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583 lines
31 KiB
583 lines
31 KiB
;
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; jchuff-sse2.asm - Huffman entropy encoding (64-bit SSE2)
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;
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; Copyright (C) 2009-2011, 2014-2016, 2019, D. R. Commander.
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; Copyright (C) 2015, Matthieu Darbois.
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; Copyright (C) 2018, Matthias Räncker.
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;
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; Based on the x86 SIMD extension for IJG JPEG library
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; Copyright (C) 1999-2006, MIYASAKA Masaru.
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; For conditions of distribution and use, see copyright notice in jsimdext.inc
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;
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; This file should be assembled with NASM (Netwide Assembler),
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; can *not* be assembled with Microsoft's MASM or any compatible
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; assembler (including Borland's Turbo Assembler).
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; NASM is available from http://nasm.sourceforge.net/ or
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; http://sourceforge.net/project/showfiles.php?group_id=6208
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;
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; This file contains an SSE2 implementation for Huffman coding of one block.
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; The following code is based on jchuff.c; see jchuff.c for more details.
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%include "jsimdext.inc"
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struc working_state
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.next_output_byte: resp 1 ; => next byte to write in buffer
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.free_in_buffer: resp 1 ; # of byte spaces remaining in buffer
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.cur.put_buffer.simd resq 1 ; current bit accumulation buffer
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.cur.free_bits resd 1 ; # of bits available in it
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.cur.last_dc_val resd 4 ; last DC coef for each component
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.cinfo: resp 1 ; dump_buffer needs access to this
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endstruc
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struc c_derived_tbl
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.ehufco: resd 256 ; code for each symbol
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.ehufsi: resb 256 ; length of code for each symbol
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; If no code has been allocated for a symbol S, ehufsi[S] contains 0
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endstruc
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; --------------------------------------------------------------------------
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SECTION SEG_CONST
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alignz 32
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GLOBAL_DATA(jconst_huff_encode_one_block)
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EXTN(jconst_huff_encode_one_block):
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jpeg_mask_bits dd 0x0000, 0x0001, 0x0003, 0x0007
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dd 0x000f, 0x001f, 0x003f, 0x007f
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dd 0x00ff, 0x01ff, 0x03ff, 0x07ff
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dd 0x0fff, 0x1fff, 0x3fff, 0x7fff
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alignz 32
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times 1 << 14 db 15
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times 1 << 13 db 14
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times 1 << 12 db 13
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times 1 << 11 db 12
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times 1 << 10 db 11
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times 1 << 9 db 10
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times 1 << 8 db 9
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times 1 << 7 db 8
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times 1 << 6 db 7
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times 1 << 5 db 6
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times 1 << 4 db 5
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times 1 << 3 db 4
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times 1 << 2 db 3
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times 1 << 1 db 2
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times 1 << 0 db 1
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times 1 db 0
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jpeg_nbits_table:
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times 1 db 0
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times 1 << 0 db 1
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times 1 << 1 db 2
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times 1 << 2 db 3
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times 1 << 3 db 4
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times 1 << 4 db 5
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times 1 << 5 db 6
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times 1 << 6 db 7
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times 1 << 7 db 8
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times 1 << 8 db 9
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times 1 << 9 db 10
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times 1 << 10 db 11
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times 1 << 11 db 12
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times 1 << 12 db 13
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times 1 << 13 db 14
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times 1 << 14 db 15
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alignz 32
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%define NBITS(x) nbits_base + x
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%define MASK_BITS(x) NBITS((x) * 4) + (jpeg_mask_bits - jpeg_nbits_table)
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; --------------------------------------------------------------------------
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SECTION SEG_TEXT
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BITS 64
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; Shorthand used to describe SIMD operations:
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; wN: xmmN treated as eight signed 16-bit values
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; wN[i]: perform the same operation on all eight signed 16-bit values, i=0..7
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; bN: xmmN treated as 16 unsigned 8-bit values
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; bN[i]: perform the same operation on all 16 unsigned 8-bit values, i=0..15
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; Contents of SIMD registers are shown in memory order.
