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authorThiemo Seufer <ths@networkno.de>2005-07-08 11:17:05 +0200
committerRalf Baechle <ralf@linux-mips.org>2005-10-29 20:31:40 +0200
commit04988d6fda5c1cc670bd4c4d563b3443cf7ccce7 (patch)
treedc3ead52d31bb9014f1f8ebea75525364d699b15 /include/asm-mips/checksum.h
parentFix get_saved_sp for 64bit address space. Simplify set_save_sp. (diff)
downloadlinux-04988d6fda5c1cc670bd4c4d563b3443cf7ccce7.tar.xz
linux-04988d6fda5c1cc670bd4c4d563b3443cf7ccce7.zip
Protect noat assembly with .set push/pop and make it somewhat readable.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Thiemo Seufer <ths@networkno.de>
Diffstat (limited to 'include/asm-mips/checksum.h')
-rw-r--r--include/asm-mips/checksum.h154
1 files changed, 78 insertions, 76 deletions
diff --git a/include/asm-mips/checksum.h b/include/asm-mips/checksum.h
index 436d26cd6f6f..2ff53db8c023 100644
--- a/include/asm-mips/checksum.h
+++ b/include/asm-mips/checksum.h
@@ -71,14 +71,15 @@ unsigned int csum_partial_copy_nocheck(const unsigned char *src, unsigned char *
static inline unsigned short int csum_fold(unsigned int sum)
{
__asm__(
- ".set\tnoat\t\t\t# csum_fold\n\t"
- "sll\t$1,%0,16\n\t"
- "addu\t%0,$1\n\t"
- "sltu\t$1,%0,$1\n\t"
- "srl\t%0,%0,16\n\t"
- "addu\t%0,$1\n\t"
- "xori\t%0,0xffff\n\t"
- ".set\tat"
+ " .set push # csum_fold\n"
+ " .set noat \n"
+ " sll $1, %0, 16 \n"
+ " addu %0, $1 \n"
+ " sltu $1, %0, $1 \n"
+ " srl %0, %0, 16 \n"
+ " addu %0, $1 \n"
+ " xori %0, 0xffff \n"
+ " .set pop"
: "=r" (sum)
: "0" (sum));
@@ -128,29 +129,30 @@ static inline unsigned int csum_tcpudp_nofold(unsigned long saddr,
unsigned int sum)
{
__asm__(
- ".set\tnoat\t\t\t# csum_tcpudp_nofold\n\t"
+ " .set push # csum_tcpudp_nofold\n"
+ " .set noat \n"
#ifdef CONFIG_32BIT
- "addu\t%0, %2\n\t"
- "sltu\t$1, %0, %2\n\t"
- "addu\t%0, $1\n\t"
+ " addu %0, %2 \n"
+ " sltu $1, %0, %2 \n"
+ " addu %0, $1 \n"
- "addu\t%0, %3\n\t"
- "sltu\t$1, %0, %3\n\t"
- "addu\t%0, $1\n\t"
+ " addu %0, %3 \n"
+ " sltu $1, %0, %3 \n"
+ " addu %0, $1 \n"
- "addu\t%0, %4\n\t"
- "sltu\t$1, %0, %4\n\t"
- "addu\t%0, $1\n\t"
+ " addu %0, %4 \n"
+ " sltu $1, %0, %4 \n"
+ " addu %0, $1 \n"
#endif
#ifdef CONFIG_64BIT
- "daddu\t%0, %2\n\t"
- "daddu\t%0, %3\n\t"
- "daddu\t%0, %4\n\t"
- "dsll32\t$1, %0, 0\n\t"
- "daddu\t%0, $1\n\t"
- "dsrl32\t%0, %0, 0\n\t"
+ " daddu %0, %2 \n"
+ " daddu %0, %3 \n"
+ " daddu %0, %4 \n"
+ " dsll32 $1, %0, 0 \n"
