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Diffstat (limited to 'drivers/webpold/dsp/dec_neon.c')
-rw-r--r--drivers/webpold/dsp/dec_neon.c329
1 files changed, 0 insertions, 329 deletions
diff --git a/drivers/webpold/dsp/dec_neon.c b/drivers/webpold/dsp/dec_neon.c
deleted file mode 100644
index ec824b790b..0000000000
--- a/drivers/webpold/dsp/dec_neon.c
+++ /dev/null
@@ -1,329 +0,0 @@
-// Copyright 2012 Google Inc. All Rights Reserved.
-//
-// This code is licensed under the same terms as WebM:
-// Software License Agreement: http://www.webmproject.org/license/software/
-// Additional IP Rights Grant: http://www.webmproject.org/license/additional/
-// -----------------------------------------------------------------------------
-//
-// ARM NEON version of dsp functions and loop filtering.
-//
-// Authors: Somnath Banerjee (somnath@google.com)
-// Johann Koenig (johannkoenig@google.com)
-
-#include "./dsp.h"
-
-#if defined(WEBP_USE_NEON)
-
-#include "../dec/vp8i.h"
-
-#if defined(__cplusplus) || defined(c_plusplus)
-extern "C" {
-#endif
-
-#define QRegs "q0", "q1", "q2", "q3", "q4", "q5", "q6", "q7", \
- "q8", "q9", "q10", "q11", "q12", "q13", "q14", "q15"
-
-#define FLIP_SIGN_BIT2(a, b, s) \
- "veor " #a "," #a "," #s " \n" \
- "veor " #b "," #b "," #s " \n" \
-
-#define FLIP_SIGN_BIT4(a, b, c, d, s) \
- FLIP_SIGN_BIT2(a, b, s) \
- FLIP_SIGN_BIT2(c, d, s) \
-
-#define NEEDS_FILTER(p1, p0, q0, q1, thresh, mask) \
- "vabd.u8 q15," #p0 "," #q0 " \n" /* abs(p0 - q0) */ \
- "vabd.u8 q14," #p1 "," #q1 " \n" /* abs(p1 - q1) */ \
- "vqadd.u8 q15, q15, q15 \n" /* abs(p0 - q0) * 2 */ \
- "vshr.u8 q14, q14, #1 \n" /* abs(p1 - q1) / 2 */ \
- "vqadd.u8 q15, q15, q14 \n" /* abs(p0 - q0) * 2 + abs(p1 - q1) / 2 */ \
- "vdup.8 q14, " #thresh " \n" \
- "vcge.u8 " #mask ", q14, q15 \n" /* mask <= thresh */
-
-#define GET_BASE_DELTA(p1, p0, q0, q1, o) \
- "vqsub.s8 q15," #q0 "," #p0 " \n" /* (q0 - p0) */ \
- "vqsub.s8 " #o "," #p1 "," #q1 " \n" /* (p1 - q1) */ \
- "vqadd.s8 " #o "," #o ", q15 \n" /* (p1 - q1) + 1 * (p0 - q0) */ \
- "vqadd.s8 " #o "," #o ", q15 \n" /* (p1 - q1) + 2 * (p0 - q0) */ \
- "vqadd.s8 " #o "," #o ", q15 \n" /* (p1 - q1) + 3 * (p0 - q0) */
-
-#define DO_SIMPLE_FILTER(p0, q0, fl) \
- "vmov.i8 q15, #0x03 \n" \
- "vqadd.s8 q15, q15, " #fl " \n" /* filter1 = filter + 3 */ \
- "vshr.s8 q15, q15, #3 \n" /* filter1 >> 3 */ \
- "vqadd.s8 " #p0 "," #p0 ", q15 \n" /* p0 += filter1 */ \
- \
- "vmov.i8 q15, #0x04 \n" \
- "vqadd.s8 q15, q15, " #fl " \n" /* filter1 = filter + 4 */ \
- "vshr.s8 q15, q15, #3 \n" /* filter2 >> 3 */ \
- "vqsub.s8 " #q0 "," #q0 ", q15 \n" /* q0 -= filter2 */
-
-// Applies filter on 2 pixels (p0 and q0)
-#define DO_FILTER2(p1, p0, q0, q1, thresh) \
- NEEDS_FILTER(p1, p0, q0, q1, thresh, q9) /* filter mask in q9 */ \
