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/*
* Copyright (c) 2017-2018 ARM Limited.
*
* SPDX-License-Identifier: MIT
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#if defined(__aarch64__) && defined(__ARM_FEATURE_FP16_SCALAR_ARITHMETIC)
#include <arm_neon.h>
#include "../../asmlib.hpp"
// Kernel implementation.
//
// Assume that "Apanel" points to a chunk of A blocks (each size 8xK) in read-order.
// Assume that "Bpanel" points to a chunk of B blocks (each size 12xK) in read-order.
// Assume that "Cpanel" points to a chunk of C output blocks (each size
// 12x8), the chunks being arranged in a row major fashion.
//
// Note that the intent of this is that either ablocks or bblocks will be 1
// - this construction allows the output loop to proceed in either order.
namespace arm_gemm
{
void a64_hgemm_asimd_24x8(const __fp16 *Apanel, const __fp16 *Bpanel, __fp16 *Cpanel, int ablocks, int bblocks, int K)
{
const __fp16 *a_ptr = Apanel;
__fp16 *c_ptr = Cpanel;
for(int yb = 0; yb < ablocks; yb++)
{
const __fp16 *a_ptr0 = a_ptr;
const __fp16 *b_ptr = Bpanel;
for(int xb = 0; xb < bblocks; xb++)
{
a_ptr = a_ptr0;
// Fix up for odd lengths - set a flag if K is odd, but make
// sure we round up the iteration count.
int oddk = (K & 1);
int k = ((K + 1) / 2) - 1;
register float16x8_t a0 asm("v0");
register float16x8_t a0a asm("v1");
register float16x8_t b0 asm("v2");
register float16x8_t b1 asm("v3");
register float16x8_t b2 asm("v4");
register float16x8_t b0a asm("v5");
register float16x8_t b1a asm("v6");
register float16x8_t b2a asm("v7");
__asm __volatile(
".arch armv8.2-a+fp16\n"
// Initialize result registers, load initial operands, prime prefetches.
"movi v8.8h, #0x0\n"
"ldr %q[a0], [%[a_ptr]]\n"
"movi v9.8h, #0x0\n"
"ldr %q[b0], [%[b_ptr]]\n"
"movi v10.8h, #0x0\n"
"ldr %q[b1], [%[b_ptr], #16]\n"
"movi v11.8h, #0x0\n"
"ldr %q[b2], [%[b_ptr], #32]\n"
"movi v12.8h, #0x0\n"
"ldr %q[b0a], [%[b_ptr], #48]\n"
"movi v13.8h, #0x0\n"
"ldr %q[b1a], [%[b_ptr], #64]\n"
"movi v14.8h, #0x0\n" ASM_PREFETCH("[%[b_ptr], #64]") "movi v15.8h, #0x0\n" ASM_PREFETCH("[%[b_ptr], #128]") "movi v16.8h, #0x0\n" ASM_PREFETCH("[%[a_ptr], #64]") "movi v17.8h, #0x0\n"
ASM_PREFETCH("[%[b_ptr], #192]") "movi v18.8h, #0x0\n" ASM_PREFETCH("[%[b_ptr], #256]") "movi v19.8h, #0x0\n" ASM_PREFETCH("[%[b_ptr], #320]")
"movi v20.8h, #0x0\n"
"movi v21.8h, #0x0\n"
"movi v22.8h, #0x0\n"
"movi v23.8h, #0x0\n"
"movi v24.8h, #0x0\n"
"movi v25.8h, #0x0\n"
"movi v26.8h, #0x0\n"
"movi v27.8h, #0x0\n"
"movi v28.8h, #0x0\n"
"movi v29.8h, #0x0\n"
"movi v30.8h, #0x0\n"
"movi v31.8h, #0x0\n"
// Skip loop if we are doing zero iterations of it.
