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performance optimizations for sgemv_n

tags/v0.2.11^2
wernsaar 11 years ago
parent
3c5732615d
commit
c8a4a56177
2 changed files with 146 additions and 23 deletions
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  1. +25
    -7
      kernel/x86_64/sgemv_n_avx.c
  2. +121
    -16
      kernel/x86_64/sgemv_n_microk_bulldozer.c

+ 25
- 7
kernel/x86_64/sgemv_n_avx.c View File

@@ -70,12 +70,11 @@ int CNAME(BLASLONG m, BLASLONG n, BLASLONG dummy1, FLOAT alpha, FLOAT *a, BLASLO
n1 = n / 512 ;
n2 = n % 512 ;

m1 = m / 32;
m2 = m % 32;
m1 = m / 64;
m2 = m % 64;

x_ptr = x;
a_ptr = a;
y_ptr = y;
x_ptr = x;

for (j=0; j<n1; j++)
{
@@ -85,12 +84,19 @@ int CNAME(BLASLONG m, BLASLONG n, BLASLONG dummy1, FLOAT alpha, FLOAT *a, BLASLO
else
copy_x(512,x_ptr,xbuffer,inc_x);

x_ptr += 512 * inc_x;
a_ptr += j * 512;
a_ptr = a + j * 512 * lda;
y_ptr = y;


for(i = 0; i<m1; i++ )
{
sgemv_kernel_64(512,alpha,a_ptr,lda,xbuffer,ybuffer);
add_y(64,ybuffer,y_ptr,inc_y);
y_ptr += 64 * inc_y;
a_ptr += 64;

}

if ( m2 & 32 )
{
sgemv_kernel_32(512,alpha,a_ptr,lda,xbuffer,ybuffer);
add_y(32,ybuffer,y_ptr,inc_y);
@@ -98,6 +104,7 @@ int CNAME(BLASLONG m, BLASLONG n, BLASLONG dummy1, FLOAT alpha, FLOAT *a, BLASLO
a_ptr += 32;

}

if ( m2 & 16 )
{
sgemv_kernel_16(512,alpha,a_ptr,lda,xbuffer,ybuffer);
@@ -131,6 +138,7 @@ int CNAME(BLASLONG m, BLASLONG n, BLASLONG dummy1, FLOAT alpha, FLOAT *a, BLASLO
sgemv_kernel_1(512,alpha,a_ptr,lda,xbuffer,ybuffer);
add_y(1,ybuffer,y_ptr,inc_y);
}
x_ptr += 512 * inc_x;

}

@@ -142,9 +150,19 @@ int CNAME(BLASLONG m, BLASLONG n, BLASLONG dummy1, FLOAT alpha, FLOAT *a, BLASLO
else
copy_x(n2,x_ptr,xbuffer,inc_x);

a_ptr = a + n1 * 512 * lda;
y_ptr = y;

for(i = 0; i<m1; i++ )
{
sgemv_kernel_64(n2,alpha,a_ptr,lda,xbuffer,ybuffer);
add_y(64,ybuffer,y_ptr,inc_y);
y_ptr += 64 * inc_y;
a_ptr += 64;

}

if ( m2 & 32 )
{
sgemv_kernel_32(n2,alpha,a_ptr,lda,xbuffer,ybuffer);
add_y(32,ybuffer,y_ptr,inc_y);


+ 121
- 16
kernel/x86_64/sgemv_n_microk_bulldozer.c View File

@@ -25,12 +25,11 @@ OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*****************************************************************************/


static void sgemv_kernel_32( long n, float alpha, float *a, long lda, float *x, float *y)
static void sgemv_kernel_64( long n, float alpha, float *a, long lda, float *x, float *y)
{


float *pre = a + lda*4*2;
float *pre = a + lda*3;

__asm __volatile
(
@@ -44,38 +43,143 @@ static void sgemv_kernel_32( long n, float alpha, float *a, long lda, float *x,
"prefetcht0 (%%r8)\n\t" // Prefetch
"prefetcht0 64(%%r8)\n\t" // Prefetch

"vxorps %%ymm8 , %%ymm8 , %%ymm8 \n\t" // set to zero
"vxorps %%ymm9 , %%ymm9 , %%ymm9 \n\t" // set to zero
"vxorps %%ymm10, %%ymm10, %%ymm10\n\t" // set to zero
"vxorps %%ymm11, %%ymm11, %%ymm11\n\t" // set to zero
"vxorps %%ymm12, %%ymm12, %%ymm12\n\t" // set to zero
"vxorps %%ymm13, %%ymm13, %%ymm13\n\t" // set to zero
"vxorps %%ymm14, %%ymm14, %%ymm14\n\t" // set to zero
"vxorps %%ymm15, %%ymm15, %%ymm15\n\t" // set to zero
".align 16 \n\t"
".L01LOOP%=: \n\t"
"vbroadcastss (%%rdi), %%ymm0 \n\t" // load values of c
"addq $4 , %%rdi \n\t" // increment pointer of c

"nop \n\t"
"leaq (%%r8 , %%rcx, 4), %%r8 \n\t" // add lda to pointer for prefetch

