summaryrefslogtreecommitdiff
path: root/media/libjpeg/simd/jchuff-sse2.asm
diff options
context:
space:
mode:
Diffstat (limited to 'media/libjpeg/simd/jchuff-sse2.asm')
-rw-r--r--media/libjpeg/simd/jchuff-sse2.asm426
1 files changed, 0 insertions, 426 deletions
diff --git a/media/libjpeg/simd/jchuff-sse2.asm b/media/libjpeg/simd/jchuff-sse2.asm
deleted file mode 100644
index 36d1f2db66..0000000000
--- a/media/libjpeg/simd/jchuff-sse2.asm
+++ /dev/null
@@ -1,426 +0,0 @@
-;
-; jchuff-sse2.asm - Huffman entropy encoding (SSE2)
-;
-; Copyright (C) 2009-2011, 2014-2016, D. R. Commander.
-; Copyright (C) 2015, Matthieu Darbois.
-;
-; 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 directly on jchuff.c; see jchuff.c for more
-; details.
-;
-; [TAB8]
-
-%include "jsimdext.inc"
-
-; --------------------------------------------------------------------------
- SECTION SEG_CONST
-
- alignz 16
- global EXTN(jconst_huff_encode_one_block)
-
-EXTN(jconst_huff_encode_one_block):
-
-%include "jpeg_nbits_table.inc"
-
- alignz 16
-
-; --------------------------------------------------------------------------
- SECTION SEG_TEXT
- BITS 32
-
-; These macros perform the same task as the emit_bits() function in the
-; original libjpeg code. In addition to reducing overhead by explicitly
-; inlining the code, additional performance is achieved by taking into
-; account the size of the bit buffer and waiting until it is almost full
-; before emptying it. This mostly benefits 64-bit platforms, since 6
-; bytes can be stored in a 64-bit bit buffer before it has to be emptied.
-
-%macro EMIT_BYTE 0
- sub put_bits, 8 ; put_bits -= 8;
- mov edx, put_buffer
- mov ecx, put_bits
- shr edx, cl ; c = (JOCTET)GETJOCTET(put_buffer >> put_bits);
- mov byte [eax], dl ; *buffer++ = c;
- add eax, 1
- cmp dl, 0xFF ; need to stuff a zero byte?
- jne %%.EMIT_BYTE_END
- mov byte [eax], 0 ; *buffer++ = 0;
- add eax, 1
-%%.EMIT_BYTE_END:
-%endmacro
-
-%macro PUT_BITS 1
- add put_bits, ecx ; put_bits += size;
- shl put_buffer, cl ; put_buffer = (put_buffer << size);
- or put_buffer, %1
-%endmacro
-
-%macro CHECKBUF15 0
- cmp put_bits, 16 ; if (put_bits > 31) {
- jl %%.CHECKBUF15_END
- mov eax, POINTER [esp+buffer]
- EMIT_BYTE
- EMIT_BYTE
- mov POINTER [esp+buffer], eax
-%%.CHECKBUF15_END:
-%endmacro
-
-%macro EMIT_BITS 1
- PUT_BITS %1
- CHECKBUF15
-%endmacro
-
-%macro kloop_prepare 37 ;(ko, jno0, ..., jno31, xmm0, xmm1, xmm2, xmm3)
- pxor xmm4, xmm4 ; __m128i neg = _mm_setzero_si128();
- pxor xmm5, xmm5 ; __m128i neg = _mm_setzero_si128();
- pxor xmm6, xmm6 ; __m128i neg = _mm_setzero_si128();
- pxor xmm7, xmm7 ; __m128i neg = _mm_setzero_si128();
- pinsrw %34, word [esi + %2 * SIZEOF_WORD], 0 ; xmm_shadow[0] = block[jno0];
- pinsrw %35, word [esi + %10 * SIZEOF_WORD], 0 ; xmm_shadow[8] = block[jno8];
- pinsrw %36, word [esi + %18 * SIZEOF_WORD], 0 ; xmm_shadow[16] = block[jno16];
- pinsrw %37, word [esi + %26 * SIZEOF_WORD], 0 ; xmm_shadow[24] = block[jno24];
- pinsrw %34, word [esi + %3 * SIZEOF_WORD], 1 ; xmm_shadow[1] = block[jno1];
