xref: /aosp_15_r20/external/XNNPACK/src/qs8-dwconv/gen/up16x9-minmax-fp32-neon-mul16.c (revision 4bdc94577ba0e567308109d787f7fec7b531ce36) 
1 // Auto-generated file. Do not edit!
2 //   Template: src/qs8-dwconv/unipass-neon-mul16.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_qs8_dwconv_minmax_fp32_ukernel_up16x9__neon_mul16(size_t channels,size_t output_width,const int8_t ** input,const void * weights,int8_t * output,size_t input_stride,size_t output_increment,size_t input_offset,const int8_t * zero,const union xnn_qs8_conv_minmax_params params[restrict XNN_MIN_ELEMENTS (1)])17 void xnn_qs8_dwconv_minmax_fp32_ukernel_up16x9__neon_mul16(
18     size_t channels,
19     size_t output_width,
20     const int8_t** input,
21     const void* weights,
22     int8_t* output,
23     size_t input_stride,
24     size_t output_increment,
25     size_t input_offset,
26     const int8_t* zero,
27     const union xnn_qs8_conv_minmax_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_OOB_READS
28 {
29   assert(channels != 0);
30   assert(output_width != 0);
31 
32   const float32x4_t vscale = vld1q_dup_f32(&params->fp32_neon.scale);
33   const float32x4_t vmagic_bias = vld1q_dup_f32(&params->fp32_neon.magic_bias);
34   const int32x4_t vmagic_bias_less_output_zero_point = vld1q_dup_s32(&params->fp32_neon.magic_bias_less_output_zero_point);
35   const int8x16_t voutput_min = vld1q_dup_s8(&params->fp32_neon.output_min);
36   const int8x16_t voutput_max = vld1q_dup_s8(&params->fp32_neon.output_max);
37   do {
38     const int8_t* i0 = input[0];
39     assert(i0 != NULL);
40     if XNN_UNPREDICTABLE(i0 != zero) {
41       i0 = (const int8_t*) ((uintptr_t) i0 + input_offset);
42     }
43     const int8_t* i1 = input[1];
44     assert(i1 != NULL);
45     if XNN_UNPREDICTABLE(i1 != zero) {
46       i1 = (const int8_t*) ((uintptr_t) i1 + input_offset);
47     }
48     const int8_t* i2 = input[2];
49     assert(i2 != NULL);
50     if XNN_UNPREDICTABLE(i2 != zero) {
51       i2 = (const int8_t*) ((uintptr_t) i2 + input_offset);
52     }
53     const int8_t* i3 = input[3];
54     assert(i3 != NULL);
55     if XNN_UNPREDICTABLE(i3 != zero) {
56       i3 = (const int8_t*) ((uintptr_t) i3 + input_offset);
57     }
58     const int8_t* i4 = input[4];
59     assert(i4 != NULL);
60     if XNN_UNPREDICTABLE(i4 != zero) {
61       i4 = (const int8_t*) ((uintptr_t) i4 + input_offset);
62     }
63     const int8_t* i5 = input[5];
64     assert(i5 != NULL);
65     if XNN_UNPREDICTABLE(i5 != zero) {
66       i5 = (const int8_t*) ((uintptr_t) i5 + input_offset);
67     }
68     const int8_t* i6 = input[6];
69     assert(i6 != NULL);
70     if XNN_UNPREDICTABLE(i6 != zero) {
71       i6 = (const int8_t*) ((uintptr_t) i6 + input_offset);
72     }
73     const int8_t* i7 = input[7];
74     assert(i7 != NULL);
75     if XNN_UNPREDICTABLE(i7 != zero) {
76       i7 = (const int8_t*) ((uintptr_t) i7 + input_offset);
77     }
78     const int8_t* i8 = input[8];
79     assert(i8 != NULL);
