| ; |
| ; jfdctfst.asm - fast integer FDCT (64-bit SSE2) |
| ; |
| ; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB |
| ; Copyright (C) 2009, 2016, D. R. Commander. |
| ; |
| ; 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 a fast, not so accurate integer implementation of |
| ; the forward DCT (Discrete Cosine Transform). The following code is |
| ; based directly on the IJG's original jfdctfst.c; see the jfdctfst.c |
| ; for more details. |
| ; |
| ; [TAB8] |
| |
| %include "jsimdext.inc" |
| %include "jdct.inc" |
| |
| ; -------------------------------------------------------------------------- |
| |
| %define CONST_BITS 8 ; 14 is also OK. |
| |
| %if CONST_BITS == 8 |
| F_0_382 equ 98 ; FIX(0.382683433) |
| F_0_541 equ 139 ; FIX(0.541196100) |
| F_0_707 equ 181 ; FIX(0.707106781) |
| F_1_306 equ 334 ; FIX(1.306562965) |
| %else |
| ; NASM cannot do compile-time arithmetic on floating-point constants. |
| %define DESCALE(x, n) (((x) + (1 << ((n) - 1))) >> (n)) |
| F_0_382 equ DESCALE( 410903207, 30 - CONST_BITS) ; FIX(0.382683433) |
| F_0_541 equ DESCALE( 581104887, 30 - CONST_BITS) ; FIX(0.541196100) |
| F_0_707 equ DESCALE( 759250124, 30 - CONST_BITS) ; FIX(0.707106781) |
| F_1_306 equ DESCALE(1402911301, 30 - CONST_BITS) ; FIX(1.306562965) |
| %endif |
| |
| ; -------------------------------------------------------------------------- |
| SECTION SEG_CONST |
| |
| ; PRE_MULTIPLY_SCALE_BITS <= 2 (to avoid overflow) |
| ; CONST_BITS + CONST_SHIFT + PRE_MULTIPLY_SCALE_BITS == 16 (for pmulhw) |
| |
| %define PRE_MULTIPLY_SCALE_BITS 2 |
| %define CONST_SHIFT (16 - PRE_MULTIPLY_SCALE_BITS - CONST_BITS) |
| |
| alignz 32 |
| GLOBAL_DATA(jconst_fdct_ifast_sse2) |
| |
| EXTN(jconst_fdct_ifast_sse2): |
| |
| PW_F0707 times 8 dw F_0_707 << CONST_SHIFT |
| PW_F0382 times 8 dw F_0_382 << CONST_SHIFT |
| PW_F0541 times 8 dw F_0_541 << CONST_SHIFT |
| PW_F1306 times 8 dw F_1_306 << CONST_SHIFT |
| |
| alignz 32 |
| |
| ; -------------------------------------------------------------------------- |
| SECTION SEG_TEXT |
| BITS 64 |
| ; |
| ; Perform the forward DCT on one block of samples. |
| ; |
| ; GLOBAL(void) |
| ; jsimd_fdct_ifast_sse2(DCTELEM *data) |
| ; |
| |
| ; r10 = DCTELEM *data |
| |
| %define wk(i) rbp - (WK_NUM - (i)) * SIZEOF_XMMWORD ; xmmword wk[WK_NUM] |
| %define WK_NUM 2 |
| |
| align 32 |
