]>
git.gir.st - tmk_keyboard.git/blob - tmk_core/tool/mbed/mbed-sdk/libraries/dsp/cmsis_dsp/SupportFunctions/arm_fill_q15.c
1 /* ----------------------------------------------------------------------
2 * Copyright (C) 2010-2013 ARM Limited. All rights reserved.
4 * $Date: 17. January 2013
7 * Project: CMSIS DSP Library
8 * Title: arm_fill_q15.c
10 * Description: Fills a constant value into a Q15 vector.
12 * Target Processor: Cortex-M4/Cortex-M3/Cortex-M0
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
17 * - Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 * - Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in
21 * the documentation and/or other materials provided with the
23 * - Neither the name of ARM LIMITED nor the names of its contributors
24 * may be used to endorse or promote products derived from this
25 * software without specific prior written permission.
27 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
28 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
29 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
30 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
31 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
32 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
33 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
34 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
35 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
37 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
38 * POSSIBILITY OF SUCH DAMAGE.
39 * -------------------------------------------------------------------- */
44 * @ingroup groupSupport
53 * @brief Fills a constant value into a Q15 vector.
54 * @param[in] value input value to be filled
55 * @param[out] *pDst points to output vector
56 * @param[in] blockSize length of the output vector
66 uint32_t blkCnt
; /* loop counter */
68 #ifndef ARM_MATH_CM0_FAMILY
70 /* Run the below code for Cortex-M4 and Cortex-M3 */
72 q31_t packedValue
; /* value packed to 32 bits */
76 blkCnt
= blockSize
>> 2u;
78 /* Packing two 16 bit values to 32 bit value in order to use SIMD */
79 packedValue
= __PKHBT(value
, value
, 16u);
81 /* First part of the processing with loop unrolling. Compute 4 outputs at a time.
82 ** a second loop below computes the remaining 1 to 3 samples. */
86 /* Fill the value in the destination buffer */
87 *__SIMD32(pDst
)++ = packedValue
;
88 *__SIMD32(pDst
)++ = packedValue
;
90 /* Decrement the loop counter */
94 /* If the blockSize is not a multiple of 4, compute any remaining output samples here.
95 ** No loop unrolling is used. */
96 blkCnt
= blockSize
% 0x4u
;
100 /* Run the below code for Cortex-M0 */
102 /* Loop over blockSize number of values */
105 #endif /* #ifndef ARM_MATH_CM0_FAMILY */
110 /* Fill the value in the destination buffer */
113 /* Decrement the loop counter */
119 * @} end of Fill group