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/*
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* Copyright © 2024 Rémi Denis-Courmont.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "libavutil/riscv/asm.S"
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const ff_h264_scan8
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.byte 014, 015, 024, 025, 016, 017, 026, 027
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.byte 034, 035, 044, 045, 036, 037, 046, 047
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endconst
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#if (__riscv_xlen == 64)
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.irp depth, 8
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func ff_h264_idct_add16_\depth\()_rvv, zve32x
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addi sp, sp, -80
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lla t0, ff_h264_scan8
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sd s0, (sp)
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li t1, 32 << (\depth > 8)
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mv s0, sp
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sd ra, 8(sp)
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sd s1, 16(sp)
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sd s2, 24(sp)
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sd s3, 32(sp)
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sd s4, 40(sp)
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sd s5, 48(sp)
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sd s6, 56(sp)
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sd s7, 64(sp)
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vsetivli zero, 16, e8, m1, ta, ma
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vle8.v v8, (t0)
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vlse16.v v16, (a2), t1
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vluxei8.v v12, (a4), v8
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.if \depth == 8
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vsetvli zero, zero, e16, m2, ta, ma
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.else
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vsetvli zero, zero, e32, m4, ta, ma
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.endif
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vmsne.vi v1, v16, 0
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vsetvli zero, zero, e8, m1, ta, ma
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vmseq.vi v2, v12, 1
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vmsne.vi v0, v12, 0
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vmand.mm v1, v1, v2
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vsetvli zero, zero, e16, m2, ta, ma
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vmv.x.s s2, v0
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vmv.x.s s3, v1
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li s1, 16
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mv s4, a0
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mv s5, a1
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mv s6, a2
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mv s7, a3
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1:
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andi t0, s2, 1
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addi s1, s1, -1
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srli s2, s2, 1
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beqz t0, 3f # if (nnz)
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lw t2, (s5) # block_offset[i]
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andi t1, s3, 1
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mv a1, s6
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mv a2, s7
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add a0, s4, t2
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beqz t1, 2f # if (nnz == 1 && block[i * 16])
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call ff_h264_idct_dc_add_\depth\()_c
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j 3f
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2:
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call ff_h264_idct_add_\depth\()_c
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3:
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srli s3, s3, 1
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addi s5, s5, 4
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addi s6, s6, 16 * 2 << (\depth > 8)
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bnez s1, 1b
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ld s7, 64(sp)
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ld s6, 56(sp)
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ld s5, 48(sp)
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ld s4, 40(sp)
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ld s3, 32(sp)
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ld s2, 24(sp)
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ld s1, 16(sp)
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ld ra, 8(sp)
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ld s0, 0(sp)
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addi sp, sp, 80
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ret
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endfunc
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func ff_h264_idct_add16intra_\depth\()_rvv, zve32x
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addi sp, sp, -80
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lla t0, ff_h264_scan8
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sd s0, (sp)
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li t1, 32 << (\depth > 8)
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mv s0, sp
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sd ra, 8(sp)
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sd s1, 16(sp)
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sd s2, 24(sp)
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sd s3, 32(sp)
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sd s4, 40(sp)
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sd s5, 48(sp)
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sd s6, 56(sp)
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sd s7, 64(sp)
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vsetivli zero, 16, e8, m1, ta, ma
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vle8.v v8, (t0)
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vlse16.v v16, (a2), t1
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vluxei8.v v12, (a4), v8
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.if \depth == 8
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vsetvli zero, zero, e16, m2, ta, ma
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.else
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vsetvli zero, zero, e32, m4, ta, ma
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.endif
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vmsne.vi v1, v16, 0
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vsetvli zero, zero, e8, m1, ta, ma
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vmsne.vi v0, v12, 0
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vsetvli zero, zero, e16, m2, ta, ma
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vmv.x.s s2, v0
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vmv.x.s s3, v1
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li s1, 16
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mv s4, a0
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mv s5, a1
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mv s6, a2
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mv s7, a3
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1:
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andi t0, s2, 1
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addi s1, s1, -1
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srli s2, s2, 1
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lw t2, (s5) # block_offset[i]
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andi t1, s3, 1
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mv a1, s6
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mv a2, s7
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add a0, s4, t2
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beqz t0, 2f # if (nnzc[scan8[i]])
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call ff_h264_idct_add_\depth\()_c
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j 3f
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2:
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beqz t1, 3f # if (block[i * 16])
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call ff_h264_idct_dc_add_\depth\()_c
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3:
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srli s3, s3, 1
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addi s5, s5, 4
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addi s6, s6, 16 * 2 << (\depth > 8)
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bnez s1, 1b
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ld s7, 64(sp)
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ld s6, 56(sp)
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ld s5, 48(sp)
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ld s4, 40(sp)
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ld s3, 32(sp)
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ld s2, 24(sp)
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ld s1, 16(sp)
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ld ra, 8(sp)
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ld s0, 0(sp)
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addi sp, sp, 80
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ret
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endfunc
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.endr
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#endif
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