From f40bfc9267b13b54e6379dfe7539447662879d24 Mon Sep 17 00:00:00 2001 From: Sean Bartell Date: Sat, 25 Jun 2011 21:32:25 -0400 Subject: Add codecs to librbcodec. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97 Reviewed-on: http://gerrit.rockbox.org/137 Reviewed-by: Nils Wallménius Tested-by: Nils Wallménius --- lib/rbcodec/codecs/libatrac/atrac3_armv5e.S | 163 ++++++++++++++++++++++++++++ 1 file changed, 163 insertions(+) create mode 100644 lib/rbcodec/codecs/libatrac/atrac3_armv5e.S (limited to 'lib/rbcodec/codecs/libatrac/atrac3_armv5e.S') diff --git a/lib/rbcodec/codecs/libatrac/atrac3_armv5e.S b/lib/rbcodec/codecs/libatrac/atrac3_armv5e.S new file mode 100644 index 0000000000..1d9d35a5da --- /dev/null +++ b/lib/rbcodec/codecs/libatrac/atrac3_armv5e.S @@ -0,0 +1,163 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * $Id: + * + * Copyright (C) 2010 by Michael Giacomelli + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ****************************************************************************/ + +#include "config.h" + + .section .text, "ax", %progbits + + +/**************************************************************************** + * atrac3_iqmf_dewindowing_armv5e(int32_t *out, + * int32_t *in, + * int32_t *win, + * unsigned int nIn); + * + * Dewindowing step within iqmf of atrac3 synthesis using 16 bit filter + * coefficients and armv5e packed multiply instructions. Uses 2.5 cycles + * per filter coefficient (ideal). Benchmarked 3.54 per coefficient (Clip+). + * + * Reference implementation: + * + * for (j = nIn; j != 0; j--) { + * s1 = fixmul32(in[0], win[0]); + * s2 = fixmul32(in[1], win[1]); + * for (i = 2; i < 48; i += 2) { + * s1 += fixmul32(in[i ], win[i ]); + * s2 += fixmul32(in[i+1], win[i+1]); + * } + * out[0] = s2 << 1; + * out[1] = s1 << 1; + * in += 2; + * out += 2; + * } + * Note: r12 is a scratch register and can be used without restorage. + ****************************************************************************/ + .align 2 + .global atrac3_iqmf_dewindowing_armv5e + .type atrac3_iqmf_dewindowing_armv5e, %function + +atrac3_iqmf_dewindowing_armv5e: + /* r0 = dest */ + /* r1 = input samples */ + /* r2 = window coefficients */ + /* r3 = counter */ + stmfd sp!, {r4-r11, lr} /* save non-scratch registers */ + +.iqmf_dewindow_outer_loop: /* outer loop 0...counter-1 */ + /* 0.. 7 */ + ldmia r2!, {r4, r5, r8, r9} /* load win[0..7] */ + ldmia r1!, {r6, r7, r10, r11} /* load in[0..3] to avoid stall on arm11 */ + smulwb lr, r6, r4 /* s1 = in[0] * win[0] */ + smulwt r12, r7, r4 /* s2 = in[1] * win[1] */ + smlawb lr, r10, r5, lr /* s1 += in[i ] * win[i ] >> 16 */ + smlawt r12, r11,r5, r12 /* s2 += in[i+1] * win[i+1] >> 16 */ + + ldmia r1!, {r6, r7, r10, r11} /* load in[i...i+3] */ + smlawb lr, r6, r8, lr /* s1 += in[i ] * win[i ] >> 16 */ + smlawt r12, r7, r8, r12 /* s2 += in[i+1] * win[i+1] >> 16 */ + smlawb lr, r10, r9, lr /* s1 += in[i ] * win[i ] >> 16 */ + smlawt r12, r11, r9, r12 /* s2 += in[i+1] * win[i+1] >> 16 */ + + /* 8..15 */ + ldmia r2!, {r4, r5, r8, r9} /* load win[8..15] */ + ldmia r1!, {r6, r7, r10, r11} /* load in[i...i+3] */ + smlawb lr, r6, r4, lr /* s1 += in[i ] * win[i ] >> 16 */ + smlawt r12, r7, r4, r12 /* s2 += in[i+1] * win[i+1] >> 16 */ + smlawb lr, r10, r5, lr /* s1 += in[i ] * win[i ] >> 16 */ + smlawt r12, r11,r5, r12 /* s2 += in[i+1] * win[i+1] >> 16 */ + + ldmia r1!, {r6, r7, r10, r11} /* load in[i...i+3] */ + smlawb