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; Fill the bit buffer to capacity with the leading bits from code, then output
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; the bit buffer and put the remaining bits from code into the bit buffer.
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;
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; Usage:
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; code - contains the bits to shift into the bit buffer (LSB-aligned)
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; %1 - the label to which to jump when the macro completes
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; %2 (optional) - extra instructions to execute after nbits has been set
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;
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; Upon completion, free_bits will be set to the number of remaining bits from
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; code, and put_buffer will contain those remaining bits. temp and code will
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; be clobbered.
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;
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; This macro encodes any 0xFF bytes as 0xFF 0x00, as does the EMIT_BYTE()
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; macro in jchuff.c.
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%macro EMIT_QWORD 1-2
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add nbitsb, free_bitsb ; nbits += free_bits;
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neg free_bitsb ; free_bits = -free_bits;
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mov tempd, code ; temp = code;
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shl put_buffer, nbitsb ; put_buffer <<= nbits;
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mov nbitsb, free_bitsb ; nbits = free_bits;
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neg free_bitsb ; free_bits = -free_bits;
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shr tempd, nbitsb ; temp >>= nbits;
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or tempq, put_buffer ; temp |= put_buffer;
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movq xmm0, tempq ; xmm0.u64 = { temp, 0 };
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bswap tempq ; temp = htonl(temp);
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mov put_buffer, codeq ; put_buffer = code;
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pcmpeqb xmm0, xmm1 ; b0[i] = (b0[i] == 0xFF ? 0xFF : 0);
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%2
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pmovmskb code, xmm0 ; code = 0; code |= ((b0[i] >> 7) << i);
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mov qword [buffer], tempq ; memcpy(buffer, &temp, 8);
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; (speculative; will be overwritten if
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; code contains any 0xFF bytes)
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add free_bitsb, 64 ; free_bits += 64;
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add bufferp, 8 ; buffer += 8;
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test code, code ; if (code == 0) /* No 0xFF bytes */
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jz %1 ; return;
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; Execute the equivalent of the EMIT_BYTE() macro in jchuff.c for all 8
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; bytes in the qword.
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cmp tempb, 0xFF ; Set CF if temp[0] < 0xFF
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mov byte [buffer-7], 0 ; buffer[-7] = 0;
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sbb bufferp, 6 ; buffer -= (6 + (temp[0] < 0xFF ? 1 : 0));
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mov byte [buffer], temph ; buffer[0] = temp[1];
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cmp temph, 0xFF ; Set CF if temp[1] < 0xFF
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mov byte [buffer+1], 0 ; buffer[1] = 0;
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sbb bufferp, -2 ; buffer -= (-2 + (temp[1] < 0xFF ? 1 : 0));
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shr tempq, 16 ; temp >>= 16;
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mov byte [buffer], tempb ; buffer[0] = temp[0];
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cmp tempb, 0xFF ; Set CF if temp[0] < 0xFF
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mov byte [buffer+1], 0 ; buffer[1] = 0;
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sbb bufferp, -2 ; buffer -= (-2 + (temp[0] < 0xFF ? 1 : 0));
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mov byte [buffer], temph ; buffer[0] = temp[1];
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cmp temph, 0xFF ; Set CF if temp[1] < 0xFF
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mov byte [buffer+1], 0 ; buffer[1] = 0;
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sbb bufferp, -2 ; buffer -= (-2 + (temp[1] < 0xFF ? 1 : 0));
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shr tempq, 16 ; temp >>= 16;
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mov byte [buffer], tempb ; buffer[0] = temp[0];
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cmp tempb, 0xFF ; Set CF if temp[0] < 0xFF
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mov byte [buffer+1], 0 ; buffer[1] = 0;
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sbb bufferp, -2 ; buffer -= (-2 + (temp[0] < 0xFF ? 1 : 0));
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mov byte [buffer], temph ; buffer[0] = temp[1];
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cmp temph, 0xFF ; Set CF if temp[1] < 0xFF
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mov byte [buffer+1], 0 ; buffer[1] = 0;
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sbb bufferp, -2 ; buffer -= (-2 + (temp[1] < 0xFF ? 1 : 0));
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shr tempd, 16 ; temp >>= 16;
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mov byte [buffer], tempb ; buffer[0] = temp[0];
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cmp tempb, 0xFF ; Set CF if temp[0] < 0xFF
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mov byte [buffer+1], 0 ; buffer[1] = 0;
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sbb bufferp, -2 ; buffer -= (-2 + (temp[0] < 0xFF ? 1 : 0));
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mov byte [buffer], temph ; buffer[0] = temp[1];
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cmp temph, 0xFF ; Set CF if temp[1] < 0xFF
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mov byte [buffer+1], 0 ; buffer[1] = 0;
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sbb bufferp, -2 ; buffer -= (-2 + (temp[1] < 0xFF ? 1 : 0));
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jmp %1 ; return;
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%endmacro
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;
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; Encode a single block's worth of coefficients.
