1 // Auto-generated file. Do not edit!
2 // Template: src/f32-vsqrt/avx512f-nr1fma1adj.c.in
3 // Generator: tools/xngen
4 //
5 // Copyright 2020 Google LLC
6 //
7 // This source code is licensed under the BSD-style license found in the
8 // LICENSE file in the root directory of this source tree.
9
10 #include <assert.h>
11
12 #include <immintrin.h>
13
14 #include <xnnpack/common.h>
15 #include <xnnpack/intrinsics-polyfill.h>
16 #include <xnnpack/vunary.h>
17
18
xnn_f32_vsqrt_ukernel__avx512f_nr1fma1adj_x48(size_t n,const float * x,float * y,const union xnn_f32_sqrt_params params[restrict XNN_MIN_ELEMENTS (1)])19 void xnn_f32_vsqrt_ukernel__avx512f_nr1fma1adj_x48(
20 size_t n,
21 const float* x,
22 float* y,
23 const union xnn_f32_sqrt_params params[restrict XNN_MIN_ELEMENTS(1)])
24 {
25 assert(n != 0);
26 assert(n % sizeof(float) == 0);
27
28 const __m512 vhalf = _mm512_set1_ps(params->fma.half);
29 for (; n >= 48 * sizeof(float); n -= 48 * sizeof(float)) {
30 const __m512 vx0 = _mm512_loadu_ps(x);
31 const __m512 vx1 = _mm512_loadu_ps(x + 16);
32 const __m512 vx2 = _mm512_loadu_ps(x + 32);
33 x += 48;
34
35 const __m512 vrsqrtx0 = _mm512_rsqrt14_ps(vx0);
36 const __m512 vrsqrtx1 = _mm512_rsqrt14_ps(vx1);
37 const __m512 vrsqrtx2 = _mm512_rsqrt14_ps(vx2);
38
39 __m512 vsqrtx0 = _mm512_mul_ps(vrsqrtx0, vx0);
40 __m512 vhalfrsqrtx0 = _mm512_mul_ps(vrsqrtx0, vhalf);
41 __m512 vsqrtx1 = _mm512_mul_ps(vrsqrtx1, vx1);
42 __m512 vhalfrsqrtx1 = _mm512_mul_ps(vrsqrtx1, vhalf);
43 __m512 vsqrtx2 = _mm512_mul_ps(vrsqrtx2, vx2);
44 __m512 vhalfrsqrtx2 = _mm512_mul_ps(vrsqrtx2, vhalf);
45
46 const __m512 vresidual0 = _mm512_fnmadd_ps(vsqrtx0, vhalfrsqrtx0, vhalf);
47 const __m512 vresidual1 = _mm512_fnmadd_ps(vsqrtx1, vhalfrsqrtx1, vhalf);
48 const __m512 vresidual2 = _mm512_fnmadd_ps(vsqrtx2, vhalfrsqrtx2, vhalf);
49
50 vhalfrsqrtx0 = _mm512_fmadd_ps(vhalfrsqrtx0, vresidual0, vhalfrsqrtx0);
51 vsqrtx0 = _mm512_fmadd_ps(vsqrtx0, vresidual0, vsqrtx0);
52 vhalfrsqrtx1 = _mm512_fmadd_ps(vhalfrsqrtx1, vresidual1, vhalfrsqrtx1);
53 vsqrtx1 = _mm512_fmadd_ps(vsqrtx1, vresidual1, vsqrtx1);
54 vhalfrsqrtx2 = _mm512_fmadd_ps(vhalfrsqrtx2, vresidual2, vhalfrsqrtx2);
55 vsqrtx2 = _mm512_fmadd_ps(vsqrtx2, vresidual2, vsqrtx2);
56
57 const __m512 vadjustment0 = _mm512_fnmadd_ps(vsqrtx0, vsqrtx0, vx0);
58 const __m512 vadjustment1 = _mm512_fnmadd_ps(vsqrtx1, vsqrtx1, vx1);
59 const __m512 vadjustment2 = _mm512_fnmadd_ps(vsqrtx2, vsqrtx2, vx2);
60
61 const __m512 vy0 = _mm512_fmadd_ps(vhalfrsqrtx0, vadjustment0, vsqrtx0);
62 const __m512 vy1 = _mm512_fmadd_ps(vhalfrsqrtx1, vadjustment1, vsqrtx1);
63 const __m512 vy2 = _mm512_fmadd_ps(vhalfrsqrtx2, vadjustment2, vsqrtx2);
64
65 _mm512_storeu_ps(y, vy0);
66 _mm512_storeu_ps(y + 16, vy1);
67 _mm512_storeu_ps(y + 32, vy2);
68 y += 48;
69 }
70 for (; n >= 16 * sizeof(float); n -= 16 * sizeof(float)) {
71 const __m512 vx = _mm512_loadu_ps(x);
72 x += 16;
73
74 const __m512 vrsqrtx = _mm512_rsqrt14_ps(vx);
75 __m512 vsqrtx = _mm512_mul_ps(vrsqrtx, vx);
76 __m512 vhalfrsqrtx = _mm512_mul_ps(vrsqrtx, vhalf);
77 const __m512 vresidual = _mm512_fnmadd_ps(vsqrtx, vhalfrsqrtx, vhalf);
78 vhalfrsqrtx = _mm512_fmadd_ps(vhalfrsqrtx, vresidual, vhalfrsqrtx);
79 vsqrtx = _mm512_fmadd_ps(vsqrtx, vresidual, vsqrtx);
80 const __m512 vadjustment = _mm512_fnmadd_ps(vsqrtx, vsqrtx, vx);
81 const __m512 vy = _mm512_fmadd_ps(vhalfrsqrtx, vadjustment, vsqrtx);
82
83 _mm512_storeu_ps(y, vy);
84 y += 16;
85 }
86 if XNN_UNLIKELY(n != 0) {
87 assert(n >= 1 * sizeof(float));
88 assert(n <= 15 * sizeof(float));
89 // Prepare mask for valid 32-bit elements (depends on n).
90 n >>= 2 /* log2(sizeof(float)) */;
91 const __mmask16 vmask = _cvtu32_mask16((uint16_t) ((uint32_t) (UINT32_C(1) << n) - UINT32_C(1)));
92
93 const __m512 vx = _mm512_maskz_loadu_ps(vmask, x);
94 const __m512 vrsqrtx = _mm512_rsqrt14_ps(vx);
95 __m512 vsqrtx = _mm512_mul_ps(vrsqrtx, vx);
96 __m512 vhalfrsqrtx = _mm512_mul_ps(vrsqrtx, vhalf);
97 const __m512 vresidual = _mm512_fnmadd_ps(vsqrtx, vhalfrsqrtx, vhalf);
98 vhalfrsqrtx = _mm512_fmadd_ps(vhalfrsqrtx, vresidual, vhalfrsqrtx);
99 vsqrtx = _mm512_fmadd_ps(vsqrtx, vresidual, vsqrtx);
100 const __m512 vadjustment = _mm512_fnmadd_ps(vsqrtx, vsqrtx, vx);
101 const __m512 vy = _mm512_fmadd_ps(vhalfrsqrtx, vadjustment, vsqrtx);
102
103 _mm512_mask_storeu_ps(y, vmask, vy);
104 }
105 }
106