2001-06-13 18:03:09 +00:00
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; libFLAC - Free Lossless Audio Codec library
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; Copyright (C) 2001 Josh Coalson
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;
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; This library is free software; you can redistribute it and/or
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; modify it under the terms of the GNU Library General Public
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; License as published by the Free Software Foundation; either
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; version 2 of the License, or (at your option) any later version.
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;
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; This library is distributed in the hope that it will be useful,
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; but WITHOUT ANY WARRANTY; without even the implied warranty of
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; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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; Library General Public License for more details.
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;
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; You should have received a copy of the GNU Library General Public
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; License along with this library; if not, write to the
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; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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; Boston, MA 02111-1307, USA.
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%include "nasm.h"
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data_section
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2001-06-13 18:11:25 +00:00
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cglobal FLAC__fixed_compute_best_predictor_asm_ia32_mmx_cmov
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2001-06-13 18:03:09 +00:00
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code_section
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; **********************************************************************
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;
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2001-06-23 03:03:24 +00:00
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; unsigned FLAC__fixed_compute_best_predictor(const FLAC__int32 data[], unsigned data_len, FLAC__real residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1])
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2001-06-13 18:03:09 +00:00
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; {
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2001-06-23 03:03:24 +00:00
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; FLAC__int32 last_error_0 = data[-1];
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; FLAC__int32 last_error_1 = data[-1] - data[-2];
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; FLAC__int32 last_error_2 = last_error_1 - (data[-2] - data[-3]);
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; FLAC__int32 last_error_3 = last_error_2 - (data[-2] - 2*data[-3] + data[-4]);
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; FLAC__int32 error, save;
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; FLAC__uint32 total_error_0 = 0, total_error_1 = 0, total_error_2 = 0, total_error_3 = 0, total_error_4 = 0;
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2001-06-13 18:03:09 +00:00
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; unsigned i, order;
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;
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; for(i = 0; i < data_len; i++) {
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; error = data[i] ; total_error_0 += local_abs(error); save = error;
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; error -= last_error_0; total_error_1 += local_abs(error); last_error_0 = save; save = error;
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; error -= last_error_1; total_error_2 += local_abs(error); last_error_1 = save; save = error;
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; error -= last_error_2; total_error_3 += local_abs(error); last_error_2 = save; save = error;
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; error -= last_error_3; total_error_4 += local_abs(error); last_error_3 = save;
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; }
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;
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; if(total_error_0 < min(min(min(total_error_1, total_error_2), total_error_3), total_error_4))
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; order = 0;
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; else if(total_error_1 < min(min(total_error_2, total_error_3), total_error_4))
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; order = 1;
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; else if(total_error_2 < min(total_error_3, total_error_4))
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; order = 2;
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; else if(total_error_3 < total_error_4)
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; order = 3;
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; else
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; order = 4;
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;
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2001-06-23 03:03:24 +00:00
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; residual_bits_per_sample[0] = (FLAC__real)((data_len > 0 && total_error_0 > 0) ? log(M_LN2 * (double)total_error_0 / (double)data_len) / M_LN2 : 0.0);
