| ; |
| ; jchuff-sse2.asm - Huffman entropy encoding (SSE2) |
| ; |
| ; Copyright (C) 2009-2011, 2014-2017, 2019, D. R. Commander. |
| ; Copyright (C) 2015, Matthieu Darbois. |
| ; Copyright (C) 2018, Matthias Rรคncker. |
| ; |
| ; Based on the x86 SIMD extension for IJG JPEG library |
| ; Copyright (C) 1999-2006, MIYASAKA Masaru. |
| ; For conditions of distribution and use, see copyright notice in jsimdext.inc |
| ; |
| ; This file should be assembled with NASM (Netwide Assembler), |
| ; can *not* be assembled with Microsoft's MASM or any compatible |
| ; assembler (including Borland's Turbo Assembler). |
| ; NASM is available from http://nasm.sourceforge.net/ or |
| ; http://sourceforge.net/project/showfiles.php?group_id=6208 |
| ; |
| ; This file contains an SSE2 implementation for Huffman coding of one block. |
| ; The following code is based on jchuff.c; see jchuff.c for more details. |
| |
| %include "jsimdext.inc" |
| |
| struc working_state |
| .next_output_byte: resp 1 ; => next byte to write in buffer |
| .free_in_buffer: resp 1 ; # of byte spaces remaining in buffer |
| .cur.put_buffer.simd resq 1 ; current bit accumulation buffer |
| .cur.free_bits resd 1 ; # of bits available in it |
| .cur.last_dc_val resd 4 ; last DC coef for each component |
| .cinfo: resp 1 ; dump_buffer needs access to this |
| endstruc |
| |
| struc c_derived_tbl |
| .ehufco: resd 256 ; code for each symbol |
| .ehufsi: resb 256 ; length of code for each symbol |
| ; If no code has been allocated for a symbol S, ehufsi[S] contains 0 |
| endstruc |
| |
| ; -------------------------------------------------------------------------- |
| SECTION SEG_CONST |
| |
| GLOBAL_DATA(jconst_huff_encode_one_block) |
| |
| EXTN(jconst_huff_encode_one_block): |
| |
| alignz 32 |
| |
| jpeg_mask_bits dq 0x0000, 0x0001, 0x0003, 0x0007 |
| dq 0x000f, 0x001f, 0x003f, 0x007f |
| dq 0x00ff, 0x01ff, 0x03ff, 0x07ff |
| dq 0x0fff, 0x1fff, 0x3fff, 0x7fff |
| |
| times 1 << 14 db 15 |
| times 1 << 13 db 14 |
| times 1 << 12 db 13 |
| times 1 << 11 db 12 |
| times 1 << 10 db 11 |
| times 1 << 9 db 10 |
| times 1 << 8 db 9 |
| times 1 << 7 db 8 |
| times 1 << 6 db 7 |
| times 1 << 5 db 6 |
| times 1 << 4 db 5 |
| times 1 << 3 db 4 |
| times 1 << 2 db 3 |
| times 1 << 1 db 2 |
| times 1 << 0 db 1 |
| times 1 db 0 |
| jpeg_nbits_table: |
| times 1 db 0 |
| times 1 << 0 db 1 |
| times 1 << 1 db 2 |
| times 1 << 2 db 3 |
| times 1 << 3 db 4 |
| times 1 << 4 db 5 |
| times 1 << 5 db 6 |
| times 1 << 6 db 7 |
| times 1 << 7 db 8 |
| times 1 << 8 db 9 |
| times 1 << 9 db 10 |
| times 1 << 10 db 11 |
| times 1 << 11 db 12 |
| times 1 << 12 db 13 |
| times 1 << 13 db 14 |
| times 1 << 14 db 15 |
| |
| alignz 32 |
| |
| %ifdef PIC |
| %define NBITS(x) nbits_base + x |
| %else |
| %define NBITS(x) jpeg_nbits_table + x |
| %endif |
| %define MASK_BITS(x) NBITS((x) * 8) + (jpeg_mask_bits - jpeg_nbits_table) |
| |
| ; -------------------------------------------------------------------------- |
| SECTION SEG_TEXT |
| BITS 32 |
| |
| %define mm_put_buffer mm0 |
| %define mm_all_0xff mm1 |
| %define mm_temp mm2 |
| %define mm_nbits mm3 |
| %define mm_code_bits mm3 |
| %define mm_code mm4 |
| %define mm_overflow_bits mm5 |
| %define mm_save_nbits mm6 |
| |
| ; Shorthand used to describe SIMD operations: |
| ; wN: xmmN treated as eight signed 16-bit values |
| ; wN[i]: perform the same operation on all eight signed 16-bit values, i=0..7 |
| ; bN: xmmN treated as 16 unsigned 8-bit values, or |
| ; mmN treated as eight unsigned 8-bit values |
| ; bN[i]: perform the same operation on all unsigned 8-bit values, |
| ; i=0..15 (SSE register) or i=0..7 (MMX register) |
| ; Contents of SIMD registers are shown in memory order. |
| |
