summaryrefslogtreecommitdiff
path: root/dxr3memcpy.c
diff options
context:
space:
mode:
Diffstat (limited to 'dxr3memcpy.c')
-rw-r--r--dxr3memcpy.c522
1 files changed, 261 insertions, 261 deletions
diff --git a/dxr3memcpy.c b/dxr3memcpy.c
index 374cc32..0033a1a 100644
--- a/dxr3memcpy.c
+++ b/dxr3memcpy.c
@@ -52,37 +52,37 @@ void *(* dxr3_memcpy)(void *to, const void *from, size_t len);
{\
register unsigned long int dummy;\
__asm__ __volatile__(\
- "rep; movsb"\
- :"=&D"(to), "=&S"(from), "=&c"(dummy)\
- :"0" (to), "1" (from),"2" (n)\
- : "memory");\
+"rep; movsb"\
+:"=&D"(to), "=&S"(from), "=&c"(dummy)\
+:"0" (to), "1" (from),"2" (n)\
+: "memory");\
}
*/
// ==================================
//! linux kernel __memcpy (from: /include/asm/string.h)
static __inline__ void * __memcpy (
- void * to,
- const void * from,
- size_t n)
+ void * to,
+ const void * from,
+ size_t n)
{
-int d0, d1, d2;
+ int d0, d1, d2;
if( n < 4 ) {
small_memcpy(to,from,n);
}
else
__asm__ __volatile__(
- "rep ; movsl\n\t"
- "testb $2,%b4\n\t"
- "je 1f\n\t"
- "movsw\n"
- "1:\ttestb $1,%b4\n\t"
- "je 2f\n\t"
- "movsb\n"
- "2:"
- : "=&c" (d0), "=&D" (d1), "=&S" (d2)
- :"0" (n/4), "q" (n),"1" ((long) to),"2" ((long) from)
- : "memory");
+ "rep ; movsl\n\t"
+ "testb $2,%b4\n\t"
+ "je 1f\n\t"
+ "movsw\n"
+ "1:\ttestb $1,%b4\n\t"
+ "je 2f\n\t"
+ "movsb\n"
+ "2:"
+ : "=&c" (d0), "=&D" (d1), "=&S" (d2)
+ :"0" (n/4), "q" (n),"1" ((long) to),"2" ((long) from)
+ : "memory");
return (to);
}
@@ -96,8 +96,8 @@ int d0, d1, d2;
// ==================================
/* SSE note: i tried to move 128 bytes a time instead of 64 but it
-didn't make any measureable difference. i'm using 64 for the sake of
-simplicity. [MF] */
+ didn't make any measureable difference. i'm using 64 for the sake of
+ simplicity. [MF] */
static void * sse_memcpy(void * to, const void * from, size_t len)
{
void *retval;
@@ -106,79 +106,79 @@ static void * sse_memcpy(void * to, const void * from, size_t len)
/* PREFETCH has effect even for MOVSB instruction ;) */
__asm__ __volatile__ (
- " prefetchnta (%0)\n"
- " prefetchnta 32(%0)\n"
- " prefetchnta 64(%0)\n"
- " prefetchnta 96(%0)\n"
- " prefetchnta 128(%0)\n"
- " prefetchnta 160(%0)\n"
- " prefetchnta 192(%0)\n"
- " prefetchnta 224(%0)\n"
- " prefetchnta 256(%0)\n"
- " prefetchnta 288(%0)\n"
- : : "r" (from) );
+ " prefetchnta (%0)\n"
+ " prefetchnta 32(%0)\n"
+ " prefetchnta 64(%0)\n"
+ " prefetchnta 96(%0)\n"
+ " prefetchnta 128(%0)\n"
+ " prefetchnta 160(%0)\n"
+ " prefetchnta 192(%0)\n"
+ " prefetchnta 224(%0)\n"
+ " prefetchnta 256(%0)\n"
+ " prefetchnta 288(%0)\n"
+ : : "r" (from) );
if(len >= MIN_LEN)