- pinsrw %35, word [esi + %11 * SIZEOF_WORD], 1 ; xmm_shadow[9] = block[jno9];
- pinsrw %36, word [esi + %19 * SIZEOF_WORD], 1 ; xmm_shadow[17] = block[jno17];
- pinsrw %37, word [esi + %27 * SIZEOF_WORD], 1 ; xmm_shadow[25] = block[jno25];
- pinsrw %34, word [esi + %4 * SIZEOF_WORD], 2 ; xmm_shadow[2] = block[jno2];
- pinsrw %35, word [esi + %12 * SIZEOF_WORD], 2 ; xmm_shadow[10] = block[jno10];
- pinsrw %36, word [esi + %20 * SIZEOF_WORD], 2 ; xmm_shadow[18] = block[jno18];
- pinsrw %37, word [esi + %28 * SIZEOF_WORD], 2 ; xmm_shadow[26] = block[jno26];
- pinsrw %34, word [esi + %5 * SIZEOF_WORD], 3 ; xmm_shadow[3] = block[jno3];
- pinsrw %35, word [esi + %13 * SIZEOF_WORD], 3 ; xmm_shadow[11] = block[jno11];
- pinsrw %36, word [esi + %21 * SIZEOF_WORD], 3 ; xmm_shadow[19] = block[jno19];
- pinsrw %37, word [esi + %29 * SIZEOF_WORD], 3 ; xmm_shadow[27] = block[jno27];
- pinsrw %34, word [esi + %6 * SIZEOF_WORD], 4 ; xmm_shadow[4] = block[jno4];
- pinsrw %35, word [esi + %14 * SIZEOF_WORD], 4 ; xmm_shadow[12] = block[jno12];
- pinsrw %36, word [esi + %22 * SIZEOF_WORD], 4 ; xmm_shadow[20] = block[jno20];
- pinsrw %37, word [esi + %30 * SIZEOF_WORD], 4 ; xmm_shadow[28] = block[jno28];
- pinsrw %34, word [esi + %7 * SIZEOF_WORD], 5 ; xmm_shadow[5] = block[jno5];
- pinsrw %35, word [esi + %15 * SIZEOF_WORD], 5 ; xmm_shadow[13] = block[jno13];
- pinsrw %36, word [esi + %23 * SIZEOF_WORD], 5 ; xmm_shadow[21] = block[jno21];
- pinsrw %37, word [esi + %31 * SIZEOF_WORD], 5 ; xmm_shadow[29] = block[jno29];
- pinsrw %34, word [esi + %8 * SIZEOF_WORD], 6 ; xmm_shadow[6] = block[jno6];
- pinsrw %35, word [esi + %16 * SIZEOF_WORD], 6 ; xmm_shadow[14] = block[jno14];
- pinsrw %36, word [esi + %24 * SIZEOF_WORD], 6 ; xmm_shadow[22] = block[jno22];
- pinsrw %37, word [esi + %32 * SIZEOF_WORD], 6 ; xmm_shadow[30] = block[jno30];
- pinsrw %34, word [esi + %9 * SIZEOF_WORD], 7 ; xmm_shadow[7] = block[jno7];
- pinsrw %35, word [esi + %17 * SIZEOF_WORD], 7 ; xmm_shadow[15] = block[jno15];
- pinsrw %36, word [esi + %25 * SIZEOF_WORD], 7 ; xmm_shadow[23] = block[jno23];
-%if %1 != 32
- pinsrw %37, word [esi + %33 * SIZEOF_WORD], 7 ; xmm_shadow[31] = block[jno31];
-%else
- pinsrw %37, ecx, 7 ; xmm_shadow[31] = block[jno31];
-%endif
- pcmpgtw xmm4, %34 ; neg = _mm_cmpgt_epi16(neg, x1);
- pcmpgtw xmm5, %35 ; neg = _mm_cmpgt_epi16(neg, x1);
- pcmpgtw xmm6, %36 ; neg = _mm_cmpgt_epi16(neg, x1);
- pcmpgtw xmm7, %37 ; neg = _mm_cmpgt_epi16(neg, x1);
- paddw %34, xmm4 ; x1 = _mm_add_epi16(x1, neg);
- paddw %35, xmm5 ; x1 = _mm_add_epi16(x1, neg);
- paddw %36, xmm6 ; x1 = _mm_add_epi16(x1, neg);
- paddw %37, xmm7 ; x1 = _mm_add_epi16(x1, neg);
- pxor %34, xmm4 ; x1 = _mm_xor_si128(x1, neg);
- pxor %35, xmm5 ; x1 = _mm_xor_si128(x1, neg);
- pxor %36, xmm6 ; x1 = _mm_xor_si128(x1, neg);
- pxor %37, xmm7 ; x1 = _mm_xor_si128(x1, neg);
- pxor xmm4, %34 ; neg = _mm_xor_si128(neg, x1);
- pxor xmm5, %35 ; neg = _mm_xor_si128(neg, x1);
