Add linux-x32 target.

Configure

@@ -358,6 +358,7 @@ my %table=(
 "linux-ia64-ecc","ecc:-DL_ENDIAN -DTERMIO -O2 -Wall -no_cpprt::-D_REENTRANT::-ldl:SIXTY_FOUR_BIT_LONG RC4_CHUNK DES_INT:${ia64_asm}:dlfcn:linux-shared:-fPIC::.so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
 "linux-ia64-icc","icc:-DL_ENDIAN -DTERMIO -O2 -Wall -no_cpprt::-D_REENTRANT::-ldl:SIXTY_FOUR_BIT_LONG RC4_CHUNK DES_RISC1 DES_INT:${ia64_asm}:dlfcn:linux-shared:-fPIC::.so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
 "linux-x86_64",	"gcc:-m64 -DL_ENDIAN -DTERMIO -O3 -Wall::-D_REENTRANT::-ldl:SIXTY_FOUR_BIT_LONG RC4_CHUNK DES_INT DES_UNROLL:${x86_64_asm}:elf:dlfcn:linux-shared:-fPIC:-m64:.so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR):::64",
+"linux-x32",	"gcc:-mx32 -DL_ENDIAN -DTERMIO -O3 -Wall::-D_REENTRANT::-ldl:SIXTY_FOUR_BIT RC4_CHUNK_LL DES_INT DES_UNROLL:${x86_64_asm}:elf:dlfcn:linux-shared:-fPIC:-mx32:.so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR):::x32:",
 "linux64-s390x",	"gcc:-m64 -DB_ENDIAN -DTERMIO -O3 -Wall::-D_REENTRANT::-ldl:SIXTY_FOUR_BIT_LONG RC4_CHAR RC4_CHUNK DES_INT DES_UNROLL:${s390x_asm}:64:dlfcn:linux-shared:-fPIC:-m64:.so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR):::64",
 #### So called "highgprs" target for z/Architecture CPUs
 # "Highgprs" is kernel feature first implemented in Linux 2.6.32, see

TABLE

@@ -4323,6 +4323,39 @@ $ranlib       =
 $arflags      = 
 $multilib     = 
 
+*** linux-x32
+$cc           = gcc
+$cflags       = -mx32 -DL_ENDIAN -DTERMIO -O3 -Wall
+$unistd       = 
+$thread_cflag = -D_REENTRANT
+$sys_id       = 
+$lflags       = -ldl
+$bn_ops       = SIXTY_FOUR_BIT RC4_CHUNK_LL DES_INT DES_UNROLL
+$cpuid_obj    = x86_64cpuid.o
+$bn_obj       = x86_64-gcc.o x86_64-mont.o x86_64-mont5.o x86_64-gf2m.o modexp512-x86_64.o
+$des_obj      = 
+$aes_obj      = aes-x86_64.o vpaes-x86_64.o bsaes-x86_64.o aesni-x86_64.o aesni-sha1-x86_64.o
+$bf_obj       = 
+$md5_obj      = md5-x86_64.o
+$sha1_obj     = sha1-x86_64.o sha256-x86_64.o sha512-x86_64.o
+$cast_obj     = 
+$rc4_obj      = rc4-x86_64.o rc4-md5-x86_64.o
+$rmd160_obj   = 
+$rc5_obj      = 
+$wp_obj       = wp-x86_64.o
+$cmll_obj     = cmll-x86_64.o cmll_misc.o
+$modes_obj    = ghash-x86_64.o
+$engines_obj  = e_padlock-x86_64.o
+$perlasm_scheme = elf
+$dso_scheme   = dlfcn
+$shared_target= linux-shared
+$shared_cflag = -fPIC
+$shared_ldflag = -mx32
+$shared_extension = .so.$(SHLIB_MAJOR).$(SHLIB_MINOR)
+$ranlib       = 
+$arflags      = 
+$multilib     = x32
+
 *** linux-x86_64
 $cc           = gcc
 $cflags       = -m64 -DL_ENDIAN -DTERMIO -O3 -Wall

crypto/bn/asm/x86_64-gcc.c

@@ -55,7 +55,7 @@
  *    machine.
  */
 
-#ifdef _WIN64
+#if defined(_WIN64) || !defined(__LP64__)
 #define BN_ULONG unsigned long long
 #else
 #define BN_ULONG unsigned long
@@ -184,20 +184,22 @@ BN_ULONG bn_div_words(BN_ULONG h, BN_ULONG l, BN_ULONG d)
 }
 
 BN_ULONG bn_add_words (BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,int n)
-{ BN_ULONG ret=0,i=0;
+{ BN_ULONG ret;
+  size_t i=0;
 
 	if (n <= 0) return 0;
 
 	asm (
-	"	subq	%2,%2		\n"
+	"	subq	%0,%0		\n"	/* clear carry */
+	"	jmp	1f		\n"
 	".p2align 4			\n"
 	"1:	movq	(%4,%2,8),%0	\n"
 	"	adcq	(%5,%2,8),%0	\n"
 	"	movq	%0,(%3,%2,8)	\n"
-	"	leaq	1(%2),%2	\n"
+	"	lea	1(%2),%2	\n"
 	"	loop	1b		\n"
 	"	sbbq	%0,%0		\n"
-		: "=&a"(ret),"+c"(n),"=&r"(i)
+		: "=r"(ret),"+c"(n),"+r"(i)
 		: "r"(rp),"r"(ap),"r"(bp)
 		: "cc"
 	);
@@ -207,20 +209,22 @@ BN_ULONG bn_add_words (BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,int
 
 #ifndef SIMICS
 BN_ULONG bn_sub_words (BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,int n)
-{ BN_ULONG ret=0,i=0;
+{ BN_ULONG ret;
+  size_t i=0;
 
 	if (n <= 0) return 0;
 
 	asm (
-	"	subq	%2,%2		\n"
+	"	subq	%0,%0		\n"	/* clear borrow */
+	"	jmp	1f		\n"
 	".p2align 4			\n"
 	"1:	movq	(%4,%2,8),%0	\n"
 	"	sbbq	(%5,%2,8),%0	\n"
 	"	movq	%0,(%3,%2,8)	\n"
-	"	leaq	1(%2),%2	\n"
+	"	lea	1(%2),%2	\n"
 	"	loop	1b		\n"
 	"	sbbq	%0,%0		\n"
-		: "=&a"(ret),"+c"(n),"=&r"(i)
+		: "=r"(ret),"+c"(n),"+r"(i)
 		: "r"(rp),"r"(ap),"r"(bp)
 		: "cc"
 	);