build: Merge submodules into repo

src/minarch/libretro-common/audio/resampler/drivers/sinc_resampler_neon.S

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+/* Copyright  (C) 2010-2020 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (sinc_resampler_neon.S).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#if defined(__ARM_NEON__) && defined(HAVE_ARM_NEON_ASM_OPTIMIZATIONS)
+
+#ifndef __MACH__
+.arm
+#endif
+.align 4
+.globl process_sinc_neon_asm
+#ifndef __MACH__
+.type process_sinc_neon_asm, %function
+#endif
+.globl _process_sinc_neon_asm
+#ifndef __MACH__
+.type _process_sinc_neon_asm, %function
+#endif
+# void process_sinc_neon(float *out, const float *left, const float *right, const float *coeff, unsigned taps)
+# Assumes taps is >= 8, and a multiple of 8.
+process_sinc_neon_asm:
+_process_sinc_neon_asm:
+
+   push {r4, lr}
+   vmov.f32 q0, #0.0
+   vmov.f32 q8, #0.0
+
+   # Taps argument (r4) goes on stack in armeabi.
+   ldr r4, [sp, #8]
+
+1:
+   # Left
+   vld1.f32 {q2-q3}, [r1]!
+   # Right
+   vld1.f32 {q10-q11}, [r2]!
+   # Coeff
+   vld1.f32 {q12-q13}, [r3, :128]!
+
+   # Left / Right
+   vmla.f32 q0, q2, q12
+   vmla.f32 q8, q10, q12
+   vmla.f32 q0, q3, q13
+   vmla.f32 q8, q11, q13
+
+   subs r4, r4, #8
+   bne 1b
+
+   # Add everything together
+   vadd.f32 d0, d0, d1
+   vadd.f32 d16, d16, d17
+   vpadd.f32 d0, d0, d16
+   vst1.f32 d0, [r0]
+
+   pop {r4, pc}
+
+#endif