Add a configure option to disable assembly code

Backport from cpuminer 2.4

Require ./autogen.sh to enable this new (default) option

Signed-off-by: Tanguy Pruvot <tanguy.pruvot@gmail.com>

Makefile.am

@@ -50,6 +50,7 @@ minerd_SOURCES	= elist.h \
 		  crypto/c_skein.c \
 		  crypto/hash.c \
 		  crypto/aesb.c
+if USE_ASM
 if ARCH_x86
 minerd_SOURCES += sha2-x86.S scrypt-x86.S aesb-x86.S crypto/aesb-x86-impl.c
 endif
@@ -59,11 +60,13 @@ endif
 if ARCH_ARM
 minerd_SOURCES += sha2-arm.S scrypt-arm.S
 endif
+endif
+
 minerd_LDFLAGS	= $(PTHREAD_FLAGS)
 minerd_LDADD	= @LIBCURL@ @JANSSON_LIBS@ @PTHREAD_LIBS@ @WS2_LIBS@
 minerd_CPPFLAGS = @LIBCURL_CPPFLAGS@
 minerd_CFLAGS   = -Ofast -flto -fuse-linker-plugin
 
 if HAVE_WINDOWS
 minerd_CFLAGS += -Wl,--stack,10485760
-endif
+endif

configure.ac

@@ -61,7 +61,13 @@ case $target in
     ;;
 esac
 
-if test x$have_x86 = xtrue -o x$have_x86_64 = xtrue
+AC_ARG_ENABLE([assembly],
+  AS_HELP_STRING([--disable-assembly], [disable assembly-language routines]))
+if test x$enable_assembly != xno; then
+  AC_DEFINE([USE_ASM], [1], [Define to 1 if assembly routines are wanted.])
+fi
+
+if test x$enable_assembly != xno -a x$have_x86_64 = xtrue
 then
   AC_MSG_CHECKING(whether we can compile AVX code)
   AC_COMPILE_IFELSE([AC_LANG_PROGRAM(,[asm ("vmovdqa %ymm0, %ymm1");])],
@@ -108,6 +114,7 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([static __uint128_t i = 100;])],
 
 AM_CONDITIONAL([WANT_JANSSON], [test x$request_jansson = xtrue])
 AM_CONDITIONAL([HAVE_WINDOWS], [test x$have_win32 = xtrue])
+AM_CONDITIONAL([USE_ASM], [test x$enable_assembly != xno])
 AM_CONDITIONAL([ARCH_x86], [test x$have_x86 = xtrue])
 AM_CONDITIONAL([ARCH_x86_64], [test x$have_x86_64 = xtrue])
 AM_CONDITIONAL([ARCH_ARM], [test x$have_arm = xtrue])

cpu-miner.c

@@ -1466,13 +1466,13 @@ static void *stratum_thread(void *userdata) {
 
 static void show_version_and_exit(void) {
     printf(PACKAGE_STRING "\n built on " __DATE__ "\n features:"
-#if defined(__i386__)
+#if defined(USE_ASM) && defined(__i386__)
             " i386"
 #endif
-#if defined(__x86_64__)
+#if defined(USE_ASM) && defined(__x86_64__)
             " x86_64"
 #endif
-#if defined(__i386__) || defined(__x86_64__)
+#if defined(USE_ASM) && defined(__i386__) || defined(__x86_64__)
             " SSE2"
 #endif
 #if defined(__x86_64__) && defined(USE_AVX)
@@ -1484,7 +1484,7 @@ static void show_version_and_exit(void) {
 #if defined(__x86_64__) && defined(USE_XOP)
             " XOP"
 #endif
-#if defined(__arm__) && defined(__APCS_32__)
+#if defined(USE_ASM) && defined(__arm__) && defined(__APCS_32__)
             " ARM"
 #if defined(__ARM_ARCH_5E__) || defined(__ARM_ARCH_5TE__) || \
 	defined(__ARM_ARCH_5TEJ__) || defined(__ARM_ARCH_6__) || \

miner.h

@@ -134,19 +134,20 @@ void sha256_init(uint32_t *state);
 void sha256_transform(uint32_t *state, const uint32_t *block, int swap);
 void sha256d(unsigned char *hash, const unsigned char *data, int len);
 