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;
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; GLOBAL(JOCTET *)
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; jsimd_huff_encode_one_block_sse2(working_state *state, JOCTET *buffer,
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; JCOEFPTR block, int last_dc_val,
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; c_derived_tbl *dctbl, c_derived_tbl *actbl)
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;
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; NOTES:
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; When shuffling data, we try to avoid pinsrw as much as possible, since it is
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; slow on many CPUs. Its reciprocal throughput (issue latency) is 1 even on
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; modern CPUs, so chains of pinsrw instructions (even with different outputs)
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; can limit performance. pinsrw is a VectorPath instruction on AMD K8 and
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; requires 2 µops (with memory operand) on Intel. In either case, only one
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; pinsrw instruction can be decoded per cycle (and nothing else if they are
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; back-to-back), so out-of-order execution cannot be used to work around long
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; pinsrw chains (though for Sandy Bridge and later, this may be less of a
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; problem if the code runs from the µop cache.)
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;
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; We use tzcnt instead of bsf without checking for support. The instruction is
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; executed as bsf on CPUs that don't support tzcnt (encoding is equivalent to
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; rep bsf.) The destination (first) operand of bsf (and tzcnt on some CPUs) is
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; an input dependency (although the behavior is not formally defined, Intel
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; CPUs usually leave the destination unmodified if the source is zero.) This
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; can prevent out-of-order execution, so we clear the destination before
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; invoking tzcnt.
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;
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; Initial register allocation
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; rax - buffer
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; rbx - temp
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; rcx - nbits
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; rdx - block --> free_bits
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; rsi - nbits_base
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; rdi - t
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; rbp - code
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; r8 - dctbl --> code_temp
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; r9 - actbl
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; r10 - state
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; r11 - index
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; r12 - put_buffer
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%define buffer rax
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%ifdef WIN64
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%define bufferp rax
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%else
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%define bufferp raxp
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%endif
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%define tempq rbx
