--- /dev/null
+--- a/libc/sysdeps/linux/i386/Makefile.arch
++++ b/libc/sysdeps/linux/i386/Makefile.arch
+@@ -9,6 +9,7 @@ CSRC := brk.c sigaction.c __syscall_erro
+
+ SSRC := \
+ __longjmp.S vfork.S clone.S setjmp.S bsd-setjmp.S bsd-_setjmp.S \
+- sync_file_range.S syscall.S mmap.S mmap64.S posix_fadvise64.S
++ sync_file_range.S syscall.S mmap.S mmap64.S posix_fadvise64.S \
++ s_copysign.S s_copysignf.S s_copysignl.S
+
+ include $(top_srcdir)libc/sysdeps/linux/Makefile.commonarch
+--- /dev/null
++++ b/libc/sysdeps/linux/i386/s_copysign.S
+@@ -0,0 +1,25 @@
++/*
++ * Written by J.T. Conklin <jtc@netbsd.org>.
++ * Public domain.
++ */
++
++#define _ERRNO_H 1
++#include <features.h>
++#include <bits/errno.h>
++
++.text
++.global copysign
++.type copysign,%function
++copysign:
++ movl 16(%esp),%edx
++ movl 8(%esp),%eax
++ andl $0x80000000,%edx
++ andl $0x7fffffff,%eax
++ orl %edx,%eax
++ movl %eax,8(%esp)
++ fldl 4(%esp)
++ ret
++.size copysign,.-copysign
++
++libc_hidden_def(copysign)
++
+--- /dev/null
++++ b/libc/sysdeps/linux/i386/s_copysignf.S
+@@ -0,0 +1,25 @@
++/*
++ * Written by J.T. Conklin <jtc@netbsd.org>.
++ * Public domain.
++ */
++
++#define _ERRNO_H 1
++#include <features.h>
++#include <bits/errno.h>
++
++.text
++.global copysignf
++.type copysignf,%function
++copysignf:
++ movl 8(%esp),%edx
++ movl 4(%esp),%eax
++ andl $0x80000000,%edx
++ andl $0x7fffffff,%eax
++ orl %edx,%eax
++ movl %eax,4(%esp)
++ flds 4(%esp)
++ ret
++.size copysignf,.-copysignf
++
++libc_hidden_def(copysignf)
++
+--- /dev/null
++++ b/libc/sysdeps/linux/i386/s_copysignl.S
+@@ -0,0 +1,26 @@
++/*
++ * Written by J.T. Conklin <jtc@netbsd.org>.
++ * Changes for long double by Ulrich Drepper <drepper@cygnus.com>
++ * Public domain.
++ */
++
++#define _ERRNO_H 1
++#include <features.h>
++#include <bits/errno.h>
++
++.text
++.global copysignl
++.type copysignl,%function
++copysignl:
++ movl 24(%esp),%edx
++ movl 12(%esp),%eax
++ andl $0x8000,%edx
++ andl $0x7fff,%eax
++ orl %edx,%eax
++ movl %eax,12(%esp)
++ fldt 4(%esp)
++ ret
++.size copysignl,.-copysignl
++
++libc_hidden_def(copysignl)
++