55414bc573
Note that there are two Godot-specific changes made to libwebp
for the javascript/HTML5 platform. They are documented in the
README.md.
(cherry picked from commit ee3cf211c6)
110 lines
4.9 KiB
C
110 lines
4.9 KiB
C
// Copyright 2014 Google Inc. All Rights Reserved.
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//
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// Use of this source code is governed by a BSD-style license
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// that can be found in the COPYING file in the root of the source
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// tree. An additional intellectual property rights grant can be found
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// in the file PATENTS. All contributing project authors may
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// be found in the AUTHORS file in the root of the source tree.
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// -----------------------------------------------------------------------------
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//
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// ARGB making functions (mips version).
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//
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// Author: Djordje Pesut (djordje.pesut@imgtec.com)
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#include "./dsp.h"
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#if defined(WEBP_USE_MIPS_DSP_R2)
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static void PackARGB(const uint8_t* a, const uint8_t* r, const uint8_t* g,
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const uint8_t* b, int len, uint32_t* out) {
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int temp0, temp1, temp2, temp3, offset;
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const int rest = len & 1;
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const uint32_t* const loop_end = out + len - rest;
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const int step = 4;
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__asm__ volatile (
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"xor %[offset], %[offset], %[offset] \n\t"
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"beq %[loop_end], %[out], 0f \n\t"
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"2: \n\t"
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"lbux %[temp0], %[offset](%[a]) \n\t"
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"lbux %[temp1], %[offset](%[r]) \n\t"
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"lbux %[temp2], %[offset](%[g]) \n\t"
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"lbux %[temp3], %[offset](%[b]) \n\t"
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"ins %[temp1], %[temp0], 16, 16 \n\t"
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"ins %[temp3], %[temp2], 16, 16 \n\t"
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"addiu %[out], %[out], 4 \n\t"
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"precr.qb.ph %[temp0], %[temp1], %[temp3] \n\t"
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"sw %[temp0], -4(%[out]) \n\t"
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"addu %[offset], %[offset], %[step] \n\t"
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"bne %[loop_end], %[out], 2b \n\t"
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"0: \n\t"
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"beq %[rest], $zero, 1f \n\t"
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"lbux %[temp0], %[offset](%[a]) \n\t"
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"lbux %[temp1], %[offset](%[r]) \n\t"
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"lbux %[temp2], %[offset](%[g]) \n\t"
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"lbux %[temp3], %[offset](%[b]) \n\t"
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"ins %[temp1], %[temp0], 16, 16 \n\t"
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"ins %[temp3], %[temp2], 16, 16 \n\t"
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"precr.qb.ph %[temp0], %[temp1], %[temp3] \n\t"
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"sw %[temp0], 0(%[out]) \n\t"
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"1: \n\t"
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: [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2),
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[temp3]"=&r"(temp3), [offset]"=&r"(offset), [out]"+&r"(out)
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: [a]"r"(a), [r]"r"(r), [g]"r"(g), [b]"r"(b), [step]"r"(step),
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[loop_end]"r"(loop_end), [rest]"r"(rest)
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: "memory"
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);
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}
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static void PackRGB(const uint8_t* r, const uint8_t* g, const uint8_t* b,
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int len, int step, uint32_t* out) {
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int temp0, temp1, temp2, offset;
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const int rest = len & 1;
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const int a = 0xff;
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const uint32_t* const loop_end = out + len - rest;
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__asm__ volatile (
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"xor %[offset], %[offset], %[offset] \n\t"
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"beq %[loop_end], %[out], 0f \n\t"
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"2: \n\t"
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"lbux %[temp0], %[offset](%[r]) \n\t"
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"lbux %[temp1], %[offset](%[g]) \n\t"
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"lbux %[temp2], %[offset](%[b]) \n\t"
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"ins %[temp0], %[a], 16, 16 \n\t"
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"ins %[temp2], %[temp1], 16, 16 \n\t"
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"addiu %[out], %[out], 4 \n\t"
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"precr.qb.ph %[temp0], %[temp0], %[temp2] \n\t"
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"sw %[temp0], -4(%[out]) \n\t"
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"addu %[offset], %[offset], %[step] \n\t"
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"bne %[loop_end], %[out], 2b \n\t"
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"0: \n\t"
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"beq %[rest], $zero, 1f \n\t"
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"lbux %[temp0], %[offset](%[r]) \n\t"
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"lbux %[temp1], %[offset](%[g]) \n\t"
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"lbux %[temp2], %[offset](%[b]) \n\t"
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"ins %[temp0], %[a], 16, 16 \n\t"
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"ins %[temp2], %[temp1], 16, 16 \n\t"
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"precr.qb.ph %[temp0], %[temp0], %[temp2] \n\t"
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"sw %[temp0], 0(%[out]) \n\t"
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"1: \n\t"
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: [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2),
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[offset]"=&r"(offset), [out]"+&r"(out)
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: [a]"r"(a), [r]"r"(r), [g]"r"(g), [b]"r"(b), [step]"r"(step),
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[loop_end]"r"(loop_end), [rest]"r"(rest)
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: "memory"
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);
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}
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//------------------------------------------------------------------------------
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// Entry point
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extern void VP8EncDspARGBInitMIPSdspR2(void);
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WEBP_TSAN_IGNORE_FUNCTION void VP8EncDspARGBInitMIPSdspR2(void) {
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VP8PackARGB = PackARGB;
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VP8PackRGB = PackRGB;
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}
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#else // !WEBP_USE_MIPS_DSP_R2
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WEBP_DSP_INIT_STUB(VP8EncDspARGBInitMIPSdspR2)
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#endif // WEBP_USE_MIPS_DSP_R2
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