1 // Auto-generated file. Do not edit!
2 // Template: src/f16-dwconv/up-neonfp16arith.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 <arm_neon.h>
13
14 #include <xnnpack/dwconv.h>
15
16
xnn_f16_dwconv_minmax_ukernel_up32x9__neonfp16arith_acc2(size_t channels,size_t output_width,const void ** input,const void * weights,void * output_ptr,size_t input_stride,size_t output_increment,size_t input_offset,const void * zero,const union xnn_f16_minmax_params params[restrict XNN_MIN_ELEMENTS (1)])17 void xnn_f16_dwconv_minmax_ukernel_up32x9__neonfp16arith_acc2(
18 size_t channels,
19 size_t output_width,
20 const void** input,
21 const void* weights,
22 void* output_ptr,
23 size_t input_stride,
24 size_t output_increment,
25 size_t input_offset,
26 const void* zero,
27 const union xnn_f16_minmax_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_OOB_READS
28 {
29 assert(channels != 0);
30 assert(output_width != 0);
31
32 __fp16* output = (__fp16*) output_ptr;
33 const float16x8_t vmax = vreinterpretq_f16_u16(vld1q_dup_u16(¶ms->neon.max));
34 const float16x8_t vmin = vreinterpretq_f16_u16(vld1q_dup_u16(¶ms->neon.min));
35 do {
36 const __fp16* i0 = (const __fp16*) input[0];
37 assert(i0 != NULL);
38 if XNN_UNPREDICTABLE(i0 != (const __fp16*) zero) {
39 i0 = (const __fp16*) ((uintptr_t) i0 + input_offset);
40 }
41 const __fp16* i1 = (const __fp16*) input[1];
42 assert(i1 != NULL);
43 if XNN_UNPREDICTABLE(i1 != (const __fp16*) zero) {
44 i1 = (const __fp16*) ((uintptr_t) i1 + input_offset);
45 }
46 const __fp16* i2 = (const __fp16*) input[2];
47 assert(i2 != NULL);
48 if XNN_UNPREDICTABLE(i2 != (const __fp16*) zero) {
49 i2 = (const __fp16*) ((uintptr_t) i2 + input_offset);
50 }
51 const __fp16* i3 = (const __fp16*) input[3];
52 assert(i3 != NULL);
53 if XNN_UNPREDICTABLE(i3 != (const __fp16*) zero) {
54 i3 = (const __fp16*) ((uintptr_t) i3 + input_offset);
55 }
56 const __fp16* i4 = (const __fp16*) input[4];
57 assert(i4 != NULL);
58 if XNN_UNPREDICTABLE(i4 != (const __fp16*) zero) {
59 i4 = (const __fp16*) ((uintptr_t) i4 + input_offset);
60 }
61 const __fp16* i5 = (const __fp16*) input[5];
62 assert(i5 != NULL);
63 if XNN_UNPREDICTABLE(i5 != (const __fp16*) zero) {
64 i5 = (const __fp16*) ((uintptr_t) i5 + input_offset);
65 }
66 const __fp16* i6 = (const __fp16*) input[6];
67 assert(i6 != NULL);
68 if XNN_UNPREDICTABLE(i6 != (const __fp16*) zero) {
69 i6 = (const __fp16*) ((uintptr_t) i6 + input_offset);
70 }
71 const __fp16* i7 = (const __fp16*) input[7];
72 assert(i7 != NULL);
73 if XNN_UNPREDICTABLE(i7 != (const __fp16*) zero) {
74 i7 = (const __fp16*) ((uintptr_t) i7 + input_offset);
75 }
