2 ; jidctflt.asm - floating-point IDCT (SSE & MMX)
4 ; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
6 ; Based on the x86 SIMD extension for IJG JPEG library
7 ; Copyright (C) 1999-2006, MIYASAKA Masaru.
8 ; For conditions of distribution and use, see copyright notice in jsimdext.inc
10 ; This file should be assembled with NASM (Netwide Assembler),
11 ; can *not* be assembled with Microsoft's MASM or any compatible
12 ; assembler (including Borland's Turbo Assembler).
13 ; NASM is available from http://nasm.sourceforge.net/ or
14 ; http://sourceforge.net/project/showfiles.php?group_id=6208
16 ; This file contains a floating-point implementation of the inverse DCT
17 ; (Discrete Cosine Transform). The following code is based directly on
18 ; the IJG's original jidctflt.c; see the jidctflt.c for more details.
22 %include "jsimdext.inc"
25 ; --------------------------------------------------------------------------
27 %macro unpcklps2 2 ; %1=(0 1 2 3) / %2=(4 5 6 7) => %1=(0 1 4 5)
31 %macro unpckhps2 2 ; %1=(0 1 2 3) / %2=(4 5 6 7) => %1=(2 3 6 7)
35 ; --------------------------------------------------------------------------
39 global EXTN(jconst_idct_float_sse)
41 EXTN(jconst_idct_float_sse):
43 PD_1_414 times 4 dd 1.414213562373095048801689
44 PD_1_847 times 4 dd 1.847759065022573512256366
45 PD_1_082 times 4 dd 1.082392200292393968799446
46 PD_M2_613 times 4 dd -2.613125929752753055713286
47 PD_0_125 times 4 dd 0.125 ; 1/8
48 PB_CENTERJSAMP times 8 db CENTERJSAMPLE
52 ; --------------------------------------------------------------------------
56 ; Perform dequantization and inverse DCT on one block of coefficients.
59 ; jsimd_idct_float_sse (void *dct_table, JCOEFPTR coef_block,
60 ; JSAMPARRAY output_buf, JDIMENSION output_col)
63 %define dct_table(b) (b)+8 ; void *dct_table
64 %define coef_block(b) (b)+12 ; JCOEFPTR coef_block
65 %define output_buf(b) (b)+16 ; JSAMPARRAY output_buf
66 %define output_col(b) (b)+20 ; JDIMENSION output_col
68 %define original_ebp ebp+0
69 %define wk(i) ebp-(WK_NUM-(i))*SIZEOF_XMMWORD ; xmmword wk[WK_NUM]
71 %define workspace wk(0)-DCTSIZE2*SIZEOF_FAST_FLOAT
72 ; FAST_FLOAT workspace[DCTSIZE2]
75 global EXTN(jsimd_idct_float_sse)
77 EXTN(jsimd_idct_float_sse):
79 mov eax,esp ; eax = original ebp
81 and esp, byte (-SIZEOF_XMMWORD) ; align to 128 bits
83 mov ebp,esp ; ebp = aligned ebp
86 ; push ecx ; need not be preserved
87 ; push edx ; need not be preserved
91 get_GOT ebx ; get GOT address
93 ; ---- Pass 1: process columns from input, store into work array.
