83 lines
2.1 KiB
ArmAsm
83 lines
2.1 KiB
ArmAsm
///******************************************************************************
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// *
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// * Copyright (C) 2018 The Android Open Source Project
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// *
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// * Licensed under the Apache License, Version 2.0 (the "License");
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// * you may not use this file except in compliance with the License.
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// * You may obtain a copy of the License at:
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// *
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// * http://www.apache.org/licenses/LICENSE-2.0
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// *
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// * Unless required by applicable law or agreed to in writing, software
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// * distributed under the License is distributed on an "AS IS" BASIS,
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// * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// * See the License for the specific language governing permissions and
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// * limitations under the License.
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// *
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// *****************************************************************************
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// * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
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//*/
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.text
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.global ixheaacd_calc_max_spectral_line_armv8
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ixheaacd_calc_max_spectral_line_armv8:
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LSR W4, W1, #3
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LSL W6, W4, #3
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MOV w11, #0x00000000
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MOV V3.S[0], w11
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MOV V3.S[1], w11
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MOV V3.S[2], w11
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MOV V3.S[3], w11
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LOOP_1:
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LD1 {V0.4S}, [X0], #16
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LD1 {V1.4S}, [X0], #16
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ABS V0.4S, V0.4S
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ABS V1.4S, V1.4S
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SUBS W4, W4, #1
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ORR V3.16B, V0.16B, V3.16B
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ORR V3.16B, V1.16B, V3.16B
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BGT LOOP_1
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SUBS W7, W1, W6
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MOV W4, V3.S[0]
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MOV W1, V3.S[1]
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MOV W2, V3.S[2]
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ORR W4, W4, W1
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MOV W3, V3.S[3]
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ORR W4, W4, W2
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ORR W4, W4, W3
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BEQ END_FUNC
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LOOP_2:
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LDR W2, [X0], #4
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CMP W2, #0
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CNEG W2, W2, LE
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ORR W4, W4, W2
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SUBS W7, W7, #1
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BGT LOOP_2
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END_FUNC:
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MOV W0, W4
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CMP W0, #0
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CNEG W0, W0, LE
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CLZ W0, W0
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SUB W0, W0, #1
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RET
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