- "vmov.i8 q10, #0x80 \n" /* sign bit */ \
- FLIP_SIGN_BIT4(p1, p0, q0, q1, q10) /* convert to signed value */ \
- GET_BASE_DELTA(p1, p0, q0, q1, q11) /* get filter level */ \
- "vand q9, q9, q11 \n" /* apply filter mask */ \
- DO_SIMPLE_FILTER(p0, q0, q9) /* apply filter */ \
- FLIP_SIGN_BIT2(p0, q0, q10)
-
-// Load/Store vertical edge
-#define LOAD8x4(c1, c2, c3, c4, b1, b2, stride) \
- "vld4.8 {" #c1"[0], " #c2"[0], " #c3"[0], " #c4"[0]}," #b1 "," #stride"\n" \
- "vld4.8 {" #c1"[1], " #c2"[1], " #c3"[1], " #c4"[1]}," #b2 "," #stride"\n" \
- "vld4.8 {" #c1"[2], " #c2"[2], " #c3"[2], " #c4"[2]}," #b1 "," #stride"\n" \
- "vld4.8 {" #c1"[3], " #c2"[3], " #c3"[3], " #c4"[3]}," #b2 "," #stride"\n" \
- "vld4.8 {" #c1"[4], " #c2"[4], " #c3"[4], " #c4"[4]}," #b1 "," #stride"\n" \
- "vld4.8 {" #c1"[5], " #c2"[5], " #c3"[5], " #c4"[5]}," #b2 "," #stride"\n" \
- "vld4.8 {" #c1"[6], " #c2"[6], " #c3"[6], " #c4"[6]}," #b1 "," #stride"\n" \
- "vld4.8 {" #c1"[7], " #c2"[7], " #c3"[7], " #c4"[7]}," #b2 "," #stride"\n"
-
-#define STORE8x2(c1, c2, p,stride) \
- "vst2.8 {" #c1"[0], " #c2"[0]}," #p "," #stride " \n" \
- "vst2.8 {" #c1"[1], " #c2"[1]}," #p "," #stride " \n" \
- "vst2.8 {" #c1"[2], " #c2"[2]}," #p "," #stride " \n" \
- "vst2.8 {" #c1"[3], " #c2"[3]}," #p "," #stride " \n" \
- "vst2.8 {" #c1"[4], " #c2"[4]}," #p "," #stride " \n" \
- "vst2.8 {" #c1"[5], " #c2"[5]}," #p "," #stride " \n" \
- "vst2.8 {" #c1"[6], " #c2"[6]}," #p "," #stride " \n" \
- "vst2.8 {" #c1"[7], " #c2"[7]}," #p "," #stride " \n"
-
-//-----------------------------------------------------------------------------
-// Simple In-loop filtering (Paragraph 15.2)
-
-static void SimpleVFilter16NEON(uint8_t* p, int stride, int thresh) {
- __asm__ volatile (
- "sub %[p], %[p], %[stride], lsl #1 \n" // p -= 2 * stride
-
- "vld1.u8 {q1}, [%[p]], %[stride] \n" // p1
- "vld1.u8 {q2}, [%[p]], %[stride] \n" // p0
- "vld1.u8 {q3}, [%[p]], %[stride] \n" // q0
- "vld1.u8 {q4}, [%[p]] \n" // q1
-
- DO_FILTER2(q1, q2, q3, q4, %[thresh])
-
- "sub %[p], %[p], %[stride], lsl #1 \n" // p -= 2 * stride
-
- "vst1.u8 {q2}, [%[p]], %[stride] \n" // store op0
- "vst1.u8 {q3}, [%[p]] \n" // store oq0
- : [p] "+r"(p)
- : [stride] "r"(stride), [thresh] "r"(thresh)
- : "memory", QRegs
- );
-}
-
-static void SimpleHFilter16NEON(uint8_t* p, int stride, int thresh) {
- __asm__ volatile (
- "sub r4, %[p], #2 \n" // base1 = p - 2
- "lsl r6, %[stride], #1 \n" // r6 = 2 * stride
- "add r5, r4, %[stride] \n" // base2 = base1 + stride
-
- LOAD8x4(d2, d3, d4, d5, [r4], [r5], r6)
- LOAD8x4(d6, d7, d8, d9, [r4], [r5], r6)
- "vswp d3, d6 \n" // p1:q1 p0:q3
- "vswp d5, d8 \n" // q0:q2 q1:q4
- "vswp q2, q3 \n" // p1:q1 p0:q2 q0:q3 q1:q4
-
- DO_FILTER2(q1, q2, q3, q4, %[thresh])
-
- "sub %[p], %[p], #1 \n" // p - 1
-
- "vswp d5, d6 \n"
- STORE8x2(d4, d5, [%[p]], %[stride])