76 const __fp16* i8 = (const __fp16*) input[8];
77 assert(i8 != NULL);
78 if XNN_UNPREDICTABLE(i8 != (const __fp16*) zero) {
79 i8 = (const __fp16*) ((uintptr_t) i8 + input_offset);
80 }
81
82 input = (const void**) ((uintptr_t) input + input_stride);
83
84 size_t c = channels;
85 const __fp16* w = (const __fp16*) weights;
86 for (; c >= 32; c -= 32) {
87 float16x8_t vacc01234567p0 = vld1q_f16(w); w += 8;
88 float16x8_t vacc89ABCDEFp0 = vld1q_f16(w); w += 8;
89 float16x8_t vaccGHIJKLMNp0 = vld1q_f16(w); w += 8;
90 float16x8_t vaccOPQRSTUVp0 = vld1q_f16(w); w += 8;
91
92
93 const float16x8_t vi0x01234567 = vld1q_f16(i0); i0 += 8;
94 const float16x8_t vi0x89ABCDEF = vld1q_f16(i0); i0 += 8;
95 const float16x8_t vi0xGHIJKLMN = vld1q_f16(i0); i0 += 8;
96 const float16x8_t vi0xOPQRSTUV = vld1q_f16(i0); i0 += 8;
97 const float16x8_t vk0x01234567 = vld1q_f16(w); w += 8;
98 const float16x8_t vk0x89ABCDEF = vld1q_f16(w); w += 8;
99 const float16x8_t vk0xGHIJKLMN = vld1q_f16(w); w += 8;
100 const float16x8_t vk0xOPQRSTUV = vld1q_f16(w); w += 8;
101 vacc01234567p0 = vfmaq_f16(vacc01234567p0, vi0x01234567, vk0x01234567);
102 vacc89ABCDEFp0 = vfmaq_f16(vacc89ABCDEFp0, vi0x89ABCDEF, vk0x89ABCDEF);
103 vaccGHIJKLMNp0 = vfmaq_f16(vaccGHIJKLMNp0, vi0xGHIJKLMN, vk0xGHIJKLMN);
104 vaccOPQRSTUVp0 = vfmaq_f16(vaccOPQRSTUVp0, vi0xOPQRSTUV, vk0xOPQRSTUV);
105
106 const float16x8_t vi1x01234567 = vld1q_f16(i1); i1 += 8;
107 const float16x8_t vi1x89ABCDEF = vld1q_f16(i1); i1 += 8;
108 const float16x8_t vi1xGHIJKLMN = vld1q_f16(i1); i1 += 8;
109 const float16x8_t vi1xOPQRSTUV = vld1q_f16(i1); i1 += 8;
110 const float16x8_t vk1x01234567 = vld1q_f16(w); w += 8;
111 const float16x8_t vk1x89ABCDEF = vld1q_f16(w); w += 8;
112 const float16x8_t vk1xGHIJKLMN = vld1q_f16(w); w += 8;
113 const float16x8_t vk1xOPQRSTUV = vld1q_f16(w); w += 8;
114 float16x8_t vacc01234567p1 = vmulq_f16(vi1x01234567, vk1x01234567);
115 float16x8_t vacc89ABCDEFp1 = vmulq_f16(vi1x89ABCDEF, vk1x89ABCDEF);
116 float16x8_t vaccGHIJKLMNp1 = vmulq_f16(vi1xGHIJKLMN, vk1xGHIJKLMN);
117 float16x8_t vaccOPQRSTUVp1 = vmulq_f16(vi1xOPQRSTUV, vk1xOPQRSTUV);
118
119 const float16x8_t vi2x01234567 = vld1q_f16(i2); i2 += 8;
120 const float16x8_t vi2x89ABCDEF = vld1q_f16(i2); i2 += 8;
121 const float16x8_t vi2xGHIJKLMN = vld1q_f16(i2); i2 += 8;
122 const float16x8_t vi2xOPQRSTUV = vld1q_f16(i2); i2 += 8;
123 const float16x8_t vk2x01234567 = vld1q_f16(w); w += 8;
124 const float16x8_t vk2x89ABCDEF = vld1q_f16(w); w += 8;
125 const float16x8_t vk2xGHIJKLMN = vld1q_f16(w); w += 8;
126 const float16x8_t vk2xOPQRSTUV = vld1q_f16(w); w += 8;
127 vacc01234567p0 = vfmaq_f16(vacc01234567p0, vi2x01234567, vk2x01234567);