| ; Fill the bit buffer to capacity with the leading bits from code, then output |
| ; the bit buffer and put the remaining bits from code into the bit buffer. |
| ; |
| ; Usage: |
| ; code - contains the bits to shift into the bit buffer (LSB-aligned) |
| ; %1 - temp register |
| ; %2 - low byte of temp register |
| ; %3 - second byte of temp register |
| ; %4-%8 (optional) - extra instructions to execute before the macro completes |
| ; %9 - the label to which to jump when the macro completes |
| ; |
| ; Upon completion, free_bits will be set to the number of remaining bits from |
| ; code, and put_buffer will contain those remaining bits. temp and code will |
| ; be clobbered. |
| ; |
| ; This macro encodes any 0xFF bytes as 0xFF 0x00, as does the EMIT_BYTE() |
| ; macro in jchuff.c. |
| |
| %macro EMIT_QWORD 9 |
| %define %%temp %1 |
| %define %%tempb %2 |
| %define %%temph %3 |
| add nbits, free_bits ; nbits += free_bits; |
| neg free_bits ; free_bits = -free_bits; |
| movq mm_temp, mm_code ; temp = code; |
| movd mm_nbits, nbits ; nbits --> MMX register |
| movd mm_overflow_bits, free_bits ; overflow_bits (temp register) = free_bits; |
| neg free_bits ; free_bits = -free_bits; |
| psllq mm_put_buffer, mm_nbits ; put_buffer <<= nbits; |
| psrlq mm_temp, mm_overflow_bits ; temp >>= overflow_bits; |
| add free_bits, 64 ; free_bits += 64; |
| por mm_temp, mm_put_buffer ; temp |= put_buffer; |
| %ifidn %%temp, nbits_base |
| movd mm_save_nbits, nbits_base ; save nbits_base |
| %endif |
| movq mm_code_bits, mm_temp ; code_bits (temp register) = temp; |
| movq mm_put_buffer, mm_code ; put_buffer = code; |
| pcmpeqb mm_temp, mm_all_0xff ; b_temp[i] = (b_temp[i] == 0xFF ? 0xFF : 0); |
| movq mm_code, mm_code_bits ; code = code_bits; |
| psrlq mm_code_bits, 32 ; code_bits >>= 32; |
| pmovmskb nbits, mm_temp ; nbits = 0; nbits |= ((b_temp[i] >> 7) << i); |
| movd %%temp, mm_code_bits ; temp = code_bits; |
| bswap %%temp ; temp = htonl(temp); |
| test nbits, nbits ; if (nbits != 0) /* Some 0xFF bytes */ |
| jnz %%.SLOW ; goto %%.SLOW |
| mov dword [buffer], %%temp ; *(uint32_t)buffer = temp; |
| %ifidn %%temp, nbits_base |
| movd nbits_base, mm_save_nbits ; restore nbits_base |
| %endif |
| %4 |
| movd nbits, mm_code ; nbits = (uint32_t)(code); |
| %5 |
| bswap nbits ; nbits = htonl(nbits); |
| mov dword [buffer + 4], nbits ; *(uint32_t)(buffer + 4) = nbits; |
| lea buffer, [buffer + 8] ; buffer += 8; |
| %6 |
| %7 |
| %8 |
| jmp %9 ; return |
| %%.SLOW: |
| ; Execute the equivalent of the EMIT_BYTE() macro in jchuff.c for all 8 |
| ; bytes in the qword. |
| mov byte [buffer], %%tempb ; buffer[0] = temp[0]; |
| cmp %%tempb, 0xFF ; Set CF if temp[0] < 0xFF |
| mov byte [buffer+1], 0 ; buffer[1] = 0; |
| sbb buffer, -2 ; buffer -= (-2 + (temp[0] < 0xFF ? 1 : 0)); |
| mov byte [buffer], %%temph ; buffer[0] = temp[1]; |
| cmp %%temph, 0xFF ; Set CF if temp[1] < 0xFF |
| mov byte [buffer+1], 0 ; buffer[1] = 0; |
| sbb buffer, -2 ; buffer -= (-2 + (temp[1] < 0xFF ? 1 : 0)); |
| shr %%temp, 16 ; temp >>= 16; |
| mov byte [buffer], %%tempb ; buffer[0] = temp[0]; |
| cmp %%tempb, 0xFF ; Set CF if temp[0] < 0xFF |
| mov byte [buffer+1], 0 ; buffer[1] = 0; |
| sbb buffer, -2 ; buffer -= (-2 + (temp[0] < 0xFF ? 1 : 0)); |
| mov byte [buffer], %%temph ; buffer[0] = temp[1]; |
| cmp %%temph, 0xFF ; Set CF if temp[1] < 0xFF |
| mov byte [buffer+1], 0 ; buffer[1] = 0; |
| sbb buffer, -2 ; buffer -= (-2 + (temp[1] < 0xFF ? 1 : 0)); |
| movd nbits, mm_code ; nbits (temp register) = (uint32_t)(code) |
| %ifidn %%temp, nbits_base |
| movd nbits_base, mm_save_nbits ; restore nbits_base |
| %endif |
| bswap nbits ; nbits = htonl(nbits) |
| mov byte [buffer], nbitsb ; buffer[0] = nbits[0]; |
| cmp nbitsb, 0xFF ; Set CF if nbits[0] < 0xFF |
