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Diffstat (limited to 'common/arm/ideint_cac_a9.s')
| -rw-r--r-- | common/arm/ideint_cac_a9.s | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/common/arm/ideint_cac_a9.s b/common/arm/ideint_cac_a9.s new file mode 100644 index 0000000..964c5e6 --- /dev/null +++ b/common/arm/ideint_cac_a9.s @@ -0,0 +1,213 @@ +@/****************************************************************************** +@ * +@ * Copyright (C) 2015 The Android Open Source Project +@ * +@ * 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. +@ * +@ ***************************************************************************** +@ * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore +@*/ + +@****************************************************************************** +@* +@* @brief +@* This file contains definitions of routines for spatial filter +@* +@* @author +@* Ittiam +@* +@* @par List of Functions: +@* - ideint_cac_8x8_a9() +@* +@* @remarks +@* None +@* +@******************************************************************************* + + +@****************************************************************************** +@* +@* @brief Calculates Combing Artifact +@* +@* @par Description +@* This functions calculates combing artifact check (CAC) for given two fields +@* +@* @param[in] pu1_top +@* UWORD8 pointer to top field +@* +@* @param[in] pu1_bot +@* UWORD8 pointer to bottom field +@* +@* @param[in] top_strd +@* Top field stride +@* +@* @param[in] bot_strd +@* Bottom field stride +@* +@* @returns +@* None +@* +@* @remarks +@* +@****************************************************************************** + + .global ideint_cac_8x8_a9 + +ideint_cac_8x8_a9: + + stmfd sp!, {r4-r10, lr} + + @ Load first row of top + vld1.u8 d28, [r0], r2 + + @ Load first row of bottom + vld1.u8 d29, [r1], r3 + + @ Load second row of top + vld1.u8 d30, [r0], r2 + + @ Load second row of bottom + vld1.u8 d31, [r1], r3 + + + @ Calculate row based adj and alt values + @ Get row sums + vpaddl.u8 q0, q14 + + vpaddl.u8 q1, q15 + + vpaddl.u16 q0, q0 + + vpaddl.u16 q1, q1 + + @ Both q0 and q1 have four 32 bit sums corresponding to first 4 rows + @ Pack q0 and q1 into a single register (sum does not exceed 16bits) + + vshl.u32 q8, q1, #16 + vorr.u32 q8, q0, q8 + @ q8 now contains 8 sums + + @ Load third row of top + vld1.u8 d24, [r0], r2 + + @ Load third row of bottom + vld1.u8 d25, [r1], r3 + + @ Load fourth row of top + vld1.u8 d26, [r0], r2 + + @ Load fourth row of bottom + vld1.u8 d27, [r1], r3 + + @ Get row sums + vpaddl.u8 q2, q12 + + vpaddl.u8 q3, q13 + + vpaddl.u16 q2, q2 + + vpaddl.u16 q3, q3 + @ Both q2 and q3 have four 32 bit sums corresponding to last 4 rows + @ Pack q2 and q3 into a single register (sum does not exceed 16bits) + + vshl.u32 q9, q3, #16 + vorr.u32 q9, q2, q9 + @ q9 now contains 8 sums + + @ Compute absolute diff between top and bottom row sums + vabd.u16 d16, d16, d17 + vabd.u16 d17, d18, d19 + + @ RSUM_CSUM_THRESH + vmov.u16 q9, #20 + + @ Eliminate values smaller than RSUM_CSUM_THRESH + vcge.u16 q10, q8, q9 + vand.u16 q10, q8, q10 + @ q10 now contains 8 absolute diff of sums above the threshold + + + @ Compute adj + vadd.u16 d20, d20, d21 + + @ d20 has four adj values for two sub-blocks + + @ Compute alt + vabd.u32 q0, q0, q1 + vabd.u32 q2, q2, q3 + + vadd.u32 q0, q0, q2 + vadd.u32 d21, d0, d1 + @ d21 has two values for two sub-blocks + + + @ Calculate column based adj and alt values + + vrhadd.u8 q0, q14, q15 + vrhadd.u8 q1, q12, q13 + vrhadd.u8 q0, q0, q1 + + vabd.u8 d0, d0, d1 + + @ RSUM_CSUM_THRESH >> 2 + vmov.u8 d9, #5 + + @ Eliminate values smaller than RSUM_CSUM_THRESH >> 2 + vcge.u8 d1, d0, d9 + vand.u8 d0, d0, d1 + @ d0 now contains 8 absolute diff of sums above the threshold + + + vpaddl.u8 d0, d0 + vshl.u16 d0, d0, #2 + + @ Add row based adj + vadd.u16 d20, d0, d20 + + vpaddl.u16 d20, d20 + @ d20 now contains 2 adj values + + + vrhadd.u8 d0, d28, d29 + vrhadd.u8 d2, d24, d25 + vrhadd.u8 d0, d0, d2 + + vrhadd.u8 d1, d30, d31 + vrhadd.u8 d3, d26, d27 + vrhadd.u8 d1, d1, d3 + + vabd.u8 d0, d0, d1 + vpaddl.u8 d0, d0 + + vshl.u16 d0, d0, #2 + vpaddl.u16 d0, d0 + vadd.u32 d21, d0, d21 + + + @ d21 now contains 2 alt values + + @ SAD_BIAS_MULT_SHIFT + vshr.u32 d0, d21, #3 + vadd.u32 d21, d21, d0 + + @ SAD_BIAS_ADDITIVE >> 1 + vmov.u32 d0, #4 + vadd.u32 d21, d21, d0 + + vclt.u32 d0, d21, d20 + vpaddl.u32 d0, d0 + + vmov.u32 r0, d0[0] + cmp r0, #0 + movne r0, #1 + ldmfd sp!, {r4-r10, pc} |