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authorDamjan Marion <damarion@cisco.com>2020-05-16 01:48:47 +0200
committerJohn Lo <loj@cisco.com>2020-05-16 02:59:52 +0000
commit97086e18a433cfd8a445fe9112f35e1fc5f5cbb2 (patch)
treef825d3309219e9aeb3385ee4b47e33848faa5a20 /src/vppinfra
parent14a6c0e601b246601954ca18fb44d3cb346e331f (diff)
vppinfra: use byte swap builtins
Type: improvement Change-Id: I438206513b3cc3dedc0241b43c4ce037afa83e2b Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'src/vppinfra')
-rw-r--r--src/vppinfra/byte_order.h44
1 files changed, 3 insertions, 41 deletions
diff --git a/src/vppinfra/byte_order.h b/src/vppinfra/byte_order.h
index 87918f14e5c..9beb4470634 100644
--- a/src/vppinfra/byte_order.h
+++ b/src/vppinfra/byte_order.h
@@ -56,14 +56,7 @@
always_inline u16
clib_byte_swap_u16 (u16 x)
{
-#if defined (__aarch64__)
- if (!__builtin_constant_p (x))
- {
- __asm__ ("rev16 %w0, %w0":"+r" (x));
- return x;
- }
-#endif
- return (x >> 8) | (x << 8);
+ return __builtin_bswap16 (x);
}
always_inline i16
@@ -75,20 +68,7 @@ clib_byte_swap_i16 (i16 x)
always_inline u32
clib_byte_swap_u32 (u32 x)
{
-#if defined (i386) || defined (__x86_64__)
- if (!__builtin_constant_p (x))
- {
- asm volatile ("bswap %0":"=r" (x):"0" (x));
- return x;
- }
-#elif defined (__aarch64__)
- if (!__builtin_constant_p (x))
- {
- __asm__ ("rev %w0, %w0":"+r" (x));
- return x;
- }
-#endif
- return ((x << 24) | ((x & 0xff00) << 8) | ((x >> 8) & 0xff00) | (x >> 24));
+ return __builtin_bswap32 (x);
}
always_inline i32
@@ -100,25 +80,7 @@ clib_byte_swap_i32 (i32 x)
always_inline u64
clib_byte_swap_u64 (u64 x)
{
-#if defined (__x86_64__)
- if (!__builtin_constant_p (x))
- {
- asm volatile ("bswapq %0":"=r" (x):"0" (x));
- return x;
- }
-#elif defined (__aarch64__)
- if (!__builtin_constant_p (x))
- {
- __asm__ ("rev %0, %0":"+r" (x));
- return x;
- }
-#endif
-#define _(x,n,i) \
- ((((x) >> (8*(i))) & 0xff) << (8*((n)-(i)-1)))
- return (_(x, 8, 0) | _(x, 8, 1)
- | _(x, 8, 2) | _(x, 8, 3)
- | _(x, 8, 4) | _(x, 8, 5) | _(x, 8, 6) | _(x, 8, 7));
-#undef _
+ return __builtin_bswap64 (x);
}
always_inline i64