| GLOBAL_FUNCTION(jsimd_fdct_ifast_sse2) |
| |
| EXTN(jsimd_fdct_ifast_sse2): |
| push rbp |
| mov rax, rsp ; rax = original rbp |
| sub rsp, byte 4 |
| and rsp, byte (-SIZEOF_XMMWORD) ; align to 128 bits |
| mov [rsp], rax |
| mov rbp, rsp ; rbp = aligned rbp |
| lea rsp, [wk(0)] |
| collect_args 1 |
| |
| ; ---- Pass 1: process rows. |
| |
| mov rdx, r10 ; (DCTELEM *) |
| |
| movdqa xmm0, XMMWORD [XMMBLOCK(0,0,rdx,SIZEOF_DCTELEM)] |
| movdqa xmm1, XMMWORD [XMMBLOCK(1,0,rdx,SIZEOF_DCTELEM)] |
| movdqa xmm2, XMMWORD [XMMBLOCK(2,0,rdx,SIZEOF_DCTELEM)] |
| movdqa xmm3, XMMWORD [XMMBLOCK(3,0,rdx,SIZEOF_DCTELEM)] |
| |
| ; xmm0=(00 01 02 03 04 05 06 07), xmm2=(20 21 22 23 24 25 26 27) |
| ; xmm1=(10 11 12 13 14 15 16 17), xmm3=(30 31 32 33 34 35 36 37) |
| |
| movdqa xmm4, xmm0 ; transpose coefficients(phase 1) |
| punpcklwd xmm0, xmm1 ; xmm0=(00 10 01 11 02 12 03 13) |
| punpckhwd xmm4, xmm1 ; xmm4=(04 14 05 15 06 16 07 17) |
| movdqa xmm5, xmm2 ; transpose coefficients(phase 1) |
| punpcklwd xmm2, xmm3 ; xmm2=(20 30 21 31 22 32 23 33) |
| punpckhwd xmm5, xmm3 ; xmm5=(24 34 25 35 26 36 27 37) |
| |
| movdqa xmm6, XMMWORD [XMMBLOCK(4,0,rdx,SIZEOF_DCTELEM)] |
| movdqa xmm7, XMMWORD [XMMBLOCK(5,0,rdx,SIZEOF_DCTELEM)] |
| movdqa xmm1, XMMWORD [XMMBLOCK(6,0,rdx,SIZEOF_DCTELEM)] |
| movdqa xmm3, XMMWORD [XMMBLOCK(7,0,rdx,SIZEOF_DCTELEM)] |
| |
| ; xmm6=( 4 12 20 28 36 44 52 60), xmm1=( 6 14 22 30 38 46 54 62) |
| ; xmm7=( 5 13 21 29 37 45 53 61), xmm3=( 7 15 23 31 39 47 55 63) |
| |
| movdqa XMMWORD [wk(0)], xmm2 ; wk(0)=(20 30 21 31 22 32 23 33) |
| movdqa XMMWORD [wk(1)], xmm5 ; wk(1)=(24 34 25 35 26 36 27 37) |
| |
| movdqa xmm2, xmm6 ; transpose coefficients(phase 1) |
| punpcklwd xmm6, xmm7 ; xmm6=(40 50 41 51 42 52 43 53) |
| punpckhwd xmm2, xmm7 ; xmm2=(44 54 45 55 46 56 47 57) |
| movdqa xmm5, xmm1 ; transpose coefficients(phase 1) |
| punpcklwd xmm1, xmm3 ; xmm1=(60 70 61 71 62 72 63 73) |
| punpckhwd xmm5, xmm3 ; xmm5=(64 74 65 75 66 76 67 77) |
| |
| movdqa xmm7, xmm6 ; transpose coefficients(phase 2) |
| punpckldq xmm6, xmm1 ; xmm6=(40 50 60 70 41 51 61 71) |
| punpckhdq xmm7, xmm1 ; xmm7=(42 52 62 72 43 53 63 73) |
| movdqa xmm3, xmm2 ; transpose coefficients(phase 2) |
| punpckldq xmm2, xmm5 ; xmm2=(44 54 64 74 45 55 65 75) |
| punpckhdq xmm3, xmm5 ; xmm3=(46 56 66 76 47 57 67 77) |
| |
| movdqa xmm1, XMMWORD [wk(0)] ; xmm1=(20 30 21 31 22 32 23 33) |
