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Clobber "cc" instead of using volatile; remove obsolete register keyword.

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Submitted by:	Christoph Mallon
This commit is contained in:
Ed Schouten 2009-06-13 14:00:10 +00:00
parent 3c7553cc20
commit 4ec1748cfe
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=194111
1 changed files with 8 additions and 7 deletions
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15
sys/i386/include/in_cksum.h
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@ -57,9 +57,9 @@
static __inline u_int
in_cksum_hdr(const struct ip *ip)
{
register u_int sum = 0;
u_int sum = 0;
__asm __volatile (
__asm(
"addl %1, %0\n"
"adcl %2, %0\n"
"adcl %3, %0\n"
@ -72,6 +72,7 @@ in_cksum_hdr(const struct ip *ip)
"g" (((const u_int32_t *)ip)[2]),
"g" (((const u_int32_t *)ip)[3]),
"g" (((const u_int32_t *)ip)[4])
: "cc"
);
sum = (sum & 0xffff) + (sum >> 16);
if (sum > 0xffff)
@ -91,12 +92,12 @@ in_cksum_update(struct ip *ip)
static __inline u_short
in_addword(u_short sum, u_short b)
{
/* __volatile is necessary because the condition codes are used. */
__asm __volatile (
__asm(
"addw %1, %0\n"
"adcw $0, %0"
: "+r" (sum)
: "r" (b)
: "g" (b)
: "cc"
);
return (sum);
}
@ -104,14 +105,14 @@ in_addword(u_short sum, u_short b)
static __inline u_short
in_pseudo(u_int sum, u_int b, u_int c)
{
/* __volatile is necessary because the condition codes are used. */
__asm __volatile (
__asm(
"addl %1, %0\n"
"adcl %2, %0\n"
"adcl $0, %0"
: "+r" (sum)
: "g" (b),
"g" (c)
: "cc"
);
sum = (sum & 0xffff) + (sum >> 16);
if (sum > 0xffff)