From a5430f73e173766f7c2973930e9efc8d8c9cb580 Mon Sep 17 00:00:00 2001
From: pooler <pooler@litecoinpool.org>
Date: Fri, 16 May 2014 15:37:41 +0200
Subject: [PATCH] Add a configure option to disable assembly code

---
 Makefile.am  | 2 ++
 configure.ac | 9 ++++++++-
 cpu-miner.c  | 8 ++++----
 miner.h      | 3 ++-
 scrypt-arm.S | 2 +-
 scrypt-x64.S | 2 +-
 scrypt-x86.S | 2 +-
 scrypt.c     | 6 +++---
 sha2-arm.S   | 2 +-
 sha2-x64.S   | 2 +-
 sha2-x86.S   | 2 +-
 sha2.c       | 2 +-
 12 files changed, 26 insertions(+), 16 deletions(-)

diff --git a/Makefile.am b/Makefile.am
index 9a48b97..ca8f9e5 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -18,6 +18,7 @@ dist_man_MANS	= minerd.1
 minerd_SOURCES	= elist.h miner.h compat.h \
 		  cpu-miner.c util.c \
 		  sha2.c scrypt.c
+if USE_ASM
 if ARCH_x86
 minerd_SOURCES += sha2-x86.S scrypt-x86.S
 endif
@@ -27,6 +28,7 @@ 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@
diff --git a/configure.ac b/configure.ac
index 719ec8e..218e794 100644
--- a/configure.ac
+++ b/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");])],
@@ -98,6 +104,7 @@ AC_CHECK_LIB([pthread], [pthread_create], PTHREAD_LIBS="-lpthread",
 
 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])
diff --git a/cpu-miner.c b/cpu-miner.c
index da50fbd..1823571 100644
--- a/cpu-miner.c
+++ b/cpu-miner.c
@@ -1395,13 +1395,13 @@ out:
 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)
@@ -1413,7 +1413,7 @@ 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__) || \
diff --git a/miner.h b/miner.h
index 765512e..2ed3653 100644
--- a/miner.h
+++ b/miner.h
@@ -136,19 +136,20 @@ 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);
diff --git a/scrypt-arm.S b/scrypt-arm.S
index 5e2e29c..983202a 100644
--- a/scrypt-arm.S
+++ b/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__) || \
diff --git a/scrypt-x64.S b/scrypt-x64.S
index c95fa45..b9f3358 100644
--- a/scrypt-x64.S
+++ b/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
diff --git a/scrypt-x86.S b/scrypt-x86.S
index 4fb2c46..7e12ceb 100644
--- a/scrypt-x86.S
+++ b/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
diff --git a/scrypt.c b/scrypt.c
index f113c79..702551b 100644
--- a/scrypt.c
+++ b/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);
 void scrypt_core_6way(uint32_t *X, uint32_t *V);
 #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);
 
-#elif defined(__arm__) && defined(__APCS_32__)
+#elif defined(USE_ASM) && defined(__arm__) && defined(__APCS_32__)
 
 void scrypt_core(uint32_t *X, uint32_t *V);
 #if defined(__ARM_NEON__)
diff --git a/sha2-arm.S b/sha2-arm.S
index 7ea307c..bd7fdc5 100644
--- a/sha2-arm.S
+++ b/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
diff --git a/sha2-x64.S b/sha2-x64.S
index 909e2fa..0326d9d 100644
--- a/sha2-x64.S
+++ b/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
diff --git a/sha2-x86.S b/sha2-x86.S
index 89bf4a9..e2eb112 100644
--- a/sha2-x86.S
+++ b/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
diff --git a/sha2.c b/sha2.c
index d13a495..367efda 100644
--- a/sha2.c
+++ b/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