| movdqa xmm5, XMMWORD [wk(1)] ; xmm5=(24 34 25 35 26 36 27 37) |
| movdqa XMMWORD [wk(0)], xmm7 ; wk(0)=(42 52 62 72 43 53 63 73) |
| movdqa XMMWORD [wk(1)], xmm2 ; wk(1)=(44 54 64 74 45 55 65 75) |
| |
| movdqa xmm7, xmm0 ; transpose coefficients(phase 2) |
| punpckldq xmm0, xmm1 ; xmm0=(00 10 20 30 01 11 21 31) |
| punpckhdq xmm7, xmm1 ; xmm7=(02 12 22 32 03 13 23 33) |
| movdqa xmm2, xmm4 ; transpose coefficients(phase 2) |
| punpckldq xmm4, xmm5 ; xmm4=(04 14 24 34 05 15 25 35) |
| punpckhdq xmm2, xmm5 ; xmm2=(06 16 26 36 07 17 27 37) |
| |
| movdqa xmm1, xmm0 ; transpose coefficients(phase 3) |
| punpcklqdq xmm0, xmm6 ; xmm0=(00 10 20 30 40 50 60 70)=data0 |
| punpckhqdq xmm1, xmm6 ; xmm1=(01 11 21 31 41 51 61 71)=data1 |
| movdqa xmm5, xmm2 ; transpose coefficients(phase 3) |
| punpcklqdq xmm2, xmm3 ; xmm2=(06 16 26 36 46 56 66 76)=data6 |
| punpckhqdq xmm5, xmm3 ; xmm5=(07 17 27 37 47 57 67 77)=data7 |
| |
| movdqa xmm6, xmm1 |
| movdqa xmm3, xmm0 |
| psubw xmm1, xmm2 ; xmm1=data1-data6=tmp6 |
| psubw xmm0, xmm5 ; xmm0=data0-data7=tmp7 |
| paddw xmm6, xmm2 ; xmm6=data1+data6=tmp1 |
| paddw xmm3, xmm5 ; xmm3=data0+data7=tmp0 |
| |
| movdqa xmm2, XMMWORD [wk(0)] ; xmm2=(42 52 62 72 43 53 63 73) |
| movdqa xmm5, XMMWORD [wk(1)] ; xmm5=(44 54 64 74 45 55 65 75) |
| movdqa XMMWORD [wk(0)], xmm1 ; wk(0)=tmp6 |
| movdqa XMMWORD [wk(1)], xmm0 ; wk(1)=tmp7 |
| |
| movdqa xmm1, xmm7 ; transpose coefficients(phase 3) |
| punpcklqdq xmm7, xmm2 ; xmm7=(02 12 22 32 42 52 62 72)=data2 |
| punpckhqdq xmm1, xmm2 ; xmm1=(03 13 23 33 43 53 63 73)=data3 |
| movdqa xmm0, xmm4 ; transpose coefficients(phase 3) |
| punpcklqdq xmm4, xmm5 ; xmm4=(04 14 24 34 44 54 64 74)=data4 |
| punpckhqdq xmm0, xmm5 ; xmm0=(05 15 25 35 45 55 65 75)=data5 |
| |
| movdqa xmm2, xmm1 |
| movdqa xmm5, xmm7 |
| paddw xmm1, xmm4 ; xmm1=data3+data4=tmp3 |
| paddw xmm7, xmm0 ; xmm7=data2+data5=tmp2 |
| psubw xmm2, xmm4 ; xmm2=data3-data4=tmp4 |
| psubw xmm5, xmm0 ; xmm5=data2-data5=tmp5 |
| |
| ; -- Even part |
| |
| movdqa xmm4, xmm3 |
| movdqa xmm0, xmm6 |
| psubw xmm3, xmm1 ; xmm3=tmp13 |
| psubw xmm6, xmm7 ; xmm6=tmp12 |
| paddw xmm4, xmm1 ; xmm4=tmp10 |
| paddw xmm0, xmm7 ; xmm0=tmp11 |
| |
| paddw xmm6, xmm3 |
| psllw xmm6, PRE_MULTIPLY_SCALE_BITS |
| pmulhw xmm6, [rel PW_F0707] ; xmm6=z1 |
| |
| movdqa xmm1, xmm4 |
