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POWER10: Improving dasum performance 

Unrolling a loop in dasum micro code to help in improving
POWER10 performance.
This commit is contained in:
Rajalakshmi Srinivasaraghavan 2021-08-10 22:06:04 -05:00
parent cbc583eb54
commit b06880c2cd
2 changed files with 106 additions and 18 deletions
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4
kernel/power/dasum.c
View File

@ -115,14 +115,14 @@ FLOAT CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x)
{
#if defined(POWER10) && (__BYTE_ORDER__ != __ORDER_BIG_ENDIAN__)
if ( n >= 16 )
if ( n >= 32)
{
BLASLONG align = ((32 - ((uintptr_t)x & (uintptr_t)0x1F)) >> 3) & 0x3;
for (i = 0; i < align; i++) {
sumf += ABS(x[i]);
}
}
n1 = (n-i) & -16;
n1 = (n-i) & -32;
if ( n1 > 0 )
{
sumf += dasum_kernel_16(n1, &x[i]);

120
kernel/power/dasum_microk_power10.c
View File

@ -34,6 +34,19 @@ static double dasum_kernel_16 (long n, double *x)
__vector double t1;
__vector double t2;
__vector double t3;
__vector double t4;
__vector double t5;
__vector double t6;
__vector double t7;
__vector double a0;
__vector double a1;
__vector double a2;
__vector double a3;
__vector double a4;
__vector double a5;
__vector double a6;
__vector double a7;
__asm__
(
@ -48,14 +61,27 @@ static double dasum_kernel_16 (long n, double *x)
"xxlxor 38, 38, 38 \n\t"
"xxlxor 39, 39, 39 \n\t"
"xxlxor %x11, %x11, %x11 \n\t"
"xxlxor %x12, %x12, %x12 \n\t"
"xxlxor %x13, %x13, %x13 \n\t"
"xxlxor %x14, %x14, %x14 \n\t"
"xxlxor %x15, %x15, %x15 \n\t"
"xxlxor %x16, %x16, %x16 \n\t"
"xxlxor %x17, %x17, %x17 \n\t"
"xxlxor %x18, %x18, %x18 \n\t"
"lxvp 40, 0(%2) \n\t"
"lxvp 42, 32(%2) \n\t"
"lxvp 44, 64(%2) \n\t"
"lxvp 46, 96(%2) \n\t"
"lxvp 52, 128(%2) \n\t"
"lxvp 54, 160(%2) \n\t"
"lxvp 56, 192(%2) \n\t"
"lxvp 58, 224(%2) \n\t"
"addi %2, %2, 128 \n\t"
"addi %2, %2, 256 \n\t"
"addic. %1, %1, -16 \n\t"
"addic. %1, %1, -32 \n\t"
"ble two%= \n\t"
".align 5 \n"
@ -65,33 +91,52 @@ static double dasum_kernel_16 (long n, double *x)
"xvabsdp 49, 41 \n\t"
"xvabsdp 50, 42 \n\t"
"xvabsdp 51, 43 \n\t"
"lxvp 40, 0(%2) \n\t"
"xvabsdp %x3, 44 \n\t"
"xvabsdp %x4, 45 \n\t"
"lxvp 42, 32(%2) \n\t"
"xvabsdp %x5, 46 \n\t"
"xvabsdp %x6, 47 \n\t"
"lxvp 44, 64(%2) \n\t"
"xvadddp 32, 32, 48 \n\t"
"xvadddp 33, 33, 49 \n\t"
"lxvp 46, 96(%2) \n\t"
"xvadddp 34, 34, 50 \n\t"
"xvadddp 35, 35, 51 \n\t"
"addi %2, %2, 128 \n\t"
"lxvp 40, 0(%2) \n\t"
"lxvp 42, 32(%2) \n\t"
"lxvp 44, 64(%2) \n\t"
"lxvp 46, 96(%2) \n\t"
