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// Copyright 2020 Google LLC
//
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree.
$assert DATATYPE in ["F32", "QC8"]
$assert NR == 2
$assert MR % 2 == 0
$assert ACTIVATION in ["LINEAR", "RELU", "MINMAX"]
$assert ACTIVATION != "MINMAX" or ARCH in ["ARM", "X86", "RELAXED"]
$assert not FMA or ARCH == "RELAXED"
#include <assert.h>
#include <wasm_simd128.h>
#include <xnnpack/gemm.h>
$DATATYPE_SPEC = {"F32": "f32", "QC8": "f32_qc8w"}[DATATYPE]
$if ACTIVATION == "MINMAX":
$ WASM_F32X4_MIN={"ARM": "wasm_f32x4_min", "X86": "wasm_f32x4_pmin", "RELAXED": "wasm_f32x4_relaxed_min"}[ARCH]
$ WASM_F32X4_MAX={"ARM": "wasm_f32x4_max", "X86": "wasm_f32x4_pmax", "RELAXED": "wasm_f32x4_relaxed_max"}[ARCH]
$ACTIVATION_SUFFIX = {"LINEAR": ""}.get(ACTIVATION, "_" + ACTIVATION.lower())
$ISA = "wasmsimd" if not FMA and (ACTIVATION in ["LINEAR", "RELU"] or ARCH != "RELAXED") else "wasmrelaxedsimd"
$ARCH_SUFFIX = "" if not FMA and (ACTIVATION in ["LINEAR", "RELU"] or ARCH == "RELAXED") else "_" + ("fma" if FMA else ARCH.lower())
$PARAMS = {"LINEAR": "xnn_f32_default_params", "RELU": "xnn_f32_relu_params", "MINMAX": "xnn_f32_minmax_params"}[ACTIVATION]
void xnn_${DATATYPE_SPEC}_gemm${ACTIVATION_SUFFIX}_ukernel_${MR}x${NR}c4__${ISA}${ARCH_SUFFIX}(
size_t mr,
size_t nc,
size_t kc,
const float* restrict a,
size_t a_stride,
$if DATATYPE == "F32":
const float* restrict w,
$else:
const void* restrict w,
float* restrict c,
size_t cm_stride,
size_t cn_stride,
const union ${PARAMS} params[restrict XNN_MIN_ELEMENTS(1)]) XNN_OOB_READS
{
assert(mr != 0);
assert(mr <= ${MR});
assert(nc != 0);
assert(kc != 0);
assert(kc % sizeof(float) == 0);
assert(a != NULL);
assert(w != NULL);
assert(c != NULL);
const float* a0 = a;
float* c0 = c;
$for M in range(1, MR):
const float* a${M} = (const float*) ((uintptr_t) a${M-1} + a_stride);
float* c${M} = (float*) ((uintptr_t) c${M-1} + cm_stride);
$if M % 2 == 0:
if XNN_UNPREDICTABLE(mr <= ${M}) {
a${M} = a${M-1};
c${M} = c${M-1};
}
$elif M + 1 == MR:
if XNN_UNPREDICTABLE(mr != ${M+1}) {
a${M} = a${M-1};
c${M} = c${M-1};
}
$else:
if XNN_UNPREDICTABLE(mr < ${M+1}) {
a${M} = a${M-1};
c${M} = c${M-1};
}
$if ACTIVATION == "MINMAX":
const v128_t vmin = wasm_v128_load64_splat(params->wasmsimd.min);
const v128_t vmax = wasm_v128_load64_splat(params->wasmsimd.max);
do {
v128_t vacc0x0c4 = wasm_v128_load32_zero(w);
$for N in range(1, NR):
$if DATATYPE == "F32":
v128_t vacc0x${N}c4 = wasm_v128_load32_zero(w + ${N});
$else:
v128_t vacc0x${N}c4 = wasm_v128_load32_zero((const float*) w + ${N});
$for M in range(1, MR):
$for N in range(NR):
v128_t vacc${M}x${N}c4 = vacc0x${N}c4;
$if DATATYPE == "F32":
w += ${NR};
$else:
w = (const float*) w + ${NR};
size_t k = kc;
for (; k >= 4 * sizeof(float); k -= 4 * sizeof(float)) {
$for M in range(MR):
const v128_t va${M} = wasm_v128_load(a${M});
a${M} += 4;
$if DATATYPE == "F32":
const v128_t vb0 = wasm_v128_load(w);
$else:
const v128_t vb0 = wasm_f32x4_convert_i32x4(wasm_i32x4_extend_low_i16x8(wasm_i16x8_extend_low_i8x16(wasm_v128_load32_splat((const int8_t*) w))));
$for N in range(1, NR):
$if DATATYPE == "F32":
const v128_t vb${N} = wasm_v128_load(w + ${N * 4});