| mov byte [buffer+1], 0 ; buffer[1] = 0; |
| sbb buffer, -2 ; buffer -= (-2 + (nbits[0] < 0xFF ? 1 : 0)); |
| mov byte [buffer], nbitsh ; buffer[0] = nbits[1]; |
| cmp nbitsh, 0xFF ; Set CF if nbits[1] < 0xFF |
| mov byte [buffer+1], 0 ; buffer[1] = 0; |
| sbb buffer, -2 ; buffer -= (-2 + (nbits[1] < 0xFF ? 1 : 0)); |
| shr nbits, 16 ; nbits >>= 16; |
| mov byte [buffer], nbitsb ; buffer[0] = nbits[0]; |
| cmp nbitsb, 0xFF ; Set CF if nbits[0] < 0xFF |
| mov byte [buffer+1], 0 ; buffer[1] = 0; |
| sbb buffer, -2 ; buffer -= (-2 + (nbits[0] < 0xFF ? 1 : 0)); |
| mov byte [buffer], nbitsh ; buffer[0] = nbits[1]; |
| %4 |
| cmp nbitsh, 0xFF ; Set CF if nbits[1] < 0xFF |
| mov byte [buffer+1], 0 ; buffer[1] = 0; |
| sbb buffer, -2 ; buffer -= (-2 + (nbits[1] < 0xFF ? 1 : 0)); |
| %5 |
| %6 |
| %7 |
| %8 |
| jmp %9 ; return; |
| %endmacro |
| |
| %macro PUSH 1 |
| push %1 |
| %assign stack_offset stack_offset + 4 |
| %endmacro |
| |
| %macro POP 1 |
| pop %1 |
| %assign stack_offset stack_offset - 4 |
| %endmacro |
| |
| ; If PIC is defined, load the address of a symbol defined in this file into a |
| ; register. Equivalent to |
| ; get_GOT %1 |
| ; lea %1, [GOTOFF(%1, %2)] |
| ; without using the GOT. |
| ; |
| ; Usage: |
| ; %1 - register into which to load the address of the symbol |
| ; %2 - symbol whose address should be loaded |
| ; %3 - optional multi-line macro to execute before the symbol address is loaded |
| ; %4 - optional multi-line macro to execute after the symbol address is loaded |
| ; |
| ; If PIC is not defined, then %3 and %4 are executed in order. |
| |
| %macro GET_SYM 2-4 |
| %ifdef PIC |
| call %%.geteip |
| %%.ref: |
| %4 |
| add %1, %2 - %%.ref |
| jmp short %%.done |
| align 32 |
| %%.geteip: |
| %3 4 ; must adjust stack pointer because of call |
| mov %1, POINTER [esp] |
| ret |
| align 32 |
| %%.done: |
| %else |
| %3 0 |
| %4 |
| %endif |
| %endmacro |
| |
| ; |
| ; Encode a single block's worth of coefficients. |
| ; |
| ; GLOBAL(JOCTET *) |
| ; jsimd_huff_encode_one_block_sse2(working_state *state, JOCTET *buffer, |
| ; JCOEFPTR block, int last_dc_val, |
| ; c_derived_tbl *dctbl, c_derived_tbl *actbl) |
| ; |
| ; Stack layout: |
| ; Function args |
| ; Return address |
| ; Saved ebx |
| ; Saved ebp |
| ; Saved esi |
| ; Saved edi <-- esp_save |
| ; ... |
| ; esp_save |
| ; t_ 64*2 bytes (aligned to 128 bytes) |
| ; |
| ; esp is used (as t) to point into t_ (data in lower indices is not used once |
| ; esp passes over them, so this is signal-safe.) Aligning to 128 bytes allows |
| ; us to find the rest of the data again. |
| ; |
| ; NOTES: |
| ; When shuffling data, we try to avoid pinsrw as much as possible, since it is |
| ; slow on many CPUs. Its reciprocal throughput (issue latency) is 1 even on |
| ; modern CPUs, so chains of pinsrw instructions (even with different outputs) |
| ; can limit performance. pinsrw is a VectorPath instruction on AMD K8 and |
| ; requires 2 ยตops (with memory operand) on Intel. In either case, only one |
| ; pinsrw instruction can be decoded per cycle (and nothing else if they are |
| ; back-to-back), so out-of-order execution cannot be used to work around long |
| ; pinsrw chains (though for Sandy Bridge and later, this may be less of a |
| ; problem if the code runs from the ยตop cache.) |
| ; |
| ; We use tzcnt instead of bsf without checking for support. The instruction is |
| ; executed as bsf on CPUs that don't support tzcnt (encoding is equivalent to |
| ; rep bsf.) The destination (first) operand of bsf (and tzcnt on some CPUs) is |
| ; an input dependency (although the behavior is not formally defined, Intel |
| ; CPUs usually leave the destination unmodified if the source is zero.) This |
| ; can prevent out-of-order execution, so we clear the destination before |