128 vacc89ABCDEFp0 = vfmaq_f16(vacc89ABCDEFp0, vi2x89ABCDEF, vk2x89ABCDEF);
129 vaccGHIJKLMNp0 = vfmaq_f16(vaccGHIJKLMNp0, vi2xGHIJKLMN, vk2xGHIJKLMN);
130 vaccOPQRSTUVp0 = vfmaq_f16(vaccOPQRSTUVp0, vi2xOPQRSTUV, vk2xOPQRSTUV);
131
132 const float16x8_t vi3x01234567 = vld1q_f16(i3); i3 += 8;
133 const float16x8_t vi3x89ABCDEF = vld1q_f16(i3); i3 += 8;
134 const float16x8_t vi3xGHIJKLMN = vld1q_f16(i3); i3 += 8;
135 const float16x8_t vi3xOPQRSTUV = vld1q_f16(i3); i3 += 8;
136 const float16x8_t vk3x01234567 = vld1q_f16(w); w += 8;
137 const float16x8_t vk3x89ABCDEF = vld1q_f16(w); w += 8;
138 const float16x8_t vk3xGHIJKLMN = vld1q_f16(w); w += 8;
139 const float16x8_t vk3xOPQRSTUV = vld1q_f16(w); w += 8;
140 vacc01234567p1 = vfmaq_f16(vacc01234567p1, vi3x01234567, vk3x01234567);
141 vacc89ABCDEFp1 = vfmaq_f16(vacc89ABCDEFp1, vi3x89ABCDEF, vk3x89ABCDEF);
142 vaccGHIJKLMNp1 = vfmaq_f16(vaccGHIJKLMNp1, vi3xGHIJKLMN, vk3xGHIJKLMN);
143 vaccOPQRSTUVp1 = vfmaq_f16(vaccOPQRSTUVp1, vi3xOPQRSTUV, vk3xOPQRSTUV);
144
145 const float16x8_t vi4x01234567 = vld1q_f16(i4); i4 += 8;
146 const float16x8_t vi4x89ABCDEF = vld1q_f16(i4); i4 += 8;
147 const float16x8_t vi4xGHIJKLMN = vld1q_f16(i4); i4 += 8;
148 const float16x8_t vi4xOPQRSTUV = vld1q_f16(i4); i4 += 8;
149 const float16x8_t vk4x01234567 = vld1q_f16(w); w += 8;
150 const float16x8_t vk4x89ABCDEF = vld1q_f16(w); w += 8;
151 const float16x8_t vk4xGHIJKLMN = vld1q_f16(w); w += 8;
152 const float16x8_t vk4xOPQRSTUV = vld1q_f16(w); w += 8;
153 vacc01234567p0 = vfmaq_f16(vacc01234567p0, vi4x01234567, vk4x01234567);
154 vacc89ABCDEFp0 = vfmaq_f16(vacc89ABCDEFp0, vi4x89ABCDEF, vk4x89ABCDEF);
155 vaccGHIJKLMNp0 = vfmaq_f16(vaccGHIJKLMNp0, vi4xGHIJKLMN, vk4xGHIJKLMN);
156 vaccOPQRSTUVp0 = vfmaq_f16(vaccOPQRSTUVp0, vi4xOPQRSTUV, vk4xOPQRSTUV);
157
158 const float16x8_t vi5x01234567 = vld1q_f16(i5); i5 += 8;
159 const float16x8_t vi5x89ABCDEF = vld1q_f16(i5); i5 += 8;
160 const float16x8_t vi5xGHIJKLMN = vld1q_f16(i5); i5 += 8;
161 const float16x8_t vi5xOPQRSTUV = vld1q_f16(i5); i5 += 8;
162 const float16x8_t vk5x01234567 = vld1q_f16(w); w += 8;
163 const float16x8_t vk5x89ABCDEF = vld1q_f16(w); w += 8;
164 const float16x8_t vk5xGHIJKLMN = vld1q_f16(w); w += 8;
165 const float16x8_t vk5xOPQRSTUV = vld1q_f16(w); w += 8;
166 vacc01234567p1 = vfmaq_f16(vacc01234567p1, vi5x01234567, vk5x01234567);
167 vacc89ABCDEFp1 = vfmaq_f16(vacc89ABCDEFp1, vi5x89ABCDEF, vk5x89ABCDEF);
168 vaccGHIJKLMNp1 = vfmaq_f16(vaccGHIJKLMNp1, vi5xGHIJKLMN, vk5xGHIJKLMN);
169 vaccOPQRSTUVp1 = vfmaq_f16(vaccOPQRSTUVp1, vi5xOPQRSTUV, vk5xOPQRSTUV);
170
171 const float16x8_t vi6x01234567 = vld1q_f16(i6); i6 += 8;
