fixed_asm.nasm
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上传日期:2014-04-03
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文件大小:12k
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Windows CE
开发平台:
C/C++
- ; libFLAC - Free Lossless Audio Codec library
- ; Copyright (C) 2001,2002,2003,2004,2005 Josh Coalson
- ;
- ; Redistribution and use in source and binary forms, with or without
- ; modification, are permitted provided that the following conditions
- ; are met:
- ;
- ; - Redistributions of source code must retain the above copyright
- ; notice, this list of conditions and the following disclaimer.
- ;
- ; - Redistributions in binary form must reproduce the above copyright
- ; notice, this list of conditions and the following disclaimer in the
- ; documentation and/or other materials provided with the distribution.
- ;
- ; - Neither the name of the Xiph.org Foundation nor the names of its
- ; contributors may be used to endorse or promote products derived from
- ; this software without specific prior written permission.
- ;
- ; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- ; ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- ; LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- ; A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
- ; CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- ; EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- ; PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- ; PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- ; LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- ; NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- ; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- %include "nasm.h"
- data_section
- cglobal FLAC__fixed_compute_best_predictor_asm_ia32_mmx_cmov
- code_section
- ; **********************************************************************
- ;
- ; unsigned FLAC__fixed_compute_best_predictor(const FLAC__int32 *data, unsigned data_len, FLAC__float residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1])
- ; {
- ; FLAC__int32 last_error_0 = data[-1];
- ; FLAC__int32 last_error_1 = data[-1] - data[-2];
- ; FLAC__int32 last_error_2 = last_error_1 - (data[-2] - data[-3]);
- ; FLAC__int32 last_error_3 = last_error_2 - (data[-2] - 2*data[-3] + data[-4]);
- ; FLAC__int32 error, save;
- ; FLAC__uint32 total_error_0 = 0, total_error_1 = 0, total_error_2 = 0, total_error_3 = 0, total_error_4 = 0;
- ; unsigned i, order;
- ;
- ; for(i = 0; i < data_len; i++) {
- ; error = data[i] ; total_error_0 += local_abs(error); save = error;
- ; error -= last_error_0; total_error_1 += local_abs(error); last_error_0 = save; save = error;
- ; error -= last_error_1; total_error_2 += local_abs(error); last_error_1 = save; save = error;
- ; error -= last_error_2; total_error_3 += local_abs(error); last_error_2 = save; save = error;
- ; error -= last_error_3; total_error_4 += local_abs(error); last_error_3 = save;
- ; }
- ;
- ; if(total_error_0 < min(min(min(total_error_1, total_error_2), total_error_3), total_error_4))
- ; order = 0;
- ; else if(total_error_1 < min(min(total_error_2, total_error_3), total_error_4))
- ; order = 1;
- ; else if(total_error_2 < min(total_error_3, total_error_4))
- ; order = 2;
- ; else if(total_error_3 < total_error_4)
- ; order = 3;
- ; else
- ; order = 4;
- ;
- ; residual_bits_per_sample[0] = (FLAC__float)((data_len > 0 && total_error_0 > 0) ? log(M_LN2 * (FLAC__double)total_error_0 / (FLAC__double)data_len) / M_LN2 : 0.0);
- ; residual_bits_per_sample[1] = (FLAC__float)((data_len > 0 && total_error_1 > 0) ? log(M_LN2 * (FLAC__double)total_error_1 / (FLAC__double)data_len) / M_LN2 : 0.0);
- ; residual_bits_per_sample[2] = (FLAC__float)((data_len > 0 && total_error_2 > 0) ? log(M_LN2 * (FLAC__double)total_error_2 / (FLAC__double)data_len) / M_LN2 : 0.0);