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; residual_bits_per_sample[1] = (FLAC__real)((data_len > 0 && total_error_1 > 0) ? log(M_LN2 * (double)total_error_1 / (double)data_len) / M_LN2 : 0.0);
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; residual_bits_per_sample[2] = (FLAC__real)((data_len > 0 && total_error_2 > 0) ? log(M_LN2 * (double)total_error_2 / (double)data_len) / M_LN2 : 0.0);
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; residual_bits_per_sample[3] = (FLAC__real)((data_len > 0 && total_error_3 > 0) ? log(M_LN2 * (double)total_error_3 / (double)data_len) / M_LN2 : 0.0);
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; residual_bits_per_sample[4] = (FLAC__real)((data_len > 0 && total_error_4 > 0) ? log(M_LN2 * (double)total_error_4 / (double)data_len) / M_LN2 : 0.0);
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2001-06-13 18:03:09 +00:00
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;
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; return order;
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; }
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ALIGN 16
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2001-06-13 18:11:25 +00:00
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cident FLAC__fixed_compute_best_predictor_asm_ia32_mmx_cmov
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2001-06-13 18:03:09 +00:00
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; esp + 36 == data[]
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; esp + 40 == data_len
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; esp + 44 == residual_bits_per_sample[]
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push ebp
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push ebx
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push esi
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push edi
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sub esp, byte 16
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2001-06-23 03:03:24 +00:00
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; qword [esp] == temp space for loading FLAC__uint64s to FPU regs
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2001-06-13 18:03:09 +00:00
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; dword [esp] == last_error_0
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; dword [esp + 4] == last_error_1
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; dword [esp + 8] == last_error_2
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; dword [esp + 12] == last_error_3
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; eax == error
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; ebx == &data[i]
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; ecx == loop counter (i)
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; edx == temp
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; edi == save
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; ebp == order
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; mm0 == total_error_1:total_error_0
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; mm1 == total_error_3:total_error_2
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; mm2 == 0:total_error_4
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; mm3/4 == 0:unpackarea
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; mm5 == abs(error_1):abs(error_0)
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; mm5 == abs(error_3):abs(error_2)
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pxor mm0, mm0 ; total_error_1 = total_error_0 = 0
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pxor mm1, mm1 ; total_error_3 = total_error_2 = 0
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pxor mm2, mm2 ; total_error_4 = 0
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mov ebx, [esp + 36] ; ebx = data[]
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mov ecx, [ebx - 4] ; ecx == data[-1] last_error_0 = data[-1]
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mov eax, [ebx - 8] ; eax == data[-2]
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mov ebp, [ebx - 16] ; ebp == data[-4]
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mov ebx, [ebx - 12] ; ebx == data[-3]
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mov edx, ecx
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sub edx, eax ; last_error_1 = data[-1] - data[-2]
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mov esi, edx
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sub esi, eax
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add esi, ebx ; last_error_2 = last_error_1 - (data[-2] - data[-3])
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shl ebx, 1
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mov edi, esi
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sub edi, eax
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add edi, ebx
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sub edi, ebp ; last_error_3 = last_error_2 - (data[-2] - 2*data[-3] + data[-4]);
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mov ebx, [esp + 36] ; ebx = data[]
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mov [esp], ecx ; [esp] = last_error_0
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mov [esp + 4], edx ; [esp + 4] = last_error_1
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mov [esp + 8], esi ; [esp + 8] = last_error_2
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mov [esp + 12], edi ; [esp + 12] = last_error_3
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mov ecx, [esp + 40] ; ecx = data_len
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; for(i = 0; i < data_len; i++) {