80     if XNN_UNPREDICTABLE(i8 != zero) {
81       i8 = (const int8_t*) ((uintptr_t) i8 + input_offset);
82     }
83     input = (const int8_t**) ((uintptr_t) input + input_stride);
84 
85     size_t c = channels;
86     const void* w = weights;
87     for (; c >= 16; c -= 16) {
88       int32x4_t vacc0123 = vld1q_s32(w); w = (const void*) ((const int32_t*) w + 4);
89       int32x4_t vacc4567 = vld1q_s32(w); w = (const void*) ((const int32_t*) w + 4);
90       int32x4_t vacc89AB = vld1q_s32(w); w = (const void*) ((const int32_t*) w + 4);
91       int32x4_t vaccCDEF = vld1q_s32(w); w = (const void*) ((const int32_t*) w + 4);
92 
93 
94       const int16x8_t vi0x01234567 = vmovl_s8(vld1_s8(i0)); i0 += 8;
95       const int16x8_t vk0x01234567 = vmovl_s8(vld1_s8(w)); w = (const void*) ((const int8_t*) w + 8);
96       const int16x8_t vi0x89ABCDEF = vmovl_s8(vld1_s8(i0)); i0 += 8;
97       const int16x8_t vk0x89ABCDEF = vmovl_s8(vld1_s8(w)); w = (const void*) ((const int8_t*) w + 8);
98 
99       vacc0123 = vmlal_s16(vacc0123, vget_low_s16(vi0x01234567), vget_low_s16(vk0x01234567));
100       vacc4567 = vmlal_s16(vacc4567, vget_high_s16(vi0x01234567), vget_high_s16(vk0x01234567));
101       vacc89AB = vmlal_s16(vacc89AB, vget_low_s16(vi0x89ABCDEF), vget_low_s16(vk0x89ABCDEF));
102       vaccCDEF = vmlal_s16(vaccCDEF, vget_high_s16(vi0x89ABCDEF), vget_high_s16(vk0x89ABCDEF));
103 
104       const int16x8_t vi1x01234567 = vmovl_s8(vld1_s8(i1)); i1 += 8;
105       const int16x8_t vk1x01234567 = vmovl_s8(vld1_s8(w)); w = (const void*) ((const int8_t*) w + 8);
106       const int16x8_t vi1x89ABCDEF = vmovl_s8(vld1_s8(i1)); i1 += 8;
107       const int16x8_t vk1x89ABCDEF = vmovl_s8(vld1_s8(w)); w = (const void*) ((const int8_t*) w + 8);
108 
109       vacc0123 = vmlal_s16(vacc0123, vget_low_s16(vi1x01234567), vget_low_s16(vk1x01234567));
110       vacc4567 = vmlal_s16(vacc4567, vget_high_s16(vi1x01234567), vget_high_s16(vk1x01234567));
111       vacc89AB = vmlal_s16(vacc89AB, vget_low_s16(vi1x89ABCDEF), vget_low_s16(vk1x89ABCDEF));
112       vaccCDEF = vmlal_s16(vaccCDEF, vget_high_s16(vi1x89ABCDEF), vget_high_s16(vk1x89ABCDEF));
113 
114       const int16x8_t vi2x01234567 = vmovl_s8(vld1_s8(i2)); i2 += 8;
115       const int16x8_t vk2x01234567 = vmovl_s8(vld1_s8(w)); w = (const void*) ((const int8_t*) w + 8);
116       const int16x8_t vi2x89ABCDEF = vmovl_s8(vld1_s8(i2)); i2 += 8;
117       const int16x8_t vk2x89ABCDEF = vmovl_s8(vld1_s8(w)); w = (const void*) ((const int8_t*) w + 8);
118 
119       vacc0123 = vmlal_s16(vacc0123, vget_low_s16(vi2x01234567), vget_low_s16(vk2x01234567));
120       vacc4567 = vmlal_s16(vacc4567, vget_high_s16(vi2x01234567), vget_high_s16(vk2x01234567));
121       vacc89AB = vmlal_s16(vacc89AB, vget_low_s16(vi2x89ABCDEF), vget_low_s16(vk2x89ABCDEF));
122       vaccCDEF = vmlal_s16(vaccCDEF, vget_high_s16(vi2x89ABCDEF), vget_high_s16(vk2x89ABCDEF));
123 
124       const int16x8_t vi3x01234567 = vmovl_s8(vld1_s8(i3)); i3 += 8;