| movdqa xmm7, xmm3 |
| psubw xmm4, xmm0 ; xmm4=data4 |
| psubw xmm3, xmm6 ; xmm3=data6 |
| paddw xmm1, xmm0 ; xmm1=data0 |
| paddw xmm7, xmm6 ; xmm7=data2 |
| |
| movdqa xmm0, XMMWORD [wk(0)] ; xmm0=tmp6 |
| movdqa xmm6, XMMWORD [wk(1)] ; xmm6=tmp7 |
| movdqa XMMWORD [wk(0)], xmm4 ; wk(0)=data4 |
| movdqa XMMWORD [wk(1)], xmm3 ; wk(1)=data6 |
| |
| ; -- Odd part |
| |
| paddw xmm2, xmm5 ; xmm2=tmp10 |
| paddw xmm5, xmm0 ; xmm5=tmp11 |
| paddw xmm0, xmm6 ; xmm0=tmp12, xmm6=tmp7 |
| |
| psllw xmm2, PRE_MULTIPLY_SCALE_BITS |
| psllw xmm0, PRE_MULTIPLY_SCALE_BITS |
| |
| psllw xmm5, PRE_MULTIPLY_SCALE_BITS |
| pmulhw xmm5, [rel PW_F0707] ; xmm5=z3 |
| |
| movdqa xmm4, xmm2 ; xmm4=tmp10 |
| psubw xmm2, xmm0 |
| pmulhw xmm2, [rel PW_F0382] ; xmm2=z5 |
| pmulhw xmm4, [rel PW_F0541] ; xmm4=MULTIPLY(tmp10,FIX_0_541196) |
| pmulhw xmm0, [rel PW_F1306] ; xmm0=MULTIPLY(tmp12,FIX_1_306562) |
| paddw xmm4, xmm2 ; xmm4=z2 |
| paddw xmm0, xmm2 ; xmm0=z4 |
| |
| movdqa xmm3, xmm6 |
| psubw xmm6, xmm5 ; xmm6=z13 |
| paddw xmm3, xmm5 ; xmm3=z11 |
| |
| movdqa xmm2, xmm6 |
| movdqa xmm5, xmm3 |
| psubw xmm6, xmm4 ; xmm6=data3 |
| psubw xmm3, xmm0 ; xmm3=data7 |
| paddw xmm2, xmm4 ; xmm2=data5 |
| paddw xmm5, xmm0 ; xmm5=data1 |
| |
| ; ---- Pass 2: process columns. |
| |
| ; xmm1=(00 10 20 30 40 50 60 70), xmm7=(02 12 22 32 42 52 62 72) |
| ; xmm5=(01 11 21 31 41 51 61 71), xmm6=(03 13 23 33 43 53 63 73) |
| |
| movdqa xmm4, xmm1 ; transpose coefficients(phase 1) |
| punpcklwd xmm1, xmm5 ; xmm1=(00 01 10 11 20 21 30 31) |
| punpckhwd xmm4, xmm5 ; xmm4=(40 41 50 51 60 61 70 71) |
| movdqa xmm0, xmm7 ; transpose coefficients(phase 1) |
| punpcklwd xmm7, xmm6 ; xmm7=(02 03 12 13 22 23 32 33) |
| punpckhwd xmm0, xmm6 ; xmm0=(42 43 52 53 62 63 72 73) |
| |
| movdqa xmm5, XMMWORD [wk(0)] ; xmm5=col4 |
| movdqa xmm6, XMMWORD [wk(1)] ; xmm6=col6 |
| |
| ; xmm5=(04 14 24 34 44 54 64 74), xmm6=(06 16 26 36 46 56 66 76) |
| ; xmm2=(05 15 25 35 45 55 65 75), xmm3=(07 17 27 37 47 57 67 77) |
| |
| movdqa XMMWORD [wk(0)], xmm7 ; wk(0)=(02 03 12 13 22 23 32 33) |
| movdqa XMMWORD [wk(1)], xmm0 ; wk(1)=(42 43 52 53 62 63 72 73) |
| |
| movdqa xmm7, xmm5 ; transpose coefficients(phase 1) |
| punpcklwd xmm5, xmm2 ; xmm5=(04 05 14 15 24 25 34 35) |
| punpckhwd xmm7, xmm2 ; xmm7=(44 45 54 55 64 65 74 75) |
| movdqa xmm0, xmm6 ; transpose coefficients(phase 1) |
