top,pmap: speed up /smaps parsing

function                                             old     new   delta
procps_read_smaps                                    515     529     +14
procps_get_maps                                      685     665     -20
.rodata                                           105847  105820     -27
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/2 up/down: 14/-47)            Total: -33 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/include/platform.h b/include/platform.h
index e10c5b558..a5b61757f 100644
--- a/include/platform.h
+++ b/include/platform.h
@@ -209,6 +209,8 @@
 # define SWAP_LE64(x) bb_bswap_64(x)
 # define IF_BIG_ENDIAN(...) __VA_ARGS__
 # define IF_LITTLE_ENDIAN(...)
+/* How do bytes a,b,c,d (sequential in memory) look if fetched into uint32_t? */
+# define PACK32_BYTES(a,b,c,d) (uint32_t)((d)+((c)<<8)+((b)<<16)+((a)<<24))
 #else
 # define SWAP_BE16(x) bswap_16(x)
 # define SWAP_BE32(x) bswap_32(x)
@@ -218,6 +220,7 @@
 # define SWAP_LE64(x) (x)
 # define IF_BIG_ENDIAN(...)
 # define IF_LITTLE_ENDIAN(...) __VA_ARGS__
+# define PACK32_BYTES(a,b,c,d) (uint32_t)((a)+((b)<<8)+((c)<<16)+((d)<<24))
 #endif