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eal: explicit cast in constant byte swap

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GCC 8.1 warns:

rte_byteorder.h: In function 'rte_constant_bswap16':
rte_byteorder.h:54:45: warning: conversion from
'int' to 'uint16_t' {aka 'short unsigned int'}
may change value [-Wconversion]
  ((((uint16_t)(v) & UINT16_C(0x00ff)) << 8) | \
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
   (((uint16_t)(v) & UINT16_C(0xff00)) >> 8))
   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
rte_byteorder.h:126:9: note: in expansion of macro
'RTE_STATIC_BSWAP16'
  return RTE_STATIC_BSWAP16(x);
         ^~~~~~~~~~~~~~~~~~

The other two sizes are going to be afflicted the
same, so get the same fix.

Fixes: b75667ef9f7e ("eal: add static endianness conversion macros")
Cc: stable@dpdk.org

Signed-off-by: Andy Green <andy@warmcat.com>
This commit is contained in:
Andy Green 2018-05-17 21:50:37 +08:00 committed by Thomas Monjalon
parent d3db77d7d8
commit c7bf809382
1 changed files with 3 additions and 3 deletions
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6
lib/librte_eal/common/include/generic/rte_byteorder.h
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@ -123,7 +123,7 @@ typedef uint64_t rte_le64_t; /**< 64-bit little-endian value. */
static inline uint16_t
rte_constant_bswap16(uint16_t x)
{
return RTE_STATIC_BSWAP16(x);
return (uint16_t)RTE_STATIC_BSWAP16(x);
}
/*
@ -135,7 +135,7 @@ rte_constant_bswap16(uint16_t x)
static inline uint32_t
rte_constant_bswap32(uint32_t x)
{
return RTE_STATIC_BSWAP32(x);
return (uint32_t)RTE_STATIC_BSWAP32(x);
}
/*
@ -147,7 +147,7 @@ rte_constant_bswap32(uint32_t x)
static inline uint64_t
rte_constant_bswap64(uint64_t x)
{
return RTE_STATIC_BSWAP64(x);
return (uint64_t)RTE_STATIC_BSWAP64(x);
}