$else:
const v128_t vb${N} = wasm_f32x4_convert_i32x4(wasm_i32x4_extend_low_i16x8(wasm_i16x8_extend_low_i8x16(wasm_v128_load32_splat((const int8_t*) w + ${N * 4}))));
$if DATATYPE == "F32":
w += ${NR * 4};
$else:
w = (const int8_t*) w + ${NR * 4};
$for M in range(MR):
$for N in range(NR):
$if FMA:
vacc${M}x${N}c4 = wasm_f32x4_relaxed_madd(va${M}, vb${N}, vacc${M}x${N}c4);
$else:
vacc${M}x${N}c4 = wasm_f32x4_add(wasm_f32x4_mul(va${M}, vb${N}), vacc${M}x${N}c4);
}
if XNN_UNLIKELY(k != 0) {
$for M in range(MR):
const v128_t va${M} = wasm_v128_load(a${M});
a${M} = (const float*) ((uintptr_t) a${M} + k);
$if DATATYPE == "F32":
const v128_t vb0 = wasm_v128_load(w);
$else:
const v128_t vb0 = wasm_f32x4_convert_i32x4(wasm_i32x4_extend_low_i16x8(wasm_i16x8_extend_low_i8x16(wasm_v128_load32_splat((const int8_t*) w))));
$for N in range(1, NR):
$if DATATYPE == "F32":
const v128_t vb${N} = wasm_v128_load(w + ${N * 4});
$else:
const v128_t vb${N} = wasm_f32x4_convert_i32x4(wasm_i32x4_extend_low_i16x8(wasm_i16x8_extend_low_i8x16(wasm_v128_load32_splat((const int8_t*) w + ${N * 4}))));
$if DATATYPE == "F32":
w += ${NR * 4};
$else:
w = (const int8_t*) w + ${NR * 4};
const v128_t vzero = wasm_f32x4_const_splat(0.0f);
$for N in range(NR):
const v128_t vmask${N} = wasm_f32x4_eq(vb${N}, vzero);
$for M in range(MR):
$for N in range(NR):
$if FMA:
vacc${M}x${N}c4 = wasm_f32x4_relaxed_madd(wasm_v128_andnot(va${M}, vmask${N}), vb${N}, vacc${M}x${N}c4);
$else:
vacc${M}x${N}c4 = wasm_f32x4_add(wasm_f32x4_mul(wasm_v128_andnot(va${M}, vmask${N}), vb${N}), vacc${M}x${N}c4);
}
$for M in range(MR):
const v128_t vacc${M}x01c2 = wasm_f32x4_add(
wasm_v32x4_shuffle(vacc${M}x0c4, vacc${M}x1c4, 0, 4, 1, 5),
wasm_v32x4_shuffle(vacc${M}x0c4, vacc${M}x1c4, 2, 6, 3, 7));
$for M in range(0, MR, 2):
v128_t vacc${M}${M+1}x01 = wasm_f32x4_add(
wasm_v32x4_shuffle(vacc${M}x01c2, vacc${M+1}x01c2, 0, 1, 4, 5),
wasm_v32x4_shuffle(vacc${M}x01c2, vacc${M+1}x01c2, 2, 3, 6, 7));
$if DATATYPE == "QC8":
const v128_t vscalex01 = wasm_v128_load64_splat(w);
w = (const float*) w + 2;
$for M in range(0, MR, 2):
vacc${M}${M+1}x01 = wasm_f32x4_mul(vacc${M}${M+1}x01, vscalex01);
$if ACTIVATION == "MINMAX":
$for M in range(0, MR, 2):
vacc${M}${M+1}x01 = ${WASM_F32X4_MAX}(vmin, vacc${M}${M+1}x01);
$for M in range(0, MR, 2):
vacc${M}${M+1}x01 = ${WASM_F32X4_MIN}(vmax, vacc${M}${M+1}x01);
$elif ACTIVATION == "RELU":
const v128_t vzero = wasm_i32x4_const_splat(0);
$for M in range(0, MR, 2):
vacc${M}${M+1}x01 = wasm_i32x4_max(vacc${M}${M+1}x01, vzero);
if XNN_LIKELY(nc >= ${NR}) {
$for M in reversed(range(0, MR, 2)):
wasm_v128_store64_lane(c${M}, vacc${M}${M+1}x01, 0);
c${M} = (float*) ((uintptr_t) c${M} + cn_stride);
a${M} = (const float*) ((uintptr_t) a${M} - kc);
wasm_v128_store64_lane(c${M+1}, vacc${M}${M+1}x01, 1);
c${M+1} = (float*) ((uintptr_t) c${M+1} + cn_stride);
a${M+1} = (const float*) ((uintptr_t) a${M+1} - kc);
nc -= ${NR};
} else {
assert(nc == 1);
$for M in reversed(range(0, MR, 2)):
wasm_v128_store32_lane(c${M}, vacc${M}${M+1}x01, 0);
wasm_v128_store32_lane(c${M+1}, vacc${M}${M+1}x01, 2);
nc = 0;
}
} while (nc != 0);
}
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