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%define tempd ebx
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%define tempb bl
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%define temph bh
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%define nbitsq rcx
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%define nbits ecx
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%define nbitsb cl
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%define block rdx
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%define nbits_base rsi
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%define t rdi
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%define td edi
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%define codeq rbp
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%define code ebp
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%define dctbl r8
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%define actbl r9
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%define state r10
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%define index r11
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%define indexd r11d
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%define put_buffer r12
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%define put_bufferd r12d
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; Step 1: Re-arrange input data according to jpeg_natural_order
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; xx 01 02 03 04 05 06 07 xx 01 08 16 09 02 03 10
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; 08 09 10 11 12 13 14 15 17 24 32 25 18 11 04 05
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; 16 17 18 19 20 21 22 23 12 19 26 33 40 48 41 34
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; 24 25 26 27 28 29 30 31 ==> 27 20 13 06 07 14 21 28
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; 32 33 34 35 36 37 38 39 35 42 49 56 57 50 43 36
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; 40 41 42 43 44 45 46 47 29 22 15 23 30 37 44 51
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; 48 49 50 51 52 53 54 55 58 59 52 45 38 31 39 46
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; 56 57 58 59 60 61 62 63 53 60 61 54 47 55 62 63
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align 32
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GLOBAL_FUNCTION(jsimd_huff_encode_one_block_sse2)
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EXTN(jsimd_huff_encode_one_block_sse2):
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%ifdef WIN64
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; rcx = working_state *state
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; rdx = JOCTET *buffer
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; r8 = JCOEFPTR block
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; r9 = int last_dc_val
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; [rax+48] = c_derived_tbl *dctbl
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; [rax+56] = c_derived_tbl *actbl
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;X: X = code stream
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mov buffer, rdx
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mov block, r8
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movups xmm3, XMMWORD [block + 0 * SIZEOF_WORD] ;D: w3 = xx 01 02 03 04 05 06 07
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push rbx
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push rbp
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movdqa xmm0, xmm3 ;A: w0 = xx 01 02 03 04 05 06 07
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push rsi
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push rdi
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push r12
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movups xmm1, XMMWORD [block + 8 * SIZEOF_WORD] ;B: w1 = 08 09 10 11 12 13 14 15
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mov state, rcx