- {
- register unsigned long int delta;
- /* Align destinition to MMREG_SIZE -boundary */
- delta = ((unsigned long int)to)&(SSE_MMREG_SIZE-1);
- if(delta)
{
- delta=SSE_MMREG_SIZE-delta;
- len -= delta;
- small_memcpy(to, from, delta);
+ register unsigned long int delta;
+ /* Align destinition to MMREG_SIZE -boundary */
+ delta = ((unsigned long int)to)&(SSE_MMREG_SIZE-1);
+ if(delta)
+ {
+ delta=SSE_MMREG_SIZE-delta;
+ len -= delta;
+ small_memcpy(to, from, delta);
+ }
+ i = len >> 6; /* len/64 */
+ len&=63;
+ if(((unsigned long)from) & 15)
+ /* if SRC is misaligned */
+ for(; i>0; i--)
+ {
+ __asm__ __volatile__ (
+ "prefetchnta 320(%0)\n"
+ "prefetchnta 352(%0)\n"
+ "movups (%0), %%xmm0\n"
+ "movups 16(%0), %%xmm1\n"
+ "movups 32(%0), %%xmm2\n"
+ "movups 48(%0), %%xmm3\n"
+ "movntps %%xmm0, (%1)\n"
+ "movntps %%xmm1, 16(%1)\n"
+ "movntps %%xmm2, 32(%1)\n"
+ "movntps %%xmm3, 48(%1)\n"
+ : : "r" (from), "r" (to) : "memory");
+ from = ((const unsigned char *)from) + 64;
+ to = ((unsigned char *)to) + 64;
+ }
+ else
+ /*
+ Only if SRC is aligned on 16-byte boundary.
+ It allows to use movaps instead of movups, which required data
+ to be aligned or a general-protection exception (#GP) is generated.
+ */
+ for(; i>0; i--)
+ {
+ __asm__ __volatile__ (
+ "prefetchnta 320(%0)\n"
+ "prefetchnta 352(%0)\n"
+ "movaps (%0), %%xmm0\n"
+ "movaps 16(%0), %%xmm1\n"
+ "movaps 32(%0), %%xmm2\n"
+ "movaps 48(%0), %%xmm3\n"
+ "movntps %%xmm0, (%1)\n"
+ "movntps %%xmm1, 16(%1)\n"
+ "movntps %%xmm2, 32(%1)\n"
+ "movntps %%xmm3, 48(%1)\n"
+ : : "r" (from), "r" (to) : "memory");
+ from = ((const unsigned char *)from) + 64;
+ to = ((unsigned char *)to) + 64;
+ }
+ /* since movntq is weakly-ordered, a "sfence"
+ * is needed to become ordered again. */
+ __asm__ __volatile__ ("sfence": : :"memory");
+ /* enables to use FPU */
+ __asm__ __volatile__ ("emms": : :"memory");
}
- i = len >> 6; /* len/64 */
- len&=63;
- if(((unsigned long)from) & 15)
- /* if SRC is misaligned */
- for(; i>0; i--)
- {
- __asm__ __volatile__ (
- "prefetchnta 320(%0)\n"
- "prefetchnta 352(%0)\n"
- "movups (%0), %%xmm0\n"
- "movups 16(%0), %%xmm1\n"
- "movups 32(%0), %%xmm2\n"
- "movups 48(%0), %%xmm3\n"
- "movntps %%xmm0, (%1)\n"
- "movntps %%xmm1, 16(%1)\n"
- "movntps %%xmm2, 32(%1)\n"
- "movntps %%xmm3, 48(%1)\n"
- : : "r" (from), "r" (to) : "memory");
- from = ((const unsigned char *)from) + 64;
- to = ((unsigned char *)to) + 64;
- }
- else
- /*
- Only if SRC is aligned on 16-byte boundary.
- It allows to use movaps instead of movups, which required data
- to be aligned or a general-protection exception (#GP) is generated.
