diff options
Diffstat (limited to 'media/libjpeg/simd/jchuff-sse2.asm')
-rw-r--r-- | media/libjpeg/simd/jchuff-sse2.asm | 426 |
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 |