Commit 4f385652 authored by Andy Polyakov's avatar Andy Polyakov
Browse files

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

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].
parent 4407700c

crypto/bn/bn_lcl.h

+16 −3
Original line number Diff line number Diff line
@@ -238,7 +238,7 @@ extern "C" { 
#  if defined(__DECC)

#   include <c_asm.h>

#   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)	({	\

	register BN_ULONG ret;		\

	asm ("umulh	%1,%2,%0"	\
@@ -247,7 +247,7 @@ extern "C" { 
	ret;			})

#  endif	/* compiler */

# 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)	({	\

	register BN_ULONG ret;		\

	asm ("mulhdu	%0,%1,%2"	\
@@ -257,7 +257,7 @@ extern "C" { 
#  endif	/* compiler */

# elif (defined(__x86_64) || defined(__x86_64__)) && \

       (defined(SIXTY_FOUR_BIT_LONG) || defined(SIXTY_FOUR_BIT))

#  if defined(__GNUC__)

#  if defined(__GNUC__) && __GNUC__>=2

#   define BN_UMULT_HIGH(a,b)	({	\

	register BN_ULONG ret,discard;	\

	asm ("mulq	%3"		\
@@ -280,6 +280,19 @@ extern "C" { 
#   define BN_UMULT_HIGH(a,b)		__umulh((a),(b))

#   define BN_UMULT_LOHI(low,high,a,b)	((low)=_umul128((a),(b),&(high)))

#  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		/* OPENSSL_NO_ASM */