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; error_0 = data[i] ; save = error_0; total_error_0 += local_abs(error_0);
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; error_1 -= last_error_0; last_error_0 = save; save = error_1; total_error_1 += local_abs(error_1);
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; error_2 -= last_error_1; last_error_1 = save; save = error_2; total_error_2 += local_abs(error_2);
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; error_3 -= last_error_2; last_error_2 = save; save = error_3; total_error_3 += local_abs(error_3);
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; error_4 -= last_error_3; last_error_3 = save; total_error_4 += local_abs(error_4);
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; }
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ALIGN 16
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.loop:
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mov eax, [ebx] ; eax = error_0 = data[i]
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add ebx, 4
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mov edi, eax ; edi == save = error_0
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mov edx, eax ; edx = error_0
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neg edx ; edx = -error_0
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cmovns eax, edx ; eax = abs(error_0)
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movd mm5, eax ; mm5 = 0:abs(error_0)
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mov edx, [esp] ; edx = last_error_0
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mov eax, edi ; eax = error(error_0)
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mov [esp], edi ; [esp] == last_error_0 = save
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sub eax, edx ; error -= last_error_0
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mov edi, eax ; edi == save = error_1
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mov edx, eax ; edx = error_1
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neg edx ; edx = -error_1
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cmovns eax, edx ; eax = abs(error_1)
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movd mm4, eax ; mm4 = 0:abs(error_1)
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punpckldq mm5, mm4 ; mm5 = abs(error_1):abs(error_0)
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mov edx, [esp + 4] ; edx = last_error_1
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mov eax, edi ; eax = error(error_1)
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mov [esp + 4], edi ; [esp + 4] == last_error_1 = save
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sub eax, edx ; error -= last_error_1
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mov edi, eax ; edi == save = error_2
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mov edx, eax ; edx = error_2
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paddd mm0, mm5 ; [CR] total_error_1 += abs(error_1) ; total_error_0 += abs(error_0)
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neg edx ; edx = -error_2
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cmovns eax, edx ; eax = abs(error_2)
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movd mm5, eax ; mm5 = 0:abs(error_2)
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mov edx, [esp + 8] ; edx = last_error_2
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mov eax, edi ; eax = error(error_2)
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mov [esp + 8], edi ; [esp + 8] == last_error_2 = save
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sub eax, edx ; error -= last_error_2
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mov edi, eax ; edi == save = error_3
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mov edx, eax ; edx = error_3
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neg edx ; edx = -error_3
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cmovns eax, edx ; eax = abs(error_3)
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movd mm4, eax ; mm4 = 0:abs(error_3)
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punpckldq mm5, mm4 ; mm5 = abs(error_3):abs(error_2)
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mov edx, [esp + 12] ; edx = last_error_3
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mov eax, edi ; eax = error(error_3)
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mov [esp + 12], edi ; [esp + 12] == last_error_3 = save
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sub eax, edx ; error -= last_error_3
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mov edx, eax ; edx = error_4
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paddd mm1, mm5 ; [CR] total_error_3 += abs(error_3) ; total_error_2 += abs(error_2)
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neg edx ; edx = -error_4
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cmovns eax, edx ; eax = abs(error_4)
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movd mm5, eax ; mm5 = 0:abs(error_4)
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paddd mm2, mm5 ; total_error_4 += abs(error_4)
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dec ecx
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jnz near .loop
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; if(total_error_0 < min(min(min(total_error_1, total_error_2), total_error_3), total_error_4))
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; order = 0;
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; else if(total_error_1 < min(min(total_error_2, total_error_3), total_error_4))
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; order = 1;
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; else if(total_error_2 < min(total_error_3, total_error_4))