lr, r6, r8, lr /* s1 += in[i ] * win[i ] >> 16 */ + smlawt r12, r7, r8, r12 /* s2 += in[i+1] * win[i+1] >> 16 */ + smlawb lr, r10, r9, lr /* s1 += in[i ] * win[i ] >> 16 */ + smlawt r12, r11,r9, r12 /* s2 += in[i+1] * win[i+1] >> 16 */ + + /* 16..23 */ + ldmia r2!, {r4, r5, r8, r9} /* load win[16..23] */ + ldmia r1!, {r6, r7, r10, r11} /* load in[i...i+3] */ + smlawb lr, r6, r4, lr /* s1 += in[i ] * win[i ] >> 16 */ + smlawt r12, r7, r4, r12 /* s2 += in[i+1] * win[i+1] >> 16 */ + smlawb lr, r10, r5, lr /* s1 += in[i ] * win[i ] >> 16 */ + smlawt r12, r11,r5, r12 /* s2 += in[i+1] * win[i+1] >> 16 */ + + ldmia r1!, {r6, r7, r10, r11} /* load in[i...i+3] */ + smlawb lr, r6, r8, lr /* s1 += in[i ] * win[i ] >> 16 */ + smlawt r12, r7, r8, r12 /* s2 += in[i+1] * win[i+1] >> 16 */ + smlawb lr, r10, r9, lr /* s1 += in[i ] * win[i ] >> 16 */ + smlawt r12, r11,r9, r12 /* s2 += in[i+1] * win[i+1] >> 16 */ + + /* 24..31 */ + ldmia r2!, {r4, r5, r8, r9} /* load win[24..31] */ + ldmia r1!, {r6, r7, r10, r11} /* load in[i...i+3] */ + smlawb lr, r6, r4, lr /* s1 += in[i ] * win[i ] >> 16 */ + smlawt r12, r7, r4, r12 /* s2 += in[i+1] * win[i+1] >> 16 */ + smlawb lr, r10, r5, lr /* s1 += in[i ] * win[i ] >> 16 */ + smlawt r12, r11,r5, r12 /* s2 += in[i+1] * win[i+1] >> 16 */ + + ldmia r1!, {r6, r7, r10, r11} /* load in[i...i+3] */ + smlawb lr, r6, r8, lr /* s1 += in[i ] * win[i ] >> 16 */ + smlawt r12, r7, r8, r12 /* s2 += in[i+1] * win[i+1] >> 16 */ + smlawb lr, r10, r9, lr /* s1 += in[i ] * win[i ] >> 16 */ + smlawt r12, r11,r9, r12 /* s2 += in[i+1] * win[i+1] >> 16 */ + + /* 32..39 */ + ldmia r2!, {r4, r5, r8, r9} /* load win[32..39] */ + ldmia r1!, {r6, r7, r10, r11} /* load in[i...i+3] */ + smlawb lr, r6, r4, lr /* s1 += in[i ] * win[i ] >> 16 */ + smlawt r12, r7, r4, r12 /* s2 += in[i+1] * win[i+1] >> 16 */ + smlawb lr, r10, r5, lr /* s1 += in[i ] * win[i ] >> 16 */ + smlawt r12, r11,r5, r12 /* s2 += in[i+1] * win[i+1] >> 16 */ + + ldmia r1!, {r6, r7, r10, r11} /* load in[i...i+3] */ + smlawb lr, r6, r8, lr /* s1 += in[i ] * win[i ] >> 16 */ + smlawt r12, r7, r8, r12 /* s2 += in[i+1] * win[i+1] >> 16 */ + smlawb lr, r10, r9, lr /* s1 += in[i ] * win[i ] >> 16 */ + smlawt r12, r11,r9, r12 /* s2 += in[i+1] * win[i+1] >> 16 */ + + /* 40..47 */ + ldmia r2!, {r4, r5, r8, r9} /* load win[40..47] */ + ldmia r1!, {r6, r7, r10, r11} /* load in[i...i+3] */ + smlawb lr, r6, r4, lr /* s1 += in[i ] * win[i ] >> 16 */ + smlawt r12, r7, r4, r12 /* s2 += in[i+1] * win[i+1] >> 16 */ + smlawb lr, r10, r5, lr /* s1 += in[i ] * win[i ] >> 16 */ + smlawt r12, r11,r5, r12 /* s2 += in[i+1] * win[i+1] >> 16 */ + + ldmia r1!, {r6, r7, r10, r11} /* load in[i...i+3] */ + smlawb lr, r6, r8, lr /* s1 += in[i ] * win[i ] >> 16 */ + smlawt r12, r7, r8, r12 /* s2 += in[i+1] * win[i+1] >> 16 */ + smlawb lr, r10, r9, lr /* s1 += in[i ] * win[i ] >> 16 */ + smlawt r12, r11,r9, r12 /* s2 += in[i+1] * win[i+1] >> 16 */ + + + mov lr , lr , lsl #1 + mov r12, r12, lsl #1 + + stmia r0!, {r12, lr} /* store result out[0]=s2, out[1]=s1 */ + sub r1, r1, #184 /* roll back 64 entries = 184 bytes */ + sub r2, r2, #96 /* roll back 48 entries * 2 bytes = 96 bytes = win[0] */ + + subs r3, r3, #1 /* outer loop -= 1 */ + bgt .iqmf_dewindow_outer_loop + + ldmpc regs=r4-r11 /* restore registers */ + +.atrac3_iqmf_dewindowing_armv5e_end: + .size atrac3_iqmf_dewindowing_armv5e,.atrac3_iqmf_dewindowing_armv5e_end-atrac3_iqmf_dewindowing_armv5e -- cgit v1.2.3