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movsx code, word [block] ;Z: code = block[0];
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pxor xmm4, xmm4 ;A: w4[i] = 0;
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sub code, r9d ;Z: code -= last_dc_val;
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mov dctbl, POINTER [rsp+6*8+4*8]
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mov actbl, POINTER [rsp+6*8+5*8]
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punpckldq xmm0, xmm1 ;A: w0 = xx 01 08 09 02 03 10 11
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lea nbits_base, [rel jpeg_nbits_table]
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add rsp, -DCTSIZE2 * SIZEOF_WORD
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mov t, rsp
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%else
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; rdi = working_state *state
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; rsi = JOCTET *buffer
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; rdx = JCOEFPTR block
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; rcx = int last_dc_val
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; r8 = c_derived_tbl *dctbl
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; r9 = c_derived_tbl *actbl
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;X: X = code stream
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movups xmm3, XMMWORD [block + 0 * SIZEOF_WORD] ;D: w3 = xx 01 02 03 04 05 06 07
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push rbx
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push rbp
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movdqa xmm0, xmm3 ;A: w0 = xx 01 02 03 04 05 06 07
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push r12
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mov state, rdi
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mov buffer, rsi
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movups xmm1, XMMWORD [block + 8 * SIZEOF_WORD] ;B: w1 = 08 09 10 11 12 13 14 15
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movsx codeq, word [block] ;Z: code = block[0];
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lea nbits_base, [rel jpeg_nbits_table]
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pxor xmm4, xmm4 ;A: w4[i] = 0;
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sub codeq, rcx ;Z: code -= last_dc_val;
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punpckldq xmm0, xmm1 ;A: w0 = xx 01 08 09 02 03 10 11
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lea t, [rsp - DCTSIZE2 * SIZEOF_WORD] ; use red zone for t_
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%endif
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pshuflw xmm0, xmm0, 11001001b ;A: w0 = 01 08 xx 09 02 03 10 11
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pinsrw xmm0, word [block + 16 * SIZEOF_WORD], 2 ;A: w0 = 01 08 16 09 02 03 10 11
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punpckhdq xmm3, xmm1 ;D: w3 = 04 05 12 13 06 07 14 15
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punpcklqdq xmm1, xmm3 ;B: w1 = 08 09 10 11 04 05 12 13
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pinsrw xmm0, word [block + 17 * SIZEOF_WORD], 7 ;A: w0 = 01 08 16 09 02 03 10 17
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;A: (Row 0, offset 1)
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pcmpgtw xmm4, xmm0 ;A: w4[i] = (w0[i] < 0 ? -1 : 0);
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paddw xmm0, xmm4 ;A: w0[i] += w4[i];
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movaps XMMWORD [t + 0 * SIZEOF_WORD], xmm0 ;A: t[i] = w0[i];
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movq xmm2, qword [block + 24 * SIZEOF_WORD] ;B: w2 = 24 25 26 27 -- -- -- --
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pshuflw xmm2, xmm2, 11011000b ;B: w2 = 24 26 25 27 -- -- -- --
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pslldq xmm1, 1 * SIZEOF_WORD ;B: w1 = -- 08 09 10 11 04 05 12