95 ; mov eax, [original_ebp]
96 mov edx, POINTER [dct_table(eax)] ; quantptr
97 mov esi, JCOEFPTR [coef_block(eax)] ; inptr
98 lea edi, [workspace] ; FAST_FLOAT *wsptr
99 mov ecx, DCTSIZE/4 ; ctr
102 %ifndef NO_ZERO_COLUMN_TEST_FLOAT_SSE
103 mov eax, DWORD [DWBLOCK(1,0,esi,SIZEOF_JCOEF)]
104 or eax, DWORD [DWBLOCK(2,0,esi,SIZEOF_JCOEF)]
107 movq mm0, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)]
108 movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)]
109 por mm0, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)]
110 por mm1, MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)]
111 por mm0, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)]
112 por mm1, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)]
113 por mm0, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)]
120 ; -- AC terms all zero
122 movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)]
124 punpckhwd mm1,mm0 ; mm1=(** 02 ** 03)
125 punpcklwd mm0,mm0 ; mm0=(00 00 01 01)
126 psrad mm1,(DWORD_BIT-WORD_BIT) ; mm1=in0H=(02 03)
127 psrad mm0,(DWORD_BIT-WORD_BIT) ; mm0=in0L=(00 01)
128 cvtpi2ps xmm3,mm1 ; xmm3=(02 03 ** **)
129 cvtpi2ps xmm0,mm0 ; xmm0=(00 01 ** **)
130 movlhps xmm0,xmm3 ; xmm0=in0=(00 01 02 03)
132 mulps xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
138 shufps xmm0,xmm0,0x00 ; xmm0=(00 00 00 00)
139 shufps xmm1,xmm1,0x55 ; xmm1=(01 01 01 01)
140 shufps xmm2,xmm2,0xAA ; xmm2=(02 02 02 02)
141 shufps xmm3,xmm3,0xFF ; xmm3=(03 03 03 03)
143 movaps XMMWORD [XMMBLOCK(0,0,edi,SIZEOF_FAST_FLOAT)], xmm0
144 movaps XMMWORD [XMMBLOCK(0,1,edi,SIZEOF_FAST_FLOAT)], xmm0
145 movaps XMMWORD [XMMBLOCK(1,0,edi,SIZEOF_FAST_FLOAT)], xmm1
146 movaps XMMWORD [XMMBLOCK(1,1,edi,SIZEOF_FAST_FLOAT)], xmm1
147 movaps XMMWORD [XMMBLOCK(2,0,edi,SIZEOF_FAST_FLOAT)], xmm2
148 movaps XMMWORD [XMMBLOCK(2,1,edi,SIZEOF_FAST_FLOAT)], xmm2
149 movaps XMMWORD [XMMBLOCK(3,0,edi,SIZEOF_FAST_FLOAT)], xmm3
150 movaps XMMWORD [XMMBLOCK(3,1,edi,SIZEOF_FAST_FLOAT)], xmm3
158 movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)]
159 movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)]
160 movq mm2, MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)]
161 movq mm3, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)]
163 punpckhwd mm4,mm0 ; mm4=(** 02 ** 03)
164 punpcklwd mm0,mm0 ; mm0=(00 00 01 01)
165 punpckhwd mm5,mm1 ; mm5=(** 22 ** 23)
166 punpcklwd mm1,mm1 ; mm1=(20 20 21 21)
168 psrad mm4,(DWORD_BIT-WORD_BIT) ; mm4=in0H=(02 03)
169 psrad mm0,(DWORD_BIT-WORD_BIT) ; mm0=in0L=(00 01)
170 cvtpi2ps xmm4,mm4 ; xmm4=(02 03 ** **)
171 cvtpi2ps xmm0,mm0 ; xmm0=(00 01 ** **)
