@/*
@ ** 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.
@ */
@                             
@**********************************************************************/
@void Filt_6k_7k(
@     Word16 signal[],                      /* input:  signal                  */
@     Word16 lg,                            /* input:  length of input         */
@     Word16 mem[]                          /* in/out: memory (size=30)        */
@)
@***********************************************************************
@ r0    ---  signal[]
@ r1    ---  lg
@ r2    ---  mem[] 

          .section  .text
          .global   Filt_6k_7k_asm
          .extern   fir_6k_7k

Filt_6k_7k_asm:

          STMFD   		r13!, {r0 - r12, r14} 
          SUB    		r13, r13, #240              @ x[L_SUBFR16k + (L_FIR - 1)]
          MOV     		r8, r0                      @ copy signal[] address
          MOV     		r5, r2                      @ copy mem[] address

          MOV     		r0, r2
          MOV     		r1, r13

	  VLD1.S16              {D0, D1, D2, D3}, [r0]!
	  VLD1.S16              {D4, D5, D6, D7}, [r0]!

	  VST1.S16              {D0, D1, D2, D3}, [r1]!
	  VST1.S16              {D4, D5, D6}, [r1]!
	  VST1.S16              D7[0], [r1]!
	  VST1.S16              D7[1], [r1]!



          LDR     		r10, Lable1                 @ get fir_7k address     
          MOV                   r3, r8                      @ change myMemCopy to Copy, due to Copy will change r3 content
          ADD     	    	r6, r13, #60                @ get x[L_FIR - 1] address
          MOV           	r7, r3                      @ get signal[i]
          @for (i = lg - 1@ i >= 0@ i--)
          @{
          @     x[i + L_FIR - 1] = signal[i] >> 2@
          @}
	  VLD1.S16              {Q0, Q1}, [r7]!		    @ signal[0]  ~ signal[15]
	  VLD1.S16              {Q2, Q3}, [r7]!             @ signal[16] ~ signal[31]
          VLD1.S16              {Q4, Q5}, [r7]!             @ signal[32] ~ signal[47]
	  VLD1.S16              {Q6, Q7}, [r7]!             @ signal[48] ~ signal[63]
	  VLD1.S16              {Q8, Q9}, [r7]!             @ signal[64] ~ signal[79]
	  VSHR.S16              Q10, Q0, #2
          VSHR.S16              Q11, Q1, #2
          VSHR.S16              Q12, Q2, #2
	  VSHR.S16              Q13, Q3, #2
	  VST1.S16              {Q10, Q11}, [r6]!
	  VSHR.S16              Q0,  Q4, #2
	  VSHR.S16              Q1,  Q5, #2
	  VSHR.S16              Q10, Q6, #2
	  VSHR.S16              Q11, Q7, #2
	  VSHR.S16              Q2,  Q8, #2
	  VSHR.S16              Q3,  Q9, #2
	  VST1.S16              {Q12, Q13}, [r6]!
	  VST1.S16              {Q0, Q1}, [r6]!
	  VST1.S16              {Q10, Q11}, [r6]!
	  VST1.S16              {Q2, Q3}, [r6]!

	  MOV                   r12, r5
          @STR     		r5, [sp, #-4]               @ PUSH  r5 to stack
          @ not use registers: r4, r10, r12, r14, r5
          MOV     		r4, r13 
          MOV     		r5, #0                      @ i = 0    
         
          @ r4 --- x[i], r10 ---- fir_6k_7k
          VLD1.S16              {Q0, Q1}, [r10]!           @fir_6k_7k[0]  ~ fir_6k_7k[15]
	  VLD1.S16              {Q2, Q3}, [r10]!           @fir_6k_7k[16] ~ fir_6k_7k[31]
          VMOV.S16              D7[3], r5                        @set fir_6k_7K = 0

	  VLD1.S16              {Q4, Q5}, [r4]!            @x[0]  ~ x[15]
	  VLD1.S16              {Q6, Q7}, [r4]!            @x[16] ~ X[31]
	  VLD1.S16              {Q8}, [r4]! 
          VMOV.S16              Q15, #0	  
          
LOOP_6K7K:

          VMULL.S16             Q9,D8,D0[0]                 
          VMULL.S16             Q10,D9,D1[0] 
          VMULL.S16             Q11,D9,D0[0]                 
          VMULL.S16             Q12,D10,D1[0]
          VEXT.8                Q4,Q4,Q5,#2
          VMLAL.S16             Q9,D10,D2[0]
          VMLAL.S16             Q10,D11,D3[0]
          VMLAL.S16             Q11,D11,D2[0]
          VMLAL.S16             Q12,D12,D3[0]    
          VEXT.8                Q5,Q5,Q6,#2
          VMLAL.S16             Q9,D12,D4[0]
          VMLAL.S16             Q10,D13,D5[0]
          VMLAL.S16             Q11,D13,D4[0]
          VMLAL.S16             Q12,D14,D5[0]
          VEXT.8                Q6,Q6,Q7,#2
          VMLAL.S16             Q9,D14,D6[0]
          VMLAL.S16             Q10,D15,D7[0]
          VMLAL.S16             Q11,D15,D6[0]
	  VMLAL.S16             Q12,D16,D7[0]
	  VEXT.8  		Q7,Q7,Q8,#2 