"cbz %w[k], 4f\n"
"1:\n"
"fmla v8.8h , %[b0].8h, %[a0].h[0]\n"
"fmla v9.8h , %[b0].8h, %[a0].h[1]\n"
"ldr %q[a0a], [%[a_ptr], #16]\n"
"fmla v10.8h, %[b0].8h, %[a0].h[2]\n"
"fmla v11.8h, %[b0].8h, %[a0].h[3]\n"
"ldr %q[b2a], [%[b_ptr], #80]\n"
"fmla v12.8h, %[b0].8h, %[a0].h[4]\n"
"fmla v13.8h, %[b0].8h, %[a0].h[5]\n"
"fmla v14.8h, %[b0].8h, %[a0].h[6]\n"
"fmla v15.8h, %[b0].8h, %[a0].h[7]\n"
"ldr %q[b0], [%[b_ptr], #96]\n"
"fmla v16.8h, %[b1].8h, %[a0].h[0]\n"
"fmla v17.8h, %[b1].8h, %[a0].h[1]\n" ASM_PREFETCH("[%[a_ptr], #128]")
"fmla v18.8h, %[b1].8h, %[a0].h[2]\n"
"fmla v19.8h, %[b1].8h, %[a0].h[3]\n"
"add %[b_ptr], %[b_ptr], #96\n"
"fmla v20.8h, %[b1].8h, %[a0].h[4]\n"
"fmla v21.8h, %[b1].8h, %[a0].h[5]\n"
"fmla v22.8h, %[b1].8h, %[a0].h[6]\n"
"fmla v23.8h, %[b1].8h, %[a0].h[7]\n"
"ldr %q[b1], [%[b_ptr], #16]\n"
"fmla v24.8h, %[b2].8h, %[a0].h[0]\n"
"fmla v25.8h, %[b2].8h, %[a0].h[1]\n" ASM_PREFETCH("[%[b_ptr], #288]")
"fmla v26.8h, %[b2].8h, %[a0].h[2]\n"
"fmla v27.8h, %[b2].8h, %[a0].h[3]\n"
"fmla v28.8h, %[b2].8h, %[a0].h[4]\n"
"fmla v29.8h, %[b2].8h, %[a0].h[5]\n"
"fmla v30.8h, %[b2].8h, %[a0].h[6]\n"
"fmla v31.8h, %[b2].8h, %[a0].h[7]\n"
"ldr %q[a0], [%[a_ptr], #32]\n"
"fmla v8.8h , %[b0a].8h, %[a0a].h[0]\n"
"fmla v9.8h , %[b0a].8h, %[a0a].h[1]\n"
"ldr %q[b2], [%[b_ptr], #32]\n"
"fmla v10.8h, %[b0a].8h, %[a0a].h[2]\n"
"fmla v11.8h, %[b0a].8h, %[a0a].h[3]\n"
"fmla v12.8h, %[b0a].8h, %[a0a].h[4]\n"
"fmla v13.8h, %[b0a].8h, %[a0a].h[5]\n"
"fmla v14.8h, %[b0a].8h, %[a0a].h[6]\n"
"fmla v15.8h, %[b0a].8h, %[a0a].h[7]\n"
"ldr %q[b0a], [%[b_ptr], #48]\n"
"fmla v16.8h, %[b1a].8h, %[a0a].h[0]\n"
"fmla v17.8h, %[b1a].8h, %[a0a].h[1]\n" ASM_PREFETCH("[%[b_ptr], #352]")
"fmla v18.8h, %[b1a].8h, %[a0a].h[2]\n"
"fmla v19.8h, %[b1a].8h, %[a0a].h[3]\n"
"fmla v20.8h, %[b1a].8h, %[a0a].h[4]\n"
"fmla v21.8h, %[b1a].8h, %[a0a].h[5]\n"
"fmla v22.8h, %[b1a].8h, %[a0a].h[6]\n"
"fmla v23.8h, %[b1a].8h, %[a0a].h[7]\n"
"ldr %q[b1a], [%[b_ptr], #64]\n"
"fmla v24.8h, %[b2a].8h, %[a0a].h[0]\n"
"fmla v25.8h, %[b2a].8h, %[a0a].h[1]\n"
"add %[a_ptr], %[a_ptr], #32\n"
"fmla v26.8h, %[b2a].8h, %[a0a].h[2]\n"
"fmla v27.8h, %[b2a].8h, %[a0a].h[3]\n"
"fmla v28.8h, %[b2a].8h, %[a0a].h[4]\n"
"fmla v29.8h, %[b2a].8h, %[a0a].h[5]\n"
"subs %w[k], %w[k], #1\n"
"fmla v30.8h, %[b2a].8h, %[a0a].h[6]\n"
"fmla v31.8h, %[b2a].8h, %[a0a].h[7]\n"
"bne 1b\n"
"4:\n"
// Jump to odd tail if necessary.
"cbnz %w[oddk], 2f\n"
// Even tail.