172 psrad mm5,(DWORD_BIT-WORD_BIT) ; mm5=in2H=(22 23)
173 psrad mm1,(DWORD_BIT-WORD_BIT) ; mm1=in2L=(20 21)
174 cvtpi2ps xmm5,mm5 ; xmm5=(22 23 ** **)
175 cvtpi2ps xmm1,mm1 ; xmm1=(20 21 ** **)
177 punpckhwd mm6,mm2 ; mm6=(** 42 ** 43)
178 punpcklwd mm2,mm2 ; mm2=(40 40 41 41)
179 punpckhwd mm7,mm3 ; mm7=(** 62 ** 63)
180 punpcklwd mm3,mm3 ; mm3=(60 60 61 61)
182 psrad mm6,(DWORD_BIT-WORD_BIT) ; mm6=in4H=(42 43)
183 psrad mm2,(DWORD_BIT-WORD_BIT) ; mm2=in4L=(40 41)
184 cvtpi2ps xmm6,mm6 ; xmm6=(42 43 ** **)
185 cvtpi2ps xmm2,mm2 ; xmm2=(40 41 ** **)
186 psrad mm7,(DWORD_BIT-WORD_BIT) ; mm7=in6H=(62 63)
187 psrad mm3,(DWORD_BIT-WORD_BIT) ; mm3=in6L=(60 61)
188 cvtpi2ps xmm7,mm7 ; xmm7=(62 63 ** **)
189 cvtpi2ps xmm3,mm3 ; xmm3=(60 61 ** **)
191 movlhps xmm0,xmm4 ; xmm0=in0=(00 01 02 03)
192 movlhps xmm1,xmm5 ; xmm1=in2=(20 21 22 23)
193 mulps xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
194 mulps xmm1, XMMWORD [XMMBLOCK(2,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
196 movlhps xmm2,xmm6 ; xmm2=in4=(40 41 42 43)
197 movlhps xmm3,xmm7 ; xmm3=in6=(60 61 62 63)
198 mulps xmm2, XMMWORD [XMMBLOCK(4,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
199 mulps xmm3, XMMWORD [XMMBLOCK(6,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
203 subps xmm0,xmm2 ; xmm0=tmp11
205 addps xmm4,xmm2 ; xmm4=tmp10
206 addps xmm5,xmm3 ; xmm5=tmp13
208 mulps xmm1,[GOTOFF(ebx,PD_1_414)]
209 subps xmm1,xmm5 ; xmm1=tmp12
213 subps xmm4,xmm5 ; xmm4=tmp3
214 subps xmm0,xmm1 ; xmm0=tmp2
215 addps xmm6,xmm5 ; xmm6=tmp0
216 addps xmm7,xmm1 ; xmm7=tmp1
218 movaps XMMWORD [wk(1)], xmm4 ; tmp3
219 movaps XMMWORD [wk(0)], xmm0 ; tmp2
223 movq mm4, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)]
224 movq mm0, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)]
225 movq mm5, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)]
226 movq mm1, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)]
228 punpckhwd mm6,mm4 ; mm6=(** 12 ** 13)
229 punpcklwd mm4,mm4 ; mm4=(10 10 11 11)
230 punpckhwd mm2,mm0 ; mm2=(** 32 ** 33)
231 punpcklwd mm0,mm0 ; mm0=(30 30 31 31)
233 psrad mm6,(DWORD_BIT-WORD_BIT) ; mm6=in1H=(12 13)
234 psrad mm4,(DWORD_BIT-WORD_BIT) ; mm4=in1L=(10 11)
235 cvtpi2ps xmm4,mm6 ; xmm4=(12 13 ** **)
236 cvtpi2ps xmm2,mm4 ; xmm2=(10 11 ** **)
237 psrad mm2,(DWORD_BIT-WORD_BIT) ; mm2=in3H=(32 33)
238 psrad mm0,(DWORD_BIT-WORD_BIT) ; mm0=in3L=(30 31)
239 cvtpi2ps xmm0,mm2 ; xmm0=(32 33 ** **)
240 cvtpi2ps xmm3,mm0 ; xmm3=(30 31 ** **)
242 punpckhwd mm7,mm5 ; mm7=(** 52 ** 53)
243 punpcklwd mm5,mm5 ; mm5=(50 50 51 51)
244 punpckhwd mm3,mm1 ; mm3=(** 72 ** 73)
