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1 ; | 1 ; |
2 ; jiss2fst-64.asm - fast integer IDCT (64-bit SSE2) | 2 ; jiss2fst-64.asm - fast integer IDCT (64-bit 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 ; Copyright 2009 D. R. Commander | 5 ; Copyright 2009 D. R. Commander |
6 ; | 6 ; |
7 ; Based on | 7 ; Based on |
8 ; x86 SIMD extension for IJG JPEG library | 8 ; x86 SIMD extension for IJG JPEG library |
9 ; Copyright (C) 1999-2006, MIYASAKA Masaru. | 9 ; Copyright (C) 1999-2006, MIYASAKA Masaru. |
10 ; For conditions of distribution and use, see copyright notice in jsimdext.inc | 10 ; For conditions of distribution and use, see copyright notice in jsimdext.inc |
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53 ; -------------------------------------------------------------------------- | 53 ; -------------------------------------------------------------------------- |
54 SECTION SEG_CONST | 54 SECTION SEG_CONST |
55 | 55 |
56 ; PRE_MULTIPLY_SCALE_BITS <= 2 (to avoid overflow) | 56 ; PRE_MULTIPLY_SCALE_BITS <= 2 (to avoid overflow) |
57 ; CONST_BITS + CONST_SHIFT + PRE_MULTIPLY_SCALE_BITS == 16 (for pmulhw) | 57 ; CONST_BITS + CONST_SHIFT + PRE_MULTIPLY_SCALE_BITS == 16 (for pmulhw) |
58 | 58 |
59 %define PRE_MULTIPLY_SCALE_BITS 2 | 59 %define PRE_MULTIPLY_SCALE_BITS 2 |
60 %define CONST_SHIFT (16 - PRE_MULTIPLY_SCALE_BITS - CONST_BITS) | 60 %define CONST_SHIFT (16 - PRE_MULTIPLY_SCALE_BITS - CONST_BITS) |
61 | 61 |
62 alignz 16 | 62 alignz 16 |
63 » global» EXTN(jconst_idct_ifast_sse2) | 63 » global» EXTN(jconst_idct_ifast_sse2) PRIVATE |
64 | 64 |
65 EXTN(jconst_idct_ifast_sse2): | 65 EXTN(jconst_idct_ifast_sse2): |
66 | 66 |
67 PW_F1414 times 8 dw F_1_414 << CONST_SHIFT | 67 PW_F1414 times 8 dw F_1_414 << CONST_SHIFT |
68 PW_F1847 times 8 dw F_1_847 << CONST_SHIFT | 68 PW_F1847 times 8 dw F_1_847 << CONST_SHIFT |
69 PW_MF1613 times 8 dw -F_1_613 << CONST_SHIFT | 69 PW_MF1613 times 8 dw -F_1_613 << CONST_SHIFT |
70 PW_F1082 times 8 dw F_1_082 << CONST_SHIFT | 70 PW_F1082 times 8 dw F_1_082 << CONST_SHIFT |
71 PB_CENTERJSAMP times 16 db CENTERJSAMPLE | 71 PB_CENTERJSAMP times 16 db CENTERJSAMPLE |
72 | 72 |
73 alignz 16 | 73 alignz 16 |
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86 ; r10 = jpeg_component_info * compptr | 86 ; r10 = jpeg_component_info * compptr |
87 ; r11 = JCOEFPTR coef_block | 87 ; r11 = JCOEFPTR coef_block |
88 ; r12 = JSAMPARRAY output_buf | 88 ; r12 = JSAMPARRAY output_buf |
89 ; r13 = JDIMENSION output_col | 89 ; r13 = JDIMENSION output_col |
90 | 90 |
91 %define original_rbp rbp+0 | 91 %define original_rbp rbp+0 |
92 %define wk(i) rbp-(WK_NUM-(i))*SIZEOF_XMMWORD ; xmmword wk[WK_NUM] | 92 %define wk(i) rbp-(WK_NUM-(i))*SIZEOF_XMMWORD ; xmmword wk[WK_NUM] |
93 %define WK_NUM 2 | 93 %define WK_NUM 2 |
94 | 94 |
95 align 16 | 95 align 16 |
96 » global» EXTN(jsimd_idct_ifast_sse2) | 96 » global» EXTN(jsimd_idct_ifast_sse2) PRIVATE |
97 | 97 |
98 EXTN(jsimd_idct_ifast_sse2): | 98 EXTN(jsimd_idct_ifast_sse2): |
99 push rbp | 99 push rbp |
100 mov rax,rsp ; rax = original rbp | 100 mov rax,rsp ; rax = original rbp |
101 sub rsp, byte 4 | 101 sub rsp, byte 4 |
102 and rsp, byte (-SIZEOF_XMMWORD) ; align to 128 bits | 102 and rsp, byte (-SIZEOF_XMMWORD) ; align to 128 bits |
103 mov [rsp],rax | 103 mov [rsp],rax |
104 mov rbp,rsp ; rbp = aligned rbp | 104 mov rbp,rsp ; rbp = aligned rbp |
105 lea rsp, [wk(0)] | 105 lea rsp, [wk(0)] |
106 collect_args | 106 collect_args |
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483 uncollect_args | 483 uncollect_args |
484 mov rsp,rbp ; rsp <- aligned rbp | 484 mov rsp,rbp ; rsp <- aligned rbp |
485 pop rsp ; rsp <- original rbp | 485 pop rsp ; rsp <- original rbp |
486 pop rbp | 486 pop rbp |
487 ret | 487 ret |
488 ret | 488 ret |
489 | 489 |
490 ; For some reason, the OS X linker does not honor the request to align the | 490 ; For some reason, the OS X linker does not honor the request to align the |
491 ; segment unless we do this. | 491 ; segment unless we do this. |
492 align 16 | 492 align 16 |
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