- */
- for(; i>0; i--)
- {
- __asm__ __volatile__ (
- "prefetchnta 320(%0)\n"
- "prefetchnta 352(%0)\n"
- "movaps (%0), %%xmm0\n"
- "movaps 16(%0), %%xmm1\n"
- "movaps 32(%0), %%xmm2\n"
- "movaps 48(%0), %%xmm3\n"
- "movntps %%xmm0, (%1)\n"
- "movntps %%xmm1, 16(%1)\n"
- "movntps %%xmm2, 32(%1)\n"
- "movntps %%xmm3, 48(%1)\n"
- : : "r" (from), "r" (to) : "memory");
- from = ((const unsigned char *)from) + 64;
- to = ((unsigned char *)to) + 64;
- }
- /* since movntq is weakly-ordered, a "sfence"
- * is needed to become ordered again. */
- __asm__ __volatile__ ("sfence": : :"memory");
- /* enables to use FPU */
- __asm__ __volatile__ ("emms": : :"memory");
- }
/*
* Now do the tail of the block
*/
@@ -194,43 +194,43 @@ static void * mmx_memcpy(void * to, const void * from, size_t len)
retval = to;
if(len >= MMX1_MIN_LEN)
- {
- register unsigned long int delta;
- /* Align destinition to MMREG_SIZE -boundary */
- delta = ((unsigned long int)to)&(MMX_MMREG_SIZE-1);
- if(delta)
{
- delta=MMX_MMREG_SIZE-delta;
- len -= delta;
- small_memcpy(to, from, delta);
- }
- i = len >> 6; /* len/64 */
- len&=63;
- for(; i>0; i--)
- {
- __asm__ __volatile__ (
- "movq (%0), %%mm0\n"
- "movq 8(%0), %%mm1\n"
- "movq 16(%0), %%mm2\n"
- "movq 24(%0), %%mm3\n"
- "movq 32(%0), %%mm4\n"
- "movq 40(%0), %%mm5\n"
- "movq 48(%0), %%mm6\n"
- "movq 56(%0), %%mm7\n"
- "movq %%mm0, (%1)\n"
- "movq %%mm1, 8(%1)\n"
- "movq %%mm2, 16(%1)\n"
- "movq %%mm3, 24(%1)\n"
- "movq %%mm4, 32(%1)\n"
- "movq %%mm5, 40(%1)\n"
- "movq %%mm6, 48(%1)\n"
- "movq %%mm7, 56(%1)\n"
- : : "r" (from), "r" (to) : "memory");
- from = ((const unsigned char *)from) + 64;
- to = ((unsigned char *)to) + 64;
+ register unsigned long int delta;
+ /* Align destinition to MMREG_SIZE -boundary */
+ delta = ((unsigned long int)to)&(MMX_MMREG_SIZE-1);
+ if(delta)
+ {
+ delta=MMX_MMREG_SIZE-delta;
+ len -= delta;
+ small_memcpy(to, from, delta);
+ }
+ i = len >> 6; /* len/64 */
+ len&=63;
+ for(; i>0; i--)
+ {
+ __asm__ __volatile__ (
+ "movq (%0), %%mm0\n"
+ "movq 8(%0), %%mm1\n"
+ "movq 16(%0), %%mm2\n"
+ "movq 24(%0), %%mm3\n"
+ "movq 32(%0), %%mm4\n"
+ "movq 40(%0), %%mm5\n"
+ "movq 48(%0), %%mm6\n"
+ "movq 56(%0), %%mm7\n"
+ "movq %%mm0, (%1)\n"
+ "movq %%mm1, 8(%1)\n"
+ "movq %%mm2, 16(%1)\n"
+ "movq %%mm3, 24(%1)\n"
+ "movq %%mm4, 32(%1)\n"
+ "movq %%mm5, 40(%1)\n"
+ "movq %%mm6, 48(%1)\n"
+ "movq %%mm7, 56(%1)\n"
+ : : "r" (from), "r" (to) : "memory");
+ from = ((const unsigned char *)from) + 64;
+ to = ((unsigned char *)to) + 64;
+ }
+ __asm__ __volatile__ ("emms": : :"memory");
}
- __asm__ __volatile__ ("emms": : :"memory");
- }
/*
* Now do the tail of the block
*/
@@ -247,61 +247,61 @@ static void * mmx2_memcpy(void * to, const void * from, size_t len)