245 punpcklwd mm1,mm1 ; mm1=(70 70 71 71)
247 movlhps xmm2,xmm4 ; xmm2=in1=(10 11 12 13)
248 movlhps xmm3,xmm0 ; xmm3=in3=(30 31 32 33)
250 psrad mm7,(DWORD_BIT-WORD_BIT) ; mm7=in5H=(52 53)
251 psrad mm5,(DWORD_BIT-WORD_BIT) ; mm5=in5L=(50 51)
252 cvtpi2ps xmm4,mm7 ; xmm4=(52 53 ** **)
253 cvtpi2ps xmm5,mm5 ; xmm5=(50 51 ** **)
254 psrad mm3,(DWORD_BIT-WORD_BIT) ; mm3=in7H=(72 73)
255 psrad mm1,(DWORD_BIT-WORD_BIT) ; mm1=in7L=(70 71)
256 cvtpi2ps xmm0,mm3 ; xmm0=(72 73 ** **)
257 cvtpi2ps xmm1,mm1 ; xmm1=(70 71 ** **)
259 mulps xmm2, XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
260 mulps xmm3, XMMWORD [XMMBLOCK(3,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
262 movlhps xmm5,xmm4 ; xmm5=in5=(50 51 52 53)
263 movlhps xmm1,xmm0 ; xmm1=in7=(70 71 72 73)
264 mulps xmm5, XMMWORD [XMMBLOCK(5,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
265 mulps xmm1, XMMWORD [XMMBLOCK(7,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
269 addps xmm2,xmm1 ; xmm2=z11
270 addps xmm5,xmm3 ; xmm5=z13
271 subps xmm4,xmm1 ; xmm4=z12
272 subps xmm0,xmm3 ; xmm0=z10
276 addps xmm1,xmm5 ; xmm1=tmp7
278 mulps xmm2,[GOTOFF(ebx,PD_1_414)] ; xmm2=tmp11
282 mulps xmm0,[GOTOFF(ebx,PD_1_847)] ; xmm0=z5
283 mulps xmm3,[GOTOFF(ebx,PD_M2_613)] ; xmm3=(z10 * -2.613125930)
284 mulps xmm4,[GOTOFF(ebx,PD_1_082)] ; xmm4=(z12 * 1.082392200)
285 addps xmm3,xmm0 ; xmm3=tmp12
286 subps xmm4,xmm0 ; xmm4=tmp10
288 ; -- Final output stage
290 subps xmm3,xmm1 ; xmm3=tmp6
293 addps xmm6,xmm1 ; xmm6=data0=(00 01 02 03)
294 addps xmm7,xmm3 ; xmm7=data1=(10 11 12 13)
295 subps xmm5,xmm1 ; xmm5=data7=(70 71 72 73)
296 subps xmm0,xmm3 ; xmm0=data6=(60 61 62 63)
297 subps xmm2,xmm3 ; xmm2=tmp5
299 movaps xmm1,xmm6 ; transpose coefficients(phase 1)
300 unpcklps xmm6,xmm7 ; xmm6=(00 10 01 11)
301 unpckhps xmm1,xmm7 ; xmm1=(02 12 03 13)
302 movaps xmm3,xmm0 ; transpose coefficients(phase 1)
303 unpcklps xmm0,xmm5 ; xmm0=(60 70 61 71)
304 unpckhps xmm3,xmm5 ; xmm3=(62 72 63 73)
306 movaps xmm7, XMMWORD [wk(0)] ; xmm7=tmp2
307 movaps xmm5, XMMWORD [wk(1)] ; xmm5=tmp3
309 movaps XMMWORD [wk(0)], xmm0 ; wk(0)=(60 70 61 71)
310 movaps XMMWORD [wk(1)], xmm3 ; wk(1)=(62 72 63 73)
312 addps xmm4,xmm2 ; xmm4=tmp4
315 addps xmm7,xmm2 ; xmm7=data2=(20 21 22 23)
316 addps xmm5,xmm4 ; xmm5=data4=(40 41 42 43)
317 subps xmm0,xmm2 ; xmm0=data5=(50 51 52 53)
318 subps xmm3,xmm4 ; xmm3=data3=(30 31 32 33)
320 movaps xmm2,xmm7 ; transpose coefficients(phase 1)
321 unpcklps xmm7,xmm3 ; xmm7=(20 30 21 31)
322 unpckhps xmm2,xmm3 ; xmm2=(22 32 23 33)
323 movaps xmm4,xmm5 ; transpose coefficients(phase 1)