+ " daddu %0, $1 \n"
+ " dsrl32 %0, %0, 0 \n"
#endif
- ".set\tat"
+ " .set pop"
: "=r" (sum)
: "0" (daddr), "r"(saddr),
#ifdef __MIPSEL__
@@ -193,57 +195,57 @@ static __inline__ unsigned short int csum_ipv6_magic(struct in6_addr *saddr,
unsigned int sum)
{
__asm__(
- ".set\tpush\t\t\t# csum_ipv6_magic\n\t"
- ".set\tnoreorder\n\t"
- ".set\tnoat\n\t"
- "addu\t%0, %5\t\t\t# proto (long in network byte order)\n\t"
- "sltu\t$1, %0, %5\n\t"
- "addu\t%0, $1\n\t"
-
- "addu\t%0, %6\t\t\t# csum\n\t"
- "sltu\t$1, %0, %6\n\t"
- "lw\t%1, 0(%2)\t\t\t# four words source address\n\t"
- "addu\t%0, $1\n\t"
- "addu\t%0, %1\n\t"
- "sltu\t$1, %0, %1\n\t"
-
- "lw\t%1, 4(%2)\n\t"
- "addu\t%0, $1\n\t"
- "addu\t%0, %1\n\t"
- "sltu\t$1, %0, %1\n\t"
-
- "lw\t%1, 8(%2)\n\t"
- "addu\t%0, $1\n\t"
- "addu\t%0, %1\n\t"
- "sltu\t$1, %0, %1\n\t"
-
- "lw\t%1, 12(%2)\n\t"
- "addu\t%0, $1\n\t"
- "addu\t%0, %1\n\t"
- "sltu\t$1, %0, %1\n\t"
-
- "lw\t%1, 0(%3)\n\t"
- "addu\t%0, $1\n\t"
- "addu\t%0, %1\n\t"
- "sltu\t$1, %0, %1\n\t"
-
- "lw\t%1, 4(%3)\n\t"
- "addu\t%0, $1\n\t"
- "addu\t%0, %1\n\t"
- "sltu\t$1, %0, %1\n\t"
-
- "lw\t%1, 8(%3)\n\t"
- "addu\t%0, $1\n\t"
- "addu\t%0, %1\n\t"
- "sltu\t$1, %0, %1\n\t"
-
- "lw\t%1, 12(%3)\n\t"
- "addu\t%0, $1\n\t"
- "addu\t%0, %1\n\t"
- "sltu\t$1, %0, %1\n\t"
-
- "addu\t%0, $1\t\t\t# Add final carry\n\t"
- ".set\tpop"
+ " .set push # csum_ipv6_magic\n"
+ " .set noreorder \n"
+ " .set noat \n"
+ " addu %0, %5 # proto (long in network byte order)\n"
+ " sltu $1, %0, %5 \n"
+ " addu %0, $1 \n"
+
+ " addu %0, %6 # csum\n"
+ " sltu $1, %0, %6 \n"
+ " lw %1, 0(%2) # four words source address\n"
+ " addu %0, $1 \n"
+ " addu %0, %1 \n"
+ " sltu $1, %0, %1 \n"
+
+ " lw %1, 4(%2) \n"
+ " addu %0, $1 \n"
+ " addu %0, %1 \n"
+ " sltu $1, %0, %1 \n"
+
+ " lw %1, 8(%2) \n"
+ " addu %0, $1 \n"
+ " addu %0, %1 \n"
+ " sltu $1, %0, %1 \n"
+
+ " lw %1, 12(%2) \n"
+ " addu %0, $1 \n"
+ " addu %0, %1 \n"
+ " sltu $1, %0, %1 \n"
+
+ " lw %1, 0(%3) \n"
+ " addu %0, $1 \n"
+ " addu %0, %1 \n"
+ " sltu $1, %0, %1 \n"
+
+ " lw %1, 4(%3) \n"
+ " addu %0, $1 \n"
+ " addu %0, %1 \n"
+ " sltu $1, %0, %1 \n"
+
+ " lw %1, 8(%3) \n"
+ " addu %0, $1 \n"
+ " addu %0, %1 \n"
+ " sltu $1, %0, %1 \n"
+
+ " lw %1, 12(%3) \n"
+ " addu %0, $1 \n"
+ " addu %0, %1 \n"
+ " sltu $1, %0, %1 \n"
+
+ " addu %0, $1 # Add final carry\n"
+ " .set pop"
: "=r" (sum), "=r" (proto)
: "r" (saddr), "r" (daddr),
"0" (htonl(len)), "1" (htonl(proto)), "r" (sum));