+#ifdef USE_ASM
 #if defined(__ARM_NEON__) || defined(__i386__) || defined(__x86_64__)
 #define HAVE_SHA256_4WAY 1
 int sha256_use_4way();
 void sha256_init_4way(uint32_t *state);
 void sha256_transform_4way(uint32_t *state, const uint32_t *block, int swap);
 #endif
-
 #if defined(__x86_64__) && defined(USE_AVX2)
 #define HAVE_SHA256_8WAY 1
 int sha256_use_8way();
 void sha256_init_8way(uint32_t *state);
 void sha256_transform_8way(uint32_t *state, const uint32_t *block, int swap);
 #endif
+#endif
 
 extern int scanhash_sha256d(int thr_id, uint32_t *pdata,
 	const uint32_t *ptarget, uint32_t max_nonce, unsigned long *hashes_done);

scrypt-arm.S

@@ -9,7 +9,7 @@
 
 #include "cpuminer-config.h"
 
-#if defined(__arm__) && defined(__APCS_32__)
+#if defined(USE_ASM) && defined(__arm__) && defined(__APCS_32__)
 
 #if defined(__ARM_ARCH_5E__) || defined(__ARM_ARCH_5TE__) || \
 	defined(__ARM_ARCH_5TEJ__) || defined(__ARM_ARCH_6__) || \

scrypt-x64.S

@@ -30,7 +30,7 @@
 	.section .note.GNU-stack,"",%progbits
 #endif
 
-#if defined(__x86_64__)
+#if defined(USE_ASM) && defined(__x86_64__)
 
 	.text
 	.p2align 6

scrypt-x86.S

@@ -30,7 +30,7 @@
 	.section .note.GNU-stack,"",%progbits
 #endif
 
-#if defined(__i386__)
+#if defined(USE_ASM) && defined(__i386__)
 
 .macro scrypt_shuffle src, so, dest, do
 	movl	\so+60(\src), %eax

scrypt.c

@@ -378,7 +378,7 @@ static inline void PBKDF2_SHA256_128_32_8way(uint32_t *tstate,
 #endif /* HAVE_SHA256_8WAY */
 
 
-#if defined(__x86_64__)
+#if defined(USE_ASM) && defined(__x86_64__)
 
 #define SCRYPT_MAX_WAYS 12
 #define HAVE_SCRYPT_3WAY 1
@@ -392,13 +392,13 @@ void scrypt_core_3way(uint32_t *X, uint32_t *V, int N);
 void scrypt_core_6way(uint32_t *X, uint32_t *V, int N);
 #endif
 
-#elif defined(__i386__)
+#elif defined(USE_ASM) && defined(__i386__)
 
 #define SCRYPT_MAX_WAYS 4
 #define scrypt_best_throughput() 1
 void scrypt_core(uint32_t *X, uint32_t *V, int N);
 
-#elif defined(__arm__) && defined(__APCS_32__)
+#elif defined(USE_ASM) && defined(__arm__) && defined(__APCS_32__)
 
 void scrypt_core(uint32_t *X, uint32_t *V, int N);
 #if defined(__ARM_NEON__)

sha2-arm.S

@@ -9,7 +9,7 @@
 
 #include "cpuminer-config.h"
 
-#if defined(__arm__) && defined(__APCS_32__)
+#if defined(USE_ASM) && defined(__arm__) && defined(__APCS_32__)
 
 .macro sha256_k
 	.align 2

sha2-x64.S

@@ -13,7 +13,7 @@
 	.section .note.GNU-stack,"",%progbits
 #endif
 
-#if defined(__x86_64__)
+#if defined(USE_ASM) && defined(__x86_64__)
 
 	.data
 	.p2align 7

sha2-x86.S

@@ -13,7 +13,7 @@
 	.section .note.GNU-stack,"",%progbits
 #endif
 
-#if defined(__i386__)
+#if defined(USE_ASM) && defined(__i386__)
 
 	.data
 	.p2align 7

sha2.c

@@ -14,7 +14,7 @@
 #include <string.h>
 #include <inttypes.h>
 
-#if defined(__arm__) && defined(__APCS_32__)
+#if defined(USE_ASM) && defined(__arm__) && defined(__APCS_32__)
 #define EXTERN_SHA256
 #endif