324 unpcklps xmm5,xmm0 ; xmm5=(40 50 41 51)
325 unpckhps xmm4,xmm0 ; xmm4=(42 52 43 53)
327 movaps xmm3,xmm6 ; transpose coefficients(phase 2)
328 unpcklps2 xmm6,xmm7 ; xmm6=(00 10 20 30)
329 unpckhps2 xmm3,xmm7 ; xmm3=(01 11 21 31)
330 movaps xmm0,xmm1 ; transpose coefficients(phase 2)
331 unpcklps2 xmm1,xmm2 ; xmm1=(02 12 22 32)
332 unpckhps2 xmm0,xmm2 ; xmm0=(03 13 23 33)
334 movaps xmm7, XMMWORD [wk(0)] ; xmm7=(60 70 61 71)
335 movaps xmm2, XMMWORD [wk(1)] ; xmm2=(62 72 63 73)
337 movaps XMMWORD [XMMBLOCK(0,0,edi,SIZEOF_FAST_FLOAT)], xmm6
338 movaps XMMWORD [XMMBLOCK(1,0,edi,SIZEOF_FAST_FLOAT)], xmm3
339 movaps XMMWORD [XMMBLOCK(2,0,edi,SIZEOF_FAST_FLOAT)], xmm1
340 movaps XMMWORD [XMMBLOCK(3,0,edi,SIZEOF_FAST_FLOAT)], xmm0
342 movaps xmm6,xmm5 ; transpose coefficients(phase 2)
343 unpcklps2 xmm5,xmm7 ; xmm5=(40 50 60 70)
344 unpckhps2 xmm6,xmm7 ; xmm6=(41 51 61 71)
345 movaps xmm3,xmm4 ; transpose coefficients(phase 2)
346 unpcklps2 xmm4,xmm2 ; xmm4=(42 52 62 72)
347 unpckhps2 xmm3,xmm2 ; xmm3=(43 53 63 73)
349 movaps XMMWORD [XMMBLOCK(0,1,edi,SIZEOF_FAST_FLOAT)], xmm5
350 movaps XMMWORD [XMMBLOCK(1,1,edi,SIZEOF_FAST_FLOAT)], xmm6
351 movaps XMMWORD [XMMBLOCK(2,1,edi,SIZEOF_FAST_FLOAT)], xmm4
352 movaps XMMWORD [XMMBLOCK(3,1,edi,SIZEOF_FAST_FLOAT)], xmm3
355 add esi, byte 4*SIZEOF_JCOEF ; coef_block
356 add edx, byte 4*SIZEOF_FLOAT_MULT_TYPE ; quantptr
357 add edi, 4*DCTSIZE*SIZEOF_FAST_FLOAT ; wsptr
361 ; -- Prefetch the next coefficient block
363 prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 0*32]
364 prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 1*32]
365 prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 2*32]
366 prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 3*32]
368 ; ---- Pass 2: process rows from work array, store into output array.
370 mov eax, [original_ebp]
371 lea esi, [workspace] ; FAST_FLOAT *wsptr
372 mov edi, JSAMPARRAY [output_buf(eax)] ; (JSAMPROW *)
373 mov eax, JDIMENSION [output_col(eax)]
374 mov ecx, DCTSIZE/4 ; ctr
380 movaps xmm0, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_FAST_FLOAT)]
381 movaps xmm1, XMMWORD [XMMBLOCK(2,0,esi,SIZEOF_FAST_FLOAT)]
382 movaps xmm2, XMMWORD [XMMBLOCK(4,0,esi,SIZEOF_FAST_FLOAT)]
383 movaps xmm3, XMMWORD [XMMBLOCK(6,0,esi,SIZEOF_FAST_FLOAT)]
387 subps xmm0,xmm2 ; xmm0=tmp11
389 addps xmm4,xmm2 ; xmm4=tmp10
390 addps xmm5,xmm3 ; xmm5=tmp13
392 mulps xmm1,[GOTOFF(ebx,PD_1_414)]
393 subps xmm1,xmm5 ; xmm1=tmp12
397 subps xmm4,xmm5 ; xmm4=tmp3
398 subps xmm0,xmm1 ; xmm0=tmp2
399 addps xmm6,xmm5 ; xmm6=tmp0
400 addps xmm7,xmm1 ; xmm7=tmp1