172 const float16x8_t vi6x89ABCDEF = vld1q_f16(i6); i6 += 8;
173 const float16x8_t vi6xGHIJKLMN = vld1q_f16(i6); i6 += 8;
174 const float16x8_t vi6xOPQRSTUV = vld1q_f16(i6); i6 += 8;
175 const float16x8_t vk6x01234567 = vld1q_f16(w); w += 8;
176 const float16x8_t vk6x89ABCDEF = vld1q_f16(w); w += 8;
177 const float16x8_t vk6xGHIJKLMN = vld1q_f16(w); w += 8;
178 const float16x8_t vk6xOPQRSTUV = vld1q_f16(w); w += 8;
179 vacc01234567p0 = vfmaq_f16(vacc01234567p0, vi6x01234567, vk6x01234567);
180 vacc89ABCDEFp0 = vfmaq_f16(vacc89ABCDEFp0, vi6x89ABCDEF, vk6x89ABCDEF);
181 vaccGHIJKLMNp0 = vfmaq_f16(vaccGHIJKLMNp0, vi6xGHIJKLMN, vk6xGHIJKLMN);
182 vaccOPQRSTUVp0 = vfmaq_f16(vaccOPQRSTUVp0, vi6xOPQRSTUV, vk6xOPQRSTUV);
183
184 const float16x8_t vi7x01234567 = vld1q_f16(i7); i7 += 8;
185 const float16x8_t vi7x89ABCDEF = vld1q_f16(i7); i7 += 8;
186 const float16x8_t vi7xGHIJKLMN = vld1q_f16(i7); i7 += 8;
187 const float16x8_t vi7xOPQRSTUV = vld1q_f16(i7); i7 += 8;
188 const float16x8_t vk7x01234567 = vld1q_f16(w); w += 8;
189 const float16x8_t vk7x89ABCDEF = vld1q_f16(w); w += 8;
190 const float16x8_t vk7xGHIJKLMN = vld1q_f16(w); w += 8;
191 const float16x8_t vk7xOPQRSTUV = vld1q_f16(w); w += 8;
192 vacc01234567p1 = vfmaq_f16(vacc01234567p1, vi7x01234567, vk7x01234567);
193 vacc89ABCDEFp1 = vfmaq_f16(vacc89ABCDEFp1, vi7x89ABCDEF, vk7x89ABCDEF);
194 vaccGHIJKLMNp1 = vfmaq_f16(vaccGHIJKLMNp1, vi7xGHIJKLMN, vk7xGHIJKLMN);
195 vaccOPQRSTUVp1 = vfmaq_f16(vaccOPQRSTUVp1, vi7xOPQRSTUV, vk7xOPQRSTUV);
196
197 const float16x8_t vi8x01234567 = vld1q_f16(i8); i8 += 8;
198 const float16x8_t vi8x89ABCDEF = vld1q_f16(i8); i8 += 8;
199 const float16x8_t vi8xGHIJKLMN = vld1q_f16(i8); i8 += 8;
200 const float16x8_t vi8xOPQRSTUV = vld1q_f16(i8); i8 += 8;
201 const float16x8_t vk8x01234567 = vld1q_f16(w); w += 8;
202 const float16x8_t vk8x89ABCDEF = vld1q_f16(w); w += 8;
203 const float16x8_t vk8xGHIJKLMN = vld1q_f16(w); w += 8;
204 const float16x8_t vk8xOPQRSTUV = vld1q_f16(w); w += 8;
205 vacc01234567p0 = vfmaq_f16(vacc01234567p0, vi8x01234567, vk8x01234567);
206 vacc89ABCDEFp0 = vfmaq_f16(vacc89ABCDEFp0, vi8x89ABCDEF, vk8x89ABCDEF);
207 vaccGHIJKLMNp0 = vfmaq_f16(vaccGHIJKLMNp0, vi8xGHIJKLMN, vk8xGHIJKLMN);
208 vaccOPQRSTUVp0 = vfmaq_f16(vaccOPQRSTUVp0, vi8xOPQRSTUV, vk8xOPQRSTUV);
209
210 // Add up all accumulators to vacc0123456789ABCDEFGHIJKLMNOPQRSTUVp0
211 vacc01234567p0 = vaddq_f16(vacc01234567p0, vacc01234567p1);
212 vacc89ABCDEFp0 = vaddq_f16(vacc89ABCDEFp0, vacc89ABCDEFp1);
213 vaccGHIJKLMNp0 = vaddq_f16(vaccGHIJKLMNp0, vaccGHIJKLMNp1);
214 vaccOPQRSTUVp0 = vaddq_f16(vaccOPQRSTUVp0, vaccOPQRSTUVp1);
215
