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|
;//
;//
;// File Name: armVCM4P10_InterpolateLuma_HalfHor4x4_unsafe_s.s
;// OpenMAX DL: v1.0.2
;// Revision: 9641
;// Date: Thursday, February 7, 2008
;//
;// (c) Copyright 2007-2008 ARM Limited. All Rights Reserved.
;//
;//
;//
INCLUDE omxtypes_s.h
INCLUDE armCOMM_s.h
M_VARIANTS ARM1136JS
EXPORT armVCM4P10_InterpolateLuma_HalfHor4x4_unsafe
DEBUG_ON SETL {FALSE}
IF ARM1136JS
;// Function:
;// armVCM4P10_InterpolateLuma_HalfHor4x4_unsafe
;//
;// Implements horizontal interpolation for a block of size 4x4. Input and output should
;// be aligned.
;//
;// Registers used as input for this function
;// r0,r1,r2,r3 where r0,r2 input pointer and r1,r3 corresponding step size
;//
;// Registers preserved for top level function
;// r0,r1,r2,r3,r4,r5,r6,r14
;//
;// Registers modified by the function
;// r7,r8,r9,r10,r11,r12
;//
;// Output registers
;// None. Function will preserve r0-r3
;// Declare input registers
pSrc RN 0
srcStep RN 1
pDst RN 2
dstStep RN 3
;// Declare inner loop registers
Acc0 RN 4
Acc1 RN 5
Acc2 RN 6
Acc3 RN 7
ValA RN 4
ValB RN 5
ValC RN 6
ValD RN 7
ValE RN 8
ValF RN 9
ValG RN 12
ValH RN 14
ValI RN 1
Temp1 RN 3
Temp2 RN 1
Temp3 RN 12
Temp4 RN 7
Temp5 RN 5
r0x0fe00fe0 RN 3 ;// [0 (16*255 - 16) 0 (16*255 - 16)]
r0x00ff00ff RN 10 ;// [0 255 0 255] where 255 is offset
Counter RN 11
Height RN 3
M_ALLOC4 pDstStep, 4
M_ALLOC4 pSrcStep, 4
;// Function header
M_START armVCM4P10_InterpolateLuma_HalfHor4x4_unsafe, r6
MOV Counter, #2
M_STR dstStep, pDstStep
M_STR srcStep, pSrcStep
LDR r0x00ff00ff, =0x00ff00ff ;// [0 255 0 255] 255 is offset to avoid negative results
NextTwoRowsLoop
LDR ValD, [pSrc, srcStep] ;// Load row 1 [d1 c1 b1 a1]
LDR ValA, [pSrc], #4 ;// Load row 0 [d0 c0 b0 a0]
LDR ValH, [pSrc, srcStep] ;// Load [h1 g1 f1 e1]
LDR ValE, [pSrc], #4 ;// Load [h0 g0 f0 e0]
LDRB Temp2, [pSrc, srcStep] ;// Load row 1 [l1 k1 j1 i1]
LDRB Temp1, [pSrc], #-8 ;// Load row 0 [l0 k0 j0 i0]
PKHBT ValB, ValA, ValD, LSL #16 ;// [b1 a1 b0 a0]
PKHTB ValD, ValD, ValA, ASR #16 ;// [d1 c1 d0 c0]
UXTAB16 ValA, r0x00ff00ff, ValB ;// [00 a1 00 a0] + [0 255 0 255]
UXTAB16 ValC, r0x00ff00ff, ValD ;// [00 c1 00 c0] + [0 255 0 255]