| ; invoking tzcnt. |
| ; |
| ; Initial register allocation |
| ; eax - frame --> buffer |
| ; ebx - nbits_base (PIC) / emit_temp |
| ; ecx - dctbl --> size --> state |
| ; edx - block --> nbits |
| ; esi - code_temp --> state --> actbl |
| ; edi - index_temp --> free_bits |
| ; esp - t |
| ; ebp - index |
| |
| %define frame eax |
| %ifdef PIC |
| %define nbits_base ebx |
| %endif |
| %define emit_temp ebx |
| %define emit_tempb bl |
| %define emit_temph bh |
| %define dctbl ecx |
| %define block edx |
| %define code_temp esi |
| %define index_temp edi |
| %define t esp |
| %define index ebp |
| |
| %assign save_frame DCTSIZE2 * SIZEOF_WORD |
| |
| ; Step 1: Re-arrange input data according to jpeg_natural_order |
| ; xx 01 02 03 04 05 06 07 xx 01 08 16 09 02 03 10 |
| ; 08 09 10 11 12 13 14 15 17 24 32 25 18 11 04 05 |
| ; 16 17 18 19 20 21 22 23 12 19 26 33 40 48 41 34 |
| ; 24 25 26 27 28 29 30 31 ==> 27 20 13 06 07 14 21 28 |
| ; 32 33 34 35 36 37 38 39 35 42 49 56 57 50 43 36 |
| ; 40 41 42 43 44 45 46 47 29 22 15 23 30 37 44 51 |
| ; 48 49 50 51 52 53 54 55 58 59 52 45 38 31 39 46 |
| ; 56 57 58 59 60 61 62 63 53 60 61 54 47 55 62 63 |
| |
| align 32 |
| GLOBAL_FUNCTION(jsimd_huff_encode_one_block_sse2) |
| |
| EXTN(jsimd_huff_encode_one_block_sse2): |
| |
| %assign stack_offset 0 |
| %define arg_state 4 + stack_offset |
| %define arg_buffer 8 + stack_offset |
| %define arg_block 12 + stack_offset |
| %define arg_last_dc_val 16 + stack_offset |
| %define arg_dctbl 20 + stack_offset |
| %define arg_actbl 24 + stack_offset |
| |
| ;X: X = code stream |
| mov block, [esp + arg_block] |
| PUSH ebx |
| PUSH ebp |
| movups xmm3, XMMWORD [block + 0 * SIZEOF_WORD] ;D: w3 = xx 01 02 03 04 05 06 07 |
| PUSH esi |
| PUSH edi |
| movdqa xmm0, xmm3 ;A: w0 = xx 01 02 03 04 05 06 07 |
| mov frame, esp |
| lea t, [frame - (save_frame + 4)] |
| movups xmm1, XMMWORD [block + 8 * SIZEOF_WORD] ;B: w1 = 08 09 10 11 12 13 14 15 |
| and t, -DCTSIZE2 * SIZEOF_WORD ; t = &t_[0] |
| mov [t + save_frame], frame |
| pxor xmm4, xmm4 ;A: w4[i] = 0; |
| punpckldq xmm0, xmm1 ;A: w0 = xx 01 08 09 02 03 10 11 |
| pshuflw xmm0, xmm0, 11001001b ;A: w0 = 01 08 xx 09 02 03 10 11 |
| pinsrw xmm0, word [block + 16 * SIZEOF_WORD], 2 ;A: w0 = 01 08 16 09 02 03 10 11 |
| punpckhdq xmm3, xmm1 ;D: w3 = 04 05 12 13 06 07 14 15 |
| punpcklqdq xmm1, xmm3 ;B: w1 = 08 09 10 11 04 05 12 13 |
| pinsrw xmm0, word [block + 17 * SIZEOF_WORD], 7 ;A: w0 = 01 08 16 09 02 03 10 17 |
| ;A: (Row 0, offset 1) |
| pcmpgtw xmm4, xmm0 ;A: w4[i] = (w0[i] < 0 ? -1 : 0); |
| paddw xmm0, xmm4 ;A: w0[i] += w4[i]; |
| movaps XMMWORD [t + 0 * SIZEOF_WORD], xmm0 ;A: t[i] = w0[i]; |
| |
| movq xmm2, qword [block + 24 * SIZEOF_WORD] ;B: w2 = 24 25 26 27 -- -- -- -- |
| pshuflw xmm2, xmm2, 11011000b ;B: w2 = 24 26 25 27 -- -- -- -- |
| pslldq xmm1, 1 * SIZEOF_WORD ;B: w1 = -- 08 09 10 11 04 05 12 |
| movups xmm5, XMMWORD [block + 48 * SIZEOF_WORD] ;H: w5 = 48 49 50 51 52 53 54 55 |
| movsd xmm1, xmm2 ;B: w1 = 24 26 25 27 11 04 05 12 |
| punpcklqdq xmm2, xmm5 ;C: w2 = 24 26 25 27 48 49 50 51 |
| pinsrw xmm1, word [block + 32 * SIZEOF_WORD], 1 ;B: w1 = 24 32 25 27 11 04 05 12 |
| pxor xmm4, xmm4 ;A: w4[i] = 0; |
| psrldq xmm3, 2 * SIZEOF_WORD ;D: w3 = 12 13 06 07 14 15 -- -- |
| pcmpeqw xmm0, xmm4 ;A: w0[i] = (w0[i] == 0 ? -1 : 0); |
| pinsrw xmm1, word [block + 18 * SIZEOF_WORD], 3 ;B: w1 = 24 32 25 18 11 04 05 12 |
| ; (Row 1, offset 1) |
| pcmpgtw xmm4, xmm1 ;B: w4[i] = (w1[i] < 0 ? -1 : 0); |
| paddw xmm1, xmm4 ;B: w1[i] += w4[i]; |
| movaps XMMWORD [t + 8 * SIZEOF_WORD], xmm1 ;B: t[i+8] = w1[i]; |
| pxor xmm4, xmm4 ;B: w4[i] = 0; |
| pcmpeqw xmm1, xmm4 ;B: w1[i] = (w1[i] == 0 ? -1 : 0); |
| |
| packsswb xmm0, xmm1 ;AB: b0[i] = w0[i], b0[i+8] = w1[i] |
