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ARM NEON Salsa20/12 in build and selftest. Almost 2X speedup on a Raspberry Pi.

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This commit is contained in:
Adam Ierymenko 2017-04-19 23:49:26 +00:00
parent 8e1ac9fb0c
commit a376bcc654
3 changed files with 42 additions and 2 deletions
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8
ext/arm32-neon-salsa2012-asm/salsa2012.h
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@ -1,6 +1,14 @@
#ifndef ZT_SALSA2012_ARM32NEON_ASM
#define ZT_SALSA2012_ARM32NEON_ASM
#if defined(__linux__) || defined(linux) || defined(__LINUX__) || defined(__linux)
#include <sys/auxv.h>
#include <asm/hwcap.h>
#define zt_arm_has_neon() (getauxval(AT_HWCAP) & HWCAP_NEON)
#else
#define zt_arm_has_neon() (true)
#endif
#ifdef __cplusplus
extern "C" {
#endif

13
make-linux.mk
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@ -98,30 +98,37 @@ endif
ifeq ($(CC_MACH),arm)
ZT_ARCHITECTURE=3
override DEFS+=-DZT_NO_TYPE_PUNNING
ZT_USE_ARM32_NEON_ASM_SALSA2012=1
endif
ifeq ($(CC_MACH),armel)
ZT_ARCHITECTURE=3
override DEFS+=-DZT_NO_TYPE_PUNNING
ZT_USE_ARM32_NEON_ASM_SALSA2012=1
endif
ifeq ($(CC_MACH),armhf)
ZT_ARCHITECTURE=3
override DEFS+=-DZT_NO_TYPE_PUNNING
ZT_USE_ARM32_NEON_ASM_SALSA2012=1
endif
ifeq ($(CC_MACH),armv6)
ZT_ARCHITECTURE=3
override DEFS+=-DZT_NO_TYPE_PUNNING
ZT_USE_ARM32_NEON_ASM_SALSA2012=1
endif
ifeq ($(CC_MACH),armv6zk)
ZT_ARCHITECTURE=3
override DEFS+=-DZT_NO_TYPE_PUNNING
ZT_USE_ARM32_NEON_ASM_SALSA2012=1
endif
ifeq ($(CC_MACH),armv6kz)
ZT_ARCHITECTURE=3
override DEFS+=-DZT_NO_TYPE_PUNNING
ZT_USE_ARM32_NEON_ASM_SALSA2012=1
endif
ifeq ($(CC_MACH),armv7)
ZT_ARCHITECTURE=3
override DEFS+=-DZT_NO_TYPE_PUNNING
ZT_USE_ARM32_NEON_ASM_SALSA2012=1
endif
ifeq ($(CC_MACH),arm64)
ZT_ARCHITECTURE=4
@ -158,11 +165,15 @@ endif
# Disable software updates by default on Linux since that is normally done with package management
override DEFS+=-DZT_BUILD_PLATFORM=1 -DZT_BUILD_ARCHITECTURE=$(ZT_ARCHITECTURE) -DZT_SOFTWARE_UPDATE_DEFAULT="\"disable\""
# Use X64 ASM Salsa20/12 on X86_64 target
# Build faster crypto on some targets
ifeq ($(ZT_USE_X64_ASM_SALSA2012),1)
override DEFS+=-DZT_USE_X64_ASM_SALSA2012
override OBJS+=ext/x64-salsa2012-asm/salsa2012.o
endif
ifeq ($(ZT_USE_ARM32_NEON_ASM_SALSA2012),1)
override DEFS+=-DZT_USE_ARM32_NEON_ASM_SALSA2012
override OBJS+=ext/arm32-neon-salsa2012-asm/salsa2012.o
endif
# Static builds, which are currently done for a number of Linux targets
ifeq ($(ZT_STATIC),1)

23
selftest.cpp
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@ -57,6 +57,9 @@
#ifdef ZT_USE_X64_ASM_SALSA2012
#include "ext/x64-salsa2012-asm/salsa2012.h"
#endif
#ifdef ZT_USE_ARM32_NEON_ASM_SALSA2012
#include "ext/arm32-neon-salsa2012-asm/salsa2012.h"
#endif
#ifdef __WINDOWS__
#include <tchar.h>
@ -215,7 +218,7 @@ static int testCrypto()
double bytes = 0.0;
uint64_t start = OSUtils::now();
for(unsigned int i=0;i<200;++i) {
zt_salsa2012_amd64_xmm6(bb, 1234567, s20TV0Iv, s20TV0Key);
zt_salsa2012_amd64_xmm6(bb,1234567,s20TV0Iv,s20TV0Key);
bytes += 1234567.0;
}
uint64_t end = OSUtils::now();
@ -224,6 +227,24 @@ static int testCrypto()
}
#endif
#ifdef ZT_USE_ARM32_NEON_ASM_SALSA2012
if (zt_arm_has_neon()) {
std::cout << "[crypto] Benchmarking Salsa20/12 fast arm32/neon ASM... "; std::cout.flush();
{
unsigned char *bb = (unsigned char *)::malloc(1234567);
double bytes = 0.0;
uint64_t start = OSUtils::now();
for(unsigned int i=0;i<200;++i) {
zt_salsa2012_armneon3_xor(bb,(const unsigned char *)0,1234567,s20TV0Iv,s20TV0Key);
bytes += 1234567.0;
}
uint64_t end = OSUtils::now();
std::cout << ((bytes / 1048576.0) / ((double)(end - start) / 1024.0)) << " MiB/second" << std::endl;
::free((void *)bb);
}
}
#endif
std::cout << "[crypto] Benchmarking Salsa20/20... "; std::cout.flush();
{
unsigned char *bb = (unsigned char *)::malloc(1234567);