/* PREFETCH has effect even for MOVSB instruction ;) */
__asm__ __volatile__ (
- " prefetchnta (%0)\n"
- " prefetchnta 32(%0)\n"
- " prefetchnta 64(%0)\n"
- " prefetchnta 96(%0)\n"
- " prefetchnta 128(%0)\n"
- " prefetchnta 160(%0)\n"
- " prefetchnta 192(%0)\n"
- " prefetchnta 224(%0)\n"
- " prefetchnta 256(%0)\n"
- " prefetchnta 288(%0)\n"
- : : "r" (from) );
+ " prefetchnta (%0)\n"
+ " prefetchnta 32(%0)\n"
+ " prefetchnta 64(%0)\n"
+ " prefetchnta 96(%0)\n"
+ " prefetchnta 128(%0)\n"
+ " prefetchnta 160(%0)\n"
+ " prefetchnta 192(%0)\n"
+ " prefetchnta 224(%0)\n"
+ " prefetchnta 256(%0)\n"
+ " prefetchnta 288(%0)\n"
+ : : "r" (from) );
if(len >= MIN_LEN)
- {
- register unsigned long int delta;
- /* Align destinition to MMREG_SIZE -boundary */
- delta = ((unsigned long int)to)&(MMX_MMREG_SIZE-1);
- if(delta)
- {
- delta=MMX_MMREG_SIZE-delta;
- len -= delta;
- small_memcpy(to, from, delta);
- }
- i = len >> 6; /* len/64 */
- len&=63;
- for(; i>0; i--)
{
- __asm__ __volatile__ (
- "prefetchnta 320(%0)\n"
- "prefetchnta 352(%0)\n"
- "movq (%0), %%mm0\n"
- "movq 8(%0), %%mm1\n"
- "movq 16(%0), %%mm2\n"
- "movq 24(%0), %%mm3\n"
- "movq 32(%0), %%mm4\n"
- "movq 40(%0), %%mm5\n"
- "movq 48(%0), %%mm6\n"
- "movq 56(%0), %%mm7\n"
- "movntq %%mm0, (%1)\n"
- "movntq %%mm1, 8(%1)\n"
- "movntq %%mm2, 16(%1)\n"
- "movntq %%mm3, 24(%1)\n"
- "movntq %%mm4, 32(%1)\n"
- "movntq %%mm5, 40(%1)\n"
- "movntq %%mm6, 48(%1)\n"
- "movntq %%mm7, 56(%1)\n"
- : : "r" (from), "r" (to) : "memory");
- from = ((const unsigned char *)from) + 64;
- to = ((unsigned char *)to) + 64;
+ register unsigned long int delta;
+ /* Align destinition to MMREG_SIZE -boundary */
+ delta = ((unsigned long int)to)&(MMX_MMREG_SIZE-1);
+ if(delta)
+ {
+ delta=MMX_MMREG_SIZE-delta;
+ len -= delta;
+ small_memcpy(to, from, delta);
+ }
+ i = len >> 6; /* len/64 */
+ len&=63;
+ for(; i>0; i--)
+ {
+ __asm__ __volatile__ (
+ "prefetchnta 320(%0)\n"
+ "prefetchnta 352(%0)\n"
+ "movq (%0), %%mm0\n"
+ "movq 8(%0), %%mm1\n"
+ "movq 16(%0), %%mm2\n"
+ "movq 24(%0), %%mm3\n"
+ "movq 32(%0), %%mm4\n"
+ "movq 40(%0), %%mm5\n"
+ "movq 48(%0), %%mm6\n"
+ "movq 56(%0), %%mm7\n"
+ "movntq %%mm0, (%1)\n"
+ "movntq %%mm1, 8(%1)\n"
+ "movntq %%mm2, 16(%1)\n"
+ "movntq %%mm3, 24(%1)\n"
+ "movntq %%mm4, 32(%1)\n"
+ "movntq %%mm5, 40(%1)\n"
+ "movntq %%mm6, 48(%1)\n"
+ "movntq %%mm7, 56(%1)\n"
+ : : "r" (from), "r" (to) : "memory");
+ from = ((const unsigned char *)from) + 64;
+ to = ((unsigned char *)to) + 64;
+ }
+ /* since movntq is weakly-ordered, a "sfence"
+ * is needed to become ordered again. */
+ __asm__ __volatile__ ("sfence": : :"memory");
+ __asm__ __volatile__ ("emms": : :"memory");
}
