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[Qemu-devel] [PULL v2 2/9] move const_le{16, 23} to qemu/bswap.h, add co
From: |
Gerd Hoffmann |
Subject: |
[Qemu-devel] [PULL v2 2/9] move const_le{16, 23} to qemu/bswap.h, add comment |
Date: |
Wed, 13 Apr 2016 17:44:56 +0200 |
Signed-off-by: Gerd Hoffmann <address@hidden>
Reviewed-by: Eric Blake <address@hidden>
Message-id: address@hidden
---
include/hw/virtio/virtio-input.h | 14 --------------
include/qemu/bswap.h | 19 +++++++++++++++++++
2 files changed, 19 insertions(+), 14 deletions(-)
diff --git a/include/hw/virtio/virtio-input.h b/include/hw/virtio/virtio-input.h
index 169adee..1b414c4 100644
--- a/include/hw/virtio/virtio-input.h
+++ b/include/hw/virtio/virtio-input.h
@@ -13,20 +13,6 @@ typedef struct virtio_input_absinfo virtio_input_absinfo;
typedef struct virtio_input_config virtio_input_config;
typedef struct virtio_input_event virtio_input_event;
-#if defined(HOST_WORDS_BIGENDIAN)
-# define const_le32(_x) \
- ((((_x) & 0x000000ffU) << 24) | \
- (((_x) & 0x0000ff00U) << 8) | \
- (((_x) & 0x00ff0000U) >> 8) | \
- (((_x) & 0xff000000U) >> 24))
-# define const_le16(_x) \
- ((((_x) & 0x00ff) << 8) | \
- (((_x) & 0xff00) >> 8))
-#else
-# define const_le32(_x) (_x)
-# define const_le16(_x) (_x)
-#endif
-
/* ----------------------------------------------------------------- */
/* qemu internals */
diff --git a/include/qemu/bswap.h b/include/qemu/bswap.h
index fcedf0d..ce3c42e 100644
--- a/include/qemu/bswap.h
+++ b/include/qemu/bswap.h
@@ -125,6 +125,25 @@ static inline uint32_t qemu_bswap_len(uint32_t value, int
len)
return bswap32(value) >> (32 - 8 * len);
}
+/*
+ * Same as cpu_to_le{16,23}, except that gcc will figure the result is
+ * a compile-time constant if you pass in a constant. So this can be
+ * used to initialize static variables.
+ */
+#if defined(HOST_WORDS_BIGENDIAN)
+# define const_le32(_x) \
+ ((((_x) & 0x000000ffU) << 24) | \
+ (((_x) & 0x0000ff00U) << 8) | \
+ (((_x) & 0x00ff0000U) >> 8) | \
+ (((_x) & 0xff000000U) >> 24))
+# define const_le16(_x) \
+ ((((_x) & 0x00ff) << 8) | \
+ (((_x) & 0xff00) >> 8))
+#else
+# define const_le32(_x) (_x)
+# define const_le16(_x) (_x)
+#endif
+
/* Unions for reinterpreting between floats and integers. */
typedef union {
--
1.8.3.1
- [Qemu-devel] [PULL v2 0/9] virtio-input; live migration support, various bugfixes, Gerd Hoffmann, 2016/04/13
- [Qemu-devel] [PULL v2 7/9] virtio-input: fix emulated tablet axis ranges, Gerd Hoffmann, 2016/04/13
- [Qemu-devel] [PULL v2 9/9] virtio-input: support absolute axis config in pass-through, Gerd Hoffmann, 2016/04/13
- [Qemu-devel] [PULL v2 6/9] virtio-input: add live migration support, Gerd Hoffmann, 2016/04/13
- [Qemu-devel] [PULL v2 2/9] move const_le{16, 23} to qemu/bswap.h, add comment,
Gerd Hoffmann <=
- [Qemu-devel] [PULL v2 1/9] virtio-input: add parenthesis to const_le{16, 32}, Gerd Hoffmann, 2016/04/13
- [Qemu-devel] [PULL v2 3/9] virtio-input: add missing key mappings, Gerd Hoffmann, 2016/04/13
- [Qemu-devel] [PULL v2 8/9] input-linux: refine mouse detection, Gerd Hoffmann, 2016/04/13
- [Qemu-devel] [PULL v2 5/9] virtio-input: implement pass-through evdev writes, Gerd Hoffmann, 2016/04/13
- [Qemu-devel] [PULL v2 4/9] virtio-input: retrieve EV_LED host config bits, Gerd Hoffmann, 2016/04/13
- Re: [Qemu-devel] [PULL v2 0/9] virtio-input; live migration support, various bugfixes, Peter Maydell, 2016/04/14