notaz.gp2x.de / pcsx_rearmed.git / blame
| Commit | Line | Data |
|---|---|---|
| 3719602c PC |
1 | /* Copyright (C) 2010-2020 The RetroArch team |
| 2 | * | |
| 3 | * --------------------------------------------------------------------------------------- | |
| 4 | * The following license statement only applies to this file (s16_to_float_neon.S). | |
| 5 | * --------------------------------------------------------------------------------------- | |
| 6 | * | |
| 7 | * Permission is hereby granted, free of charge, | |
| 8 | * to any person obtaining a copy of this software and associated documentation files (the "Software"), | |
| 9 | * to deal in the Software without restriction, including without limitation the rights to | |
| 10 | * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, | |
| 11 | * and to permit persons to whom the Software is furnished to do so, subject to the following conditions: | |
| 12 | * | |
| 13 | * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. | |
| 14 | * | |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, | |
| 16 | * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. | |
| 18 | * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, | |
| 19 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
| 20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | |
| 21 | */ | |
| 22 | #if defined(__ARM_NEON__) && defined(HAVE_ARM_NEON_ASM_OPTIMIZATIONS) | |
| 23 | ||
| 24 | #if defined(__thumb__) | |
| 25 | #define DECL_ARMMODE(x) " .align 2\n" " .global " x "\n" " .thumb\n" " .thumb_func\n" " .type " x ", %function\n" x ":\n" | |
| 26 | #else | |
| 27 | #define DECL_ARMMODE(x) " .align 4\n" " .global " x "\n" " .arm\n" x ":\n" | |
| 28 | #endif | |
| 29 | ||
| 30 | asm( | |
| 31 | DECL_ARMMODE("convert_s16_float_asm") | |
| 32 | DECL_ARMMODE("_convert_s16_float_asm") | |
| 33 | "# convert_s16_float_asm(float *out, const int16_t *in, size_t samples, const float *gain)\n" | |
| 34 | " # Hacky way to get a constant of 2^-15.\n" | |
| 35 | " # Might be faster to just load a constant from memory.\n" | |
| 36 | " # It's just done once however ...\n" | |
| 37 | " vmov.f32 q8, #0.25\n" | |
| 38 | " vmul.f32 q8, q8, q8\n" | |
| 39 | " vmul.f32 q8, q8, q8\n" | |
| 40 | " vmul.f32 q8, q8, q8\n" | |
| 41 | " vadd.f32 q8, q8, q8\n" | |
| 42 | "\n" | |
| 43 | " # Apply gain\n" | |
| 44 | " vld1.f32 {d6[0]}, [r3]\n" | |
| 45 | " vmul.f32 q8, q8, d6[0]\n" | |
| 46 | "\n" | |
| 47 | "1:\n" | |
| 48 | " # Preload here?\n" | |
| 49 | " vld1.s16 {q0}, [r1]!\n" | |
| 50 | "\n" | |
| 51 | " # Widen to 32-bit\n" | |
| 52 | " vmovl.s16 q1, d0\n" | |
| 53 | " vmovl.s16 q2, d1\n" | |
| 54 | "\n" | |
| 55 | " # Convert to float\n" | |
| 56 | " vcvt.f32.s32 q1, q1\n" | |
| 57 | " vcvt.f32.s32 q2, q2\n" | |
| 58 | "\n" | |
| 59 | " vmul.f32 q1, q1, q8\n" | |
| 60 | " vmul.f32 q2, q2, q8\n" | |
| 61 | "\n" | |
| 62 | " vst1.f32 {q1-q2}, [r0]!\n" | |
| 63 | "\n" | |
| 64 | " # Guaranteed to get samples in multiples of 8.\n" | |
| 65 | " subs r2, r2, #8\n" | |
| 66 | " bne 1b\n" | |
| 67 | "\n" | |
| 68 | " bx lr\n" | |
| 69 | "\n" | |
| 70 | ); | |
| 71 | #endif |