"prefetcht0 (%%r8)\n\t" // Prefetch
"vfmaddps %%ymm8 , 0*4(%%rsi), %%ymm0, %%ymm8 \n\t" // multiply a and c and add to temp
"prefetcht0 64(%%r8)\n\t" // Prefetch
"vfmaddps %%ymm9 , 8*4(%%rsi), %%ymm0, %%ymm9 \n\t" // multiply a and c and add to temp
"prefetcht0 128(%%r8)\n\t" // Prefetch
"vfmaddps %%ymm10, 16*4(%%rsi), %%ymm0, %%ymm10\n\t" // multiply a and c and add to temp
"vfmaddps %%ymm11, 24*4(%%rsi), %%ymm0, %%ymm11\n\t" // multiply a and c and add to temp
"prefetcht0 192(%%r8)\n\t" // Prefetch
"vfmaddps %%ymm12, 32*4(%%rsi), %%ymm0, %%ymm12\n\t" // multiply a and c and add to temp
"vfmaddps %%ymm13, 40*4(%%rsi), %%ymm0, %%ymm13\n\t" // multiply a and c and add to temp
"vfmaddps %%ymm14, 48*4(%%rsi), %%ymm0, %%ymm14\n\t" // multiply a and c and add to temp
"vfmaddps %%ymm15, 56*4(%%rsi), %%ymm0, %%ymm15\n\t" // multiply a and c and add to temp

"vfmaddps %%ymm12, 0*4(%%rsi), %%ymm0, %%ymm12\n\t" // multiply a and c and add to temp
"vfmaddps %%ymm13, 8*4(%%rsi), %%ymm0, %%ymm13\n\t" // multiply a and c and add to temp
"vfmaddps %%ymm14, 16*4(%%rsi), %%ymm0, %%ymm14\n\t" // multiply a and c and add to temp
"vfmaddps %%ymm15, 24*4(%%rsi), %%ymm0, %%ymm15\n\t" // multiply a and c and add to temp

"addq $4 , %%rdi \n\t" // increment pointer of c
"leaq (%%rsi, %%rcx, 4), %%rsi \n\t" // add lda to pointer of a

"dec %%rax \n\t" // n = n -1
"jnz .L01LOOP%= \n\t"

"vmulps %%ymm8 , %%ymm1, %%ymm8 \n\t" // scale by alpha
"vmulps %%ymm9 , %%ymm1, %%ymm9 \n\t" // scale by alpha
"vmulps %%ymm10, %%ymm1, %%ymm10\n\t" // scale by alpha
"vmulps %%ymm11, %%ymm1, %%ymm11\n\t" // scale by alpha
"vmulps %%ymm12, %%ymm1, %%ymm12\n\t" // scale by alpha
"vmulps %%ymm13, %%ymm1, %%ymm13\n\t" // scale by alpha
"vmulps %%ymm14, %%ymm1, %%ymm14\n\t" // scale by alpha
"vmulps %%ymm15, %%ymm1, %%ymm15\n\t" // scale by alpha

"vmovups %%ymm12, (%%rdx) \n\t" // store temp -> y
"vmovups %%ymm13, 8*4(%%rdx) \n\t" // store temp -> y
"vmovups %%ymm14, 16*4(%%rdx) \n\t" // store temp -> y
"vmovups %%ymm15, 24*4(%%rdx) \n\t" // store temp -> y
"vmovups %%ymm8 , (%%rdx) \n\t" // store temp -> y
"vmovups %%ymm9 , 8*4(%%rdx) \n\t" // store temp -> y
"vmovups %%ymm10, 16*4(%%rdx) \n\t" // store temp -> y
"vmovups %%ymm11, 24*4(%%rdx) \n\t" // store temp -> y
"vmovups %%ymm12, 32*4(%%rdx) \n\t" // store temp -> y
"vmovups %%ymm13, 40*4(%%rdx) \n\t" // store temp -> y
"vmovups %%ymm14, 48*4(%%rdx) \n\t" // store temp -> y
"vmovups %%ymm15, 56*4(%%rdx) \n\t" // store temp -> y

:
:
"m" (n), // 0
"m" (alpha), // 1
"m" (a), // 2
"m" (lda), // 3
"m" (x), // 4
"m" (y), // 5
"m" (pre) // 6
: "rax", "rcx", "rdx", "rsi", "rdi", "r8", "r9", "r10", "r11",
"xmm0" , "xmm1",
"xmm8", "xmm9", "xmm10", "xmm11",
"xmm12", "xmm13", "xmm14", "xmm15",
"memory"
);

}



static void sgemv_kernel_32( long n, float alpha, float *a, long lda, float *x, float *y)
{


float *pre = a + lda*3;

__asm __volatile
(
"movq %0, %%rax\n\t" // n -> rax
"vbroadcastss %1, %%xmm1\n\t" // alpha -> xmm1
"movq %2, %%rsi\n\t" // adress of a -> rsi
"movq %3, %%rcx\n\t" // value of lda > rcx
"movq %4, %%rdi\n\t" // adress of x -> rdi
"movq %5, %%rdx\n\t" // adress of y -> rdx
"movq %6, %%r8\n\t" // address for prefetch
"prefetcht0 (%%r8)\n\t" // Prefetch
"prefetcht0 64(%%r8)\n\t" // Prefetch

