems6/lib/thumb/armv7-a+simd/hard/libm.a
/build/rtems/6/arm-rtems6/lib/thumb/armv7-a/libm.a
/build/rtems/6/arm-rtems6/lib/armv5te+fp/hard/libm.a
for i in $(find /build/rtems/6/arm-rtems6/lib -name libm.a); do echo $i
; nm --defined-only $i | grep 'T.*\<fmaf\>'; done
/build/rtems/6/arm-rtems6/lib/eb/thumb/armv7-r+fp/hard/libm.a
/build/rtems/6/arm-rtems6/lib/eb/thumb/armv7-r/libm.a
/build/rtems/6/arm-rtems6/lib/libm.a
/build/rtems/6/arm-rtems6/lib/thumb/cortex-m4/hard/libm.a
00000000 T fmaf
/build/rtems/6/arm-rtems6/lib/thumb/cortex-m3/libm.a
/build/rtems/6/arm-rtems6/lib/thumb/cortex-m7/hard/libm.a
00000000 T fmaf
/build/rtems/6/arm-rtems6/lib/thumb/armv6-m/libm.a
/build/rtems/6/arm-rtems6/lib/thumb/armv7-r+fp/hard/libm.a
/build/rtems/6/arm-rtems6/lib/thumb/armv7-r/libm.a
/build/rtems/6/arm-rtems6/lib/thumb/cortex-m4+nofp/libm.a
/build/rtems/6/arm-rtems6/lib/thumb/libm.a
/build/rtems/6/arm-rtems6/lib/thumb/armv7-a+simd/hard/libm.a
/build/rtems/6/arm-rtems6/lib/thumb/armv7-a/libm.a
/build/rtems/6/arm-rtems6/lib/armv5te+fp/hard/libm.a
next prev parent reply other threads:[~2020-09-01 17:21 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-08 22:34 Keith Packard
2020-08-08 22:34 ` [PATCH 1/3] libm: ARM without HW double does not have fast FMA Keith Packard
2020-08-08 22:34 ` [PATCH 2/3] libm: Detect fast fmaf support Keith Packard
2020-08-08 22:34 ` [PATCH 3/3] libm/machine/arm: Add optimized fmaf and fma when available Keith Packard
2020-08-10 9:30 ` [PATCH 0/3] ARM with only 32-bit floats do not have fast 64-bit FMA Corinna Vinschen
2020-08-10 14:43 ` Szabolcs Nagy
2020-08-10 15:19 ` Keith Packard
2020-08-10 19:06 ` Corinna Vinschen
2020-09-01 16:32 ` Sebastian Huber
2020-09-01 17:21 ` Sebastian Huber [this message]
2020-09-01 18:04 ` Sebastian Huber
2020-09-01 19:28 ` Keith Packard
2020-09-01 21:16 ` Joseph Myers
2020-09-01 23:06 ` Keith Packard
2020-09-02 4:41 ` Sebastian Huber
2020-09-02 5:25 ` Keith Packard
2020-09-02 5:35 ` Keith Packard
2020-09-02 17:12 ` Joseph Myers
2020-09-02 17:59 ` Sebastian Huber
2020-09-02 20:39 ` Keith Packard
2020-09-01 19:50 ` Keith Packard
2020-09-07 14:09 Eric Bresie
2020-09-07 17:16 ` Keith Packard
2020-09-07 20:16 ` Brian Inglis
2020-09-07 22:23 ` Keith Packard
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