summaryrefslogtreecommitdiff
path: root/sysdeps/i386
diff options
context:
space:
mode:
Diffstat (limited to 'sysdeps/i386')
-rw-r--r--sysdeps/i386/bits/byteswap.h92
-rw-r--r--sysdeps/i386/bits/htontoh.h79
-rw-r--r--sysdeps/i386/htonl.S8
-rw-r--r--sysdeps/i386/htons.S8
-rw-r--r--sysdeps/i386/i486/htonl.S8
5 files changed, 101 insertions, 94 deletions
diff --git a/sysdeps/i386/bits/byteswap.h b/sysdeps/i386/bits/byteswap.h
new file mode 100644
index 0000000000..326962e621
--- /dev/null
+++ b/sysdeps/i386/bits/byteswap.h
@@ -0,0 +1,92 @@
+/* Macros to swap the order of bytes in integer values.
+ Copyright (C) 1997 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#ifndef _BITS_BYTESWAP_H
+#define _BITS_BYTESWAP_H 1
+
+/* Swap bytes in 16 bit value. */
+#define __bswap_constant_16(x) \
+ ((((x) >> 8) & 0xff) | (((x) & 0xff) << 8))
+
+#if defined __GNUC__ && __GNUC__ >= 2
+# define __bswap_16(x) \
+ ({ register unsigned short int __v; \
+ if (__builtin_constant_p (x)) \
+ __v = __bswap_constant_16 (x); \
+ else \
+ __asm__ __volatile__ ("rorw $8, %w0" \
+ : "=q" (__v) \
+ : "0" ((unsigned short int) (x)) \
+ : "cc"); \
+ __v; })
+#else
+/* This is better than nothing. */
+# define __bswap_16(x) __bswap_constant_16 (x)
+#endif
+
+
+/* Swap bytes in 32 bit value. */
+#define __bswap_constant_32(x) \
+ ((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >> 8) | \
+ (((x) & 0x0000ff00) << 8) | (((x) & 0x000000ff) << 24))
+
+#if defined __GNUC__ && __GNUC__ >= 2
+/* To swap the bytes in a word the i486 processors and up provide the
+ `bswap' opcode. On i386 we have to use three instructions. */
+# if !defined __i486__ && !defined __pentium__ && !defined __pentiumpro__
+# define __bswap_32(x) \
+ ({ register unsigned int __v; \
+ if (__builtin_constant_p (x)) \
+ __v = __bswap_constant_32 (x); \
+ else \
+ __asm__ __volatile__ ("rorw $8, %w0;" \
+ "rorl $16, %0;" \
+ "rorw $8, %w0" \
+ : "=q" (__v) \
+ : "0" ((unsigned int) (x)) \
+ : "cc"); \
+ __v; })
+# else
+# define __bswap_32(x) \
+ ({ register unsigned int __v; \
+ if (__builtin_constant_p (x)) \
+ __v = __bswap_constant_32 (x); \
+ else \
+ __asm__ __volatile__ ("bswap %0" \
+ : "=r" (__v) \
+ : "0" ((unsigned int) (x))); \
+ __v; })
+# endif
+#else
+# define __bswap_32(x) __bswap_constant_32 (x)
+#endif
+
+
+#if defined __GNUC__ && __GNUC__ >= 2
+/* Swap bytes in 64 bit value. */
+# define __bswap_64(x) \
+ ({ union { unsigned long long int __ll; \
+ unsigned long int __l[2]; } __v, __r; \
+ __v.__ll = (x); \
+ __r.__l[0] = __bswap_32 (__v.__l[1]); \
+ __r.__l[1] = __bswap_32 (__v.__l[0]); \
+ __r.__ll; })
+#endif
+
+#endif /* bits/byteswap.h */
diff --git a/sysdeps/i386/bits/htontoh.h b/sysdeps/i386/bits/htontoh.h
deleted file mode 100644
index 590b509875..0000000000
--- a/sysdeps/i386/bits/htontoh.h