- /* since movntq is weakly-ordered, a "sfence"
- * is needed to become ordered again. */
- __asm__ __volatile__ ("sfence": : :"memory");
- __asm__ __volatile__ ("emms": : :"memory");
- }
/*
* Now do the tail of the block
*/
@@ -320,104 +320,104 @@ static void *linux_kernel_memcpy(void *to, const void *from, size_t len) {
//! constr.
cDxr3MemcpyBench::cDxr3MemcpyBench(uint32_t config_flags)
{
- //
- // add all aviable memcpy routines
- //
+ //
+ // add all aviable memcpy routines
+ //
- memcpy_routine routine;
+ memcpy_routine routine;
- // glibc memcpy
- routine.name = "glibc memcpy()";
- routine.function = memcpy;
- routine.time = 0;
- routine.cpu_require = 0;
- m_methods.push_back(routine);
+ // glibc memcpy
+ routine.name = "glibc memcpy()";
+ routine.function = memcpy;
+ routine.time = 0;
+ routine.cpu_require = 0;
+ m_methods.push_back(routine);
#if defined(__i386__) || defined(__x86_64__)
- // linux_kernel_memcpy
- routine.name = "linux_kernel_memcpy()";
- routine.function = linux_kernel_memcpy;
- routine.cpu_require = 0;
- m_methods.push_back(routine);
+ // linux_kernel_memcpy
+ routine.name = "linux_kernel_memcpy()";
+ routine.function = linux_kernel_memcpy;
+ routine.cpu_require = 0;
+ m_methods.push_back(routine);
- // MMX optimized memcpy()
- routine.name = "MMX optimized memcpy()";
- routine.function = mmx_memcpy;
- routine.cpu_require = CC_MMX;
- m_methods.push_back(routine);
+ // MMX optimized memcpy()
+ routine.name = "MMX optimized memcpy()";
+ routine.function = mmx_memcpy;
+ routine.cpu_require = CC_MMX;
+ m_methods.push_back(routine);
- // MMXEXT optimized memcpy()
- routine.name = "MMXEXT optimized memcpy()";
- routine.function = mmx2_memcpy;
- routine.cpu_require = CC_MMXEXT;
- m_methods.push_back(routine);
+ // MMXEXT optimized memcpy()
+ routine.name = "MMXEXT optimized memcpy()";
+ routine.function = mmx2_memcpy;
+ routine.cpu_require = CC_MMXEXT;
+ m_methods.push_back(routine);
#ifndef __FreeBSD__
- // SSE optimized memcpy()
- routine.name = "SSE optimized memcpy()";
- routine.function = sse_memcpy;
- routine.cpu_require = CC_MMXEXT|CC_SSE;
- m_methods.push_back(routine);
+ // SSE optimized memcpy()
+ routine.name = "SSE optimized memcpy()";
+ routine.function = sse_memcpy;
+ routine.cpu_require = CC_MMXEXT|CC_SSE;
+ m_methods.push_back(routine);
#endif /* not __FreeBSD__ */
#endif /* __i386__ || __x86_64__ */
- //
- // run benchmarking
- //
+ //
+ // run benchmarking
+ //
- unsigned long long t = 0;
- void *buf1, *buf2;
- int j, best = -1;
+ unsigned long long t = 0;
+ void *buf1, *buf2;
+ int j, best = -1;
- if ((buf1 = malloc(BUFSIZE)) == NULL)
- return;
+ if ((buf1 = malloc(BUFSIZE)) == NULL)
+ return;
- if ((buf2 = malloc(BUFSIZE)) == NULL)