- ; residual_bits_per_sample[3] = (FLAC__float)((data_len > 0 && total_error_3 > 0) ? log(M_LN2 * (FLAC__double)total_error_3 / (FLAC__double)data_len) / M_LN2 : 0.0);
- ; residual_bits_per_sample[4] = (FLAC__float)((data_len > 0 && total_error_4 > 0) ? log(M_LN2 * (FLAC__double)total_error_4 / (FLAC__double)data_len) / M_LN2 : 0.0);
- ;
- ; return order;
- ; }
- ALIGN 16
- cident FLAC__fixed_compute_best_predictor_asm_ia32_mmx_cmov
- ; esp + 36 == data[]
- ; esp + 40 == data_len
- ; esp + 44 == residual_bits_per_sample[]
- push ebp
- push ebx
- push esi
- push edi
- sub esp, byte 16
- ; qword [esp] == temp space for loading FLAC__uint64s to FPU regs
- ; ebx == &data[i]
- ; ecx == loop counter (i)
- ; ebp == order
- ; mm0 == total_error_1:total_error_0
- ; mm1 == total_error_2:total_error_3
- ; mm2 == :total_error_4
- ; mm3 == last_error_1:last_error_0
- ; mm4 == last_error_2:last_error_3
- mov ecx, [esp + 40] ; ecx = data_len
- test ecx, ecx
- jz near .data_len_is_0
- mov ebx, [esp + 36] ; ebx = data[]
- movd mm3, [ebx - 4] ; mm3 = 0:last_error_0
- movd mm2, [ebx - 8] ; mm2 = 0:data[-2]
- movd mm1, [ebx - 12] ; mm1 = 0:data[-3]
- movd mm0, [ebx - 16] ; mm0 = 0:data[-4]
- movq mm5, mm3 ; mm5 = 0:last_error_0
- psubd mm5, mm2 ; mm5 = 0:last_error_1
- punpckldq mm3, mm5 ; mm3 = last_error_1:last_error_0
- psubd mm2, mm1 ; mm2 = 0:data[-2] - data[-3]
- psubd mm5, mm2 ; mm5 = 0:last_error_2
- movq mm4, mm5 ; mm4 = 0:last_error_2
- psubd mm4, mm2 ; mm4 = 0:last_error_2 - (data[-2] - data[-3])
- paddd mm4, mm1 ; mm4 = 0:last_error_2 - (data[-2] - 2 * data[-3])
- psubd mm4, mm0 ; mm4 = 0:last_error_3
- punpckldq mm4, mm5 ; mm4 = last_error_2:last_error_3
- pxor mm0, mm0 ; mm0 = total_error_1:total_error_0
- pxor mm1, mm1 ; mm1 = total_error_2:total_error_3
- pxor mm2, mm2 ; mm2 = 0:total_error_4
- ALIGN 16
- .loop:
- movd mm7, [ebx] ; mm7 = 0:error_0
- add ebx, byte 4
- movq mm6, mm7 ; mm6 = 0:error_0
- psubd mm7, mm3 ; mm7 = :error_1
- punpckldq mm6, mm7 ; mm6 = error_1:error_0
- movq mm5, mm6 ; mm5 = error_1:error_0
- movq mm7, mm6 ; mm7 = error_1:error_0
- psubd mm5, mm3 ; mm5 = error_2:
- movq mm3, mm6 ; mm3 = error_1:error_0
- psrad mm6, 31
- pxor mm7, mm6
- psubd mm7, mm6 ; mm7 = abs(error_1):abs(error_0)
- paddd mm0, mm7 ; mm0 = total_error_1:total_error_0
- movq mm6, mm5 ; mm6 = error_2:
- psubd mm5, mm4 ; mm5 = error_3:
- punpckhdq mm5, mm6 ; mm5 = error_2:error_3
- movq mm7, mm5 ; mm7 = error_2:error_3
- movq mm6, mm5 ; mm6 = error_2:error_3
- psubd mm5, mm4 ; mm5 = :error_4
- movq mm4, mm6 ; mm4 = error_2:error_3
- psrad mm6, 31
- pxor mm7, mm6
- psubd mm7, mm6 ; mm7 = abs(error_2):abs(error_3)
- paddd mm1, mm7 ; mm1 = total_error_2:total_error_3
- movq mm6, mm5 ; mm6 = :error_4
- psrad mm5, 31
- pxor mm6, mm5
- psubd mm6, mm5 ; mm6 = :abs(error_4)
- paddd mm2, mm6 ; mm2 = :total_error_4
- dec ecx
- jnz short .loop
- ; if(total_error_0 < min(min(min(total_error_1, total_error_2), total_error_3), total_error_4))
- ; order = 0;
- ; else if(total_error_1 < min(min(total_error_2, total_error_3), total_error_4))
- ; order = 1;
- ; else if(total_error_2 < min(total_error_3, total_error_4))
- ; order = 2;
- ; else if(total_error_3 < total_error_4)
- ; order = 3;
- ; else
- ; order = 4;
- movq mm3, mm0 ; mm3 = total_error_1:total_error_0
- movd edi, mm2 ; edi = total_error_4
- movd esi, mm1 ; esi = total_error_3
- movd eax, mm0 ; eax = total_error_0
- punpckhdq mm1, mm1 ; mm1 = total_error_2:total_error_2
- punpckhdq mm3, mm3 ; mm3 = total_error_1:total_error_1
- movd edx, mm1 ; edx = total_error_2
- movd ecx, mm3 ; ecx = total_error_1
- xor ebx, ebx
- xor ebp, ebp
- inc ebx
- cmp ecx, eax
- cmovb eax, ecx ; eax = min(total_error_0, total_error_1)