| ; w/ signed saturation |
| |
| pinsrw xmm3, word [block + 20 * SIZEOF_WORD], 0 ;D: w3 = 20 13 06 07 14 15 -- -- |
| pinsrw xmm3, word [block + 21 * SIZEOF_WORD], 5 ;D: w3 = 20 13 06 07 14 21 -- -- |
| pinsrw xmm3, word [block + 28 * SIZEOF_WORD], 6 ;D: w3 = 20 13 06 07 14 21 28 -- |
| pinsrw xmm3, word [block + 35 * SIZEOF_WORD], 7 ;D: w3 = 20 13 06 07 14 21 28 35 |
| ; (Row 3, offset 1) |
| pcmpgtw xmm4, xmm3 ;D: w4[i] = (w3[i] < 0 ? -1 : 0); |
| paddw xmm3, xmm4 ;D: w3[i] += w4[i]; |
| movaps XMMWORD [t + 24 * SIZEOF_WORD], xmm3 ;D: t[i+24] = w3[i]; |
| pxor xmm4, xmm4 ;D: w4[i] = 0; |
| pcmpeqw xmm3, xmm4 ;D: w3[i] = (w3[i] == 0 ? -1 : 0); |
| |
| pinsrw xmm2, word [block + 19 * SIZEOF_WORD], 0 ;C: w2 = 19 26 25 27 48 49 50 51 |
| pinsrw xmm2, word [block + 33 * SIZEOF_WORD], 2 ;C: w2 = 19 26 33 27 48 49 50 51 |
| pinsrw xmm2, word [block + 40 * SIZEOF_WORD], 3 ;C: w2 = 19 26 33 40 48 49 50 51 |
| pinsrw xmm2, word [block + 41 * SIZEOF_WORD], 5 ;C: w2 = 19 26 33 40 48 41 50 51 |
| pinsrw xmm2, word [block + 34 * SIZEOF_WORD], 6 ;C: w2 = 19 26 33 40 48 41 34 51 |
| pinsrw xmm2, word [block + 27 * SIZEOF_WORD], 7 ;C: w2 = 19 26 33 40 48 41 34 27 |
| ; (Row 2, offset 1) |
| pcmpgtw xmm4, xmm2 ;C: w4[i] = (w2[i] < 0 ? -1 : 0); |
| paddw xmm2, xmm4 ;C: w2[i] += w4[i]; |
| movsx code_temp, word [block] ;Z: code_temp = block[0]; |
| |
| ; %1 - stack pointer adjustment |
| %macro GET_SYM_BEFORE 1 |
| movaps XMMWORD [t + 16 * SIZEOF_WORD + %1], xmm2 |
| ;C: t[i+16] = w2[i]; |
| pxor xmm4, xmm4 ;C: w4[i] = 0; |
| pcmpeqw xmm2, xmm4 ;C: w2[i] = (w2[i] == 0 ? -1 : 0); |
| sub code_temp, [frame + arg_last_dc_val] ;Z: code_temp -= last_dc_val; |
| |
| packsswb xmm2, xmm3 ;CD: b2[i] = w2[i], b2[i+8] = w3[i] |
| ; w/ signed saturation |
| |
| movdqa xmm3, xmm5 ;H: w3 = 48 49 50 51 52 53 54 55 |
| pmovmskb index_temp, xmm2 ;Z: index_temp = 0; index_temp |= ((b2[i] >> 7) << i); |
| pmovmskb index, xmm0 ;Z: index = 0; index |= ((b0[i] >> 7) << i); |
| movups xmm0, XMMWORD [block + 56 * SIZEOF_WORD] ;H: w0 = 56 57 58 59 60 61 62 63 |
| punpckhdq xmm3, xmm0 ;H: w3 = 52 53 60 61 54 55 62 63 |
| shl index_temp, 16 ;Z: index_temp <<= 16; |
| psrldq xmm3, 1 * SIZEOF_WORD ;H: w3 = 53 60 61 54 55 62 63 -- |
| pxor xmm2, xmm2 ;H: w2[i] = 0; |
| pshuflw xmm3, xmm3, 00111001b ;H: w3 = 60 61 54 53 55 62 63 -- |
| or index, index_temp ;Z: index |= index_temp; |
| %undef index_temp |
| %define free_bits edi |
| %endmacro |
| |
| %macro GET_SYM_AFTER 0 |
| movq xmm1, qword [block + 44 * SIZEOF_WORD] ;G: w1 = 44 45 46 47 -- -- -- -- |
| unpcklps xmm5, xmm0 ;E: w5 = 48 49 56 57 50 51 58 59 |
| pxor xmm0, xmm0 ;H: w0[i] = 0; |
| not index ;Z: index = ~index; |
| pinsrw xmm3, word [block + 47 * SIZEOF_WORD], 3 ;H: w3 = 60 61 54 47 55 62 63 -- |
| ; (Row 7, offset 1) |
| pcmpgtw xmm2, xmm3 ;H: w2[i] = (w3[i] < 0 ? -1 : 0); |
| mov dctbl, [frame + arg_dctbl] |
| paddw xmm3, xmm2 ;H: w3[i] += w2[i]; |
| movaps XMMWORD [t + 56 * SIZEOF_WORD], xmm3 ;H: t[i+56] = w3[i]; |
| movq xmm4, qword [block + 36 * SIZEOF_WORD] ;G: w4 = 36 37 38 39 -- -- -- -- |
| pcmpeqw xmm3, xmm0 ;H: w3[i] = (w3[i] == 0 ? -1 : 0); |
| punpckldq xmm4, xmm1 ;G: w4 = 36 37 44 45 38 39 46 47 |
| movdqa xmm1, xmm4 ;F: w1 = 36 37 44 45 38 39 46 47 |
| pcmpeqw mm_all_0xff, mm_all_0xff ;Z: all_0xff[i] = 0xFF; |
| %endmacro |
| |
| GET_SYM nbits_base, jpeg_nbits_table, GET_SYM_BEFORE, GET_SYM_AFTER |
| |
| psrldq xmm4, 1 * SIZEOF_WORD ;G: w4 = 37 44 45 38 39 46 47 -- |
| shufpd xmm1, xmm5, 10b ;F: w1 = 36 37 44 45 50 51 58 59 |
| pshufhw xmm4, xmm4, 11010011b ;G: w4 = 37 44 45 38 -- 39 46 -- |
| pslldq xmm1, 1 * SIZEOF_WORD ;F: w1 = -- 36 37 44 45 50 51 58 |
| pinsrw xmm4, word [block + 59 * SIZEOF_WORD], 0 ;G: w4 = 59 44 45 38 -- 39 46 -- |