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movups xmm5, XMMWORD [block + 48 * SIZEOF_WORD] ;H: w5 = 48 49 50 51 52 53 54 55
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movsd xmm1, xmm2 ;B: w1 = 24 26 25 27 11 04 05 12
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punpcklqdq xmm2, xmm5 ;C: w2 = 24 26 25 27 48 49 50 51
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pinsrw xmm1, word [block + 32 * SIZEOF_WORD], 1 ;B: w1 = 24 32 25 27 11 04 05 12
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pxor xmm4, xmm4 ;A: w4[i] = 0;
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psrldq xmm3, 2 * SIZEOF_WORD ;D: w3 = 12 13 06 07 14 15 -- --
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pcmpeqw xmm0, xmm4 ;A: w0[i] = (w0[i] == 0 ? -1 : 0);
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pinsrw xmm1, word [block + 18 * SIZEOF_WORD], 3 ;B: w1 = 24 32 25 18 11 04 05 12
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; (Row 1, offset 1)
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pcmpgtw xmm4, xmm1 ;B: w4[i] = (w1[i] < 0 ? -1 : 0);
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paddw xmm1, xmm4 ;B: w1[i] += w4[i];
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movaps XMMWORD [t + 8 * SIZEOF_WORD], xmm1 ;B: t[i+8] = w1[i];
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pxor xmm4, xmm4 ;B: w4[i] = 0;
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pcmpeqw xmm1, xmm4 ;B: w1[i] = (w1[i] == 0 ? -1 : 0);
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packsswb xmm0, xmm1 ;AB: b0[i] = w0[i], b0[i+8] = w1[i]
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; w/ signed saturation
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pinsrw xmm3, word [block + 20 * SIZEOF_WORD], 0 ;D: w3 = 20 13 06 07 14 15 -- --
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pinsrw xmm3, word [block + 21 * SIZEOF_WORD], 5 ;D: w3 = 20 13 06 07 14 21 -- --
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pinsrw xmm3, word [block + 28 * SIZEOF_WORD], 6 ;D: w3 = 20 13 06 07 14 21 28 --
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pinsrw xmm3, word [block + 35 * SIZEOF_WORD], 7 ;D: w3 = 20 13 06 07 14 21 28 35
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; (Row 3, offset 1)
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pcmpgtw xmm4, xmm3 ;D: w4[i] = (w3[i] < 0 ? -1 : 0);
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paddw xmm3, xmm4 ;D: w3[i] += w4[i];
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movaps XMMWORD [t + 24 * SIZEOF_WORD], xmm3 ;D: t[i+24] = w3[i];
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pxor xmm4, xmm4 ;D: w4[i] = 0;
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pcmpeqw xmm3, xmm4 ;D: w3[i] = (w3[i] == 0 ? -1 : 0);
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pinsrw xmm2, word [block + 19 * SIZEOF_WORD], 0 ;C: w2 = 19 26 25 27 48 49 50 51
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cmp code, 1 << 31 ;Z: Set CF if code < 0x80000000,
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;Z: i.e. if code is positive
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pinsrw xmm2, word [block + 33 * SIZEOF_WORD], 2 ;C: w2 = 19 26 33 27 48 49 50 51
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pinsrw xmm2, word [block + 40 * SIZEOF_WORD], 3 ;C: w2 = 19 26 33 40 48 49 50 51
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adc code, -1 ;Z: code += -1 + (code >= 0 ? 1 : 0);
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pinsrw xmm2, word [block + 41 * SIZEOF_WORD], 5 ;C: w2 = 19 26 33 40 48 41 50 51
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pinsrw xmm2, word [block + 34 * SIZEOF_WORD], 6 ;C: w2 = 19 26 33 40 48 41 34 51
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movsxd codeq, code ;Z: sign extend code
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pinsrw xmm2, word [block + 27 * SIZEOF_WORD], 7 ;C: w2 = 19 26 33 40 48 41 34 27
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; (Row 2, offset 1)
