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Optimise srot for POWER9
Use lxvd2x instruction instead of lxvw4x. lxvd2x performs far better on the new POWER architecture than lxvw4x.tags/v0.2.20^2
Matt Brown
9 years ago
1 changed files with 32 additions and 32 deletions
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+ 32
- 32
kernel/power/srot_microk_power8.c
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| @@ -57,15 +57,15 @@ static void srot_kernel_16 (long n, float *x, float *y, float c, float s) | |||
| "xscvdpspn 37, %x14 \n\t" // load s to all words | |||
| "xxspltw 37, 37, 0 \n\t" | |||
| "lxvw4x 32, 0, %3 \n\t" // load x | |||
| "lxvw4x 33, %15, %3 \n\t" | |||
| "lxvw4x 34, %16, %3 \n\t" | |||
| "lxvw4x 35, %17, %3 \n\t" | |||
| "lxvd2x 32, 0, %3 \n\t" // load x | |||
| "lxvd2x 33, %15, %3 \n\t" | |||
| "lxvd2x 34, %16, %3 \n\t" | |||
| "lxvd2x 35, %17, %3 \n\t" | |||
| "lxvw4x 48, 0, %4 \n\t" // load y | |||
| "lxvw4x 49, %15, %4 \n\t" | |||
| "lxvw4x 50, %16, %4 \n\t" | |||
| "lxvw4x 51, %17, %4 \n\t" | |||
| "lxvd2x 48, 0, %4 \n\t" // load y | |||
| "lxvd2x 49, %15, %4 \n\t" | |||
| "lxvd2x 50, %16, %4 \n\t" | |||
| "lxvd2x 51, %17, %4 \n\t" | |||
| "addi %3, %3, 64 \n\t" | |||
| "addi %4, %4, 64 \n\t" | |||
| @@ -89,26 +89,26 @@ static void srot_kernel_16 (long n, float *x, float *y, float c, float s) | |||
| "xvmulsp 44, 32, 37 \n\t" // s * x | |||
| "xvmulsp 45, 33, 37 \n\t" | |||
| "lxvw4x 32, 0, %3 \n\t" // load x | |||
| "lxvw4x 33, %15, %3 \n\t" | |||
| "lxvd2x 32, 0, %3 \n\t" // load x | |||
| "lxvd2x 33, %15, %3 \n\t" | |||
| "xvmulsp 46, 34, 37 \n\t" | |||
| "xvmulsp 47, 35, 37 \n\t" | |||
| "lxvw4x 34, %16, %3 \n\t" | |||
| "lxvw4x 35, %17, %3 \n\t" | |||
| "lxvd2x 34, %16, %3 \n\t" | |||
| "lxvd2x 35, %17, %3 \n\t" | |||
| "xvmulsp %x9, 48, 37 \n\t" // s * y | |||
| "xvmulsp %x10, 49, 37 \n\t" | |||
| "lxvw4x 48, 0, %4 \n\t" // load y | |||
| "lxvw4x 49, %15, %4 \n\t" | |||
| "lxvd2x 48, 0, %4 \n\t" // load y | |||
| "lxvd2x 49, %15, %4 \n\t" | |||
| "xvmulsp %x11, 50, 37 \n\t" | |||
| "xvmulsp %x12, 51, 37 \n\t" | |||
| "lxvw4x 50, %16, %4 \n\t" | |||
| "lxvw4x 51, %17, %4 \n\t" | |||
| "lxvd2x 50, %16, %4 \n\t" | |||
| "lxvd2x 51, %17, %4 \n\t" | |||
| "xvaddsp 40, 40, %x9 \n\t" // c * x + s * y | |||
| "xvaddsp 41, 41, %x10 \n\t" // c * x + s * y | |||
| @@ -124,15 +124,15 @@ static void srot_kernel_16 (long n, float *x, float *y, float c, float s) | |||
| "xvsubsp %x7, %x7, 46 \n\t" // c * y - s * x | |||
| "xvsubsp %x8, %x8, 47 \n\t" // c * y - s * x | |||
| "stxvw4x 40, 0, %3 \n\t" // store x | |||
| "stxvw4x 41, %15, %3 \n\t" | |||
| "stxvw4x 42, %16, %3 \n\t" | |||
| "stxvw4x 43, %17, %3 \n\t" | |||
| "stxvd2x 40, 0, %3 \n\t" // store x | |||
| "stxvd2x 41, %15, %3 \n\t" | |||
| "stxvd2x 42, %16, %3 \n\t" | |||
| "stxvd2x 43, %17, %3 \n\t" | |||
| "stxvw4x %x5, 0, %4 \n\t" // store y | |||
| "stxvw4x %x6, %15, %4 \n\t" | |||
| "stxvw4x %x7, %16, %4 \n\t" | |||
| "stxvw4x %x8, %17, %4 \n\t" | |||
| "stxvd2x %x5, 0, %4 \n\t" // store y | |||
| "stxvd2x %x6, %15, %4 \n\t" | |||
| "stxvd2x %x7, %16, %4 \n\t" | |||
| "stxvd2x %x8, %17, %4 \n\t" | |||
| "addi %3, %3, 128 \n\t" | |||
| "addi %4, %4, 128 \n\t" | |||
| @@ -175,15 +175,15 @@ static void srot_kernel_16 (long n, float *x, float *y, float c, float s) | |||
| "xvsubsp %x7, %x7, 46 \n\t" // c * y - s * x | |||
| "xvsubsp %x8, %x8, 47 \n\t" // c * y - s * x | |||
| "stxvw4x 40, 0, %3 \n\t" // store x | |||
| "stxvw4x 41, %15, %3 \n\t" | |||
| "stxvw4x 42, %16, %3 \n\t" | |||
| "stxvw4x 43, %17, %3 \n\t" | |||
| "stxvd2x 40, 0, %3 \n\t" // store x | |||
| "stxvd2x 41, %15, %3 \n\t" | |||
| "stxvd2x 42, %16, %3 \n\t" | |||
| "stxvd2x 43, %17, %3 \n\t" | |||
| "stxvw4x %x5, 0, %4 \n\t" // store y | |||
| "stxvw4x %x6, %15, %4 \n\t" | |||
| "stxvw4x %x7, %16, %4 \n\t" | |||
| "stxvw4x %x8, %17, %4 \n" | |||
| "stxvd2x %x5, 0, %4 \n\t" // store y | |||
| "stxvd2x %x6, %15, %4 \n\t" | |||
| "stxvd2x %x7, %16, %4 \n\t" | |||
| "stxvd2x %x8, %17, %4 \n" | |||
| "#n=%2 x=%0=%3 y=%1=%4 c=%13 s=%14 o16=%15 o32=%16 o48=%17\n" | |||
| "#t0=%x5 t1=%x6 t2=%x7 t3=%x8 t4=%x9 t5=%x10 t6=%x11 t7=%x12" | |||