"xvadddp 36, 36, %x3 \n\t"
"xvadddp 37, 37, %x4 \n\t"
"addic. %1, %1, -16 \n\t"
"xvadddp 38, 38, %x5 \n\t"
"xvadddp 39, 39, %x6 \n\t"
"xvabsdp 60, 52 \n\t"
"xvabsdp 61, 53 \n\t"
"xvabsdp 62, 54 \n\t"
"xvabsdp 63, 55 \n\t"
"xvabsdp %x7, 56 \n\t"
"xvabsdp %x8, 57 \n\t"
"xvabsdp %x9, 58 \n\t"
"xvabsdp %x10, 59 \n\t"
"xvadddp %x11, %x11, 60 \n\t"
"xvadddp %x12, %x12, 61 \n\t"
"xvadddp %x13, %x13, 62 \n\t"
"xvadddp %x14, %x14, 63 \n\t"
"lxvp 52, 128(%2) \n\t"
"lxvp 54, 160(%2) \n\t"
"lxvp 56, 192(%2) \n\t"
"lxvp 58, 224(%2) \n\t"
"xvadddp %x15, %x15, %x7 \n\t"
"xvadddp %x16, %x16, %x8 \n\t"
"xvadddp %x17, %x17, %x9 \n\t"
"xvadddp %x18, %x18, %x10 \n\t"
"addi %2, %2, 256 \n\t"
"addic. %1, %1, -32 \n\t"
"bgt one%= \n"
"two%=: \n\t"
@ -114,6 +159,25 @@ static double dasum_kernel_16 (long n, double *x)
"xvadddp 38, 38, %x5 \n\t"
"xvadddp 39, 39, %x6 \n\t"
"xvabsdp 60, 52 \n\t"
"xvabsdp 61, 53 \n\t"
"xvabsdp 62, 54 \n\t"
"xvabsdp 63, 55 \n\t"
"xvabsdp %x7, 56 \n\t"
"xvabsdp %x8, 57 \n\t"
"xvabsdp %x9, 58 \n\t"
"xvabsdp %x10, 59 \n\t"
"xvadddp %x11, %x11, 60 \n\t"
"xvadddp %x12, %x12, 61 \n\t"
"xvadddp %x13, %x13, 62 \n\t"
"xvadddp %x14, %x14, 63 \n\t"
"xvadddp %x15, %x15, %x7 \n\t"
"xvadddp %x16, %x16, %x8 \n\t"
"xvadddp %x17, %x17, %x9 \n\t"
"xvadddp %x18, %x18, %x10 \n\t"
"xvadddp 32, 32, 33 \n\t"
"xvadddp 34, 34, 35 \n\t"
"xvadddp 36, 36, 37 \n\t"
@ -122,7 +186,18 @@ static double dasum_kernel_16 (long n, double *x)
"xvadddp 32, 32, 34 \n\t"
"xvadddp 36, 36, 38 \n\t"
"xvadddp %x11, %x11, %x12 \n\t"
"xvadddp %x13, %x13, %x14 \n\t"
"xvadddp %x15, %x15, %x16 \n\t"
"xvadddp %x17, %x17, %x18 \n\t"
"xvadddp %x11, %x11, %x13 \n\t"
"xvadddp %x15, %x15, %x17 \n\t"
"xvadddp %x11, %x11, %x15 \n\t"
"xvadddp 32, 32, 36 \n\t"
"xvadddp 32, 32, %x11 \n\t"
XXSWAPD_S(33,32)
"xsadddp %x0, 32, 33 \n"
@ -136,14 +211,27 @@ static double dasum_kernel_16 (long n, double *x)
"=wa" (t0), // 3
"=wa" (t1), // 4
"=wa" (t2), // 5
"=wa" (t3) // 6
"=wa" (t3), // 6
"=wa" (t4), // 7
"=wa" (t5), // 8
"=wa" (t6), // 9
"=wa" (t7), // 10
"=wa" (a0), // 11
"=wa" (a1), // 12
"=wa" (a2), // 13
"=wa" (a3), // 14
"=wa" (a4), // 15
"=wa" (a5), // 16
"=wa" (a6), // 17
"=wa" (a7) // 18
:
"m" (*x)
:
"cr0",
"vs32","vs33","vs34","vs35","vs36","vs37","vs38","vs39",
"vs40","vs41","vs42","vs43","vs44","vs45","vs46","vs47",
"vs48","vs49","vs50","vs51"
"vs48","vs49","vs50","vs51","vs52","vs53","vs54","vs55",
"vs56","vs57","vs58","vs59","vs60","vs61","vs62","vs63"
);
return sum;