242 lines
7.7 KiB
NASM
242 lines
7.7 KiB
NASM
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; Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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;
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; Use of this source code is governed by a BSD-style license
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; that can be found in the LICENSE file in the root of the source
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; tree. An additional intellectual property rights grant can be found
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; in the file PATENTS. All contributing project authors may
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; be found in the AUTHORS file in the root of the source tree.
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;
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%include "vpx_ports/x86_abi_support.asm"
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;void vp9_short_fdct4x4_mmx(short *input, short *output, int pitch)
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global sym(vp9_short_fdct4x4_mmx) PRIVATE
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sym(vp9_short_fdct4x4_mmx):
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push rbp
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mov rbp, rsp
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SHADOW_ARGS_TO_STACK 3
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GET_GOT rbx
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push rsi
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push rdi
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; end prolog
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mov rsi, arg(0) ; input
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mov rdi, arg(1) ; output
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movsxd rax, dword ptr arg(2) ;pitch
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lea rcx, [rsi + rax*2]
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; read the input data
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movq mm0, [rsi]
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movq mm1, [rsi + rax]
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movq mm2, [rcx]
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movq mm4, [rcx + rax]
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; transpose for the first stage
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movq mm3, mm0 ; 00 01 02 03
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movq mm5, mm2 ; 20 21 22 23
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punpcklwd mm0, mm1 ; 00 10 01 11
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punpckhwd mm3, mm1 ; 02 12 03 13
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punpcklwd mm2, mm4 ; 20 30 21 31
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punpckhwd mm5, mm4 ; 22 32 23 33
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movq mm1, mm0 ; 00 10 01 11
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punpckldq mm0, mm2 ; 00 10 20 30
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punpckhdq mm1, mm2 ; 01 11 21 31
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movq mm2, mm3 ; 02 12 03 13
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punpckldq mm2, mm5 ; 02 12 22 32
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punpckhdq mm3, mm5 ; 03 13 23 33
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; mm0 0
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; mm1 1
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; mm2 2
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; mm3 3
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; first stage
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movq mm5, mm0
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movq mm4, mm1
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paddw mm0, mm3 ; a1 = 0 + 3
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paddw mm1, mm2 ; b1 = 1 + 2
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psubw mm4, mm2 ; c1 = 1 - 2
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psubw mm5, mm3 ; d1 = 0 - 3
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psllw mm5, 3
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psllw mm4, 3
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psllw mm0, 3
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psllw mm1, 3
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; output 0 and 2
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movq mm2, mm0 ; a1
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paddw mm0, mm1 ; op[0] = a1 + b1
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psubw mm2, mm1 ; op[2] = a1 - b1
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; output 1 and 3
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; interleave c1, d1
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movq mm1, mm5 ; d1
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punpcklwd mm1, mm4 ; c1 d1
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punpckhwd mm5, mm4 ; c1 d1
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movq mm3, mm1
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movq mm4, mm5
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pmaddwd mm1, MMWORD PTR[GLOBAL (_5352_2217)] ; c1*2217 + d1*5352
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pmaddwd mm4, MMWORD PTR[GLOBAL (_5352_2217)] ; c1*2217 + d1*5352
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pmaddwd mm3, MMWORD PTR[GLOBAL(_2217_neg5352)] ; d1*2217 - c1*5352
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pmaddwd mm5, MMWORD PTR[GLOBAL(_2217_neg5352)] ; d1*2217 - c1*5352
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paddd mm1, MMWORD PTR[GLOBAL(_14500)]
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paddd mm4, MMWORD PTR[GLOBAL(_14500)]
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paddd mm3, MMWORD PTR[GLOBAL(_7500)]
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paddd mm5, MMWORD PTR[GLOBAL(_7500)]
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psrad mm1, 12 ; (c1 * 2217 + d1 * 5352 + 14500)>>12
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psrad mm4, 12 ; (c1 * 2217 + d1 * 5352 + 14500)>>12
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psrad mm3, 12 ; (d1 * 2217 - c1 * 5352 + 7500)>>12
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psrad mm5, 12 ; (d1 * 2217 - c1 * 5352 + 7500)>>12
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packssdw mm1, mm4 ; op[1]
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packssdw mm3, mm5 ; op[3]
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; done with vertical
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; transpose for the second stage
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movq mm4, mm0 ; 00 10 20 30
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movq mm5, mm2 ; 02 12 22 32
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punpcklwd mm0, mm1 ; 00 01 10 11
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punpckhwd mm4, mm1 ; 20 21 30 31
