Rockbox open source high quality audio player as a Music Player Daemon
mpris
rockbox
mpd
libadwaita
audio
rust
zig
deno
ARMv6 vector mutiplication asm, speeds up vorbis decoding about 0.1MHz on gigabeat S.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26892 a1c6a512-1295-4272-9138-f99709370657
+50
+50
apps/codecs/libtremor/asm_arm.h
+50
apps/codecs/libtremor/asm_arm.h
···
112
112
} while (n);
113
113
}
114
114
115
+
#if ARM_ARCH >= 6
116
+
static inline
117
+
void vect_mult_fw(ogg_int32_t *data, LOOKUP_T *window, int n)
118
+
{
119
+
/* Note, mult_fw uses MULT31 */
120
+
do{
121
+
asm volatile (
122
+
"ldmia %[d], {r0, r1, r2, r3};"
123
+
"ldmia %[w]!, {r4, r5, r6, r7};"
124
+
"smmul r0, r4, r0;"
125
+
"smmul r1, r5, r1;"
126
+
"smmul r2, r6, r2;"
127
+
"smmul r3, r7, r3;"
128
+
"mov r0, r0, lsl #1;"
129
+
"mov r1, r1, lsl #1;"
130
+
"mov r2, r2, lsl #1;"
131
+
"mov r3, r3, lsl #1;"
132
+
"stmia %[d]!, {r0, r1, r2, r3};"
133
+
: [d] "+r" (data), [w] "+r" (window)
134
+
: : "r0", "r1", "r2", "r3",
135
+
"r4", "r5", "r6", "r7",
136
+
"memory" );
137
+
n -= 4;
138
+
} while (n);
139
+
}
140
+
#else
115
141
static inline
116
142
void vect_mult_fw(ogg_int32_t *data, LOOKUP_T *window, int n)
117
143
{
···
136
162
n -= 4;
137
163
} while (n);
138
164
}
165
+
#endif
139
166
167
+
#if ARM_ARCH >= 6
168
+
static inline
169
+
void vect_mult_bw(ogg_int32_t *data, LOOKUP_T *window, int n)
170
+
{
171
+
/* NOTE mult_bw uses MULT_32 i.e. doesn't shift result left at end */
172
+
/* On ARM, we can do the shift at the same time as the overlap-add */
173
+
do{
174
+
asm volatile ("ldmia %[d], {r0, r1, r2, r3};"
175
+
"ldmda %[w]!, {r4, r5, r6, r7};"
176
+
"smmul r0, r7, r0;"
177
+
"smmul r1, r6, r1;"
178
+
"smmul r2, r5, r2;"
179
+
"smmul r3, r4, r3;"
180
+
"stmia %[d]!, {r0, r1, r2, r3};"
181
+
: [d] "+r" (data), [w] "+r" (window)
182
+
: : "r0", "r1", "r2", "r3",
183
+
"r4", "r5", "r6", "r7",
184
+
"memory" );
185
+
n -= 4;
186
+
} while (n);
187
+
}
188
+
#else
140
189
static inline
141
190
void vect_mult_bw(ogg_int32_t *data, LOOKUP_T *window, int n)
142
191
{
···
157
206
n -= 4;
158
207
} while (n);
159
208
}
209
+
#endif
160
210
161
211
static inline void vect_copy(ogg_int32_t *x, const ogg_int32_t *y, int n)
162
212
{