402 movaps XMMWORD [wk(1)], xmm4 ; tmp3
403 movaps XMMWORD [wk(0)], xmm0 ; tmp2
407 movaps xmm2, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_FAST_FLOAT)]
408 movaps xmm3, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_FAST_FLOAT)]
409 movaps xmm5, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_FAST_FLOAT)]
410 movaps xmm1, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_FAST_FLOAT)]
414 addps xmm2,xmm1 ; xmm2=z11
415 addps xmm5,xmm3 ; xmm5=z13
416 subps xmm4,xmm1 ; xmm4=z12
417 subps xmm0,xmm3 ; xmm0=z10
421 addps xmm1,xmm5 ; xmm1=tmp7
423 mulps xmm2,[GOTOFF(ebx,PD_1_414)] ; xmm2=tmp11
427 mulps xmm0,[GOTOFF(ebx,PD_1_847)] ; xmm0=z5
428 mulps xmm3,[GOTOFF(ebx,PD_M2_613)] ; xmm3=(z10 * -2.613125930)
429 mulps xmm4,[GOTOFF(ebx,PD_1_082)] ; xmm4=(z12 * 1.082392200)
430 addps xmm3,xmm0 ; xmm3=tmp12
431 subps xmm4,xmm0 ; xmm4=tmp10
433 ; -- Final output stage
435 subps xmm3,xmm1 ; xmm3=tmp6
438 addps xmm6,xmm1 ; xmm6=data0=(00 10 20 30)
439 addps xmm7,xmm3 ; xmm7=data1=(01 11 21 31)
440 subps xmm5,xmm1 ; xmm5=data7=(07 17 27 37)
441 subps xmm0,xmm3 ; xmm0=data6=(06 16 26 36)
442 subps xmm2,xmm3 ; xmm2=tmp5
444 movaps xmm1,[GOTOFF(ebx,PD_0_125)] ; xmm1=[PD_0_125]
446 mulps xmm6,xmm1 ; descale(1/8)
447 mulps xmm7,xmm1 ; descale(1/8)
448 mulps xmm5,xmm1 ; descale(1/8)
449 mulps xmm0,xmm1 ; descale(1/8)
453 cvtps2pi mm0,xmm6 ; round to int32, mm0=data0L=(00 10)
454 cvtps2pi mm1,xmm7 ; round to int32, mm1=data1L=(01 11)
455 cvtps2pi mm2,xmm3 ; round to int32, mm2=data0H=(20 30)
456 cvtps2pi mm3,xmm1 ; round to int32, mm3=data1H=(21 31)
457 packssdw mm0,mm2 ; mm0=data0=(00 10 20 30)
458 packssdw mm1,mm3 ; mm1=data1=(01 11 21 31)
462 cvtps2pi mm4,xmm5 ; round to int32, mm4=data7L=(07 17)
463 cvtps2pi mm5,xmm0 ; round to int32, mm5=data6L=(06 16)
464 cvtps2pi mm6,xmm6 ; round to int32, mm6=data7H=(27 37)
465 cvtps2pi mm7,xmm7 ; round to int32, mm7=data6H=(26 36)
466 packssdw mm4,mm6 ; mm4=data7=(07 17 27 37)
467 packssdw mm5,mm7 ; mm5=data6=(06 16 26 36)
469 packsswb mm0,mm5 ; mm0=(00 10 20 30 06 16 26 36)
470 packsswb mm1,mm4 ; mm1=(01 11 21 31 07 17 27 37)
472 movaps xmm3, XMMWORD [wk(0)] ; xmm3=tmp2
473 movaps xmm1, XMMWORD [wk(1)] ; xmm1=tmp3
475 movaps xmm6,[GOTOFF(ebx,PD_0_125)] ; xmm6=[PD_0_125]
477 addps xmm4,xmm2 ; xmm4=tmp4
480 addps xmm3,xmm2 ; xmm3=data2=(02 12 22 32)
481 addps xmm1,xmm4 ; xmm1=data4=(04 14 24 34)
482 subps xmm5,xmm2 ; xmm5=data5=(05 15 25 35)
483 subps xmm0,xmm4 ; xmm0=data3=(03 13 23 33)
485 mulps xmm3,xmm6 ; descale(1/8)
486 mulps xmm1,xmm6 ; descale(1/8)
487 mulps xmm5,xmm6 ; descale(1/8)
488 mulps xmm0,xmm6 ; descale(1/8)