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punpcklwd mm2, mm3 ; 02 03 12 13
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punpckhwd mm5, mm3 ; 22 23 32 33
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movq mm1, mm0 ; 00 01 10 11
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punpckldq mm0, mm2 ; 00 01 02 03
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punpckhdq mm1, mm2 ; 01 22 12 13
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movq mm2, mm4 ; 20 31 30 31
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punpckldq mm2, mm5 ; 20 21 22 23
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punpckhdq mm4, mm5 ; 30 31 32 33
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; mm0 0
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; mm1 1
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; mm2 2
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; mm3 4
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movq mm5, mm0
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movq mm3, mm1
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paddw mm0, mm4 ; a1 = 0 + 3
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paddw mm1, mm2 ; b1 = 1 + 2
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psubw mm3, mm2 ; c1 = 1 - 2
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psubw mm5, mm4 ; d1 = 0 - 3
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pxor mm6, mm6 ; zero out for compare
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pcmpeqw mm6, mm5 ; d1 != 0
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pandn mm6, MMWORD PTR[GLOBAL(_cmp_mask)] ; clear upper,
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; and keep bit 0 of lower
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; output 0 and 2
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movq mm2, mm0 ; a1
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paddw mm0, mm1 ; a1 + b1
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psubw mm2, mm1 ; a1 - b1
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paddw mm0, MMWORD PTR[GLOBAL(_7w)]
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paddw mm2, MMWORD PTR[GLOBAL(_7w)]
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psraw mm0, 4 ; op[0] = (a1 + b1 + 7)>>4
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psraw mm2, 4 ; op[8] = (a1 - b1 + 7)>>4
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movq MMWORD PTR[rdi + 0 ], mm0
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movq MMWORD PTR[rdi + 16], mm2
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; output 1 and 3
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; interleave c1, d1
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movq mm1, mm5 ; d1
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punpcklwd mm1, mm3 ; c1 d1
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punpckhwd mm5, mm3 ; c1 d1
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movq mm3, mm1
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movq mm4, mm5
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pmaddwd mm1, MMWORD PTR[GLOBAL (_5352_2217)] ; c1*2217 + d1*5352
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pmaddwd mm4, MMWORD PTR[GLOBAL (_5352_2217)] ; c1*2217 + d1*5352
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pmaddwd mm3, MMWORD PTR[GLOBAL(_2217_neg5352)] ; d1*2217 - c1*5352
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pmaddwd mm5, MMWORD PTR[GLOBAL(_2217_neg5352)] ; d1*2217 - c1*5352
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paddd mm1, MMWORD PTR[GLOBAL(_12000)]
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paddd mm4, MMWORD PTR[GLOBAL(_12000)]
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paddd mm3, MMWORD PTR[GLOBAL(_51000)]
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paddd mm5, MMWORD PTR[GLOBAL(_51000)]
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psrad mm1, 16 ; (c1 * 2217 + d1 * 5352 + 14500)>>16
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psrad mm4, 16 ; (c1 * 2217 + d1 * 5352 + 14500)>>16
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psrad mm3, 16 ; (d1 * 2217 - c1 * 5352 + 7500)>>16
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psrad mm5, 16 ; (d1 * 2217 - c1 * 5352 + 7500)>>16
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packssdw mm1, mm4 ; op[4]
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packssdw mm3, mm5 ; op[12]
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paddw mm1, mm6 ; op[4] += (d1!=0)
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movq MMWORD PTR[rdi + 8 ], mm1
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movq MMWORD PTR[rdi + 24], mm3
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; begin epilog
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pop rdi
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pop rsi
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RESTORE_GOT
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UNSHADOW_ARGS
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pop rbp
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ret
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SECTION_RODATA
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align 8
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_5352_2217:
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dw 5352
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dw 2217
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dw 5352
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dw 2217
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align 8
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_2217_neg5352:
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dw 2217
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dw -5352
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dw 2217
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dw -5352
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align 8
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_cmp_mask:
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times 4 dw 1
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align 8
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_7w:
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times 4 dw 7
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align 8
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_14500:
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times 2 dd 14500
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align 8
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_7500:
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times 2 dd 7500
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align 8
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_12000:
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times 2 dd 12000
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align 8
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_51000:
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times 2 dd 51000
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