125       const int16x8_t vk3x01234567 = vmovl_s8(vld1_s8(w)); w = (const void*) ((const int8_t*) w + 8);
126       const int16x8_t vi3x89ABCDEF = vmovl_s8(vld1_s8(i3)); i3 += 8;
127       const int16x8_t vk3x89ABCDEF = vmovl_s8(vld1_s8(w)); w = (const void*) ((const int8_t*) w + 8);
128 
129       vacc0123 = vmlal_s16(vacc0123, vget_low_s16(vi3x01234567), vget_low_s16(vk3x01234567));
130       vacc4567 = vmlal_s16(vacc4567, vget_high_s16(vi3x01234567), vget_high_s16(vk3x01234567));
131       vacc89AB = vmlal_s16(vacc89AB, vget_low_s16(vi3x89ABCDEF), vget_low_s16(vk3x89ABCDEF));
132       vaccCDEF = vmlal_s16(vaccCDEF, vget_high_s16(vi3x89ABCDEF), vget_high_s16(vk3x89ABCDEF));
133 
134       const int16x8_t vi4x01234567 = vmovl_s8(vld1_s8(i4)); i4 += 8;
135       const int16x8_t vk4x01234567 = vmovl_s8(vld1_s8(w)); w = (const void*) ((const int8_t*) w + 8);
136       const int16x8_t vi4x89ABCDEF = vmovl_s8(vld1_s8(i4)); i4 += 8;
137       const int16x8_t vk4x89ABCDEF = vmovl_s8(vld1_s8(w)); w = (const void*) ((const int8_t*) w + 8);
138 
139       vacc0123 = vmlal_s16(vacc0123, vget_low_s16(vi4x01234567), vget_low_s16(vk4x01234567));
140       vacc4567 = vmlal_s16(vacc4567, vget_high_s16(vi4x01234567), vget_high_s16(vk4x01234567));
141       vacc89AB = vmlal_s16(vacc89AB, vget_low_s16(vi4x89ABCDEF), vget_low_s16(vk4x89ABCDEF));
142       vaccCDEF = vmlal_s16(vaccCDEF, vget_high_s16(vi4x89ABCDEF), vget_high_s16(vk4x89ABCDEF));
143 
144       const int16x8_t vi5x01234567 = vmovl_s8(vld1_s8(i5)); i5 += 8;
145       const int16x8_t vk5x01234567 = vmovl_s8(vld1_s8(w)); w = (const void*) ((const int8_t*) w + 8);
146       const int16x8_t vi5x89ABCDEF = vmovl_s8(vld1_s8(i5)); i5 += 8;
147       const int16x8_t vk5x89ABCDEF = vmovl_s8(vld1_s8(w)); w = (const void*) ((const int8_t*) w + 8);
148 
149       vacc0123 = vmlal_s16(vacc0123, vget_low_s16(vi5x01234567), vget_low_s16(vk5x01234567));
150       vacc4567 = vmlal_s16(vacc4567, vget_high_s16(vi5x01234567), vget_high_s16(vk5x01234567));
151       vacc89AB = vmlal_s16(vacc89AB, vget_low_s16(vi5x89ABCDEF), vget_low_s16(vk5x89ABCDEF));
152       vaccCDEF = vmlal_s16(vaccCDEF, vget_high_s16(vi5x89ABCDEF), vget_high_s16(vk5x89ABCDEF));
153 
154       const int16x8_t vi6x01234567 = vmovl_s8(vld1_s8(i6)); i6 += 8;
155       const int16x8_t vk6x01234567 = vmovl_s8(vld1_s8(w)); w = (const void*) ((const int8_t*) w + 8);
156       const int16x8_t vi6x89ABCDEF = vmovl_s8(vld1_s8(i6)); i6 += 8;
157       const int16x8_t vk6x89ABCDEF = vmovl_s8(vld1_s8(w)); w = (const void*) ((const int8_t*) w + 8);
158 
159       vacc0123 = vmlal_s16(vacc0123, vget_low_s16(vi6x01234567), vget_low_s16(vk6x01234567));
160       vacc4567 = vmlal_s16(vacc4567, vget_high_s16(vi6x01234567), vget_high_s16(vk6x01234567));
161       vacc89AB = vmlal_s16(vacc89AB, vget_low_s16(vi6x89ABCDEF), vget_low_s16(vk6x89ABCDEF));
162       vaccCDEF = vmlal_s16(vaccCDEF, vget_high_s16(vi6x89ABCDEF), vget_high_s16(vk6x89ABCDEF));
163 
