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authorWaldemar Brodkorb <wbx@uclibc-ng.org>2016-01-07 22:35:57 (GMT)
committerWaldemar Brodkorb <wbx@uclibc-ng.org>2016-01-10 07:39:19 (GMT)
commit48d8d11d697e7433e607b2519a022bd0ee415c12 (patch)
tree9ebc11daff193639a085eac26d7aae35fd38c8c7
parentad1fca9b927f469e2fecdfbfa4e3ad130afa66ab (diff)
Add implementation for copysignl for i386
Patch from OpenWrt. Reported-by: Leonid Lisovskiy <lly.dev@gmail.com>
-rw-r--r--libc/sysdeps/linux/i386/Makefile.arch3
-rw-r--r--libc/sysdeps/linux/i386/copysign.S55
2 files changed, 57 insertions, 1 deletions
diff --git a/libc/sysdeps/linux/i386/Makefile.arch b/libc/sysdeps/linux/i386/Makefile.arch
index 581e10a..1c72d23 100644
--- a/libc/sysdeps/linux/i386/Makefile.arch
+++ b/libc/sysdeps/linux/i386/Makefile.arch
@@ -9,7 +9,8 @@ CSRC-y := brk.c __syscall_error.c sigaction.c
SSRC-y := \
__longjmp.S setjmp.S bsd-setjmp.S bsd-_setjmp.S \
- sync_file_range.S syscall.S mmap.S
+ sync_file_range.S syscall.S mmap.S \
+ copysign.S
SSRC-$(UCLIBC_HAS_LFS) += mmap64.S
SSRC-$(if $(findstring yy,$(UCLIBC_HAS_ADVANCED_REALTIME)$(UCLIBC_HAS_LFS)),y) += posix_fadvise64.S
diff --git a/libc/sysdeps/linux/i386/copysign.S b/libc/sysdeps/linux/i386/copysign.S
new file mode 100644
index 0000000..6499ce0
--- /dev/null
+++ b/libc/sysdeps/linux/i386/copysign.S
@@ -0,0 +1,55 @@
+/*
+ * 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)
+
+.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)
+
+.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)
+