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avutil/aarch64/tx_float_neon.S: clean up FFT4_X2

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This commit is contained in:
Krzysztof Pyrkosz via ffmpeg-devel
2025-02-25 21:45:56 +01:00
committed by Lynne
parent bb87d19cd9
commit 9993a64d7b
1 changed files with 8 additions and 24 deletions
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32
libavutil/aarch64/tx_float_neon.S
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@ -119,13 +119,6 @@ endconst
.endif
.endm
const shuf_4pt_x2, align=4
.byte 24, 25, 26, 27 // reg2, 3
.byte 12, 13, 14, 15 // reg1, 4
.byte 8, 9, 10, 11 // reg1, 3
.byte 28, 29, 30, 31 // reg2, 4
endconst
// Identical to FFT4, but does 2 transforms in parallel, with no deinterleaving
.macro FFT4_X2 e0, o0, e1, o1, \
t0=v16, t1=v17, t2=v18, t3=v19, t4=v20, t5=v21, t6=v22
@ -135,18 +128,17 @@ endconst
fsub \e0\().4s, \e0\().4s, \o0\().4s // t1234
fsub \e1\().4s, \e1\().4s, \o1\().4s // t1234
movrel x5, shuf_4pt_x2
rev64 \t4\().4s, \e0\().4s
rev64 \t5\().4s, \e1\().4s
zip2 \o0\().2d, \t0\().2d, \e0\().2d // t3,4 r3,4
zip2 \o1\().2d, \t2\().2d, \e1\().2d // t3,4 r3,4
zip2 \o0\().2d, \t0\().2d, \t4\().2d // t3,4 r3,4
zip2 \o1\().2d, \t2\().2d, \t5\().2d // t3,4 r3,4
ld1 { \t6\().16b }, [x5]
fneg \t3\().4s, \t4\().4s
fneg \t4\().4s, \t5\().4s
mov \o0\().d[1], \t4\().d[1]
mov \o1\().d[1], \t5\().d[1]
mov \o0\().s[3], \t3\().s[3]
mov \o1\().s[3], \t4\().s[3]
zip1 \t1\().2d, \t0\().2d, \e0\().2d // t1,2 r1,2
zip1 \t3\().2d, \t2\().2d, \e1\().2d // t1,2 r1,2
@ -156,18 +148,10 @@ endconst
fsub \t2\().4s, \t3\().4s, \o1\().4s // a34 b32
fadd \t3\().4s, \t3\().4s, \o1\().4s // a12 b14
// TODO: experiment with movs instead of tables here
tbl \o0\().16b, { \t4\().16b, \t5\().16b }, \t6\().16b // b1234
tbl \o1\().16b, { \t2\().16b, \t3\().16b }, \t6\().16b // b1234
zip1 \e0\().2d, \t5\().2d, \t4\().2d // a1234
// zip2 \o0\().2d, \t5\().2d, \t4\().2d // b1432
zip2 \o0\().2d, \t5\().2d, \t4\().2d // b1432
zip1 \e1\().2d, \t3\().2d, \t2\().2d // a1234
// zip2 \o1\().2d, \t3\().2d, \t2\().2d // b1432
// rev64 \o0\().4s, \o0\().4s // b4123
// rev64 \o1\().4s, \o1\().4s // b4123
// ext \o0\().16b, \o0\().16b, \o0\().16b, #4 // b1234
// ext \o1\().16b, \o1\().16b, \o1\().16b, #4 // b1234
zip2 \o1\().2d, \t3\().2d, \t2\().2d // b1432
.endm
const tab_8pt, align=4