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pcmpgtw xmm4, xmm2 ;C: w4[i] = (w2[i] < 0 ? -1 : 0);
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paddw xmm2, xmm4 ;C: w2[i] += w4[i];
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movaps XMMWORD [t + 16 * SIZEOF_WORD], xmm2 ;C: t[i+16] = w2[i];
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pxor xmm4, xmm4 ;C: w4[i] = 0;
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pcmpeqw xmm2, xmm4 ;C: w2[i] = (w2[i] == 0 ? -1 : 0);
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packsswb xmm2, xmm3 ;CD: b2[i] = w2[i], b2[i+8] = w3[i]
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; w/ signed saturation
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movzx nbitsq, byte [NBITS(codeq)] ;Z: nbits = JPEG_NBITS(code);
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movdqa xmm3, xmm5 ;H: w3 = 48 49 50 51 52 53 54 55
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pmovmskb tempd, xmm2 ;Z: temp = 0; temp |= ((b2[i] >> 7) << i);
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pmovmskb put_bufferd, xmm0 ;Z: put_buffer = 0; put_buffer |= ((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 tempd, 16 ;Z: temp <<= 16;
|
|
psrldq xmm3, 1 * SIZEOF_WORD ;H: w3 = 53 60 61 54 55 62 63 --
|
|
pxor xmm2, xmm2 ;H: w2[i] = 0;
|
|
or put_bufferd, tempd ;Z: put_buffer |= temp;
|
|
pshuflw xmm3, xmm3, 00111001b ;H: w3 = 60 61 54 53 55 62 63 --
|
|
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;
|
|
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);
|
|
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
|
|
mov tempd, [dctbl + c_derived_tbl.ehufco + nbitsq * 4]
|
|
;Z: temp = dctbl->ehufco[nbits];
|
|
movdqa xmm1, xmm4 ;F: w1 = 36 37 44 45 38 39 46 47
|
|
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
|
|
and code, dword [MASK_BITS(nbitsq)] ;Z: code &= (1 << nbits) - 1;
|
|
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
|
|
shl tempq, nbitsb ;Z: temp <<= nbits;
|
|
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
|
|
pinsrw xmm4, word [block + 52 * SIZEOF_WORD], 1 ;G: w4 = 59 52 45 38 -- 39 46 --
|
|
or code, tempd ;Z: code |= temp;
|
|
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)
|
|
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];
|
|
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);
|
|
pinsrw xmm5, word [block + 42 * SIZEOF_WORD], 0 ;E: w5 = 42 49 56 57 50 51 58 59
|
|
|
|
packsswb xmm4, xmm3 ;GH: b4[i] = w4[i], b4[i+8] = w3[i]
|
|
; w/ signed saturation
|
|
|
|
pxor xmm0, xmm0 ;F: w0[i] = 0;
|
|
pinsrw xmm5, word [block + 43 * SIZEOF_WORD], 5 ;E: w5 = 42 49 56 57 50 43 58 59
|
|
pcmpgtw xmm2, xmm1 ;F: w2[i] = (w1[i] < 0 ? -1 : 0);
|
|
pmovmskb tempd, xmm4 ;Z: temp = 0; temp |= ((b4[i] >> 7) << i);
|
|
pinsrw xmm5, word [block + 36 * SIZEOF_WORD], 6 ;E: w5 = 42 49 56 57 50 43 36 59
|
|
paddw xmm1, xmm2 ;F: w1[i] += w2[i];
|
|
movaps XMMWORD [t + 40 * SIZEOF_WORD], xmm1 ;F: t[40+i] = w1[i];
|
|
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 free_bitsq rdx
|
|
%define free_bitsd edx
|
|
%define free_bitsb dl
|
|
pcmpeqw xmm1, xmm0 ;F: w1[i] = (w1[i] == 0 ? -1 : 0);
|
|
shl tempq, 48 ;Z: temp <<= 48;
|
|
pxor xmm2, xmm2 ;E: w2[i] = 0;
|
|
pcmpgtw xmm0, xmm5 ;E: w0[i] = (w5[i] < 0 ? -1 : 0);
|
|
paddw xmm5, xmm0 ;E: w5[i] += w0[i];
|
|
or tempq, put_buffer ;Z: temp |= put_buffer;
|
|
movaps XMMWORD [t + 32 * SIZEOF_WORD], xmm5 ;E: t[32+i] = w5[i];
|
|
lea t, [dword t - 2] ;Z: t = &t[-1];
|
|
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
|
|
|
|
add nbitsb, byte [dctbl + c_derived_tbl.ehufsi + nbitsq]
|
|
;Z: nbits += dctbl->ehufsi[nbits];
|
|
%undef dctbl
|
|
%define code_temp r8d
|
|
pmovmskb indexd, xmm5 ;Z: index = 0; index |= ((b5[i] >> 7) << i);
|
|
mov free_bitsd, [state+working_state.cur.free_bits]
|
|
;Z: free_bits = state->cur.free_bits;
|
|
pcmpeqw xmm1, xmm1 ;Z: b1[i] = 0xFF;
|
|
shl index, 32 ;Z: index <<= 32;
|
|
mov put_buffer, [state+working_state.cur.put_buffer.simd]
|
|
;Z: put_buffer = state->cur.put_buffer.simd;