"fmla v8.8h , %[b0].8h, %[a0].h[0]\n"
"fmla v9.8h , %[b0].8h, %[a0].h[1]\n"
"ldr %q[a0a], [%[a_ptr], #16]\n"
"fmla v10.8h, %[b0].8h, %[a0].h[2]\n"
"fmla v11.8h, %[b0].8h, %[a0].h[3]\n"
"ldr %q[b2a], [%[b_ptr], #80]\n"
"fmla v12.8h, %[b0].8h, %[a0].h[4]\n"
"fmla v13.8h, %[b0].8h, %[a0].h[5]\n"
"fmla v14.8h, %[b0].8h, %[a0].h[6]\n"
"fmla v15.8h, %[b0].8h, %[a0].h[7]\n"
"fmla v16.8h, %[b1].8h, %[a0].h[0]\n"
"fmla v17.8h, %[b1].8h, %[a0].h[1]\n"
"add %[b_ptr], %[b_ptr], #96\n"
"fmla v18.8h, %[b1].8h, %[a0].h[2]\n"
"fmla v19.8h, %[b1].8h, %[a0].h[3]\n"
"fmla v20.8h, %[b1].8h, %[a0].h[4]\n"
"fmla v21.8h, %[b1].8h, %[a0].h[5]\n"
"add %[a_ptr], %[a_ptr], #32\n"
"fmla v22.8h, %[b1].8h, %[a0].h[6]\n"
"fmla v23.8h, %[b1].8h, %[a0].h[7]\n"
"fmla v24.8h, %[b2].8h, %[a0].h[0]\n"
"fmla v25.8h, %[b2].8h, %[a0].h[1]\n"
"fmla v26.8h, %[b2].8h, %[a0].h[2]\n"
"fmla v27.8h, %[b2].8h, %[a0].h[3]\n"
"fmla v28.8h, %[b2].8h, %[a0].h[4]\n"
"fmla v29.8h, %[b2].8h, %[a0].h[5]\n"
"fmla v30.8h, %[b2].8h, %[a0].h[6]\n"
"fmla v31.8h, %[b2].8h, %[a0].h[7]\n"
"fmla v8.8h , %[b0a].8h, %[a0a].h[0]\n"
"fmla v16.8h, %[b1a].8h, %[a0a].h[0]\n"
"str q8, [%[c_ptr]]\n"
"fmla v24.8h, %[b2a].8h, %[a0a].h[0]\n"
"str q16, [%[c_ptr], #16]\n"
"fmla v9.8h , %[b0a].8h, %[a0a].h[1]\n"
"str q24, [%[c_ptr], #32]\n"
"fmla v17.8h, %[b1a].8h, %[a0a].h[1]\n"
"str q9, [%[c_ptr], #48]\n"
"fmla v25.8h, %[b2a].8h, %[a0a].h[1]\n"
"str q17, [%[c_ptr], #64]\n"
"fmla v10.8h, %[b0a].8h, %[a0a].h[2]\n"
"str q25, [%[c_ptr], #80]\n"
"fmla v18.8h, %[b1a].8h, %[a0a].h[2]\n"
"str q10, [%[c_ptr], #96]\n"
"fmla v26.8h, %[b2a].8h, %[a0a].h[2]\n"
"str q18, [%[c_ptr], #112]\n"
"fmla v11.8h, %[b0a].8h, %[a0a].h[3]\n"
"str q26, [%[c_ptr], #128]\n"
"fmla v19.8h, %[b1a].8h, %[a0a].h[3]\n"
"str q11, [%[c_ptr], #144]\n"
"fmla v27.8h, %[b2a].8h, %[a0a].h[3]\n"
"str q19, [%[c_ptr], #160]\n"
"fmla v12.8h, %[b0a].8h, %[a0a].h[4]\n"
"str q27, [%[c_ptr], #176]\n"
"fmla v20.8h, %[b1a].8h, %[a0a].h[4]\n"
"str q12, [%[c_ptr], #192]\n"
"fmla v28.8h, %[b2a].8h, %[a0a].h[4]\n"
"str q20, [%[c_ptr], #208]\n"
"fmla v13.8h, %[b0a].8h, %[a0a].h[5]\n"
"str q28, [%[c_ptr], #224]\n"
"fmla v21.8h, %[b1a].8h, %[a0a].h[5]\n"
"str q13, [%[c_ptr], #240]\n"
"fmla v29.8h, %[b2a].8h, %[a0a].h[5]\n"
"str q21, [%[c_ptr], #256]\n"
"fmla v14.8h, %[b0a].8h, %[a0a].h[6]\n"
"str q29, [%[c_ptr], #272]\n"
"fmla v22.8h, %[b1a].8h, %[a0a].h[6]\n"
"str q14, [%[c_ptr], #288]\n"
"fmla v30.8h, %[b2a].8h, %[a0a].h[6]\n"