+ if ((buf2 = malloc(BUFSIZE)) == NULL)
+ {
+ free(buf1);
+ return;
+ }
+
+ cLog::Instance() << "\nBenchmarking memcpy() methods (smaller is better):\n";
+ // make sure buffers are present on physical memory
+ memcpy(buf1,buf2,BUFSIZE);
+
+ for (size_t i = 0; i < m_methods.size(); i++)
+ {
+ if ((config_flags & m_methods[i].cpu_require) != m_methods[i].cpu_require)
{
- free(buf1);
- return;
+ continue;
}
- cLog::Instance() << "\nBenchmarking memcpy() methods (smaller is better):\n";
- // make sure buffers are present on physical memory
- memcpy(buf1,buf2,BUFSIZE);
+ // count 100 runs of the memcpy function
+ t = Rdtsc(config_flags);
+ for (j = 0; j < 50; j++)
+ {
+ m_methods[i].function(buf2,buf1,BUFSIZE);
+ m_methods[i].function(buf1,buf2,BUFSIZE);
+ }
+ t = Rdtsc(config_flags) - t;
+
+ m_methods[i].time = t;
- for (size_t i = 0; i < m_methods.size(); i++)
+ cLog::Instance() << m_methods[i].name.c_str() << ": " << (unsigned long long)t << "\n";
+
+ if (best == -1 || t < m_methods[best].time)
{
- if ((config_flags & m_methods[i].cpu_require) != m_methods[i].cpu_require)
- {
- continue;
- }
-
- // count 100 runs of the memcpy function
- t = Rdtsc(config_flags);
- for (j = 0; j < 50; j++)
- {
- m_methods[i].function(buf2,buf1,BUFSIZE);
- m_methods[i].function(buf1,buf2,BUFSIZE);
- }
- t = Rdtsc(config_flags) - t;
-
- m_methods[i].time = t;
-
- cLog::Instance() << m_methods[i].name.c_str() << ": " << (unsigned long long)t << "\n";
-
- if (best == -1 || t < m_methods[best].time)
- {
- best = i;
- }
+ best = i;
}
- cLog::Instance() << "\nBest one: " << m_methods[best].name.c_str() << "\n\n";
+ }
+ cLog::Instance() << "\nBest one: " << m_methods[best].name.c_str() << "\n\n";
- dxr3_memcpy = m_methods[best].function;
+ dxr3_memcpy = m_methods[best].function;
- // clear unused memory
- free(buf1);
- free(buf2);
+ // clear unused memory
+ free(buf1);
+ free(buf2);
}
// ==================================
@@ -425,19 +425,19 @@ cDxr3MemcpyBench::cDxr3MemcpyBench(uint32_t config_flags)
unsigned long long int cDxr3MemcpyBench::Rdtsc(uint32_t config_flags)
{
#if defined(__i386__) || defined(__x86_64__)
- // we need rdtsc support
- if (config_flags && CC_MMX)
- {
- unsigned long long int x;
- __asm__ volatile (".byte 0x0f, 0x31" : "=A" (x));
- return x;
- }
- else
- {
- return times(NULL);
- }
+ // we need rdtsc support
+ if (config_flags && CC_MMX)
+ {
+ unsigned long long int x;
+ __asm__ volatile (".byte 0x0f, 0x31" : "=A" (x));
+ return x;
+ }
+ else
+ {
+ return times(NULL);
+ }
#else
- struct tms tp;
- return times(&tp);
+ struct tms tp;
+ return times(&tp);
#endif /* __i386__ || __x86_64__ */
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-02-24 10:43:13 +0000