From 76a2110b473c12eb7a9c9e5d15d54309db5f8b9c Mon Sep 17 00:00:00 2001
From: Sebastian Huber <sebastian.huber@embedded-brains.de>
Date: Mon, 18 Apr 2016 15:29:21 +0200
Subject: BSD compatibility for <machine/endian.h>

Introduce <machine/_endian.h> to let target based customization of
<machine/endian.h> via

 * _LITTLE_ENDIAN,
 * _BIG_ENDIAN,
 * _PDP_ENDIAN, and
 * _BYTE_ORDER.

defines.  Add definitions expected by FreeBSD to
<machine/endian.h> like

 * _QUAD_HIGHWORD,
 * _QUAD_LOWWORD,
 * __bswap16(),
 * __bswap32(),
 * __bswap64(),
 * __htonl(),
 * __htons(),
 * __ntohl(), and
 * __ntohs().

Also, if __BSD_VISIBLE

 * LITTLE_ENDIAN,
 * BIG_ENDIAN,
 * PDP_ENDIAN, and
 * BYTE_ORDER.

Targets that define __machine_host_to_from_network_defined in
<machine/_endian.h> must provide their own implementation of

 * __htonl(),
 * __htons(),
 * __ntohl(), and
 * __ntohs(),

otherwise a default implementation is provided by <machine/endian.h>.
In case of GCC defines to builtins are used.

Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
---
 winsup/cygwin/include/asm/byteorder.h | 24 +-----------------------
 1 file changed, 1 insertion(+), 23 deletions(-)

(limited to 'winsup/cygwin/include/asm/byteorder.h')

diff --git a/winsup/cygwin/include/asm/byteorder.h b/winsup/cygwin/include/asm/byteorder.h
index 4f5d7cb59..14529bfa2 100644
--- a/winsup/cygwin/include/asm/byteorder.h
+++ b/winsup/cygwin/include/asm/byteorder.h
@@ -11,9 +11,8 @@ details. */
 #ifndef _I386_BYTEORDER_H
 #define _I386_BYTEORDER_H
 
-#include <_ansi.h>
 #include <stdint.h>
-#include <bits/endian.h>
+#include <machine/endian.h>
 
 #ifdef __cplusplus
 extern "C" {
@@ -28,37 +27,16 @@ extern uint16_t	ntohs(uint16_t);
 extern uint32_t	htonl(uint32_t);
 extern uint16_t	htons(uint16_t);
 
-_ELIDABLE_INLINE uint32_t __ntohl(uint32_t);
-_ELIDABLE_INLINE uint16_t __ntohs(uint16_t);
-
-_ELIDABLE_INLINE uint32_t
-__ntohl(uint32_t x)
-{
-	__asm__("bswap %0" : "=r" (x) : "0" (x));
-	return x;
-}
-
 #define __constant_ntohl(x) \
 	((uint32_t)((((uint32_t)(x) & 0x000000ffU) << 24) | \
 		   (((uint32_t)(x) & 0x0000ff00U) <<  8) | \
 		   (((uint32_t)(x) & 0x00ff0000U) >>  8) | \
 		   (((uint32_t)(x) & 0xff000000U) >> 24)))
 
-_ELIDABLE_INLINE uint16_t
-__ntohs(uint16_t x)
-{
-	__asm__("xchgb %b0,%h0"		/* swap bytes		*/
-		: "=Q" (x)
-		:  "0" (x));
-	return x;
-}
-
 #define __constant_ntohs(x) \
 	((uint16_t)((((uint16_t)(x) & 0x00ff) << 8) | \
 		   (((uint16_t)(x) & 0xff00) >> 8))) \
 
-#define __htonl(x) __ntohl(x)
-#define __htons(x) __ntohs(x)
 #define __constant_htonl(x) __constant_ntohl(x)
 #define __constant_htons(x) __constant_ntohs(x)
 
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