164       const int16x8_t vi7x01234567 = vmovl_s8(vld1_s8(i7)); i7 += 8;
165       const int16x8_t vk7x01234567 = vmovl_s8(vld1_s8(w)); w = (const void*) ((const int8_t*) w + 8);
166       const int16x8_t vi7x89ABCDEF = vmovl_s8(vld1_s8(i7)); i7 += 8;
167       const int16x8_t vk7x89ABCDEF = vmovl_s8(vld1_s8(w)); w = (const void*) ((const int8_t*) w + 8);
168 
169       vacc0123 = vmlal_s16(vacc0123, vget_low_s16(vi7x01234567), vget_low_s16(vk7x01234567));
170       vacc4567 = vmlal_s16(vacc4567, vget_high_s16(vi7x01234567), vget_high_s16(vk7x01234567));
171       vacc89AB = vmlal_s16(vacc89AB, vget_low_s16(vi7x89ABCDEF), vget_low_s16(vk7x89ABCDEF));
172       vaccCDEF = vmlal_s16(vaccCDEF, vget_high_s16(vi7x89ABCDEF), vget_high_s16(vk7x89ABCDEF));
173 
174       const int16x8_t vi8x01234567 = vmovl_s8(vld1_s8(i8)); i8 += 8;
175       const int16x8_t vk8x01234567 = vmovl_s8(vld1_s8(w)); w = (const void*) ((const int8_t*) w + 8);
176       const int16x8_t vi8x89ABCDEF = vmovl_s8(vld1_s8(i8)); i8 += 8;
177       const int16x8_t vk8x89ABCDEF = vmovl_s8(vld1_s8(w)); w = (const void*) ((const int8_t*) w + 8);
178 
179       vacc0123 = vmlal_s16(vacc0123, vget_low_s16(vi8x01234567), vget_low_s16(vk8x01234567));
180       vacc4567 = vmlal_s16(vacc4567, vget_high_s16(vi8x01234567), vget_high_s16(vk8x01234567));
181       vacc89AB = vmlal_s16(vacc89AB, vget_low_s16(vi8x89ABCDEF), vget_low_s16(vk8x89ABCDEF));
182       vaccCDEF = vmlal_s16(vaccCDEF, vget_high_s16(vi8x89ABCDEF), vget_high_s16(vk8x89ABCDEF));
183 
184       float32x4_t vfpacc0123 = vcvtq_f32_s32(vacc0123);
185       float32x4_t vfpacc4567 = vcvtq_f32_s32(vacc4567);
186       float32x4_t vfpacc89AB = vcvtq_f32_s32(vacc89AB);
187       float32x4_t vfpaccCDEF = vcvtq_f32_s32(vaccCDEF);
188 
189       vfpacc0123 = vmulq_f32(vfpacc0123, vscale);
190       vfpacc4567 = vmulq_f32(vfpacc4567, vscale);
191       vfpacc89AB = vmulq_f32(vfpacc89AB, vscale);
192       vfpaccCDEF = vmulq_f32(vfpaccCDEF, vscale);
193 
194       vacc0123 = vreinterpretq_s32_f32(vaddq_f32(vfpacc0123, vmagic_bias));
195       vacc4567 = vreinterpretq_s32_f32(vaddq_f32(vfpacc4567, vmagic_bias));
196       vacc89AB = vreinterpretq_s32_f32(vaddq_f32(vfpacc89AB, vmagic_bias));
197       vaccCDEF = vreinterpretq_s32_f32(vaddq_f32(vfpaccCDEF, vmagic_bias));
198 
199       vacc0123 = vqsubq_s32(vacc0123, vmagic_bias_less_output_zero_point);
200       vacc4567 = vqsubq_s32(vacc4567, vmagic_bias_less_output_zero_point);
201       vacc89AB = vqsubq_s32(vacc89AB, vmagic_bias_less_output_zero_point);
202       vaccCDEF = vqsubq_s32(vaccCDEF, vmagic_bias_less_output_zero_point);
203 
204 #if XNN_ARCH_ARM64
205       int16x8_t vacc01234567 = vqmovn_high_s32(vqmovn_s32(vacc0123), vacc4567);
206       int16x8_t vacc89ABCDEF = vqmovn_high_s32(vqmovn_s32(vacc89AB), vaccCDEF);
207 
208 
209       int8x16_t vout0123456789ABCDEF = vqmovn_high_s16(vqmovn_s16(vacc01234567), vacc89ABCDEF);
210 #else  // !XNN_ARCH_ARM64
211       int16x8_t vacc01234567 = vcombine_s16(vqmovn_s32(vacc0123), vqmovn_s32(vacc4567));