216 float16x8_t vacc01234567 = vmaxq_f16(vacc01234567p0, vmin);
217 float16x8_t vacc89ABCDEF = vmaxq_f16(vacc89ABCDEFp0, vmin);
218 float16x8_t vaccGHIJKLMN = vmaxq_f16(vaccGHIJKLMNp0, vmin);
219 float16x8_t vaccOPQRSTUV = vmaxq_f16(vaccOPQRSTUVp0, vmin);
220 vacc01234567 = vminq_f16(vacc01234567, vmax);
221 vacc89ABCDEF = vminq_f16(vacc89ABCDEF, vmax);
222 vaccGHIJKLMN = vminq_f16(vaccGHIJKLMN, vmax);
223 vaccOPQRSTUV = vminq_f16(vaccOPQRSTUV, vmax);
224
225 vst1q_f16(output, vacc01234567); output += 8;
226 vst1q_f16(output, vacc89ABCDEF); output += 8;
227 vst1q_f16(output, vaccGHIJKLMN); output += 8;
228 vst1q_f16(output, vaccOPQRSTUV); output += 8;
229 }
230 for (; c >= 8; c -= 8) {
231 float16x8_t vacc01234567p0 = vld1q_f16(w); w += 8;
232
233
234 const float16x8_t vi0x01234567 = vld1q_f16(i0); i0 += 8;
235 const float16x8_t vk0x01234567 = vld1q_f16(w + 24);
236 vacc01234567p0 = vfmaq_f16(vacc01234567p0, vi0x01234567, vk0x01234567);
237
238 const float16x8_t vi1x01234567 = vld1q_f16(i1); i1 += 8;
239 const float16x8_t vk1x01234567 = vld1q_f16(w + 56);
240 float16x8_t vacc01234567p1 = vmulq_f16(vi1x01234567, vk1x01234567);
241
242 const float16x8_t vi2x01234567 = vld1q_f16(i2); i2 += 8;
243 const float16x8_t vk2x01234567 = vld1q_f16(w + 88);
244 vacc01234567p0 = vfmaq_f16(vacc01234567p0, vi2x01234567, vk2x01234567);
245
246 const float16x8_t vi3x01234567 = vld1q_f16(i3); i3 += 8;
247 const float16x8_t vk3x01234567 = vld1q_f16(w + 120);
248 vacc01234567p1 = vfmaq_f16(vacc01234567p1, vi3x01234567, vk3x01234567);
249
250 const float16x8_t vi4x01234567 = vld1q_f16(i4); i4 += 8;
251 const float16x8_t vk4x01234567 = vld1q_f16(w + 152);
252 vacc01234567p0 = vfmaq_f16(vacc01234567p0, vi4x01234567, vk4x01234567);
253
254 const float16x8_t vi5x01234567 = vld1q_f16(i5); i5 += 8;
255 const float16x8_t vk5x01234567 = vld1q_f16(w + 184);
256 vacc01234567p1 = vfmaq_f16(vacc01234567p1, vi5x01234567, vk5x01234567);
257
258 const float16x8_t vi6x01234567 = vld1q_f16(i6); i6 += 8;
259 const float16x8_t vk6x01234567 = vld1q_f16(w + 216);
260 vacc01234567p0 = vfmaq_f16(vacc01234567p0, vi6x01234567, vk6x01234567);
261
262 const float16x8_t vi7x01234567 = vld1q_f16(i7); i7 += 8;
263 const float16x8_t vk7x01234567 = vld1q_f16(w + 248);
264 vacc01234567p1 = vfmaq_f16(vacc01234567p1, vi7x01234567, vk7x01234567);
265
266 const float16x8_t vi8x01234567 = vld1q_f16(i8); i8 += 8;
267 const float16x8_t vk8x01234567 = vld1q_f16(w + 280);
268 vacc01234567p0 = vfmaq_f16(vacc01234567p0, vi8x01234567, vk8x01234567);
269
270 // Add up all accumulators to vacc01234567p0
271 vacc01234567p0 = vaddq_f16(vacc01234567p0, vacc01234567p1);
272
273 float16x8_t vacc01234567 = vmaxq_f16(vacc01234567p0, vmin);