- pxor xmm6, %36 ; neg = _mm_xor_si128(neg, x1);
- pxor xmm7, %37 ; neg = _mm_xor_si128(neg, x1);
- movdqa XMMWORD [esp + t1 + %1 * SIZEOF_WORD], %34 ; _mm_storeu_si128((__m128i *)(t1 + ko), x1);
- movdqa XMMWORD [esp + t1 + (%1 + 8) * SIZEOF_WORD], %35 ; _mm_storeu_si128((__m128i *)(t1 + ko + 8), x1);
- movdqa XMMWORD [esp + t1 + (%1 + 16) * SIZEOF_WORD], %36 ; _mm_storeu_si128((__m128i *)(t1 + ko + 16), x1);
- movdqa XMMWORD [esp + t1 + (%1 + 24) * SIZEOF_WORD], %37 ; _mm_storeu_si128((__m128i *)(t1 + ko + 24), x1);
- movdqa XMMWORD [esp + t2 + %1 * SIZEOF_WORD], xmm4 ; _mm_storeu_si128((__m128i *)(t2 + ko), neg);
- movdqa XMMWORD [esp + t2 + (%1 + 8) * SIZEOF_WORD], xmm5 ; _mm_storeu_si128((__m128i *)(t2 + ko + 8), neg);
- movdqa XMMWORD [esp + t2 + (%1 + 16) * SIZEOF_WORD], xmm6 ; _mm_storeu_si128((__m128i *)(t2 + ko + 16), neg);
- movdqa XMMWORD [esp + t2 + (%1 + 24) * SIZEOF_WORD], xmm7 ; _mm_storeu_si128((__m128i *)(t2 + ko + 24), neg);
-%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)
-;
-
-; eax + 8 = working_state *state
-; eax + 12 = JOCTET *buffer
-; eax + 16 = JCOEFPTR block
-; eax + 20 = int last_dc_val
-; eax + 24 = c_derived_tbl *dctbl
-; eax + 28 = c_derived_tbl *actbl
-
-%define pad 6*SIZEOF_DWORD ; Align to 16 bytes
-%define t1 pad
-%define t2 t1+(DCTSIZE2*SIZEOF_WORD)
-%define block t2+(DCTSIZE2*SIZEOF_WORD)
-%define actbl block+SIZEOF_DWORD
-%define buffer actbl+SIZEOF_DWORD
-%define temp buffer+SIZEOF_DWORD
-%define temp2 temp+SIZEOF_DWORD
-%define temp3 temp2+SIZEOF_DWORD
-%define temp4 temp3+SIZEOF_DWORD
-%define temp5 temp4+SIZEOF_DWORD
-%define gotptr temp5+SIZEOF_DWORD ; void *gotptr
-%define put_buffer ebx
-%define put_bits edi
-
- align 16
- global EXTN(jsimd_huff_encode_one_block_sse2)
-
-EXTN(jsimd_huff_encode_one_block_sse2):
- push ebp
- mov eax,esp ; eax = original ebp
- sub esp, byte 4
- and esp, byte (-SIZEOF_XMMWORD) ; align to 128 bits
- mov [esp],eax
- mov ebp,esp ; ebp = aligned ebp
- sub esp, temp5+9*SIZEOF_DWORD-pad
- push ebx
- push ecx
-; push edx ; need not be preserved
- push esi
- push edi
- push ebp
-
- mov esi, POINTER [eax+8] ; (working_state *state)
- mov put_buffer, DWORD [esi+8] ; put_buffer = state->cur.put_buffer;
- mov put_bits, DWORD [esi+12] ; put_bits = state->cur.put_bits;
- push esi ; esi is now scratch
-
- get_GOT edx ; get GOT address
- movpic POINTER [esp+gotptr], edx ; save GOT address
-
- mov ecx, POINTER [eax+28]
- mov edx, POINTER [eax+16]
- mov esi, POINTER [eax+12]
- mov POINTER [esp+actbl], ecx
- mov POINTER [esp+block], edx
- mov POINTER [esp+buffer], esi
-
- ; Encode the DC coefficient difference per section F.1.2.1
- mov esi, POINTER [esp+block] ; block
- movsx ecx, word [esi] ; temp = temp2 = block[0] - last_dc_val;
- sub ecx, DWORD [eax+20]
- mov esi, ecx
-
- ; This is a well-known technique for obtaining the absolute value
- ; without a branch. It is derived from an assembly language technique
- ; presented in "How to Optimize for the Pentium Processors",
- ; Copyright (c) 1996, 1997 by Agner Fog.