212       int16x8_t vacc89ABCDEF = vcombine_s16(vqmovn_s32(vacc89AB), vqmovn_s32(vaccCDEF));
213 
214 
215       int8x16_t vout0123456789ABCDEF = vcombine_s8(vqmovn_s16(vacc01234567), vqmovn_s16(vacc89ABCDEF));
216 #endif  // !XNN_ARCH_ARM64
217 
218       vout0123456789ABCDEF = vmaxq_s8(vout0123456789ABCDEF, voutput_min);
219 
220       vout0123456789ABCDEF = vminq_s8(vout0123456789ABCDEF, voutput_max);
221 
222       vst1q_s8(output, vout0123456789ABCDEF); output += 16;
223     }
224     if XNN_UNLIKELY(c != 0) {
225       const int8_t* k = (const int8_t*) ((const int32_t*) w + 16);
226       do {
227         int32x4_t vacc0123 = vld1q_s32(w); w = (const void*) ((const int32_t*) w + 4);
228         int32x4_t vacc4567 = vld1q_s32(w); w = (const void*) ((const int32_t*) w + 4);
229 
230         const int16x8_t vi0x01234567 = vmovl_s8(vld1_s8(i0)); i0 += 8;
231         const int16x8_t vk0x01234567 = vmovl_s8(vld1_s8(k)); k += 8;
232 
233         vacc0123 = vmlal_s16(vacc0123, vget_low_s16(vi0x01234567), vget_low_s16(vk0x01234567));
234         vacc4567 = vmlal_s16(vacc4567, vget_high_s16(vi0x01234567), vget_high_s16(vk0x01234567));
235         const int16x8_t vi1x01234567 = vmovl_s8(vld1_s8(i1)); i1 += 8;
236         const int16x8_t vk1x01234567 = vmovl_s8(vld1_s8((const void*) (k + 8)));
237 
238         vacc0123 = vmlal_s16(vacc0123, vget_low_s16(vi1x01234567), vget_low_s16(vk1x01234567));
239         vacc4567 = vmlal_s16(vacc4567, vget_high_s16(vi1x01234567), vget_high_s16(vk1x01234567));
240         const int16x8_t vi2x01234567 = vmovl_s8(vld1_s8(i2)); i2 += 8;
241         const int16x8_t vk2x01234567 = vmovl_s8(vld1_s8((const void*) (k + 24)));
242 
243         vacc0123 = vmlal_s16(vacc0123, vget_low_s16(vi2x01234567), vget_low_s16(vk2x01234567));
244         vacc4567 = vmlal_s16(vacc4567, vget_high_s16(vi2x01234567), vget_high_s16(vk2x01234567));
245         const int16x8_t vi3x01234567 = vmovl_s8(vld1_s8(i3)); i3 += 8;
246         const int16x8_t vk3x01234567 = vmovl_s8(vld1_s8((const void*) (k + 40)));
247 
248         vacc0123 = vmlal_s16(vacc0123, vget_low_s16(vi3x01234567), vget_low_s16(vk3x01234567));
249         vacc4567 = vmlal_s16(vacc4567, vget_high_s16(vi3x01234567), vget_high_s16(vk3x01234567));
250         const int16x8_t vi4x01234567 = vmovl_s8(vld1_s8(i4)); i4 += 8;
251         const int16x8_t vk4x01234567 = vmovl_s8(vld1_s8((const void*) (k + 56)));
252 
253         vacc0123 = vmlal_s16(vacc0123, vget_low_s16(vi4x01234567), vget_low_s16(vk4x01234567));
254         vacc4567 = vmlal_s16(vacc4567, vget_high_s16(vi4x01234567), vget_high_s16(vk4x01234567));
255         const int16x8_t vi5x01234567 = vmovl_s8(vld1_s8(i5)); i5 += 8;
256         const int16x8_t vk5x01234567 = vmovl_s8(vld1_s8((const void*) (k + 72)));
257 
258         vacc0123 = vmlal_s16(vacc0123, vget_low_s16(vi5x01234567), vget_low_s16(vk5x01234567));
259         vacc4567 = vmlal_s16(vacc4567, vget_high_s16(vi5x01234567), vget_high_s16(vk5x01234567));