| punpcklwd xmm6, xmm3 ; xmm6=(06 07 16 17 26 27 36 37) |
| punpckhwd xmm0, xmm3 ; xmm0=(46 47 56 57 66 67 76 77) |
| |
| movdqa xmm2, xmm5 ; transpose coefficients(phase 2) |
| punpckldq xmm5, xmm6 ; xmm5=(04 05 06 07 14 15 16 17) |
| punpckhdq xmm2, xmm6 ; xmm2=(24 25 26 27 34 35 36 37) |
| movdqa xmm3, xmm7 ; transpose coefficients(phase 2) |
| punpckldq xmm7, xmm0 ; xmm7=(44 45 46 47 54 55 56 57) |
| punpckhdq xmm3, xmm0 ; xmm3=(64 65 66 67 74 75 76 77) |
| |
| movdqa xmm6, XMMWORD [wk(0)] ; xmm6=(02 03 12 13 22 23 32 33) |
| movdqa xmm0, XMMWORD [wk(1)] ; xmm0=(42 43 52 53 62 63 72 73) |
| movdqa XMMWORD [wk(0)], xmm2 ; wk(0)=(24 25 26 27 34 35 36 37) |
| movdqa XMMWORD [wk(1)], xmm7 ; wk(1)=(44 45 46 47 54 55 56 57) |
| |
| movdqa xmm2, xmm1 ; transpose coefficients(phase 2) |
| punpckldq xmm1, xmm6 ; xmm1=(00 01 02 03 10 11 12 13) |
| punpckhdq xmm2, xmm6 ; xmm2=(20 21 22 23 30 31 32 33) |
| movdqa xmm7, xmm4 ; transpose coefficients(phase 2) |
| punpckldq xmm4, xmm0 ; xmm4=(40 41 42 43 50 51 52 53) |
| punpckhdq xmm7, xmm0 ; xmm7=(60 61 62 63 70 71 72 73) |
| |
| movdqa xmm6, xmm1 ; transpose coefficients(phase 3) |
| punpcklqdq xmm1, xmm5 ; xmm1=(00 01 02 03 04 05 06 07)=data0 |
| punpckhqdq xmm6, xmm5 ; xmm6=(10 11 12 13 14 15 16 17)=data1 |
| movdqa xmm0, xmm7 ; transpose coefficients(phase 3) |
| punpcklqdq xmm7, xmm3 ; xmm7=(60 61 62 63 64 65 66 67)=data6 |
| punpckhqdq xmm0, xmm3 ; xmm0=(70 71 72 73 74 75 76 77)=data7 |
| |
| movdqa xmm5, xmm6 |
| movdqa xmm3, xmm1 |
| psubw xmm6, xmm7 ; xmm6=data1-data6=tmp6 |
| psubw xmm1, xmm0 ; xmm1=data0-data7=tmp7 |
| paddw xmm5, xmm7 ; xmm5=data1+data6=tmp1 |
| paddw xmm3, xmm0 ; xmm3=data0+data7=tmp0 |
| |
| movdqa xmm7, XMMWORD [wk(0)] ; xmm7=(24 25 26 27 34 35 36 37) |
| movdqa xmm0, XMMWORD [wk(1)] ; xmm0=(44 45 46 47 54 55 56 57) |
| movdqa XMMWORD [wk(0)], xmm6 ; wk(0)=tmp6 |
| movdqa XMMWORD [wk(1)], xmm1 ; wk(1)=tmp7 |
| |
| movdqa xmm6, xmm2 ; transpose coefficients(phase 3) |
| punpcklqdq xmm2, xmm7 ; xmm2=(20 21 22 23 24 25 26 27)=data2 |
| punpckhqdq xmm6, xmm7 ; xmm6=(30 31 32 33 34 35 36 37)=data3 |
| movdqa xmm1, xmm4 ; transpose coefficients(phase 3) |
| punpcklqdq xmm4, xmm0 ; xmm4=(40 41 42 43 44 45 46 47)=data4 |
| punpckhqdq xmm1, xmm0 ; xmm1=(50 51 52 53 54 55 56 57)=data5 |
| |
| movdqa xmm7, xmm6 |
| movdqa xmm0, xmm2 |
| paddw xmm6, xmm4 ; xmm6=data3+data4=tmp3 |