| pshufd xmm1, xmm1, 11011000b ;F: w1 = -- 36 45 50 37 44 51 58 |
| cmp code_temp, 1 << 31 ;Z: Set CF if code_temp < 0x80000000, |
| ;Z: i.e. if code_temp is positive |
| pinsrw xmm4, word [block + 52 * SIZEOF_WORD], 1 ;G: w4 = 59 52 45 38 -- 39 46 -- |
| movlps xmm1, qword [block + 20 * SIZEOF_WORD] ;F: w1 = 20 21 22 23 37 44 51 58 |
| pinsrw xmm4, word [block + 31 * SIZEOF_WORD], 4 ;G: w4 = 59 52 45 38 31 39 46 -- |
| pshuflw xmm1, xmm1, 01110010b ;F: w1 = 22 20 23 21 37 44 51 58 |
| pinsrw xmm4, word [block + 53 * SIZEOF_WORD], 7 ;G: w4 = 59 52 45 38 31 39 46 53 |
| ; (Row 6, offset 1) |
| adc code_temp, -1 ;Z: code_temp += -1 + (code_temp >= 0 ? 1 : 0); |
| pxor xmm2, xmm2 ;G: w2[i] = 0; |
| pcmpgtw xmm0, xmm4 ;G: w0[i] = (w4[i] < 0 ? -1 : 0); |
| pinsrw xmm1, word [block + 15 * SIZEOF_WORD], 1 ;F: w1 = 22 15 23 21 37 44 51 58 |
| paddw xmm4, xmm0 ;G: w4[i] += w0[i]; |
| movaps XMMWORD [t + 48 * SIZEOF_WORD], xmm4 ;G: t[48+i] = w4[i]; |
| movd mm_temp, code_temp ;Z: temp = code_temp |
| pinsrw xmm1, word [block + 30 * SIZEOF_WORD], 3 ;F: w1 = 22 15 23 30 37 44 51 58 |
| ; (Row 5, offset 1) |
| pcmpeqw xmm4, xmm2 ;G: w4[i] = (w4[i] == 0 ? -1 : 0); |
| |
| packsswb xmm4, xmm3 ;GH: b4[i] = w4[i], b4[i+8] = w3[i] |
| ; w/ signed saturation |
| |
| lea t, [t - SIZEOF_WORD] ;Z: t = &t[-1] |
| pxor xmm0, xmm0 ;F: w0[i] = 0; |
| pcmpgtw xmm2, xmm1 ;F: w2[i] = (w1[i] < 0 ? -1 : 0); |
| paddw xmm1, xmm2 ;F: w1[i] += w2[i]; |
| movaps XMMWORD [t + (40+1) * SIZEOF_WORD], xmm1 ;F: t[40+i] = w1[i]; |
| pcmpeqw xmm1, xmm0 ;F: w1[i] = (w1[i] == 0 ? -1 : 0); |
| pinsrw xmm5, word [block + 42 * SIZEOF_WORD], 0 ;E: w5 = 42 49 56 57 50 51 58 59 |
| pinsrw xmm5, word [block + 43 * SIZEOF_WORD], 5 ;E: w5 = 42 49 56 57 50 43 58 59 |
| pinsrw xmm5, word [block + 36 * SIZEOF_WORD], 6 ;E: w5 = 42 49 56 57 50 43 36 59 |
| pinsrw xmm5, word [block + 29 * SIZEOF_WORD], 7 ;E: w5 = 42 49 56 57 50 43 36 29 |
| ; (Row 4, offset 1) |
| %undef block |
| %define nbits edx |
| %define nbitsb dl |
| %define nbitsh dh |
| movzx nbits, byte [NBITS(code_temp)] ;Z: nbits = JPEG_NBITS(code_temp); |
| %undef code_temp |
| %define state esi |
| pxor xmm2, xmm2 ;E: w2[i] = 0; |
| mov state, [frame + arg_state] |
| movd mm_nbits, nbits ;Z: nbits --> MMX register |
| pcmpgtw xmm0, xmm5 ;E: w0[i] = (w5[i] < 0 ? -1 : 0); |
| movd mm_code, dword [dctbl + c_derived_tbl.ehufco + nbits * 4] |
| ;Z: code = dctbl->ehufco[nbits]; |
| %define size ecx |
| %define sizeb cl |
| %define sizeh ch |
| paddw xmm5, xmm0 ;E: w5[i] += w0[i]; |
| movaps XMMWORD [t + (32+1) * SIZEOF_WORD], xmm5 ;E: t[32+i] = w5[i]; |
| movzx size, byte [dctbl + c_derived_tbl.ehufsi + nbits] |
| ;Z: size = dctbl->ehufsi[nbits]; |
| %undef dctbl |
| pcmpeqw xmm5, xmm2 ;E: w5[i] = (w5[i] == 0 ? -1 : 0); |
| |
| packsswb xmm5, xmm1 ;EF: b5[i] = w5[i], b5[i+8] = w1[i] |
| ; w/ signed saturation |
| |
| movq mm_put_buffer, [state + working_state.cur.put_buffer.simd] |
| ;Z: put_buffer = state->cur.put_buffer.simd; |
| mov free_bits, [state + working_state.cur.free_bits] |
| ;Z: free_bits = state->cur.free_bits; |
| %undef state |
| %define actbl esi |
| mov actbl, [frame + arg_actbl] |
| %define buffer eax |
| mov buffer, [frame + arg_buffer] |
| %undef frame |
| jmp .BEGIN |
| |
| ; ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| |
| align 16 |
| ; size <= 32, so this is not really a loop |
| .BRLOOP1: ; .BRLOOP1: |
| movzx nbits, byte [actbl + c_derived_tbl.ehufsi + 0xf0] |
| ; nbits = actbl->ehufsi[0xf0]; |
| movd mm_code, dword [actbl + c_derived_tbl.ehufco + 0xf0 * 4] |
| ; code = actbl->ehufco[0xf0]; |
| and index, 0x7ffffff ; clear index if size == 32 |
| sub size, 16 ; size -= 16; |
| sub free_bits, nbits ; if ((free_bits -= nbits) <= 0) |
| jle .EMIT_BRLOOP1 ; goto .EMIT_BRLOOP1; |