+++ /dev/null
@@ -1,79 +0,0 @@
-/* Copyright (C) 1997 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If not,
- write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
-
-#ifndef _NETINET_IN_H
-# error "Don't include this file directly, use <netinet/in.h>"
-#endif
-
-#if defined __GNUC__ && __GNUC__ >= 2
-/* We can use inline assembler instructions to optimize the code. */
-
-/* To swap the bytes in a word the i486 processors and up provide the
- `bswap' opcode. On i386 we have to use three instructions. */
-# if !defined __i486__ && !defined __pentium__ && !defined __pentiumpro__
-
-extern __inline u_int32_t
-__ntohl (u_int32_t netlong)
-{
- register u_int32_t hostlong;
-
- __asm__ ("rorw $8, %w0; rorl $16, %0; rorw $8, %w0"
- : "=r" (hostlong)
- : "0" (netlong));
-
- return hostlong;
-}
-
-# else
-
-extern __inline u_int32_t
-__ntohl (u_int32_t netlong)
-{
- register u_int32_t hostlong;
-
- __asm__ ("bswap %0" : "=r" (hostlong) : "0" (netlong));
-
- return hostlong;
-}
-
-# endif
-
-/* For a short word we have a simple solution. */
-extern __inline u_int16_t
-__ntohs (u_int16_t netshort)
-{
- register u_int16_t hostshort;
-
- __asm__ ("rorw $8, %w0" : "=r" (hostshort) : "0" (netshort));
-}
-
-
-/* The other direction can be handled with the same functions. */
-extern __inline u_int32_t
-__htonl (u_int32_t hostlong)
-{
- return __ntohl (hostlong);
-}
-
-extern __inline u_int16_t
-__htons (u_int16_t hostshort)
-{
- return __ntohs (hostshort);
-}
-
-#endif /* GNU CC */
diff --git a/sysdeps/i386/htonl.S b/sysdeps/i386/htonl.S
index 73dd1e9bea..9c87be6392 100644
--- a/sysdeps/i386/htonl.S
+++ b/sysdeps/i386/htonl.S
@@ -26,14 +26,12 @@
*/
.text
-ENTRY (__htonl)
+ENTRY (htonl)
movl 4(%esp), %eax
rorw $8, %ax
rorl $16, %eax
rorw $8, %ax
ret
-END (__htonl)
+END (htonl)
-strong_alias (__htonl, __ntohl)
-weak_alias (__htonl, htonl)
-weak_alias (__ntohl, ntohl)
+weak_alias (htonl, ntohl)
diff --git a/sysdeps/i386/htons.S b/sysdeps/i386/htons.S
index 5d0f59c92b..b0539c55cd 100644
--- a/sysdeps/i386/htons.S
+++ b/sysdeps/i386/htons.S
@@ -26,13 +26,11 @@
*/
.text
-ENTRY (__htons)
+ENTRY (htons)
movl 4(%esp), %eax
andl $0xffff, %eax
rorw $8, %ax
ret
-END (__htons)
+END (htons)
-strong_alias (__htons, __ntohs)
-weak_alias (__htons, htons)
-weak_alias (__ntohs, ntohs)
+weak_alias (htons, ntohs)
diff --git a/sysdeps/i386/i486/htonl.S b/sysdeps/i386/i486/htonl.S
index cf3a94fc76..a61b339b81 100644
--- a/sysdeps/i386/i486/htonl.S
+++ b/sysdeps/i386/i486/htonl.S
@@ -26,12 +26,10 @@
*/
.text
-ENTRY (__htonl)
+ENTRY (htonl)
movl 4(%esp), %eax
bswap %eax
ret
-END (__htonl)
+END (htonl)
-strong_alias (__htonl, __ntohl)
-weak_alias (__htonl, htonl)
-weak_alias (__ntohl, ntohl)
+weak_alias (htonl, ntohl)
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-27 13:54:29 +0000