| paddw xmm2, xmm1 ; xmm2=data2+data5=tmp2 |
| psubw xmm7, xmm4 ; xmm7=data3-data4=tmp4 |
| psubw xmm0, xmm1 ; xmm0=data2-data5=tmp5 |
| |
| ; -- Even part |
| |
| movdqa xmm4, xmm3 |
| movdqa xmm1, xmm5 |
| psubw xmm3, xmm6 ; xmm3=tmp13 |
| psubw xmm5, xmm2 ; xmm5=tmp12 |
| paddw xmm4, xmm6 ; xmm4=tmp10 |
| paddw xmm1, xmm2 ; xmm1=tmp11 |
| |
| paddw xmm5, xmm3 |
| psllw xmm5, PRE_MULTIPLY_SCALE_BITS |
| pmulhw xmm5, [rel PW_F0707] ; xmm5=z1 |
| |
| movdqa xmm6, xmm4 |
| movdqa xmm2, xmm3 |
| psubw xmm4, xmm1 ; xmm4=data4 |
| psubw xmm3, xmm5 ; xmm3=data6 |
| paddw xmm6, xmm1 ; xmm6=data0 |
| paddw xmm2, xmm5 ; xmm2=data2 |
| |
| movdqa XMMWORD [XMMBLOCK(4,0,rdx,SIZEOF_DCTELEM)], xmm4 |
| movdqa XMMWORD [XMMBLOCK(6,0,rdx,SIZEOF_DCTELEM)], xmm3 |
| movdqa XMMWORD [XMMBLOCK(0,0,rdx,SIZEOF_DCTELEM)], xmm6 |
| movdqa XMMWORD [XMMBLOCK(2,0,rdx,SIZEOF_DCTELEM)], xmm2 |
| |
| ; -- Odd part |
| |
| movdqa xmm1, XMMWORD [wk(0)] ; xmm1=tmp6 |
| movdqa xmm5, XMMWORD [wk(1)] ; xmm5=tmp7 |
| |
| paddw xmm7, xmm0 ; xmm7=tmp10 |
| paddw xmm0, xmm1 ; xmm0=tmp11 |
| paddw xmm1, xmm5 ; xmm1=tmp12, xmm5=tmp7 |
| |
| psllw xmm7, PRE_MULTIPLY_SCALE_BITS |
| psllw xmm1, PRE_MULTIPLY_SCALE_BITS |
| |
| psllw xmm0, PRE_MULTIPLY_SCALE_BITS |
| pmulhw xmm0, [rel PW_F0707] ; xmm0=z3 |
| |
| movdqa xmm4, xmm7 ; xmm4=tmp10 |
| psubw xmm7, xmm1 |
| pmulhw xmm7, [rel PW_F0382] ; xmm7=z5 |
| pmulhw xmm4, [rel PW_F0541] ; xmm4=MULTIPLY(tmp10,FIX_0_541196) |
| pmulhw xmm1, [rel PW_F1306] ; xmm1=MULTIPLY(tmp12,FIX_1_306562) |
| paddw xmm4, xmm7 ; xmm4=z2 |
| paddw xmm1, xmm7 ; xmm1=z4 |
| |
| movdqa xmm3, xmm5 |
| psubw xmm5, xmm0 ; xmm5=z13 |
| paddw xmm3, xmm0 ; xmm3=z11 |
| |
| movdqa xmm6, xmm5 |
| movdqa xmm2, xmm3 |
| psubw xmm5, xmm4 ; xmm5=data3 |
| psubw xmm3, xmm1 ; xmm3=data7 |
| paddw xmm6, xmm4 ; xmm6=data5 |
| paddw xmm2, xmm1 ; xmm2=data1 |
| |
| movdqa XMMWORD [XMMBLOCK(3,0,rdx,SIZEOF_DCTELEM)], xmm5 |
| movdqa XMMWORD [XMMBLOCK(7,0,rdx,SIZEOF_DCTELEM)], xmm3 |
| movdqa XMMWORD [XMMBLOCK(5,0,rdx,SIZEOF_DCTELEM)], xmm6 |
| movdqa XMMWORD [XMMBLOCK(1,0,rdx,SIZEOF_DCTELEM)], xmm2 |
| |
| uncollect_args 1 |
| mov rsp, rbp ; rsp <- aligned rbp |
| pop rsp ; rsp <- original rbp |
| pop rbp |
| ret |
| |
| ; For some reason, the OS X linker does not honor the request to align the |
| ; segment unless we do this. |
| align 32 |