"str q22, [%[c_ptr], #304]\n"
"fmla v15.8h, %[b0a].8h, %[a0a].h[7]\n"
"str q30, [%[c_ptr], #320]\n"
"fmla v23.8h, %[b1a].8h, %[a0a].h[7]\n"
"str q15, [%[c_ptr], #336]\n"
"fmla v31.8h, %[b2a].8h, %[a0a].h[7]\n"
"b 3f\n"
// Odd tail
"2:\n"
"fmla v8.8h , %[b0].8h, %[a0].h[0]\n"
"add %[b_ptr], %[b_ptr], #48\n"
"fmla v16.8h, %[b1].8h, %[a0].h[0]\n"
"add %[a_ptr], %[a_ptr], #16\n"
"str q8, [%[c_ptr]]\n"
"fmla v24.8h, %[b2].8h, %[a0].h[0]\n"
"str q16, [%[c_ptr], #16]\n"
"fmla v9.8h , %[b0].8h, %[a0].h[1]\n"
"str q24, [%[c_ptr], #32]\n"
"fmla v17.8h, %[b1].8h, %[a0].h[1]\n"
"str q9, [%[c_ptr], #48]\n"
"fmla v25.8h, %[b2].8h, %[a0].h[1]\n"
"str q17, [%[c_ptr], #64]\n"
"fmla v10.8h, %[b0].8h, %[a0].h[2]\n"
"str q25, [%[c_ptr], #80]\n"
"fmla v18.8h, %[b1].8h, %[a0].h[2]\n"
"str q10, [%[c_ptr], #96]\n"
"fmla v26.8h, %[b2].8h, %[a0].h[2]\n"
"str q18, [%[c_ptr], #112]\n"
"fmla v11.8h, %[b0].8h, %[a0].h[3]\n"
"str q26, [%[c_ptr], #128]\n"
"fmla v19.8h, %[b1].8h, %[a0].h[3]\n"
"str q11, [%[c_ptr], #144]\n"
"fmla v27.8h, %[b2].8h, %[a0].h[3]\n"
"str q19, [%[c_ptr], #160]\n"
"fmla v12.8h, %[b0].8h, %[a0].h[4]\n"
"str q27, [%[c_ptr], #176]\n"
"fmla v20.8h, %[b1].8h, %[a0].h[4]\n"
"str q12, [%[c_ptr], #192]\n"
"fmla v28.8h, %[b2].8h, %[a0].h[4]\n"
"str q20, [%[c_ptr], #208]\n"
"fmla v13.8h, %[b0].8h, %[a0].h[5]\n"
"str q28, [%[c_ptr], #224]\n"
"fmla v21.8h, %[b1].8h, %[a0].h[5]\n"
"str q13, [%[c_ptr], #240]\n"
"fmla v29.8h, %[b2].8h, %[a0].h[5]\n"
"str q21, [%[c_ptr], #256]\n"
"fmla v14.8h, %[b0].8h, %[a0].h[6]\n"
"str q29, [%[c_ptr], #272]\n"
"fmla v22.8h, %[b1].8h, %[a0].h[6]\n"
"str q14, [%[c_ptr], #288]\n"
"fmla v30.8h, %[b2].8h, %[a0].h[6]\n"
"str q22, [%[c_ptr], #304]\n"
"fmla v15.8h, %[b0].8h, %[a0].h[7]\n"
"str q30, [%[c_ptr], #320]\n"
"fmla v23.8h, %[b1].8h, %[a0].h[7]\n"
"str q15, [%[c_ptr], #336]\n"
"fmla v31.8h, %[b2].8h, %[a0].h[7]\n"
"3:\n"
"str q23, [%[c_ptr], #352]\n"
"str q31, [%[c_ptr], #368]\n"
"add %[c_ptr], %[c_ptr], #384\n"
:
[a_ptr] "+r"(a_ptr), [b_ptr] "+r"(b_ptr), [c_ptr] "+r"(c_ptr),
[a0] "+w"(a0), [a0a] "+w"(a0a),
[b0] "+w"(b0), [b1] "+w"(b1), [b2] "+w"(b2), [k] "+r"(k),
[b0a] "+w"(b0a), [b1a] "+w"(b1a), [b2a] "+w"(b2a)
: [oddk] "r"(oddk)
: "x20", "x21", "v8", "v9", "v10", "v11", "v12", "v13", "v14", "v15", "v16", "v17", "v18",
"v19", "v20", "v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29", "v30", "v31", "cc");
}
}
}
} // namespace arm_gemm
#endif // __aarch64__ && __ARM_FEATURE_FP16_SCALAR_ARITHMETIC
|
