diff options
Diffstat (limited to 'libvpx/vp9/common/arm/neon/vp9_short_idct32x32_1_add_neon.asm')
| -rw-r--r-- | libvpx/vp9/common/arm/neon/vp9_short_idct32x32_1_add_neon.asm | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/libvpx/vp9/common/arm/neon/vp9_short_idct32x32_1_add_neon.asm b/libvpx/vp9/common/arm/neon/vp9_short_idct32x32_1_add_neon.asm new file mode 100644 index 0000000..d290d07 --- /dev/null +++ b/libvpx/vp9/common/arm/neon/vp9_short_idct32x32_1_add_neon.asm @@ -0,0 +1,144 @@ +; +; Copyright (c) 2013 The WebM project authors. All Rights Reserved. +; +; Use of this source code is governed by a BSD-style license and patent +; grant that can be found in the LICENSE file in the root of the source +; tree. All contributing project authors may be found in the AUTHORS +; file in the root of the source tree. +; + + EXPORT |vp9_idct32x32_1_add_neon| + ARM + REQUIRE8 + PRESERVE8 + + AREA ||.text||, CODE, READONLY, ALIGN=2 + + ;TODO(hkuang): put the following macros in a seperate + ;file so other idct function could also use them. + MACRO + LD_16x8 $src, $stride + vld1.8 {q8}, [$src], $stride + vld1.8 {q9}, [$src], $stride + vld1.8 {q10}, [$src], $stride + vld1.8 {q11}, [$src], $stride + vld1.8 {q12}, [$src], $stride + vld1.8 {q13}, [$src], $stride + vld1.8 {q14}, [$src], $stride + vld1.8 {q15}, [$src], $stride + MEND + + MACRO + ADD_DIFF_16x8 $diff + vqadd.u8 q8, q8, $diff + vqadd.u8 q9, q9, $diff + vqadd.u8 q10, q10, $diff + vqadd.u8 q11, q11, $diff + vqadd.u8 q12, q12, $diff + vqadd.u8 q13, q13, $diff + vqadd.u8 q14, q14, $diff + vqadd.u8 q15, q15, $diff + MEND + + MACRO + SUB_DIFF_16x8 $diff + vqsub.u8 q8, q8, $diff + vqsub.u8 q9, q9, $diff + vqsub.u8 q10, q10, $diff + vqsub.u8 q11, q11, $diff + vqsub.u8 q12, q12, $diff + vqsub.u8 q13, q13, $diff + vqsub.u8 q14, q14, $diff + vqsub.u8 q15, q15, $diff + MEND + + MACRO + ST_16x8 $dst, $stride + vst1.8 {q8}, [$dst], $stride + vst1.8 {q9}, [$dst], $stride + vst1.8 {q10},[$dst], $stride + vst1.8 {q11},[$dst], $stride + vst1.8 {q12},[$dst], $stride + vst1.8 {q13},[$dst], $stride + vst1.8 {q14},[$dst], $stride + vst1.8 {q15},[$dst], $stride + MEND + +;void vp9_idct32x32_1_add_neon(int16_t *input, uint8_t *dest, +; int dest_stride) +; +; r0 int16_t input +; r1 uint8_t *dest +; r2 int dest_stride + +|vp9_idct32x32_1_add_neon| PROC + push {lr} + pld [r1] + add r3, r1, #16 ; r3 dest + 16 for second loop + ldrsh r0, [r0] + + ; generate cospi_16_64 = 11585 + mov r12, #0x2d00 + add r12, #0x41 + + ; out = dct_const_round_shift(input[0] * cospi_16_64) + mul r0, r0, r12 ; input[0] * cospi_16_64 + add r0, r0, #0x2000 ; +(1 << ((DCT_CONST_BITS) - 1)) + asr r0, r0, #14 ; >> DCT_CONST_BITS + + ; out = dct_const_round_shift(out * cospi_16_64) + mul r0, r0, r12 ; out * cospi_16_64 + mov r12, r1 ; save dest + add r0, r0, #0x2000 ; +(1 << ((DCT_CONST_BITS) - 1)) + asr r0, r0, #14 ; >> DCT_CONST_BITS + + ; a1 = ROUND_POWER_OF_TWO(out, 6) + add r0, r0, #32 ; + (1 <<((6) - 1)) + asrs r0, r0, #6 ; >> 6 + bge diff_positive_32_32 + +diff_negative_32_32 + neg r0, r0 + usat r0, #8, r0 + vdup.u8 q0, r0 + mov r0, #4 + +diff_negative_32_32_loop + sub r0, #1 + LD_16x8 r1, r2 + SUB_DIFF_16x8 q0 + ST_16x8 r12, r2 + + LD_16x8 r1, r2 + SUB_DIFF_16x8 q0 + ST_16x8 r12, r2 + cmp r0, #2 + moveq r1, r3 + moveq r12, r3 + cmp r0, #0 + bne diff_negative_32_32_loop + pop {pc} + +diff_positive_32_32 + usat r0, #8, r0 + vdup.u8 q0, r0 + mov r0, #4 + +diff_positive_32_32_loop + sub r0, #1 + LD_16x8 r1, r2 + ADD_DIFF_16x8 q0 + ST_16x8 r12, r2 + + LD_16x8 r1, r2 + ADD_DIFF_16x8 q0 + ST_16x8 r12, r2 + cmp r0, #2 + moveq r1, r3 + moveq r12, r3 + cmp r0, #0 + bne diff_positive_32_32_loop + pop {pc} + + ENDP ; |vp9_idct32x32_1_add_neon| + END |