| movd mm_nbits, nbits ; nbits --> MMX register |
| psllq mm_put_buffer, mm_nbits ; put_buffer <<= nbits; |
| por mm_put_buffer, mm_code ; put_buffer |= code; |
| jmp .ERLOOP1 ; goto .ERLOOP1; |
| |
| ; ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| |
| align 16 |
| %ifdef PIC |
| times 6 nop |
| %else |
| times 2 nop |
| %endif |
| .BLOOP1: ; do { /* size = # of zero bits/elements to skip */ |
| ; if size == 32, index remains unchanged. Correct in .BRLOOP. |
| shr index, sizeb ; index >>= size; |
| lea t, [t + size * SIZEOF_WORD] ; t += size; |
| cmp size, 16 ; if (size > 16) |
| jg .BRLOOP1 ; goto .BRLOOP1; |
| .ERLOOP1: ; .ERLOOP1: |
| movsx nbits, word [t] ; nbits = *t; |
| %ifdef PIC |
| add size, size ; size += size; |
| %else |
| lea size, [size * 2] ; size += size; |
| %endif |
| movd mm_temp, nbits ; temp = nbits; |
| movzx nbits, byte [NBITS(nbits)] ; nbits = JPEG_NBITS(nbits); |
| lea size, [size * 8 + nbits] ; size = size * 8 + nbits; |
| movd mm_nbits, nbits ; nbits --> MMX register |
| movd mm_code, dword [actbl + c_derived_tbl.ehufco + (size - 16) * 4] |
| ; code = actbl->ehufco[size-16]; |
| movzx size, byte [actbl + c_derived_tbl.ehufsi + (size - 16)] |
| ; size = actbl->ehufsi[size-16]; |
| .BEGIN: ; .BEGIN: |
| pand mm_temp, [MASK_BITS(nbits)] ; temp &= (1 << nbits) - 1; |
| psllq mm_code, mm_nbits ; code <<= nbits; |
| add nbits, size ; nbits += size; |
| por mm_code, mm_temp ; code |= temp; |
| sub free_bits, nbits ; if ((free_bits -= nbits) <= 0) |
| jle .EMIT_ERLOOP1 ; insert code, flush buffer, init size, goto .BLOOP1 |
| xor size, size ; size = 0; /* kill tzcnt input dependency */ |
| tzcnt size, index ; size = # of trailing 0 bits in index |
| movd mm_nbits, nbits ; nbits --> MMX register |
| psllq mm_put_buffer, mm_nbits ; put_buffer <<= nbits; |
| inc size ; ++size; |
| por mm_put_buffer, mm_code ; put_buffer |= code; |
| test index, index |
| jnz .BLOOP1 ; } while (index != 0); |
| ; Round 2 |
| ; t points to the last used word, possibly below t_ if the previous index had 32 zero bits. |
| .ELOOP1: ; .ELOOP1: |
| pmovmskb size, xmm4 ; size = 0; size |= ((b4[i] >> 7) << i); |
| pmovmskb index, xmm5 ; index = 0; index |= ((b5[i] >> 7) << i); |
| shl size, 16 ; size <<= 16; |
| or index, size ; index |= size; |
| not index ; index = ~index; |
| lea nbits, [t + (1 + DCTSIZE2) * SIZEOF_WORD] |
| ; nbits = t + 1 + 64; |
| and nbits, -DCTSIZE2 * SIZEOF_WORD ; nbits &= -128; /* now points to &t_[64] */ |
| sub nbits, t ; nbits -= t; |
| shr nbits, 1 ; nbits >>= 1; /* # of leading 0 bits in old index + 33 */ |
| tzcnt size, index ; size = # of trailing 0 bits in index |
| inc size ; ++size; |
| test index, index ; if (index == 0) |
| jz .ELOOP2 ; goto .ELOOP2; |
| ; NOTE: size == 32 cannot happen, since the last element is always 0. |
| shr index, sizeb ; index >>= size; |
| lea size, [size + nbits - 33] ; size = size + nbits - 33; |
| lea t, [t + size * SIZEOF_WORD] ; t += size; |
| cmp size, 16 ; if (size <= 16) |
| jle .ERLOOP2 ; goto .ERLOOP2; |
| .BRLOOP2: ; do { |
| movzx nbits, byte [actbl + c_derived_tbl.ehufsi + 0xf0] |
| ; nbits = actbl->ehufsi[0xf0]; |
| sub size, 16 ; size -= 16; |
| movd mm_code, dword [actbl + c_derived_tbl.ehufco + 0xf0 * 4] |
| ; code = actbl->ehufco[0xf0]; |
| sub free_bits, nbits ; if ((free_bits -= nbits) <= 0) |
| jle .EMIT_BRLOOP2 ; insert code and flush put_buffer |
| movd mm_nbits, nbits ; else { nbits --> MMX register |
| psllq mm_put_buffer, mm_nbits ; put_buffer <<= nbits; |
| por mm_put_buffer, mm_code ; put_buffer |= code; |
| cmp size, 16 ; if (size <= 16) |
| jle .ERLOOP2 ; goto .ERLOOP2; |
| jmp .BRLOOP2 ; } while (1); |
| |
| ; ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| |
| align 16 |
