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- Fix spelling and style.

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- Use __FBSDID.
This commit is contained in:
Marius Strobl 2008-07-05 15:30:07 +00:00
parent 6a92796332
commit 681f038fd9
1 changed files with 26 additions and 21 deletions
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47
sys/sparc64/sparc64/in_cksum.c
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@ -57,6 +57,9 @@
* $FreeBSD$
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
@ -73,10 +76,10 @@
* This routine is very heavily used in the network
* code and should be modified for each CPU to be as fast as possible.
*
* This implementation is a sparc64 version. Most code was taken over and
* adapted from the i386. Some optimizations were changed to achieve (hopefully)
* better performance.
* This uses 64 bit loads, but 32 bit additions due to the lack of a 64-bit
* This implementation is a sparc64 version. Most code was taken over
* and adapted from the i386. Some optimizations were changed to achieve
* (hopefully) better performance.
* This uses 64-bit loads, but 32-bit additions due to the lack of a 64-bit
* add-with-carry operation.
*/
@ -84,28 +87,28 @@
* REDUCE() is actually not used that frequently... maybe a C implementation
* would suffice.
*/
#define REDUCE(sum, tmp) __asm __volatile( \
"sll %2, 16, %1\n" \
"addcc %2, %1, %0\n" \
"srl %0, 16, %0\n" \
#define REDUCE(sum, tmp) __asm __volatile( \
"sll %2, 16, %1\n" \
"addcc %2, %1, %0\n" \
"srl %0, 16, %0\n" \
"addc %0, 0, %0" : "=r" (sum), "=r" (tmp) : "0" (sum))
/*
* Note that some of these macros depend on the flags being preserved between
* calls, so they should not be intermixed with other C statements.
* Note that some of these macros depend on the flags being preserved
* between calls, so they should not be intermixed with other C statements.
*/
#define LD64_ADD32(sum, tmp, addr, n, mod) __asm __volatile( \
"ldx [%3 + " #n "], %1\n" \
"add" #mod " %2, %1, %0\n" \
"srlx %1, 32, %1\n" \
#define LD64_ADD32(sum, tmp, addr, n, mod) __asm __volatile( \
"ldx [%3 + " #n "], %1\n" \
"add" #mod " %2, %1, %0\n" \
"srlx %1, 32, %1\n" \
"addccc %0, %1, %0" : "=r" (sum), "=r" (tmp) : "0" (sum), "r" (addr))
#define LD32_ADD32(sum, tmp, addr, n, mod) __asm __volatile( \
"lduw [%3 + " #n "], %1\n" \
"add" #mod " %2, %1, %0\n" \
#define LD32_ADD32(sum, tmp, addr, n, mod) __asm __volatile( \
"lduw [%3 + " #n "], %1\n" \
"add" #mod " %2, %1, %0\n" \
: "=r" (sum), "=r" (tmp) : "0" (sum), "r" (addr))
#define MOP(sum) __asm __volatile( \
#define MOP(sum) __asm __volatile( \
"addc %1, 0, %0" : "=r" (sum) : "0" (sum))
u_short
@ -229,7 +232,7 @@ skip_start:
} else if (mlen == -1) {
/*
* This mbuf has odd number of bytes.
* There could be a word split betwen
* There could be a word split between
* this mbuf and the next mbuf.
* Save the last byte (to prepend to next mbuf).
*/
@ -240,8 +243,10 @@ skip_start:
if (len)
printf("%s: out of data by %d\n", __func__, len);
if (mlen == -1) {
/* The last mbuf has odd # of bytes. Follow the
standard (the odd byte is shifted left by 8 bits) */
/*
* The last mbuf has odd # of bytes. Follow the
* standard (the odd byte is shifted left by 8 bits).
*/
sum += su & 0xff00;
}
REDUCE(sum, tmp);