add some code

managed_components/espressif__esp-dsp/modules/math/mulc/float/dsps_mulc_f32_ae32.S

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+// Copyright 2018-2019 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License. 
+
+#include "dsps_mulc_platform.h"
+#if (dsps_mulc_f32_ae32_enabled == 1)
+
+// This is bi quad filter form II for ESP32 processor.
+    .text
+    .align  4
+    .global dsps_mulc_f32_ae32
+    .type   dsps_mulc_f32_ae32,@function
+// The function implements the following C code:
+// esp_err_t dsps_mulc_f32_ansi(const float *input, float *output, int len, float C, int step_in, int step_out)
+// {
+//     for (int i = 0 ; i < len ; i++) {
+//         output[i * step_out] = input[i * step_in] * C;
+//     }
+//     return ESP_OK;
+// }
+dsps_mulc_f32_ae32: 
+// input   - a2
+// output   - a3
+// len      - a4
+// C        - a5
+// step_in  - a6
+// step_out - a7
+
+    entry	a1, 16
+    
+    slli 	a6, a6, 2  	// a6 - step_in<<2
+    slli 	a7, a7, 2  	// a7 - step_out<<2
+    wfr		f0, a5		// a5 - load to the f0
+
+    loopnez a4, loop_end_mulc_f32_ae32
+        lsi      f1, a2, 0
+
+        mul.s    f2, f1, f0     // f2 = f1 * f0
+        add.n    a2, a2, a6     // input1_ptr+=step_in;
+        ssi	     f2, a3, 0
+        add.n    a3, a3, a7     // output+=step_out;
+loop_end_mulc_f32_ae32:
+
+    movi.n	a2, 0 // return status ESP_OK
+    retw.n
+
+#endif // dsps_mulc_f32_ae32_enabled

managed_components/espressif__esp-dsp/modules/math/mulc/float/dsps_mulc_f32_ansi.c

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+// Copyright 2018-2019 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "dsps_mulc.h"
+
+esp_err_t dsps_mulc_f32_ansi(const float *input, float *output, int len, float C, int step_in, int step_out)
+{
+    if (NULL == input) {
+        return ESP_ERR_DSP_PARAM_OUTOFRANGE;
+    }
+    if (NULL == output) {
+        return ESP_ERR_DSP_PARAM_OUTOFRANGE;
+    }
+
+    for (int i = 0 ; i < len ; i++) {
+        output[i * step_out] = input[i * step_in] * C;
+    }
+    return ESP_OK;
+}