| ; |
| ; Copyright (c) 2011 The WebM project authors. All Rights Reserved. |
| ; |
| ; Use of this source code is governed by a BSD-style license |
| ; that can be found in the LICENSE file in the root of the source |
| ; tree. An additional intellectual property rights grant can be found |
| ; in the file PATENTS. All contributing project authors may |
| ; be found in the AUTHORS file in the root of the source tree. |
| ; |
| |
| |
| EXPORT |vp8_fast_quantize_b_neon| |
| EXPORT |vp8_fast_quantize_b_pair_neon| |
| |
| INCLUDE asm_enc_offsets.asm |
| |
| ARM |
| REQUIRE8 |
| PRESERVE8 |
| |
| AREA ||.text||, CODE, READONLY, ALIGN=4 |
| |
| ;vp8_fast_quantize_b_pair_neon(BLOCK *b1, BLOCK *b2, BLOCKD *d1, BLOCKD *d2); |
| |vp8_fast_quantize_b_pair_neon| PROC |
| |
| stmfd sp!, {r4-r9} |
| vstmdb sp!, {q4-q7} |
| |
| ldr r4, [r0, #vp8_block_coeff] |
| ldr r5, [r0, #vp8_block_quant_fast] |
| ldr r6, [r0, #vp8_block_round] |
| |
| vld1.16 {q0, q1}, [r4@128] ; load z |
| |
| ldr r7, [r2, #vp8_blockd_qcoeff] |
| |
| vabs.s16 q4, q0 ; calculate x = abs(z) |
| vabs.s16 q5, q1 |
| |
| ;right shift 15 to get sign, all 0 if it is positive, all 1 if it is negative |
| vshr.s16 q2, q0, #15 ; sz |
| vshr.s16 q3, q1, #15 |
| |
| vld1.s16 {q6, q7}, [r6@128] ; load round_ptr [0-15] |
| vld1.s16 {q8, q9}, [r5@128] ; load quant_ptr [0-15] |
| |
| ldr r4, [r1, #vp8_block_coeff] |
| |
| vadd.s16 q4, q6 ; x + Round |
| vadd.s16 q5, q7 |
| |
| vld1.16 {q0, q1}, [r4@128] ; load z2 |
| |
| vqdmulh.s16 q4, q8 ; y = ((Round+abs(z)) * Quant) >> 16 |
| vqdmulh.s16 q5, q9 |
| |
| vabs.s16 q10, q0 ; calculate x2 = abs(z_2) |
| vabs.s16 q11, q1 |
| vshr.s16 q12, q0, #15 ; sz2 |
| vshr.s16 q13, q1, #15 |
| |
| ;modify data to have its original sign |
| veor.s16 q4, q2 ; y^sz |
| veor.s16 q5, q3 |
| |
| vadd.s16 q10, q6 ; x2 + Round |
| vadd.s16 q11, q7 |
| |
| ldr r8, [r2, #vp8_blockd_dequant] |
| |
| vqdmulh.s16 q10, q8 ; y2 = ((Round+abs(z)) * Quant) >> 16 |
| vqdmulh.s16 q11, q9 |
| |
| vshr.s16 q4, #1 ; right shift 1 after vqdmulh |
| vshr.s16 q5, #1 |
| |
| vld1.s16 {q6, q7}, [r8@128] ;load dequant_ptr[i] |
| |
| vsub.s16 q4, q2 ; x1=(y^sz)-sz = (y^sz)-(-1) (2's complement) |
| vsub.s16 q5, q3 |
| |
| vshr.s16 q10, #1 ; right shift 1 after vqdmulh |
| vshr.s16 q11, #1 |
| |
| ldr r9, [r2, #vp8_blockd_dqcoeff] |
| |
| veor.s16 q10, q12 ; y2^sz2 |
| veor.s16 q11, q13 |
| |
| vst1.s16 {q4, q5}, [r7] ; store: qcoeff = x1 |
| |
| |
| vsub.s16 q10, q12 ; x2=(y^sz)-sz = (y^sz)-(-1) (2's complement) |
| vsub.s16 q11, q13 |
| |
| ldr r6, [r3, #vp8_blockd_qcoeff] |
| |
| vmul.s16 q2, q6, q4 ; x * Dequant |
| vmul.s16 q3, q7, q5 |
| |
| ldr r0, _inv_zig_zag_ ; load ptr of inverse zigzag table |
| |
| vceq.s16 q8, q8 ; set q8 to all 1 |
| |
| vst1.s16 {q10, q11}, [r6] ; store: qcoeff = x2 |
| |
| vmul.s16 q12, q6, q10 ; x2 * Dequant |
| vmul.s16 q13, q7, q11 |
| |
| vld1.16 {q6, q7}, [r0@128] ; load inverse scan order |
| |
| vtst.16 q14, q4, q8 ; now find eob |
| vtst.16 q15, q5, q8 ; non-zero element is set to all 1 |
| |
| vst1.s16 {q2, q3}, [r9] ; store dqcoeff = x * Dequant |
| |
| ldr r7, [r3, #vp8_blockd_dqcoeff] |
| |
| vand q0, q6, q14 ; get all valid numbers from scan array |
| vand q1, q7, q15 |
| |
| vst1.s16 {q12, q13}, [r7] ; store dqcoeff = x * Dequant |
| |
| vtst.16 q2, q10, q8 ; now find eob |
| vtst.16 q3, q11, q8 ; non-zero element is set to all 1 |
| |
| vmax.u16 q0, q0, q1 ; find maximum value in q0, q1 |
