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optimize 16- and 32-bit moves

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function                                             old     new   delta
udhcpd_main                                         1239    1257     +18
udhcp_add_simple_option                               93      92      -1
buffer_read_le_u32                                    19      18      -1
unpack_gz_stream_with_info                           526     520      -6
dnsd_main                                           1470    1463      -7
udhcp_run_script                                    1208    1186     -22
send_ACK                                             255     229     -26
arping_main                                         1661    1623     -38
send_offer                                           470     428     -42
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/8 up/down: 18/-143)          Total: -125 bytes
This commit is contained in:
Denis Vlasenko
2008-12-08 22:56:18 +00:00
parent d1a84a2880
commit efb545b9bd
13 changed files with 97 additions and 77 deletions
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2
networking/dnsd.c
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@@ -253,7 +253,7 @@ static int process_packet(uint8_t *buf)
goto empty_packet;
}
v32 = a.s_addr; /* in case long != int */
memcpy(answstr, &v32, 4);
move_to_unaligned32(answstr, v32);
outr_rlen = 4; // uint32_t IP
} else
outr_rlen = strlen((char *)answstr) + 1; // a host name