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; order = 2;
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; else if(total_error_3 < total_error_4)
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; order = 3;
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; else
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; order = 4;
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movd edi, mm2 ; edi = total_error_4
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movq mm4, mm1 ; mm4 = total_error_3:total_error_2
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psrlq mm4, 32 ; mm4 = 0:total_error_3
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movd edx, mm1 ; edx = total_error_2
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movd esi, mm4 ; esi = total_error_3
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movq mm3, mm0 ; mm3 = total_error_1:total_error_0
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psrlq mm3, 32 ; mm3 = 0:total_error_1
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movd ebx, mm0 ; ebx = total_error_0
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movd ecx, mm3 ; ecx = total_error_1
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emms
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mov eax, ebx ; eax = total_error_0
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cmp ecx, ebx
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cmovb eax, ecx ; eax = min(total_error_0, total_error_1)
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cmp edx, eax
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cmovb eax, edx ; eax = min(total_error_0, total_error_1, total_error_2)
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cmp esi, eax
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cmovb eax, esi ; eax = min(total_error_0, total_error_1, total_error_2, total_error_3)
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cmp edi, eax
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cmovb eax, edi ; eax = min(total_error_0, total_error_1, total_error_2, total_error_3, total_error_4)
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cmp eax, ebx
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jne .not_order_0
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xor ebp, ebp
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jmp short .got_order
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.not_order_0:
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cmp eax, ecx
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jne .not_order_1
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mov ebp, 1
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jmp short .got_order
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.not_order_1:
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cmp eax, edx
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jne .not_order_2
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mov ebp, 2
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jmp short .got_order
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.not_order_2:
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cmp eax, esi
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jne .not_order_3
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mov ebp, 3
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jmp short .got_order
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.not_order_3:
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mov ebp, 4
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.got_order:
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2001-06-23 03:03:24 +00:00
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; residual_bits_per_sample[0] = (FLAC__real)((data_len > 0 && total_error_0 > 0) ? log(M_LN2 * (double)total_error_0 / (double)data_len) / M_LN2 : 0.0);
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; residual_bits_per_sample[1] = (FLAC__real)((data_len > 0 && total_error_1 > 0) ? log(M_LN2 * (double)total_error_1 / (double)data_len) / M_LN2 : 0.0);
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; residual_bits_per_sample[2] = (FLAC__real)((data_len > 0 && total_error_2 > 0) ? log(M_LN2 * (double)total_error_2 / (double)data_len) / M_LN2 : 0.0);
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; residual_bits_per_sample[3] = (FLAC__real)((data_len > 0 && total_error_3 > 0) ? log(M_LN2 * (double)total_error_3 / (double)data_len) / M_LN2 : 0.0);
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; residual_bits_per_sample[4] = (FLAC__real)((data_len > 0 && total_error_4 > 0) ? log(M_LN2 * (double)total_error_4 / (double)data_len) / M_LN2 : 0.0);
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2001-06-13 18:03:09 +00:00
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xor eax, eax
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cmp eax, [esp + 40]
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je near .data_len_is_0
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fild dword [esp + 40] ; ST = data_len (NOTE: assumes data_len is <2gigs)
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.rbps_0:
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test ebx, ebx
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jz .total_error_0_is_0
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fld1 ; ST = 1.0 data_len
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mov [esp], ebx
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2001-06-23 03:03:24 +00:00
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mov [esp + 4], eax ; [esp] = (FLAC__uint64)total_error_0
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2001-06-13 18:03:09 +00:00
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mov ebx, [esp + 44]