| |
| vand q10, q6, q2 ; get all valid numbers from scan array |
| vand q11, q7, q3 |
| vmax.u16 q10, q10, q11 ; find maximum value in q10, q11 |
| |
| vmax.u16 d0, d0, d1 |
| vmax.u16 d20, d20, d21 |
| vmovl.u16 q0, d0 |
| vmovl.u16 q10, d20 |
| |
| vmax.u32 d0, d0, d1 |
| vmax.u32 d20, d20, d21 |
| vpmax.u32 d0, d0, d0 |
| vpmax.u32 d20, d20, d20 |
| |
| ldr r4, [r2, #vp8_blockd_eob] |
| ldr r5, [r3, #vp8_blockd_eob] |
| |
| vst1.8 {d0[0]}, [r4] ; store eob |
| vst1.8 {d20[0]}, [r5] ; store eob |
| |
| vldmia sp!, {q4-q7} |
| ldmfd sp!, {r4-r9} |
| bx lr |
| |
| ENDP |
| |
| ;void vp8_fast_quantize_b_c(BLOCK *b, BLOCKD *d) |
| |vp8_fast_quantize_b_neon| PROC |
| |
| stmfd sp!, {r4-r7} |
| |
| ldr r3, [r0, #vp8_block_coeff] |
| ldr r4, [r0, #vp8_block_quant_fast] |
| ldr r5, [r0, #vp8_block_round] |
| |
| vld1.16 {q0, q1}, [r3@128] ; load z |
| vorr.s16 q14, q0, q1 ; check if all zero (step 1) |
| ldr r6, [r1, #vp8_blockd_qcoeff] |
| ldr r7, [r1, #vp8_blockd_dqcoeff] |
| vorr.s16 d28, d28, d29 ; check if all zero (step 2) |
| |
| vabs.s16 q12, q0 ; calculate x = abs(z) |
| vabs.s16 q13, q1 |
| |
| ;right shift 15 to get sign, all 0 if it is positive, all 1 if it is negative |
| vshr.s16 q2, q0, #15 ; sz |
| vmov r2, r3, d28 ; check if all zero (step 3) |
| vshr.s16 q3, q1, #15 |
| |
| vld1.s16 {q14, q15}, [r5@128]; load round_ptr [0-15] |
| vld1.s16 {q8, q9}, [r4@128] ; load quant_ptr [0-15] |
| |
| vadd.s16 q12, q14 ; x + Round |
| vadd.s16 q13, q15 |
| |
| ldr r0, _inv_zig_zag_ ; load ptr of inverse zigzag table |
| |
| vqdmulh.s16 q12, q8 ; y = ((Round+abs(z)) * Quant) >> 16 |
| vqdmulh.s16 q13, q9 |
| |
| vld1.16 {q10, q11}, [r0@128]; load inverse scan order |
| |
| vceq.s16 q8, q8 ; set q8 to all 1 |
| |
| ldr r4, [r1, #vp8_blockd_dequant] |
| |
| vshr.s16 q12, #1 ; right shift 1 after vqdmulh |
| vshr.s16 q13, #1 |
| |
| ldr r5, [r1, #vp8_blockd_eob] |
| |
| orr r2, r2, r3 ; check if all zero (step 4) |
| cmp r2, #0 ; check if all zero (step 5) |
| beq zero_output ; check if all zero (step 6) |
| |
| ;modify data to have its original sign |
| veor.s16 q12, q2 ; y^sz |
| veor.s16 q13, q3 |
| |
| vsub.s16 q12, q2 ; x1=(y^sz)-sz = (y^sz)-(-1) (2's complement) |
| vsub.s16 q13, q3 |
| |
| vld1.s16 {q2, q3}, [r4@128] ; load dequant_ptr[i] |
| |
| vtst.16 q14, q12, q8 ; now find eob |
| vtst.16 q15, q13, q8 ; non-zero element is set to all 1 |
| |
| vst1.s16 {q12, q13}, [r6@128]; store: qcoeff = x1 |
| |
| vand q10, q10, q14 ; get all valid numbers from scan array |
| vand q11, q11, q15 |
| |
| |
| vmax.u16 q0, q10, q11 ; find maximum value in q0, q1 |
| vmax.u16 d0, d0, d1 |
| vmovl.u16 q0, d0 |
| |
| vmul.s16 q2, q12 ; x * Dequant |
| vmul.s16 q3, q13 |
| |
| vmax.u32 d0, d0, d1 |
| vpmax.u32 d0, d0, d0 |
| |
| vst1.s16 {q2, q3}, [r7@128] ; store dqcoeff = x * Dequant |
| |
| vst1.8 {d0[0]}, [r5] ; store eob |
| |
| ldmfd sp!, {r4-r7} |
| bx lr |
| |
| zero_output |
| strb r2, [r5] ; store eob |
| vst1.s16 {q0, q1}, [r6@128] ; qcoeff = 0 |
| vst1.s16 {q0, q1}, [r7@128] ; dqcoeff = 0 |
| |
| ldmfd sp!, {r4-r7} |
| bx lr |
| |
| ENDP |
| |
| ; default inverse zigzag table is defined in vp8/common/entropy.c |
| _inv_zig_zag_ |
| DCD inv_zig_zag |
| |
| ALIGN 16 ; enable use of @128 bit aligned loads |
| inv_zig_zag |
| DCW 0x0001, 0x0002, 0x0006, 0x0007 |
| DCW 0x0003, 0x0005, 0x0008, 0x000d |
| DCW 0x0004, 0x0009, 0x000c, 0x000e |
| DCW 0x000a, 0x000b, 0x000f, 0x0010 |
| |
| END |
| |