|
|
or index, tempq ;Z: index |= temp;
|
|
not index ;Z: index = ~index;
|
|
sub free_bitsb, nbitsb ;Z: if ((free_bits -= nbits) >= 0)
|
|
jnl .ENTRY_SKIP_EMIT_CODE ;Z: goto .ENTRY_SKIP_EMIT_CODE;
|
|
align 16
|
|
.EMIT_CODE: ;Z: .EMIT_CODE:
|
|
EMIT_QWORD .BLOOP_COND ;Z: insert code, flush buffer, goto .BLOOP_COND
|
|
|
|
; ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
align 16
|
|
.BRLOOP: ; do {
|
|
lea code_temp, [nbitsq - 16] ; code_temp = nbits - 16;
|
|
movzx nbits, byte [actbl + c_derived_tbl.ehufsi + 0xf0]
|
|
; nbits = actbl->ehufsi[0xf0];
|
|
mov code, [actbl + c_derived_tbl.ehufco + 0xf0 * 4]
|
|
; code = actbl->ehufco[0xf0];
|
|
sub free_bitsb, nbitsb ; if ((free_bits -= nbits) <= 0)
|
|
jle .EMIT_BRLOOP_CODE ; goto .EMIT_BRLOOP_CODE;
|
|
shl put_buffer, nbitsb ; put_buffer <<= nbits;
|
|
mov nbits, code_temp ; nbits = code_temp;
|
|
or put_buffer, codeq ; put_buffer |= code;
|
|
cmp nbits, 16 ; if (nbits <= 16)
|
|
jle .ERLOOP ; break;
|
|
jmp .BRLOOP ; } while (1);
|
|
|
|
; ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
align 16
|
|
times 5 nop
|
|
.ENTRY_SKIP_EMIT_CODE: ; .ENTRY_SKIP_EMIT_CODE:
|
|
shl put_buffer, nbitsb ; put_buffer <<= nbits;
|
|
or put_buffer, codeq ; put_buffer |= code;
|
|
.BLOOP_COND: ; .BLOOP_COND:
|
|
test index, index ; if (index != 0)
|
|
jz .ELOOP ; {
|
|
.BLOOP: ; do {
|
|
xor nbits, nbits ; nbits = 0; /* kill tzcnt input dependency */
|
|
tzcnt nbitsq, index ; nbits = # of trailing 0 bits in index
|
|
inc nbits ; ++nbits;
|
|
lea t, [t + nbitsq * 2] ; t = &t[nbits];
|
|
shr index, nbitsb ; index >>= nbits;
|
|
.EMIT_BRLOOP_CODE_END: ; .EMIT_BRLOOP_CODE_END:
|
|
cmp nbits, 16 ; if (nbits > 16)
|
|
jg .BRLOOP ; goto .BRLOOP;
|
|
.ERLOOP: ; .ERLOOP:
|
|
movsx codeq, word [t] ; code = *t;
|
|
lea tempd, [nbitsq * 2] ; temp = nbits * 2;
|
|
movzx nbits, byte [NBITS(codeq)] ; nbits = JPEG_NBITS(code);
|
|
lea tempd, [nbitsq + tempq * 8] ; temp = temp * 8 + nbits;
|
|
mov code_temp, [actbl + c_derived_tbl.ehufco + (tempq - 16) * 4]
|
|
; code_temp = actbl->ehufco[temp-16];
|
|
shl code_temp, nbitsb ; code_temp <<= nbits;
|
|
and code, dword [MASK_BITS(nbitsq)] ; code &= (1 << nbits) - 1;
|
|
add nbitsb, [actbl + c_derived_tbl.ehufsi + (tempq - 16)]
|
|
; free_bits -= actbl->ehufsi[temp-16];
|
|
or code, code_temp ; code |= code_temp;
|
|
sub free_bitsb, nbitsb ; if ((free_bits -= nbits) <= 0)
|
|
jle .EMIT_CODE ; goto .EMIT_CODE;
|
|
shl put_buffer, nbitsb ; put_buffer <<= nbits;
|
|
or put_buffer, codeq ; put_buffer |= code;
|
|
test index, index
|
|
jnz .BLOOP ; } while (index != 0);
|
|
.ELOOP: ; } /* index != 0 */
|
|
sub td, esp ; t -= (WIN64: &t_[0], UNIX: &t_[64]);
|
|
%ifdef WIN64
|
|
cmp td, (DCTSIZE2 - 2) * SIZEOF_WORD ; if (t != 62)
|
|
%else
|
|
cmp td, -2 * SIZEOF_WORD ; if (t != -2)
|
|
%endif
|
|
je .EFN ; {
|
|
movzx nbits, byte [actbl + c_derived_tbl.ehufsi + 0]
|
|
; nbits = actbl->ehufsi[0];
|
|
mov code, [actbl + c_derived_tbl.ehufco + 0] ; code = actbl->ehufco[0];
|
|
sub free_bitsb, nbitsb ; if ((free_bits -= nbits) <= 0)
|
|
jg .EFN_SKIP_EMIT_CODE ; {
|
|
EMIT_QWORD .EFN ; insert code, flush buffer
|
|
align 16
|
|
.EFN_SKIP_EMIT_CODE: ; } else {
|
|
shl put_buffer, nbitsb ; put_buffer <<= nbits;
|
|
or put_buffer, codeq ; put_buffer |= code;
|
|
.EFN: ; } }
|
|
mov [state + working_state.cur.put_buffer.simd], put_buffer
|
|
; state->cur.put_buffer.simd = put_buffer;
|
|
mov byte [state + working_state.cur.free_bits], free_bitsb
|
|
; state->cur.free_bits = free_bits;
|
|
%ifdef WIN64
|
|
sub rsp, -DCTSIZE2 * SIZEOF_WORD
|
|
pop r12
|
|
pop rdi
|
|
pop rsi
|
|
pop rbp
|
|
pop rbx
|
|
%else
|
|
pop r12
|
|
pop rbp
|
|
pop rbx
|
|
%endif
|
|
ret
|
|
|
|
; ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
align 16
|
|
.EMIT_BRLOOP_CODE:
|
|
EMIT_QWORD .EMIT_BRLOOP_CODE_END, { mov nbits, code_temp }
|
|
; insert code, flush buffer,
|
|
; nbits = code_temp, goto .EMIT_BRLOOP_CODE_END
|
|
|
|
; For some reason, the OS X linker does not honor the request to align the
|
|
; segment unless we do this.
|
|
align 32
|