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@/*
@ ** Copyright 2003-2010, VisualOn, Inc.
@ **
@ ** Licensed under the Apache License, Version 2.0 (the "License");
@ ** you may not use this file except in compliance with the License.
@ ** You may obtain a copy of the License at
@ **
@ ** http://www.apache.org/licenses/LICENSE-2.0
@ **
@ ** Unless required by applicable law or agreed to in writing, software
@ ** distributed under the License is distributed on an "AS IS" BASIS,
@ ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@ ** See the License for the specific language governing permissions and
@ ** limitations under the License.
@ */
@
@**********************************************************************/
@Word32 Dot_product12( /* (o) Q31: normalized result (1 < val <= -1) */
@ Word16 x[], /* (i) 12bits: x vector */
@ Word16 y[], /* (i) 12bits: y vector */
@ Word16 lg, /* (i) : vector length */
@ Word16 * exp /* (o) : exponent of result (0..+30) */
@)
@************************************************************************
@ x[] --- r0
@ y[] --- r1
@ lg --- r2
@ *exp --- r3
.section .text
.global Dot_product12_asm
Dot_product12_asm:
STMFD r13!, {r4 - r12, r14}
CMP r0, r1
BEQ LOOP_EQ
VLD1.S16 {Q0, Q1}, [r0]! @load 16 Word16 x[]
VLD1.S16 {Q2, Q3}, [r0]! @load 16 Word16 x[]
VLD1.S16 {Q4, Q5}, [r0]! @load 16 Word16 x[]
VLD1.S16 {Q6, Q7}, [r0]! @load 16 Word16 x[]
VLD1.S16 {Q8, Q9}, [r1]! @load 16 Word16 y[]
VLD1.S16 {Q10, Q11}, [r1]! @load 16 Word16 y[]
VLD1.S16 {Q12, Q13}, [r1]! @load 16 Word16 y[]
VMULL.S16 Q15, D16, D0
VMLAL.S16 Q15, D17, D1
VMLAL.S16 Q15, D18, D2
VMLAL.S16 Q15, D19, D3
VLD1.S16 {Q0, Q1}, [r1]! @load 16 Word16 y[]
VMLAL.S16 Q15, D20, D4
VMLAL.S16 Q15, D21, D5
VMLAL.S16 Q15, D22, D6
VMLAL.S16 Q15, D23, D7
VMLAL.S16 Q15, D24, D8
VMLAL.S16 Q15, D25, D9
VMLAL.S16 Q15, D26, D10
VMLAL.S16 Q15, D27, D11
VMLAL.S16 Q15, D0, D12
VMLAL.S16 Q15, D1, D13
VMLAL.S16 Q15, D2, D14
VMLAL.S16 Q15, D3, D15
CMP r2, #64
BEQ Lable1
VLD1.S16 {Q0, Q1}, [r0]! @load 16 Word16 x[]
VLD1.S16 {Q2, Q3}, [r1]!
VMLAL.S16 Q15, D4, D0
VMLAL.S16 Q15, D5, D1
VMLAL.S16 Q15, D6, D2
VMLAL.S16 Q15, D7, D3
BL Lable1
LOOP_EQ:
VLD1.S16 {Q0, Q1}, [r0]!
VLD1.S16 {Q2, Q3}, [r0]!
VLD1.S16 {Q4, Q5}, [r0]!
VLD1.S16 {Q6, Q7}, [r0]!
VMULL.S16 Q15, D0, D0
VMLAL.S16 Q15, D1, D1
VMLAL.S16 Q15, D2, D2
VMLAL.S16 Q15, D3, D3
VMLAL.S16 Q15, D4, D4
VMLAL.S16 Q15, D5, D5
VMLAL.S16 Q15, D6, D6
VMLAL.S16 Q15, D7, D7
VMLAL.S16 Q15, D8, D8
VMLAL.S16 Q15, D9, D9
VMLAL.S16 Q15, D10, D10
VMLAL.S16 Q15, D11, D11
VMLAL.S16 Q15, D12, D12
VMLAL.S16 Q15, D13, D13
VMLAL.S16 Q15, D14, D14
VMLAL.S16 Q15, D15, D15
CMP r2, #64
BEQ Lable1
VLD1.S16 {Q0, Q1}, [r0]!
VMLAL.S16 Q15, D0, D0
VMLAL.S16 Q15, D1, D1
VMLAL.S16 Q15, D2, D2
VMLAL.S16 Q15, D3, D3
Lable1:
VQADD.S32 D30, D30, D31
VPADD.S32 D30, D30, D30
VMOV.S32 r12, D30[0]
ADD r12, r12, r12
ADD r12, r12, #1 @ L_sum = (L_sum << 1) + 1
MOV r4, r12
CMP r12, #0
RSBLT r4, r12, #0
CLZ r10, r4
SUB r10, r10, #1 @ sft = norm_l(L_sum)
MOV r0, r12, LSL r10 @ L_sum = L_sum << sft
RSB r11, r10, #30 @ *exp = 30 - sft
STRH r11, [r3]
Dot_product12_end:
LDMFD r13!, {r4 - r12, r15}
.end
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