- cmovbe ebp, ebx
- inc ebx
- cmp edx, eax
- cmovb eax, edx ; eax = min(total_error_0, total_error_1, total_error_2)
- cmovbe ebp, ebx
- inc ebx
- cmp esi, eax
- cmovb eax, esi ; eax = min(total_error_0, total_error_1, total_error_2, total_error_3)
- cmovbe ebp, ebx
- inc ebx
- cmp edi, eax
- cmovb eax, edi ; eax = min(total_error_0, total_error_1, total_error_2, total_error_3, total_error_4)
- cmovbe ebp, ebx
- movd ebx, mm0 ; ebx = total_error_0
- emms
- ; residual_bits_per_sample[0] = (FLAC__float)((data_len > 0 && total_error_0 > 0) ? log(M_LN2 * (FLAC__double)total_error_0 / (FLAC__double)data_len) / M_LN2 : 0.0);
- ; residual_bits_per_sample[1] = (FLAC__float)((data_len > 0 && total_error_1 > 0) ? log(M_LN2 * (FLAC__double)total_error_1 / (FLAC__double)data_len) / M_LN2 : 0.0);
- ; residual_bits_per_sample[2] = (FLAC__float)((data_len > 0 && total_error_2 > 0) ? log(M_LN2 * (FLAC__double)total_error_2 / (FLAC__double)data_len) / M_LN2 : 0.0);
- ; residual_bits_per_sample[3] = (FLAC__float)((data_len > 0 && total_error_3 > 0) ? log(M_LN2 * (FLAC__double)total_error_3 / (FLAC__double)data_len) / M_LN2 : 0.0);
- ; residual_bits_per_sample[4] = (FLAC__float)((data_len > 0 && total_error_4 > 0) ? log(M_LN2 * (FLAC__double)total_error_4 / (FLAC__double)data_len) / M_LN2 : 0.0);
- xor eax, eax
- fild dword [esp + 40] ; ST = data_len (NOTE: assumes data_len is <2gigs)
- .rbps_0:
- test ebx, ebx
- jz .total_error_0_is_0
- fld1 ; ST = 1.0 data_len
- mov [esp], ebx
- mov [esp + 4], eax ; [esp] = (FLAC__uint64)total_error_0
- mov ebx, [esp + 44]
- fild qword [esp] ; ST = total_error_0 1.0 data_len
- fdiv st2 ; ST = total_error_0/data_len 1.0 data_len
- fldln2 ; ST = ln2 total_error_0/data_len 1.0 data_len
- fmulp st1 ; ST = ln2*total_error_0/data_len 1.0 data_len
- fyl2x ; ST = log2(ln2*total_error_0/data_len) data_len
- fstp dword [ebx] ; residual_bits_per_sample[0] = log2(ln2*total_error_0/data_len) ST = data_len
- jmp short .rbps_1
- .total_error_0_is_0:
- mov ebx, [esp + 44]
- mov [ebx], eax ; residual_bits_per_sample[0] = 0.0
- .rbps_1:
- test ecx, ecx
- jz .total_error_1_is_0
- fld1 ; ST = 1.0 data_len
- mov [esp], ecx
- mov [esp + 4], eax ; [esp] = (FLAC__uint64)total_error_1
- fild qword [esp] ; ST = total_error_1 1.0 data_len
- fdiv st2 ; ST = total_error_1/data_len 1.0 data_len
- fldln2 ; ST = ln2 total_error_1/data_len 1.0 data_len
- fmulp st1 ; ST = ln2*total_error_1/data_len 1.0 data_len
- fyl2x ; ST = log2(ln2*total_error_1/data_len) data_len
- fstp dword [ebx + 4] ; residual_bits_per_sample[1] = log2(ln2*total_error_1/data_len) ST = data_len
- jmp short .rbps_2
- .total_error_1_is_0:
- mov [ebx + 4], eax ; residual_bits_per_sample[1] = 0.0
- .rbps_2:
- test edx, edx
- jz .total_error_2_is_0
- fld1 ; ST = 1.0 data_len
- mov [esp], edx
- mov [esp + 4], eax ; [esp] = (FLAC__uint64)total_error_2
- fild qword [esp] ; ST = total_error_2 1.0 data_len
- fdiv st2 ; ST = total_error_2/data_len 1.0 data_len
- fldln2 ; ST = ln2 total_error_2/data_len 1.0 data_len
- 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
- .total_error_2_is_0:
- mov [ebx + 8], eax ; residual_bits_per_sample[2] = 0.0
- .rbps_3:
- test esi, esi
- jz .total_error_3_is_0
- fld1 ; ST = 1.0 data_len
- mov [esp], esi
- mov [esp + 4], eax ; [esp] = (FLAC__uint64)total_error_3
- 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
- mov [esp + 4], eax ; [esp] = (FLAC__uint64)total_error_4
- 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
- xor ebp, ebp
- mov edi, [esp + 44]
- mov [edi], ebp
- mov [edi + 4], ebp
- mov [edi + 8], ebp
- mov [edi + 12], ebp
- mov [edi + 16], ebp
- add ebp, byte 4 ; order = 4
- .end:
- mov eax, ebp ; return order
- add esp, byte 16
- pop edi
- pop esi
- pop ebx
- pop ebp
- ret
- end