260         const int16x8_t vi6x01234567 = vmovl_s8(vld1_s8(i6)); i6 += 8;
261         const int16x8_t vk6x01234567 = vmovl_s8(vld1_s8((const void*) (k + 88)));
262 
263         vacc0123 = vmlal_s16(vacc0123, vget_low_s16(vi6x01234567), vget_low_s16(vk6x01234567));
264         vacc4567 = vmlal_s16(vacc4567, vget_high_s16(vi6x01234567), vget_high_s16(vk6x01234567));
265         const int16x8_t vi7x01234567 = vmovl_s8(vld1_s8(i7)); i7 += 8;
266         const int16x8_t vk7x01234567 = vmovl_s8(vld1_s8((const void*) (k + 104)));
267 
268         vacc0123 = vmlal_s16(vacc0123, vget_low_s16(vi7x01234567), vget_low_s16(vk7x01234567));
269         vacc4567 = vmlal_s16(vacc4567, vget_high_s16(vi7x01234567), vget_high_s16(vk7x01234567));
270         const int16x8_t vi8x01234567 = vmovl_s8(vld1_s8(i8)); i8 += 8;
271         const int16x8_t vk8x01234567 = vmovl_s8(vld1_s8((const void*) (k + 120)));
272 
273         vacc0123 = vmlal_s16(vacc0123, vget_low_s16(vi8x01234567), vget_low_s16(vk8x01234567));
274         vacc4567 = vmlal_s16(vacc4567, vget_high_s16(vi8x01234567), vget_high_s16(vk8x01234567));
275 
276         float32x4_t vfpacc0123 = vcvtq_f32_s32(vacc0123);
277         float32x4_t vfpacc4567 = vcvtq_f32_s32(vacc4567);
278 
279         vfpacc0123 = vmulq_f32(vfpacc0123, vscale);
280         vfpacc4567 = vmulq_f32(vfpacc4567, vscale);
281 
282         vacc0123 = vreinterpretq_s32_f32(vaddq_f32(vfpacc0123, vmagic_bias));
283         vacc4567 = vreinterpretq_s32_f32(vaddq_f32(vfpacc4567, vmagic_bias));
284 
285         vacc0123 = vqsubq_s32(vacc0123, vmagic_bias_less_output_zero_point);
286         vacc4567 = vqsubq_s32(vacc4567, vmagic_bias_less_output_zero_point);
287 
288 #if XNN_ARCH_ARM64
289         int16x8_t vacc01234567 = vqmovn_high_s32(vqmovn_s32(vacc0123), vacc4567);
290 #else
291         int16x8_t vacc01234567 = vcombine_s16(vqmovn_s32(vacc0123), vqmovn_s32(vacc4567));
292 #endif
293 
294         int8x8_t vout01234567 = vqmovn_s16(vacc01234567);
295         vout01234567 = vmax_s8(vout01234567, vget_low_s8(voutput_min));
296         vout01234567 = vmin_s8(vout01234567, vget_low_s8(voutput_max));
297 
298         if XNN_LIKELY(c >= 8) {
299           vst1_s8(output, vout01234567); output += 8;
300           c -= 8;
301         } else {
302           if (c & 4) {
303             vst1_lane_u32((void*) output, vreinterpret_u32_s8(vout01234567), 0); output += 4;
304             vout01234567 = vext_s8(vout01234567, vout01234567, 4);
305           }
306           if (c & 2) {
307             vst1_lane_u16((void*) output, vreinterpret_u16_s8(vout01234567), 0); output += 2;
308             vout01234567 = vext_s8(vout01234567, vout01234567, 2);
309           }
310           if (c & 1) {
311             vst1_lane_s8(output, vout01234567, 0); output += 1;
312           }
313           c = 0;
314         }
315       } while (c != 0);
316     }
317 
318     output = (int8_t*) ((uintptr_t) output + output_increment);
319   } while (--output_width != 0);
320 }
321