- mov edx, ecx
- sar edx, 31 ; temp3 = temp >> (CHAR_BIT * sizeof(int) - 1);
- xor ecx, edx ; temp ^= temp3;
- sub ecx, edx ; temp -= temp3;
-
- ; For a negative input, want temp2 = bitwise complement of abs(input)
- ; This code assumes we are on a two's complement machine
- add esi, edx ; temp2 += temp3;
- mov DWORD [esp+temp], esi ; backup temp2 in temp
-
- ; Find the number of bits needed for the magnitude of the coefficient
- movpic ebp, POINTER [esp+gotptr] ; load GOT address (ebp)
- movzx edx, byte [GOTOFF(ebp, jpeg_nbits_table + ecx)] ; nbits = JPEG_NBITS(temp);
- mov DWORD [esp+temp2], edx ; backup nbits in temp2
-
- ; Emit the Huffman-coded symbol for the number of bits
- mov ebp, POINTER [eax+24] ; After this point, arguments are not accessible anymore
- mov eax, INT [ebp + edx * 4] ; code = dctbl->ehufco[nbits];
- movzx ecx, byte [ebp + edx + 1024] ; size = dctbl->ehufsi[nbits];
- EMIT_BITS eax ; EMIT_BITS(code, size)
-
- mov ecx, DWORD [esp+temp2] ; restore nbits
-
- ; Mask off any extra bits in code
- mov eax, 1
- shl eax, cl
- dec eax
- and eax, DWORD [esp+temp] ; temp2 &= (((JLONG) 1)<<nbits) - 1;
-
- ; Emit that number of bits of the value, if positive,
- ; or the complement of its magnitude, if negative.
- EMIT_BITS eax ; EMIT_BITS(temp2, nbits)
-
- ; Prepare data
- xor ecx, ecx
- mov esi, POINTER [esp+block]
- kloop_prepare 0, 1, 8, 16, 9, 2, 3, 10, 17, 24, 32, 25, \
- 18, 11, 4, 5, 12, 19, 26, 33, 40, 48, 41, 34, \
- 27, 20, 13, 6, 7, 14, 21, 28, 35, \
- xmm0, xmm1, xmm2, xmm3
- kloop_prepare 32, 42, 49, 56, 57, 50, 43, 36, 29, 22, 15, 23, \
- 30, 37, 44, 51, 58, 59, 52, 45, 38, 31, 39, 46, \
- 53, 60, 61, 54, 47, 55, 62, 63, 63, \
- xmm0, xmm1, xmm2, xmm3
-
- pxor xmm7, xmm7
- movdqa xmm0, XMMWORD [esp + t1 + 0 * SIZEOF_WORD] ; __m128i tmp0 = _mm_loadu_si128((__m128i *)(t1 + 0));
- movdqa xmm1, XMMWORD [esp + t1 + 8 * SIZEOF_WORD] ; __m128i tmp1 = _mm_loadu_si128((__m128i *)(t1 + 8));
- movdqa xmm2, XMMWORD [esp + t1 + 16 * SIZEOF_WORD] ; __m128i tmp2 = _mm_loadu_si128((__m128i *)(t1 + 16));
- movdqa xmm3, XMMWORD [esp + t1 + 24 * SIZEOF_WORD] ; __m128i tmp3 = _mm_loadu_si128((__m128i *)(t1 + 24));
- pcmpeqw xmm0, xmm7 ; tmp0 = _mm_cmpeq_epi16(tmp0, zero);
- pcmpeqw xmm1, xmm7 ; tmp1 = _mm_cmpeq_epi16(tmp1, zero);
- pcmpeqw xmm2, xmm7 ; tmp2 = _mm_cmpeq_epi16(tmp2, zero);
- pcmpeqw xmm3, xmm7 ; tmp3 = _mm_cmpeq_epi16(tmp3, zero);
- packsswb xmm0, xmm1 ; tmp0 = _mm_packs_epi16(tmp0, tmp1);