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fild qword [esp] ; ST = total_error_0 1.0 data_len
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fdiv st2 ; ST = total_error_0/data_len 1.0 data_len
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fldln2 ; ST = ln2 total_error_0/data_len 1.0 data_len
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fmulp st1 ; ST = ln2*total_error_0/data_len 1.0 data_len
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fyl2x ; ST = log2(ln2*total_error_0/data_len) data_len
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fstp dword [ebx] ; residual_bits_per_sample[0] = log2(ln2*total_error_0/data_len) ST = data_len
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jmp short .rbps_1
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.total_error_0_is_0:
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mov ebx, [esp + 44]
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mov [ebx], eax ; residual_bits_per_sample[0] = 0.0
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.rbps_1:
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test ecx, ecx
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jz .total_error_1_is_0
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fld1 ; ST = 1.0 data_len
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mov [esp], ecx
|
2001-06-23 03:03:24 +00:00
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mov [esp + 4], eax ; [esp] = (FLAC__uint64)total_error_1
|
2001-06-13 18:03:09 +00:00
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|
fild qword [esp] ; ST = total_error_1 1.0 data_len
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fdiv st2 ; ST = total_error_1/data_len 1.0 data_len
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fldln2 ; ST = ln2 total_error_1/data_len 1.0 data_len
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fmulp st1 ; ST = ln2*total_error_1/data_len 1.0 data_len
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fyl2x ; ST = log2(ln2*total_error_1/data_len) data_len
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fstp dword [ebx + 4] ; residual_bits_per_sample[1] = log2(ln2*total_error_1/data_len) ST = data_len
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|
|
jmp short .rbps_2
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.total_error_1_is_0:
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|
mov [ebx + 4], eax ; residual_bits_per_sample[1] = 0.0
|
|
|
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|
.rbps_2:
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test edx, edx
|
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|
jz .total_error_2_is_0
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|
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|
fld1 ; ST = 1.0 data_len
|
|
|
|
|
mov [esp], edx
|
2001-06-23 03:03:24 +00:00
|
|
|
mov [esp + 4], eax ; [esp] = (FLAC__uint64)total_error_2
|
2001-06-13 18:03:09 +00:00
|
|
|
fild qword [esp] ; ST = total_error_2 1.0 data_len
|
|
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|
|
fdiv st2 ; ST = total_error_2/data_len 1.0 data_len
|
|
|
|
|
fldln2 ; ST = ln2 total_error_2/data_len 1.0 data_len
|
|
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|
fmulp st1 ; ST = ln2*total_error_2/data_len 1.0 data_len
|
|
|
|
|
fyl2x ; ST = log2(ln2*total_error_2/data_len) data_len
|
|
|
|
|
fstp dword [ebx + 8] ; residual_bits_per_sample[2] = log2(ln2*total_error_2/data_len) ST = data_len
|
|
|
|
|
jmp short .rbps_3
|
|
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|
|
.total_error_2_is_0:
|
|
|
|
|
mov [ebx + 8], eax ; residual_bits_per_sample[2] = 0.0
|
|
|
|
|
.rbps_3:
|
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|
|
test esi, esi
|
|
|
|
|
jz .total_error_3_is_0
|
|
|
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|
fld1 ; ST = 1.0 data_len
|
|
|
|
|
mov [esp], esi
|
2001-06-23 03:03:24 +00:00
|
|
|
mov [esp + 4], eax ; [esp] = (FLAC__uint64)total_error_3
|
2001-06-13 18:03:09 +00:00
|
|
|
fild qword [esp] ; ST = total_error_3 1.0 data_len
|
|
|
|
|
fdiv st2 ; ST = total_error_3/data_len 1.0 data_len
|
|
|
|
|
fldln2 ; ST = ln2 total_error_3/data_len 1.0 data_len
|
|
|
|
|
fmulp st1 ; ST = ln2*total_error_3/data_len 1.0 data_len
|
|
|
|
|
fyl2x ; ST = log2(ln2*total_error_3/data_len) data_len
|
|
|
|
|
fstp dword [ebx + 12] ; residual_bits_per_sample[3] = log2(ln2*total_error_3/data_len) ST = data_len
|
|
|
|
|
jmp short .rbps_4
|
|
|
|
|
.total_error_3_is_0:
|
|
|
|
|
mov [ebx + 12], eax ; residual_bits_per_sample[3] = 0.0
|
|
|
|
|
.rbps_4:
|
|
|
|
|
test edi, edi
|
|
|
|
|
jz .total_error_4_is_0
|
|
|
|
|
fld1 ; ST = 1.0 data_len
|
|
|
|
|
mov [esp], edi
|
2001-06-23 03:03:24 +00:00
|
|
|
mov [esp + 4], eax ; [esp] = (FLAC__uint64)total_error_4
|
2001-06-13 18:03:09 +00:00
|
|
|
fild qword [esp] ; ST = total_error_4 1.0 data_len
|
|
|
|
|
fdiv st2 ; ST = total_error_4/data_len 1.0 data_len
|
|
|
|
|
fldln2 ; ST = ln2 total_error_4/data_len 1.0 data_len
|
|
|
|
|
fmulp st1 ; ST = ln2*total_error_4/data_len 1.0 data_len
|
|
|
|
|
fyl2x ; ST = log2(ln2*total_error_4/data_len) data_len
|
|
|
|
|
fstp dword [ebx + 16] ; residual_bits_per_sample[4] = log2(ln2*total_error_4/data_len) ST = data_len
|
|
|
|
|
jmp short .rbps_end
|
|
|
|
|
.total_error_4_is_0:
|
|
|
|
|
mov [ebx + 16], eax ; residual_bits_per_sample[4] = 0.0
|
|
|
|
|
.rbps_end:
|
|
|
|
|
fstp st0 ; ST = [empty]
|
|
|
|
|
jmp short .end
|
|
|
|
|
.data_len_is_0:
|
|
|
|
|
; data_len == 0, so residual_bits_per_sample[*] = 0.0
|
|
|
|
|
mov ecx, 5 ; eax still == 0, ecx = # of dwords of 0 to store
|
|
|
|
|
mov edi, [esp + 44]
|
|
|
|
|
rep stosd
|
|
|
|
|
|
|
|
|
|
.end:
|
|
|
|
|
mov eax, ebp ; return order
|
|
|
|
|
add esp, byte 16
|
|
|
|
|
pop edi
|
|
|
|
|
pop esi
|
|
|
|
|
pop ebx
|
|
|
|
|
pop ebp
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
end
|
