148 lines
3.4 KiB
ArmAsm
148 lines
3.4 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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.p2align 2
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.global ixheaacd_scale_factor_process_armv7
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ixheaacd_scale_factor_process_armv7:
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STMFD sp!, {r4-r12, r14}
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LDR r9, [sp, #0x28]
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LDR r11, [sp, #0x2c]
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CMP r2, #0
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BLE END
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MOV r10, #0
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CMP r11, #2
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MOVLE r11, #0x25
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MOVGT r11, #0x22
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TBANDS_LOOP:
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LDRSH r5, [r1], #2
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LDRB r4, [r3], #1
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LDR r6, [sp, #0x30]
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LDR r7, [sp, #0x34]
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CMP r5, #0x18
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BGE SCALE_FACTOR_GE_12
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CMP r4, #0
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BLE OFFSET_ZERO
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SCALE_FACTOR_LT_12:
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STR r10, [r0], #4
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STR r10, [r0], #4
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STR r10, [r0], #4
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STR r10, [r0], #4
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SUBS r4, r4, #4
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BGT SCALE_FACTOR_LT_12
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B OFFSET_ZERO
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SCALE_FACTOR_GE_12:
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SUBS r6, r11, r5, ASR #2
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AND r5, r5, #3
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LDR r5, [r9, r5, LSL #2]
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BLE SHIFT_LE_ZERO
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SUB r14, r6, #1
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SHIFT_POSITIVE:
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LDRD r6, [r0, #0]
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SMULWB r6, r6, r5
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SMULWB r7, r7, r5
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MOV r6, r6, ASR r14
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MOV r7, r7, ASR r14
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STRD r6, [r0], #8
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LDRD r6, [r0, #0]
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SMULWB r6, r6, r5
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SMULWB r7, r7, r5
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SUBS r4, r4, #4
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MOV r6, r6, ASR r14
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MOV r7, r7, ASR r14
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STRD r6, [r0], #8
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BGT SHIFT_POSITIVE
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B OFFSET_ZERO
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SHIFT_LE_ZERO:
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RSBS r14, r6, #0
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BGT SHIFT_NEGTIVE1
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SHIFT_ZERO:
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LDRD r6, [r0, #0]
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SMULWB r6, r6, r5
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SMULWB r7, r7, r5
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MOV r6, r6, LSL #1
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MOV r7, r7, LSL #1
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STRD r6, [r0], #8
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SUBS r4, r4, #2
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BGT SHIFT_ZERO
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B OFFSET_ZERO
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SHIFT_NEGTIVE1:
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SUB r14, r14, #1
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SHIFT_NEGTIVE:
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LDRD r6, [r0, #0]
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MOV r6, r6, LSL r14
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MOV r7, r7, LSL r14
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SMULWB r6, r6, r5
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SMULWB r7, r7, r5
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MOV r6, r6, LSL #2
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MOV r7, r7, LSL #2
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STRD r6, [r0], #8
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SUBS r4, r4, #2
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BGT SHIFT_NEGTIVE
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OFFSET_ZERO:
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SUBS r2, r2, #1
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BGT TBANDS_LOOP
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END:
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LDMFD sp!, {r4-r12, r15}
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