"vxorps %%xmm8 , %%xmm8 , %%xmm8 \n\t" // set to zero
"vxorps %%xmm9 , %%xmm9 , %%xmm9 \n\t" // set to zero
"vxorps %%xmm10, %%xmm10, %%xmm10\n\t" // set to zero
"vxorps %%xmm11, %%xmm11, %%xmm11\n\t" // set to zero
"vxorps %%xmm12, %%xmm12, %%xmm12\n\t" // set to zero
"vxorps %%xmm13, %%xmm13, %%xmm13\n\t" // set to zero
"vxorps %%xmm14, %%xmm14, %%xmm14\n\t" // set to zero
"vxorps %%xmm15, %%xmm15, %%xmm15\n\t" // set to zero
".align 16 \n\t"
".L01LOOP%=: \n\t"
"vbroadcastss (%%rdi), %%xmm0 \n\t" // load values of c
"nop \n\t"
"leaq (%%r8 , %%rcx, 4), %%r8 \n\t" // add lda to pointer for prefetch

"prefetcht0 (%%r8)\n\t" // Prefetch
"vfmaddps %%xmm8 , 0*4(%%rsi), %%xmm0, %%xmm8 \n\t" // multiply a and c and add to temp
"prefetcht0 64(%%r8)\n\t" // Prefetch
"vfmaddps %%xmm9 , 4*4(%%rsi), %%xmm0, %%xmm9 \n\t" // multiply a and c and add to temp
"vfmaddps %%xmm10, 8*4(%%rsi), %%xmm0, %%xmm10\n\t" // multiply a and c and add to temp
"vfmaddps %%xmm11, 12*4(%%rsi), %%xmm0, %%xmm11\n\t" // multiply a and c and add to temp
"vfmaddps %%xmm12, 16*4(%%rsi), %%xmm0, %%xmm12\n\t" // multiply a and c and add to temp
"vfmaddps %%xmm13, 20*4(%%rsi), %%xmm0, %%xmm13\n\t" // multiply a and c and add to temp
"vfmaddps %%xmm14, 24*4(%%rsi), %%xmm0, %%xmm14\n\t" // multiply a and c and add to temp
"vfmaddps %%xmm15, 28*4(%%rsi), %%xmm0, %%xmm15\n\t" // multiply a and c and add to temp

"addq $4 , %%rdi \n\t" // increment pointer of c
"leaq (%%rsi, %%rcx, 4), %%rsi \n\t" // add lda to pointer of a

"dec %%rax \n\t" // n = n -1
"jnz .L01LOOP%= \n\t"

"vmulps %%xmm8 , %%xmm1, %%xmm8 \n\t" // scale by alpha
"vmulps %%xmm9 , %%xmm1, %%xmm9 \n\t" // scale by alpha
"vmulps %%xmm10, %%xmm1, %%xmm10\n\t" // scale by alpha
"vmulps %%xmm11, %%xmm1, %%xmm11\n\t" // scale by alpha
"vmulps %%xmm12, %%xmm1, %%xmm12\n\t" // scale by alpha
"vmulps %%xmm13, %%xmm1, %%xmm13\n\t" // scale by alpha
"vmulps %%xmm14, %%xmm1, %%xmm14\n\t" // scale by alpha
"vmulps %%xmm15, %%xmm1, %%xmm15\n\t" // scale by alpha

"vmovups %%xmm8 , (%%rdx) \n\t" // store temp -> y
"vmovups %%xmm9 , 4*4(%%rdx) \n\t" // store temp -> y
"vmovups %%xmm10, 8*4(%%rdx) \n\t" // store temp -> y
"vmovups %%xmm11, 12*4(%%rdx) \n\t" // store temp -> y
"vmovups %%xmm12, 16*4(%%rdx) \n\t" // store temp -> y
"vmovups %%xmm13, 20*4(%%rdx) \n\t" // store temp -> y
"vmovups %%xmm14, 24*4(%%rdx) \n\t" // store temp -> y
"vmovups %%xmm15, 28*4(%%rdx) \n\t" // store temp -> y

:
:
@@ -88,6 +192,7 @@ static void sgemv_kernel_32( long n, float alpha, float *a, long lda, float *x,
"m" (pre) // 6
: "rax", "rcx", "rdx", "rsi", "rdi", "r8", "r9", "r10", "r11",
"xmm0" , "xmm1",
"xmm8", "xmm9", "xmm10", "xmm11",
"xmm12", "xmm13", "xmm14", "xmm15",
"memory"
);
@@ -97,7 +202,7 @@ static void sgemv_kernel_32( long n, float alpha, float *a, long lda, float *x,
static void sgemv_kernel_16( long n, float alpha, float *a, long lda, float *x, float *y)
{

float *pre = a + lda*4*3;
float *pre = a + lda*1;

__asm __volatile
(


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