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* [glibc] arm: Fix softp-fp Implies (BZ #25635)
@ 2020-03-06 12:59 Adhemerval Zanella
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From: Adhemerval Zanella @ 2020-03-06 12:59 UTC (permalink / raw)
To: glibc-cvs
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=af09e5e5d9ec3ca20891e61a6922eac984fcbdc4
commit af09e5e5d9ec3ca20891e61a6922eac984fcbdc4
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date: Thu Mar 5 13:14:41 2020 +0000
arm: Fix softp-fp Implies (BZ #25635)
The commit "arm: Split BE/LE abilist"
(1673ba87fefe019c834c09d33673d1d453ea698d) changed the soft-fp order for
ARM selection when __SOFTFP__ is defined by the compiler.
On 2.30 the sysdeps order is:
2.30
sysdeps/unix/sysv/linux/arm
sysdeps/arm/nptl
sysdeps/unix/sysv/linux
sysdeps/nptl
sysdeps/pthread
sysdeps/gnu
sysdeps/unix/inet
sysdeps/unix/sysv
sysdeps/unix/arm
sysdeps/unix
sysdeps/posix
sysdeps/arm/nofpu
sysdeps/ieee754/soft-fp
sysdeps/arm
sysdeps/wordsize-32
sysdeps/ieee754/flt-32
sysdeps/ieee754/dbl-64
sysdeps/ieee754
sysdeps/generic
While on master is:
sysdeps/unix/sysv/linux/arm/le
sysdeps/unix/sysv/linux/arm
sysdeps/arm/nptl
sysdeps/unix/sysv/linux
sysdeps/nptl
sysdeps/pthread
sysdeps/gnu
sysdeps/unix/inet
sysdeps/unix/sysv
sysdeps/unix/arm
sysdeps/unix
sysdeps/posix
sysdeps/arm/le
sysdeps/arm
sysdeps/wordsize-32
sysdeps/ieee754/flt-32
sysdeps/ieee754/dbl-64
sysdeps/arm/nofpu
sysdeps/ieee754/soft-fp
sysdeps/ieee754
sysdeps/generic
It make the build select some routines (fadd, fdiv, fmul, fsub, and fma)
on ieee754/flt-32 and ieee754/dbl-64 that requires fenv support to be
correctly rounded which in turns lead to math failures since the
__SOFTFP__ does not have fenv support.
With this patch the order is now:
sysdeps/unix/sysv/linux/arm/le
sysdeps/unix/sysv/linux/arm
sysdeps/arm/nptl
sysdeps/unix/sysv/linux
sysdeps/nptlsysdeps/pthread
sysdeps/gnu
sysdeps/unix/inet
sysdeps/unix/sysv
sysdeps/unix/arm
sysdeps/unix
sysdeps/posix
sysdeps/arm/le/nofpu
sysdeps/arm/nofpu
sysdeps/ieee754/soft-fp
sysdeps/arm/le
sysdeps/arm
sysdeps/wordsize-32
sysdeps/ieee754/flt-32
sysdeps/ieee754/dbl-64
sysdeps/ieee754
sysdeps/generic
Checked on arm-linux-gnuaebi.
Diff:
---
sysdeps/arm/be/nofpu/Implies | 1 +
sysdeps/arm/le/nofpu/Implies | 1 +
2 files changed, 2 insertions(+)
diff --git a/sysdeps/arm/be/nofpu/Implies b/sysdeps/arm/be/nofpu/Implies
new file mode 100644
index 0000000..c90dd7f
--- /dev/null
+++ b/sysdeps/arm/be/nofpu/Implies
@@ -0,0 +1 @@
+arm/nofpu
diff --git a/sysdeps/arm/le/nofpu/Implies b/sysdeps/arm/le/nofpu/Implies
new file mode 100644
index 0000000..c90dd7f
--- /dev/null
+++ b/sysdeps/arm/le/nofpu/Implies
@@ -0,0 +1 @@
+arm/nofpu
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2020-03-06 12:59 [glibc] arm: Fix softp-fp Implies (BZ #25635) Adhemerval Zanella
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