PKHBT ValI, Temp1, Temp2, LSL #16 ;// [00 i1 00 i0]
PKHBT ValF, ValE, ValH, LSL #16 ;// [f1 e1 f0 e0]
PKHTB ValH, ValH, ValE, ASR #16 ;// [h1 g1 h0 g0]
UXTAB16 ValE, r0x00ff00ff, ValF ;// [00 e1 00 e0] + [0 255 0 255]
;// Calculate Acc0
;// Acc0 = a - 5*b + 20*c + 20*d - 5*e + f
UXTAB16 Temp1, ValC, ValD, ROR #8
UXTAB16 Temp3, ValE, ValB, ROR #8
RSB Temp1, Temp3, Temp1, LSL #2
UXTAB16 Acc0, ValA, ValF, ROR #8
ADD Temp1, Temp1, Temp1, LSL #2
ADD Acc0, Acc0, Temp1
;// Calculate Acc1
;// Acc1 = b - 5*c + 20*d + 20*e - 5*f + g
UXTAB16 Temp1, ValE, ValD, ROR #8
UXTAB16 Temp3, ValC, ValF, ROR #8
RSB Temp1, Temp3, Temp1, LSL #2
UXTAB16 ValG, r0x00ff00ff, ValH ;// [00 g1 00 g0] + [0 255 0 255]
ADD Temp1, Temp1, Temp1, LSL #2
UXTAB16 Acc1, ValG, ValB, ROR #8
ADD Acc1, Acc1, Temp1
LDR r0x0fe00fe0, =0x0fe00fe0 ;// 0x0fe00fe0 = (16 * Offset) - 16 where Offset is 255
UXTAB16 Acc2, ValC, ValH, ROR #8
ADD ValI, r0x00ff00ff, ValI ;// [00 i1 00 i0] + [0 255 0 255]
UQSUB16 Acc0, Acc0, r0x0fe00fe0
UQSUB16 Acc1, Acc1, r0x0fe00fe0
USAT16 Acc0, #13, Acc0
USAT16 Acc1, #13, Acc1
;// Calculate Acc2
;// Acc2 = c - 5*d + 20*e + 20*f - 5*g + h
UXTAB16 Temp1, ValG, ValD, ROR #8
UXTAB16 Acc3, ValI, ValD, ROR #8
UXTAB16 Temp2, ValE, ValF, ROR #8
AND Acc1, r0x00ff00ff, Acc1, LSR #5
AND Acc0, r0x00ff00ff, Acc0, LSR #5
ORR Acc0, Acc0, Acc1, LSL #8
RSB Temp5, Temp1, Temp2, LSL #2
UXTAB16 Temp2, ValG, ValF, ROR #8
ADD Temp5, Temp5, Temp5, LSL #2
ADD Acc2, Acc2, Temp5
;// Calculate Acc3
;// Acc3 = d - 5*e + 20*f + 20*g - 5*h + i
UXTAB16 Temp5, ValE, ValH, ROR #8
RSB Temp5, Temp5, Temp2, LSL #2
LDR r0x0fe00fe0, =0x0fe00fe0
ADD Temp5, Temp5, Temp5, LSL #2
ADD Acc3, Acc3, Temp5
UQSUB16 Acc3, Acc3, r0x0fe00fe0
UQSUB16 Acc2, Acc2, r0x0fe00fe0
USAT16 Acc3, #13, Acc3
USAT16 Acc2, #13, Acc2
M_LDR dstStep, pDstStep
AND Acc3, r0x00ff00ff, Acc3, LSR #5
AND Acc2, r0x00ff00ff, Acc2, LSR #5
ORR Acc2, Acc2, Acc3, LSL #8
SUBS Counter, Counter, #1
M_LDR srcStep, pSrcStep
PKHBT Acc1, Acc0, Acc2, LSL #16
M_STR Acc1, [pDst], dstStep ;// Store result1
PKHTB Acc2, Acc2, Acc0, ASR #16
M_STR Acc2, [pDst], dstStep ;// Store result2
ADD pSrc, pSrc, srcStep, LSL #1
BGT NextTwoRowsLoop
End
SUB pDst, pDst, dstStep, LSL #2
SUB pSrc, pSrc, srcStep, LSL #2
M_END
ENDIF
END
|
