2020-06-16 13:38:43 +00:00
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/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
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2020-06-15 14:18:57 +00:00
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│vi: set et ft=asm ts=8 tw=8 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/macros.h"
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.align 16
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stbi__YCbCr_to_RGB_row$sse2:
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.leafprologue
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.profilable
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xor %eax,%eax
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cmp $8,%r8d
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jl 1f
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xor %eax,%eax
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movdqa 2f(%rip),%xmm2
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movdqa 3f(%rip),%xmm8
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movdqa 4f(%rip),%xmm9
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movdqa 5f(%rip),%xmm10
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movdqa 6f(%rip),%xmm4
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movdqa 7f(%rip),%xmm5
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.align 16
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0: movq (%rsi,%rax),%xmm6
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movq (%rcx,%rax),%xmm7
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movq (%rdx,%rax),%xmm1
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movdqa %xmm2,%xmm0
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punpcklbw %xmm6,%xmm0
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pxor %xmm2,%xmm7
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pxor %xmm6,%xmm6
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punpcklbw %xmm7,%xmm6
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pxor %xmm2,%xmm1
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pxor %xmm3,%xmm3
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punpcklbw %xmm1,%xmm3
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psrlw $4,%xmm0
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movdqa %xmm6,%xmm7
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pmulhw %xmm8,%xmm7
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movdqa %xmm3,%xmm1
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pmulhw %xmm9,%xmm1
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pmulhw %xmm10,%xmm3
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pmulhw %xmm4,%xmm6
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paddw %xmm1,%xmm6
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paddw %xmm0,%xmm7
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paddw %xmm0,%xmm3
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paddw %xmm0,%xmm6
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psraw $4,%xmm7
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psraw $4,%xmm3
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packuswb %xmm3,%xmm7
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psraw $4,%xmm6
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packuswb %xmm5,%xmm6
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movdqa %xmm7,%xmm0
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punpcklbw %xmm6,%xmm0
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punpckhbw %xmm6,%xmm7
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movdqa %xmm0,%xmm1
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punpcklwd %xmm7,%xmm1
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punpckhwd %xmm7,%xmm0
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movdqu %xmm1,(%rdi,%rax,4)
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movdqu %xmm0,16(%rdi,%rax,4)
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add $8,%rax
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lea 7(%rax),%r9d
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cmp %r8d,%r9d
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jl 0b
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1: .leafepilogue
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.endfn stbi__YCbCr_to_RGB_row$sse2,globl
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.rodata.cst16
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2: .byte 128,128,128,128,128,128,128,128
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.zero 8
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3: .short 5743,5743,5743,5743,5743,5743,5743,5743
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4: .short 64126,64126,64126,64126,64126,64126,64126,64126
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5: .short 7258,7258,7258,7258,7258,7258,7258,7258
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6: .short 62611,62611,62611,62611,62611,62611,62611,62611
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7: .short 255,255,255,255,255,255,255,255
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.end
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/ These should be better but need to get them to work
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3: .short 11485,11485,11485,11485,11485,11485,11485,11485 # J′R m=13 99.964387%
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4: .short -11277,-11277,-11277,-11277,-11277,-11277,-11277,-11277 # J′G m=15 99.935941%
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5: .short 14516,14516,14516,14516,14516,14516,14516,14516 # J′B m=13 99.947219%
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6: .short -23401,-23401,-23401,-23401,-23401,-23401,-23401,-23401 # J′G m=15 99.935941%
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7: .short 255,255,255,255,255,255,255,255
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