274 vacc01234567 = vminq_f16(vacc01234567, vmax);
275
276 vst1q_f16(output, vacc01234567); output += 8;
277 }
278 if XNN_UNLIKELY(c != 0) {
279 float16x8_t vacc01234567p0 = vld1q_f16(w);
280
281
282 const float16x8_t vi0x01234567 = vld1q_f16(i0);
283 const float16x8_t vk0x01234567 = vld1q_f16(w + 32);
284 vacc01234567p0 = vfmaq_f16(vacc01234567p0, vi0x01234567, vk0x01234567);
285
286 const float16x8_t vi1x01234567 = vld1q_f16(i1);
287 const float16x8_t vk1x01234567 = vld1q_f16(w + 64);
288 float16x8_t vacc01234567p1 = vmulq_f16(vi1x01234567, vk1x01234567);
289
290 const float16x8_t vi2x01234567 = vld1q_f16(i2);
291 const float16x8_t vk2x01234567 = vld1q_f16(w + 96);
292 vacc01234567p0 = vfmaq_f16(vacc01234567p0, vi2x01234567, vk2x01234567);
293
294 const float16x8_t vi3x01234567 = vld1q_f16(i3);
295 const float16x8_t vk3x01234567 = vld1q_f16(w + 128);
296 vacc01234567p1 = vfmaq_f16(vacc01234567p1, vi3x01234567, vk3x01234567);
297
298 const float16x8_t vi4x01234567 = vld1q_f16(i4);
299 const float16x8_t vk4x01234567 = vld1q_f16(w + 160);
300 vacc01234567p0 = vfmaq_f16(vacc01234567p0, vi4x01234567, vk4x01234567);
301
302 const float16x8_t vi5x01234567 = vld1q_f16(i5);
303 const float16x8_t vk5x01234567 = vld1q_f16(w + 192);
304 vacc01234567p1 = vfmaq_f16(vacc01234567p1, vi5x01234567, vk5x01234567);
305
306 const float16x8_t vi6x01234567 = vld1q_f16(i6);
307 const float16x8_t vk6x01234567 = vld1q_f16(w + 224);
308 vacc01234567p0 = vfmaq_f16(vacc01234567p0, vi6x01234567, vk6x01234567);
309
310 const float16x8_t vi7x01234567 = vld1q_f16(i7);
311 const float16x8_t vk7x01234567 = vld1q_f16(w + 256);
312 vacc01234567p1 = vfmaq_f16(vacc01234567p1, vi7x01234567, vk7x01234567);
313
314 const float16x8_t vi8x01234567 = vld1q_f16(i8);
315 const float16x8_t vk8x01234567 = vld1q_f16(w + 288);
316 vacc01234567p0 = vfmaq_f16(vacc01234567p0, vi8x01234567, vk8x01234567);
317
318 // Add up all accumulators to vacc01234567p0
319 vacc01234567p0 = vaddq_f16(vacc01234567p0, vacc01234567p1);
320
321 float16x8_t vacc01234567 = vmaxq_f16(vacc01234567p0, vmin);
322 vacc01234567 = vminq_f16(vacc01234567, vmax);
323
324 float16x4_t vacc0123 = vget_low_f16(vacc01234567);
325 if (c & 4) {
326 vst1_f16(output, vacc0123); output += 4;
327 vacc0123 = vget_high_f16(vacc01234567);
328 }
329 if (c & 2) {
330 vst1_lane_u32((void*) output, vreinterpret_u32_f16(vacc0123), 0); output += 2;
331 vacc0123 = vext_f16(vacc0123, vacc0123, 2);
332 }
333 if (c & 1) {
334 vst1_lane_f16(output, vacc0123, 0); output += 1;
335 }
336 }
337
338 output = (__fp16*) ((uintptr_t) output + output_increment);
339 } while (--output_width != 0);
340 }
341