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bn_lcl.h: add MIPS III-specific BN_UMULT_LOHI as alternative to porting

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crypto/bn/asm/mips3.s from IRIX. Performance improvement is not as
impressive as with complete assembler, but still... it's almost 2.5x
[on R5000].
This commit is contained in:
Andy Polyakov 2010-01-17 12:08:24 +00:00
parent 4407700c40
commit 4f38565204
1 changed files with 16 additions and 3 deletions
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19
crypto/bn/bn_lcl.h
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@ -238,7 +238,7 @@ extern "C" {
# if defined(__DECC) # if defined(__DECC)
# include <c_asm.h> # include <c_asm.h>
# define BN_UMULT_HIGH(a,b) (BN_ULONG)asm("umulh %a0,%a1,%v0",(a),(b)) # define BN_UMULT_HIGH(a,b) (BN_ULONG)asm("umulh %a0,%a1,%v0",(a),(b))
# elif defined(__GNUC__) # elif defined(__GNUC__) && __GNUC__>=2
# define BN_UMULT_HIGH(a,b) ({ \ # define BN_UMULT_HIGH(a,b) ({ \
register BN_ULONG ret; \ register BN_ULONG ret; \
asm ("umulh %1,%2,%0" \ asm ("umulh %1,%2,%0" \
@ -247,7 +247,7 @@ extern "C" {
ret; }) ret; })
# endif /* compiler */ # endif /* compiler */
# elif defined(_ARCH_PPC) && defined(__64BIT__) && defined(SIXTY_FOUR_BIT_LONG) # elif defined(_ARCH_PPC) && defined(__64BIT__) && defined(SIXTY_FOUR_BIT_LONG)
# if defined(__GNUC__) # if defined(__GNUC__) && __GNUC__>=2
# define BN_UMULT_HIGH(a,b) ({ \ # define BN_UMULT_HIGH(a,b) ({ \
register BN_ULONG ret; \ register BN_ULONG ret; \
asm ("mulhdu %0,%1,%2" \ asm ("mulhdu %0,%1,%2" \
@ -257,7 +257,7 @@ extern "C" {
# endif /* compiler */ # endif /* compiler */
# elif (defined(__x86_64) || defined(__x86_64__)) && \ # elif (defined(__x86_64) || defined(__x86_64__)) && \
(defined(SIXTY_FOUR_BIT_LONG) || defined(SIXTY_FOUR_BIT)) (defined(SIXTY_FOUR_BIT_LONG) || defined(SIXTY_FOUR_BIT))
# if defined(__GNUC__) # if defined(__GNUC__) && __GNUC__>=2
# define BN_UMULT_HIGH(a,b) ({ \ # define BN_UMULT_HIGH(a,b) ({ \
register BN_ULONG ret,discard; \ register BN_ULONG ret,discard; \
asm ("mulq %3" \ asm ("mulq %3" \
@ -280,6 +280,19 @@ extern "C" {
# define BN_UMULT_HIGH(a,b) __umulh((a),(b)) # define BN_UMULT_HIGH(a,b) __umulh((a),(b))
# define BN_UMULT_LOHI(low,high,a,b) ((low)=_umul128((a),(b),&(high))) # define BN_UMULT_LOHI(low,high,a,b) ((low)=_umul128((a),(b),&(high)))
# endif # endif
# elif defined(__mips) && (defined(SIXTY_FOUR_BIT) || defined(SIXTY_FOUR_BIT_LONG))
# if defined(__GNUC__) && __GNUC__>=2
# define BN_UMULT_HIGH(a,b) ({ \
register BN_ULONG ret; \
asm ("dmultu %1,%2" \
: "=h"(ret) \
: "r"(a), "r"(b) : "l"); \
ret; })
# define BN_UMULT_LOHI(low,high,a,b) \
asm ("dmultu %2,%3" \
: "=l"(low),"=h"(high) \
: "r"(a), "r"(b));
# endif
# endif /* cpu */ # endif /* cpu */
#endif /* OPENSSL_NO_ASM */ #endif /* OPENSSL_NO_ASM */