| .BLOOP2: ; do { /* size = # of zero bits/elements to skip */ |
| shr index, sizeb ; index >>= size; |
| lea t, [t + size * SIZEOF_WORD] ; t += size; |
| cmp size, 16 ; if (size > 16) |
| jg .BRLOOP2 ; goto .BRLOOP2; |
| .ERLOOP2: ; .ERLOOP2: |
| movsx nbits, word [t] ; nbits = *t; |
| add size, size ; size += size; |
| movd mm_temp, nbits ; temp = nbits; |
| movzx nbits, byte [NBITS(nbits)] ; nbits = JPEG_NBITS(nbits); |
| movd mm_nbits, nbits ; nbits --> MMX register |
| lea size, [size * 8 + nbits] ; size = size * 8 + nbits; |
| movd mm_code, dword [actbl + c_derived_tbl.ehufco + (size - 16) * 4] |
| ; code = actbl->ehufco[size-16]; |
| movzx size, byte [actbl + c_derived_tbl.ehufsi + (size - 16)] |
| ; size = actbl->ehufsi[size-16]; |
| psllq mm_code, mm_nbits ; code <<= nbits; |
| pand mm_temp, [MASK_BITS(nbits)] ; temp &= (1 << nbits) - 1; |
| lea nbits, [nbits + size] ; nbits += size; |
| por mm_code, mm_temp ; code |= temp; |
| xor size, size ; size = 0; /* kill tzcnt input dependency */ |
| sub free_bits, nbits ; if ((free_bits -= nbits) <= 0) |
| jle .EMIT_ERLOOP2 ; insert code, flush buffer, init size, goto .BLOOP2 |
| tzcnt size, index ; size = # of trailing 0 bits in index |
| movd mm_nbits, nbits ; nbits --> MMX register |
| psllq mm_put_buffer, mm_nbits ; put_buffer <<= nbits; |
| inc size ; ++size; |
| por mm_put_buffer, mm_code ; put_buffer |= code; |
| test index, index |
| jnz .BLOOP2 ; } while (index != 0); |
| .ELOOP2: ; .ELOOP2: |
| mov nbits, t ; nbits = t; |
| lea t, [t + SIZEOF_WORD] ; t = &t[1]; |
| and nbits, DCTSIZE2 * SIZEOF_WORD - 1 ; nbits &= 127; |
| and t, -DCTSIZE2 * SIZEOF_WORD ; t &= -128; /* t = &t_[0]; */ |
| cmp nbits, (DCTSIZE2 - 2) * SIZEOF_WORD ; if (nbits != 62 * 2) |
| je .EFN ; { |
| movd mm_code, dword [actbl + c_derived_tbl.ehufco + 0] |
| ; code = actbl->ehufco[0]; |
| movzx nbits, byte [actbl + c_derived_tbl.ehufsi + 0] |
| ; nbits = actbl->ehufsi[0]; |
| sub free_bits, nbits ; if ((free_bits -= nbits) <= 0) |
| jg .EFN_SKIP_EMIT_CODE ; { |
| EMIT_QWORD size, sizeb, sizeh, , , , , , .EFN ; insert code, flush put_buffer |
| align 16 |
| .EFN_SKIP_EMIT_CODE: ; } else { |
| movd mm_nbits, nbits ; nbits --> MMX register |
| psllq mm_put_buffer, mm_nbits ; put_buffer <<= nbits; |
| por mm_put_buffer, mm_code ; put_buffer |= code; |
| .EFN: ; } } |
| %define frame esp |
| mov frame, [t + save_frame] |
| %define state ecx |
| mov state, [frame + arg_state] |
| movq [state + working_state.cur.put_buffer.simd], mm_put_buffer |
| ; state->cur.put_buffer.simd = put_buffer; |
| emms |
| mov [state + working_state.cur.free_bits], free_bits |
| ; state->cur.free_bits = free_bits; |
| POP edi |
| POP esi |
| POP ebp |
| POP ebx |
| ret |
| |
| ; ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| |
| align 16 |
| .EMIT_BRLOOP1: |
| EMIT_QWORD emit_temp, emit_tempb, emit_temph, , , , , , \ |
| .ERLOOP1 |
| |
| ; ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| |
| align 16 |
| .EMIT_ERLOOP1: |
| EMIT_QWORD size, sizeb, sizeh, \ |
| { xor size, size }, \ |
| { tzcnt size, index }, \ |
| { inc size }, \ |
| { test index, index }, \ |
| { jnz .BLOOP1 }, \ |
| .ELOOP1 |
| |
| ; ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| |
| align 16 |
| .EMIT_BRLOOP2: |
| EMIT_QWORD emit_temp, emit_tempb, emit_temph, , , , \ |
| { cmp size, 16 }, \ |
| { jle .ERLOOP2 }, \ |
| .BRLOOP2 |
| |
| ; ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| |
| align 16 |
| .EMIT_ERLOOP2: |
| EMIT_QWORD size, sizeb, sizeh, \ |
| { xor size, size }, \ |
| { tzcnt size, index }, \ |
| { inc size }, \ |
| { test index, index }, \ |
| { jnz .BLOOP2 }, \ |
| .ELOOP2 |
| |
| ; For some reason, the OS X linker does not honor the request to align the |
| ; segment unless we do this. |
| align 32 |