	  VMLAL.S16 		Q9,D8,D0[1]                
	  VMLAL.S16     	Q10,D9,D1[1]
	  VEXT.8 		Q8,Q8,Q15,#2 
	  VMLAL.S16 		Q11,D9,D0[1]                
	  VMLAL.S16 		Q12,D10,D1[1]
	  VEXT.8  		Q4,Q4,Q5,#2
	  VMLAL.S16 		Q9,D10,D2[1]
	  VMLAL.S16 		Q10,D11,D3[1]
	  VMLAL.S16 		Q11,D11,D2[1]
	  VMLAL.S16 		Q12,D12,D3[1]    
	  VEXT.8  		Q5,Q5,Q6,#2
	  VMLAL.S16 		Q9,D12,D4[1]
	  VMLAL.S16 		Q10,D13,D5[1]
	  VMLAL.S16 		Q11,D13,D4[1]
	  VMLAL.S16 		Q12,D14,D5[1]
	  VEXT.8  		Q6,Q6,Q7,#2
	  VMLAL.S16 		Q9,D14,D6[1]
	  VMLAL.S16 		Q10,D15,D7[1]
	  VMLAL.S16 		Q11,D15,D6[1]
	  VMLAL.S16 		Q12,D16,D7[1]
	  VEXT.8  		Q7,Q7,Q8,#2 

	  VMLAL.S16 		Q9,D8,D0[2]           
	  VMLAL.S16 		Q10,D9,D1[2]
	  VEXT.8 		Q8,Q8,Q15,#2 
	  VMLAL.S16 		Q11,D9,D0[2]           
	  VMLAL.S16 		Q12,D10,D1[2]
	  VEXT.8  		Q4,Q4,Q5,#2
	  VMLAL.S16 		Q9,D10,D2[2]
	  VMLAL.S16 		Q10,D11,D3[2]
	  VMLAL.S16 		Q11,D11,D2[2]
	  VMLAL.S16 		Q12,D12,D3[2]    
	  VEXT.8  		Q5,Q5,Q6,#2
	  VMLAL.S16 		Q9,D12,D4[2]
	  VMLAL.S16 		Q10,D13,D5[2]
	  VMLAL.S16 		Q11,D13,D4[2]
	  VMLAL.S16 		Q12,D14,D5[2]
	  VEXT.8  		Q6,Q6,Q7,#2
	  VMLAL.S16 		Q9,D14,D6[2]
	  VMLAL.S16 		Q10,D15,D7[2]
	  VMLAL.S16 		Q11,D15,D6[2]
	  VMLAL.S16 		Q12,D16,D7[2]
	  VEXT.8  		Q7,Q7,Q8,#2 

	  VMLAL.S16 		Q9,D8,D0[3]              
	  VMLAL.S16 		Q10,D9,D1[3]
	  VEXT.8 		Q8,Q8,Q15,#2 
	  VMLAL.S16 		Q11,D9,D0[3]              
	  VMLAL.S16 		Q12,D10,D1[3]
	  VEXT.8  		Q4,Q4,Q5,#2
	  VMLAL.S16 		Q9,D10,D2[3]
	  VMLAL.S16 		Q10,D11,D3[3]
	  VMLAL.S16 		Q11,D11,D2[3]
	  VMLAL.S16 		Q12,D12,D3[3]    
	  VEXT.8  		Q5,Q5,Q6,#2
	  VMLAL.S16 		Q9,D12,D4[3]
	  VMLAL.S16 		Q10,D13,D5[3]
	  VMLAL.S16 		Q11,D13,D4[3]
	  VMLAL.S16 		Q12,D14,D5[3]
	  VEXT.8  		Q6,Q6,Q7,#2
	  VMLAL.S16 		Q9,D14,D6[3]
	  VMLAL.S16 		Q10,D15,D7[3]
	  VMLAL.S16 		Q11,D15,D6[3]
	  VMLAL.S16 		Q12,D16,D7[3]
	  VEXT.8 		Q7,Q7,Q8,#2     

	  VMOV.S16  		D8,D9
	  VEXT.8 		Q8,Q8,Q15,#2 
	  VMOV.S16  		D9,D10
	  VADD.S32  		Q9,Q9,Q10
	  VMOV.S16  		D10,D11
	  VMOV.S16  		D11,D12
	  VADD.S32  		Q11,Q11,Q12
	  VMOV.S16  		D12,D13
	  VQRSHRN.S32 		D28,Q9,#15
	  VMOV.S16  		D13,D14
	  VMOV.S16  		D14,D15
	  VQRSHRN.S32 		D29,Q11,#15
	  VMOV.S16  		D15,D16

	  VLD1.S16  		{Q8},[r4]!
	  ADD                   r5, r5, #8
	  CMP   		r5, #80
	  VST1.S16  		{D28,D29},[r3]!
	  BLT     		LOOP_6K7K

          ADD     		r0, r13, #160               @x + lg
	  MOV                   r1, r12
	  @LDR     		r1, [sp, #-4]               @mem address

	  VLD1.S16              {D0, D1, D2, D3}, [r0]!
	  VLD1.S16              {D4, D5, D6, D7}, [r0]!

	  VST1.S16              {D0, D1, D2, D3}, [r1]!
	  VST1.S16              {D4, D5, D6}, [r1]!
	  VST1.S16              D7[0], [r1]!
	  VST1.S16              D7[1], [r1]!
                    
Filt_6k_7k_end:

          ADD     		r13, r13, #240  
          LDMFD   		r13!, {r0 - r12, r15} 
 
Lable1:
          .word   		fir_6k_7k
          @ENDFUNC
          .END