492 cvtps2pi mm2,xmm3 ; round to int32, mm2=data2L=(02 12)
493 cvtps2pi mm3,xmm1 ; round to int32, mm3=data4L=(04 14)
494 cvtps2pi mm6,xmm7 ; round to int32, mm6=data2H=(22 32)
495 cvtps2pi mm7,xmm2 ; round to int32, mm7=data4H=(24 34)
496 packssdw mm2,mm6 ; mm2=data2=(02 12 22 32)
497 packssdw mm3,mm7 ; mm3=data4=(04 14 24 34)
501 cvtps2pi mm5,xmm5 ; round to int32, mm5=data5L=(05 15)
502 cvtps2pi mm4,xmm0 ; round to int32, mm4=data3L=(03 13)
503 cvtps2pi mm6,xmm4 ; round to int32, mm6=data5H=(25 35)
504 cvtps2pi mm7,xmm6 ; round to int32, mm7=data3H=(23 33)
505 packssdw mm5,mm6 ; mm5=data5=(05 15 25 35)
506 packssdw mm4,mm7 ; mm4=data3=(03 13 23 33)
508 movq mm6,[GOTOFF(ebx,PB_CENTERJSAMP)] ; mm6=[PB_CENTERJSAMP]
510 packsswb mm2,mm3 ; mm2=(02 12 22 32 04 14 24 34)
511 packsswb mm4,mm5 ; mm4=(03 13 23 33 05 15 25 35)
518 movq mm7,mm0 ; transpose coefficients(phase 1)
519 punpcklbw mm0,mm1 ; mm0=(00 01 10 11 20 21 30 31)
520 punpckhbw mm7,mm1 ; mm7=(06 07 16 17 26 27 36 37)
521 movq mm3,mm2 ; transpose coefficients(phase 1)
522 punpcklbw mm2,mm4 ; mm2=(02 03 12 13 22 23 32 33)
523 punpckhbw mm3,mm4 ; mm3=(04 05 14 15 24 25 34 35)
525 movq mm5,mm0 ; transpose coefficients(phase 2)
526 punpcklwd mm0,mm2 ; mm0=(00 01 02 03 10 11 12 13)
527 punpckhwd mm5,mm2 ; mm5=(20 21 22 23 30 31 32 33)
528 movq mm6,mm3 ; transpose coefficients(phase 2)
529 punpcklwd mm3,mm7 ; mm3=(04 05 06 07 14 15 16 17)
530 punpckhwd mm6,mm7 ; mm6=(24 25 26 27 34 35 36 37)
532 movq mm1,mm0 ; transpose coefficients(phase 3)
533 punpckldq mm0,mm3 ; mm0=(00 01 02 03 04 05 06 07)
534 punpckhdq mm1,mm3 ; mm1=(10 11 12 13 14 15 16 17)
535 movq mm4,mm5 ; transpose coefficients(phase 3)
536 punpckldq mm5,mm6 ; mm5=(20 21 22 23 24 25 26 27)
537 punpckhdq mm4,mm6 ; mm4=(30 31 32 33 34 35 36 37)
539 pushpic ebx ; save GOT address
541 mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW]
542 mov ebx, JSAMPROW [edi+1*SIZEOF_JSAMPROW]
543 movq MMWORD [edx+eax*SIZEOF_JSAMPLE], mm0
544 movq MMWORD [ebx+eax*SIZEOF_JSAMPLE], mm1
545 mov edx, JSAMPROW [edi+2*SIZEOF_JSAMPROW]
546 mov ebx, JSAMPROW [edi+3*SIZEOF_JSAMPROW]
547 movq MMWORD [edx+eax*SIZEOF_JSAMPLE], mm5
548 movq MMWORD [ebx+eax*SIZEOF_JSAMPLE], mm4
550 poppic ebx ; restore GOT address
552 add esi, byte 4*SIZEOF_FAST_FLOAT ; wsptr
553 add edi, byte 4*SIZEOF_JSAMPROW
557 emms ; empty MMX state
561 ; pop edx ; need not be preserved
562 ; pop ecx ; need not be preserved
564 mov esp,ebp ; esp <- aligned ebp
565 pop esp ; esp <- original ebp
569 ; For some reason, the OS X linker does not honor the request to align the
570 ; segment unless we do this.