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1 ; | 1 ; |
2 ; jfdctint.asm - accurate integer FDCT (SSE2) | 2 ; jfdctint.asm - accurate integer FDCT (SSE2) |
3 ; | 3 ; |
4 ; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB | 4 ; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB |
5 ; | 5 ; |
6 ; Based on | 6 ; Based on |
7 ; x86 SIMD extension for IJG JPEG library | 7 ; x86 SIMD extension for IJG JPEG library |
8 ; Copyright (C) 1999-2006, MIYASAKA Masaru. | 8 ; Copyright (C) 1999-2006, MIYASAKA Masaru. |
9 ; For conditions of distribution and use, see copyright notice in jsimdext.inc | 9 ; For conditions of distribution and use, see copyright notice in jsimdext.inc |
10 ; | 10 ; |
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59 F_1_961 equ DESCALE(2106220350,30-CONST_BITS) ; FIX(1.961570560) | 59 F_1_961 equ DESCALE(2106220350,30-CONST_BITS) ; FIX(1.961570560) |
60 F_2_053 equ DESCALE(2204520673,30-CONST_BITS) ; FIX(2.053119869) | 60 F_2_053 equ DESCALE(2204520673,30-CONST_BITS) ; FIX(2.053119869) |
61 F_2_562 equ DESCALE(2751909506,30-CONST_BITS) ; FIX(2.562915447) | 61 F_2_562 equ DESCALE(2751909506,30-CONST_BITS) ; FIX(2.562915447) |
62 F_3_072 equ DESCALE(3299298341,30-CONST_BITS) ; FIX(3.072711026) | 62 F_3_072 equ DESCALE(3299298341,30-CONST_BITS) ; FIX(3.072711026) |
63 %endif | 63 %endif |
64 | 64 |
65 ; -------------------------------------------------------------------------- | 65 ; -------------------------------------------------------------------------- |
66 SECTION SEG_CONST | 66 SECTION SEG_CONST |
67 | 67 |
68 alignz 16 | 68 alignz 16 |
69 global EXTN(jconst_fdct_islow_sse2) | 69 global EXTN(jconst_fdct_islow_sse2) PRIVATE |
70 | 70 |
71 EXTN(jconst_fdct_islow_sse2): | 71 EXTN(jconst_fdct_islow_sse2): |
72 | 72 |
73 PW_F130_F054 times 4 dw (F_0_541+F_0_765), F_0_541 | 73 PW_F130_F054 times 4 dw (F_0_541+F_0_765), F_0_541 |
74 PW_F054_MF130 times 4 dw F_0_541, (F_0_541-F_1_847) | 74 PW_F054_MF130 times 4 dw F_0_541, (F_0_541-F_1_847) |
75 PW_MF078_F117 times 4 dw (F_1_175-F_1_961), F_1_175 | 75 PW_MF078_F117 times 4 dw (F_1_175-F_1_961), F_1_175 |
76 PW_F117_F078 times 4 dw F_1_175, (F_1_175-F_0_390) | 76 PW_F117_F078 times 4 dw F_1_175, (F_1_175-F_0_390) |
77 PW_MF060_MF089 times 4 dw (F_0_298-F_0_899),-F_0_899 | 77 PW_MF060_MF089 times 4 dw (F_0_298-F_0_899),-F_0_899 |
78 PW_MF089_F060 times 4 dw -F_0_899, (F_1_501-F_0_899) | 78 PW_MF089_F060 times 4 dw -F_0_899, (F_1_501-F_0_899) |
79 PW_MF050_MF256 times 4 dw (F_2_053-F_2_562),-F_2_562 | 79 PW_MF050_MF256 times 4 dw (F_2_053-F_2_562),-F_2_562 |
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94 ; jsimd_fdct_islow_sse2 (DCTELEM *data) | 94 ; jsimd_fdct_islow_sse2 (DCTELEM *data) |
95 ; | 95 ; |
96 | 96 |
97 %define data(b) (b)+8 ; DCTELEM *data | 97 %define data(b) (b)+8 ; DCTELEM *data |
98 | 98 |
99 %define original_ebp ebp+0 | 99 %define original_ebp ebp+0 |
100 %define wk(i) ebp-(WK_NUM-(i))*SIZEOF_XMMWORD ; xmmword wk[WK_NUM] | 100 %define wk(i) ebp-(WK_NUM-(i))*SIZEOF_XMMWORD ; xmmword wk[WK_NUM] |
101 %define WK_NUM 6 | 101 %define WK_NUM 6 |
102 | 102 |
103 align 16 | 103 align 16 |
104 global EXTN(jsimd_fdct_islow_sse2) | 104 global EXTN(jsimd_fdct_islow_sse2) PRIVATE |
105 | 105 |
106 EXTN(jsimd_fdct_islow_sse2): | 106 EXTN(jsimd_fdct_islow_sse2): |
107 push ebp | 107 push ebp |
108 mov eax,esp ; eax = original ebp | 108 mov eax,esp ; eax = original ebp |
109 sub esp, byte 4 | 109 sub esp, byte 4 |
110 and esp, byte (-SIZEOF_XMMWORD) ; align to 128 bits | 110 and esp, byte (-SIZEOF_XMMWORD) ; align to 128 bits |
111 mov [esp],eax | 111 mov [esp],eax |
112 mov ebp,esp ; ebp = aligned ebp | 112 mov ebp,esp ; ebp = aligned ebp |
113 lea esp, [wk(0)] | 113 lea esp, [wk(0)] |
114 pushpic ebx | 114 pushpic ebx |
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625 ; pop ecx ; unused | 625 ; pop ecx ; unused |
626 poppic ebx | 626 poppic ebx |
627 mov esp,ebp ; esp <- aligned ebp | 627 mov esp,ebp ; esp <- aligned ebp |
628 pop esp ; esp <- original ebp | 628 pop esp ; esp <- original ebp |
629 pop ebp | 629 pop ebp |
630 ret | 630 ret |
631 | 631 |
632 ; For some reason, the OS X linker does not honor the request to align the | 632 ; For some reason, the OS X linker does not honor the request to align the |
633 ; segment unless we do this. | 633 ; segment unless we do this. |
634 align 16 | 634 align 16 |
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