- packsswb xmm2, xmm3 ; tmp2 = _mm_packs_epi16(tmp2, tmp3);
- pmovmskb edx, xmm0 ; index = ((uint64_t)_mm_movemask_epi8(tmp0)) << 0;
- pmovmskb ecx, xmm2 ; index = ((uint64_t)_mm_movemask_epi8(tmp2)) << 16;
- shl ecx, 16
- or edx, ecx
- not edx ; index = ~index;
-
- lea esi, [esp+t1]
- mov ebp, POINTER [esp+actbl] ; ebp = actbl
-
-.BLOOP:
- bsf ecx, edx ; r = __builtin_ctzl(index);
- jz .ELOOP
- lea esi, [esi+ecx*2] ; k += r;
- shr edx, cl ; index >>= r;
- mov DWORD [esp+temp3], edx
-.BRLOOP:
- cmp ecx, 16 ; while (r > 15) {
- jl .ERLOOP
- sub ecx, 16 ; r -= 16;
- mov DWORD [esp+temp], ecx
- mov eax, INT [ebp + 240 * 4] ; code_0xf0 = actbl->ehufco[0xf0];
- movzx ecx, byte [ebp + 1024 + 240] ; size_0xf0 = actbl->ehufsi[0xf0];
- EMIT_BITS eax ; EMIT_BITS(code_0xf0, size_0xf0)
- mov ecx, DWORD [esp+temp]
- jmp .BRLOOP
-.ERLOOP:
- movsx eax, word [esi] ; temp = t1[k];
- movpic edx, POINTER [esp+gotptr] ; load GOT address (edx)
- movzx eax, byte [GOTOFF(edx, jpeg_nbits_table + eax)] ; nbits = JPEG_NBITS(temp);
- mov DWORD [esp+temp2], eax
- ; Emit Huffman symbol for run length / number of bits
- shl ecx, 4 ; temp3 = (r << 4) + nbits;
- add ecx, eax
- mov eax, INT [ebp + ecx * 4] ; code = actbl->ehufco[temp3];
- movzx ecx, byte [ebp + ecx + 1024] ; size = actbl->ehufsi[temp3];
- EMIT_BITS eax
-
- movsx edx, word [esi+DCTSIZE2*2] ; temp2 = t2[k];
- ; Mask off any extra bits in code
- mov ecx, DWORD [esp+temp2]
- mov eax, 1
- shl eax, cl
- dec eax
- and eax, edx ; temp2 &= (((JLONG) 1)<<nbits) - 1;
- EMIT_BITS eax ; PUT_BITS(temp2, nbits)
- mov edx, DWORD [esp+temp3]
- add esi, 2 ; ++k;
- shr edx, 1 ; index >>= 1;
-
- jmp .BLOOP
-.ELOOP:
- movdqa xmm0, XMMWORD [esp + t1 + 32 * SIZEOF_WORD] ; __m128i tmp0 = _mm_loadu_si128((__m128i *)(t1 + 0));
- movdqa xmm1, XMMWORD [esp + t1 + 40 * SIZEOF_WORD] ; __m128i tmp1 = _mm_loadu_si128((__m128i *)(t1 + 8));
- movdqa xmm2, XMMWORD [esp + t1 + 48 * SIZEOF_WORD] ; __m128i tmp2 = _mm_loadu_si128((__m128i *)(t1 + 16));
- movdqa xmm3, XMMWORD [esp + t1 + 56 * SIZEOF_WORD] ; __m128i tmp3 = _mm_loadu_si128((__m128i *)(t1 + 24));
- pcmpeqw xmm0, xmm7 ; tmp0 = _mm_cmpeq_epi16(tmp0, zero);
- pcmpeqw xmm1, xmm7 ; tmp1 = _mm_cmpeq_epi16(tmp1, zero);
- pcmpeqw xmm2, xmm7 ; tmp2 = _mm_cmpeq_epi16(tmp2, zero);
- pcmpeqw xmm3, xmm7 ; tmp3 = _mm_cmpeq_epi16(tmp3, zero);
- packsswb xmm0, xmm1 ; tmp0 = _mm_packs_epi16(tmp0, tmp1);
- packsswb xmm2, xmm3 ; tmp2 = _mm_packs_epi16(tmp2, tmp3);
- pmovmskb edx, xmm0 ; index = ((uint64_t)_mm_movemask_epi8(tmp0)) << 0;
- pmovmskb ecx, xmm2 ; index = ((uint64_t)_mm_movemask_epi8(tmp2)) << 16;
- shl ecx, 16
- or edx, ecx
- not edx ; index = ~index;
-
- lea eax, [esp + t1 + (DCTSIZE2/2) * 2]
- sub eax, esi
- shr eax, 1
- bsf ecx, edx ; r = __builtin_ctzl(index);
- jz .ELOOP2
- shr edx, cl ; index >>= r;
- add ecx, eax
- lea esi, [esi+ecx*2] ; k += r;
- mov DWORD [esp+temp3], edx
- jmp .BRLOOP2
-.BLOOP2:
- bsf ecx, edx ; r = __builtin_ctzl(index);
- jz .ELOOP2
- lea esi, [esi+ecx*2] ; k += r;
- shr edx, cl ; index >>= r;
- mov DWORD [esp+temp3], edx
-.BRLOOP2:
- cmp ecx, 16 ; while (r > 15) {
- jl .ERLOOP2
- sub ecx, 16 ; r -= 16;
- mov DWORD [esp+temp], ecx
- mov eax, INT [ebp + 240 * 4] ; code_0xf0 = actbl->ehufco[0xf0];
- movzx ecx, byte [ebp + 1024 + 240] ; size_0xf0 = actbl->ehufsi[0xf0];
- EMIT_BITS eax ; EMIT_BITS(code_0xf0, size_0xf0)
- mov ecx, DWORD [esp+temp]
- jmp .BRLOOP2
-.ERLOOP2:
- movsx eax, word [esi] ; temp = t1[k];
- bsr eax, eax ; nbits = 32 - __builtin_clz(temp);
- inc eax
- mov DWORD [esp+temp2], eax
- ; Emit Huffman symbol for run length / number of bits
- shl ecx, 4 ; temp3 = (r << 4) + nbits;
- add ecx, eax
- mov eax, INT [ebp + ecx * 4] ; code = actbl->ehufco[temp3];
- movzx ecx, byte [ebp + ecx + 1024] ; size = actbl->ehufsi[temp3];
- EMIT_BITS eax
-
- movsx edx, word [esi+DCTSIZE2*2] ; temp2 = t2[k];
- ; Mask off any extra bits in code
- mov ecx, DWORD [esp+temp2]
- mov eax, 1
- shl eax, cl
- dec eax
- and eax, edx ; temp2 &= (((JLONG) 1)<<nbits) - 1;
- EMIT_BITS eax ; PUT_BITS(temp2, nbits)
- mov edx, DWORD [esp+temp3]
- add esi, 2 ; ++k;
- shr edx, 1 ; index >>= 1;
-
- jmp .BLOOP2
-.ELOOP2:
- ; If the last coef(s) were zero, emit an end-of-block code
- lea edx, [esp + t1 + (DCTSIZE2-1) * 2] ; r = DCTSIZE2-1-k;
- cmp edx, esi ; if (r > 0) {
- je .EFN
- mov eax, INT [ebp] ; code = actbl->ehufco[0];
- movzx ecx, byte [ebp + 1024] ; size = actbl->ehufsi[0];
- EMIT_BITS eax
-.EFN:
- mov eax, [esp+buffer]
- pop esi
- ; Save put_buffer & put_bits
- mov DWORD [esi+8], put_buffer ; state->cur.put_buffer = put_buffer;
- mov DWORD [esi+12], put_bits ; state->cur.put_bits = put_bits;
-
- pop ebp
- pop edi
- pop esi
-; pop edx ; need not be preserved
- pop ecx
- pop ebx
- mov esp,ebp ; esp <- aligned ebp
- pop esp ; esp <- original ebp
- pop ebp
- ret
-
-; For some reason, the OS X linker does not honor the request to align the
-; segment unless we do this.
- align 16