- STORE8x2(d6, d7, [%[p]], %[stride])
-
- : [p] "+r"(p)
- : [stride] "r"(stride), [thresh] "r"(thresh)
- : "memory", "r4", "r5", "r6", QRegs
- );
-}
-
-static void SimpleVFilter16iNEON(uint8_t* p, int stride, int thresh) {
- int k;
- for (k = 3; k > 0; --k) {
- p += 4 * stride;
- SimpleVFilter16NEON(p, stride, thresh);
- }
-}
-
-static void SimpleHFilter16iNEON(uint8_t* p, int stride, int thresh) {
- int k;
- for (k = 3; k > 0; --k) {
- p += 4;
- SimpleHFilter16NEON(p, stride, thresh);
- }
-}
-
-static void TransformOneNEON(const int16_t *in, uint8_t *dst) {
- const int kBPS = BPS;
- const int16_t constants[] = {20091, 17734, 0, 0};
- /* kC1, kC2. Padded because vld1.16 loads 8 bytes
- * Technically these are unsigned but vqdmulh is only available in signed.
- * vqdmulh returns high half (effectively >> 16) but also doubles the value,
- * changing the >> 16 to >> 15 and requiring an additional >> 1.
- * We use this to our advantage with kC2. The canonical value is 35468.
- * However, the high bit is set so treating it as signed will give incorrect
- * results. We avoid this by down shifting by 1 here to clear the highest bit.
- * Combined with the doubling effect of vqdmulh we get >> 16.
- * This can not be applied to kC1 because the lowest bit is set. Down shifting
- * the constant would reduce precision.
- */
-
- /* libwebp uses a trick to avoid some extra addition that libvpx does.
- * Instead of:
- * temp2 = ip[12] + ((ip[12] * cospi8sqrt2minus1) >> 16);
- * libwebp adds 1 << 16 to cospi8sqrt2minus1 (kC1). However, this causes the
- * same issue with kC1 and vqdmulh that we work around by down shifting kC2
- */
-
- /* Adapted from libvpx: vp8/common/arm/neon/shortidct4x4llm_neon.asm */
- __asm__ volatile (
- "vld1.16 {q1, q2}, [%[in]] \n"
- "vld1.16 {d0}, [%[constants]] \n"
-
- /* d2: in[0]
- * d3: in[8]
- * d4: in[4]
- * d5: in[12]
- */
- "vswp d3, d4 \n"
-
- /* q8 = {in[4], in[12]} * kC1 * 2 >> 16
- * q9 = {in[4], in[12]} * kC2 >> 16
- */
- "vqdmulh.s16 q8, q2, d0[0] \n"
- "vqdmulh.s16 q9, q2, d0[1] \n"
-
- /* d22 = a = in[0] + in[8]
- * d23 = b = in[0] - in[8]
- */
- "vqadd.s16 d22, d2, d3 \n"
- "vqsub.s16 d23, d2, d3 \n"
-
- /* The multiplication should be x * kC1 >> 16
- * However, with vqdmulh we get x * kC1 * 2 >> 16
- * (multiply, double, return high half)
- * We avoided this in kC2 by pre-shifting the constant.
- * q8 = in[4]/[12] * kC1 >> 16
- */
- "vshr.s16 q8, q8, #1 \n"
-
- /* Add {in[4], in[12]} back after the multiplication. This is handled by
- * adding 1 << 16 to kC1 in the libwebp C code.
- */
- "vqadd.s16 q8, q2, q8 \n"
-
- /* d20 = c = in[4]*kC2 - in[12]*kC1
- * d21 = d = in[4]*kC1 + in[12]*kC2
- */
- "vqsub.s16 d20, d18, d17 \n"
- "vqadd.s16 d21, d19, d16 \n"
-
- /* d2 = tmp[0] = a + d
- * d3 = tmp[1] = b + c
- * d4 = tmp[2] = b - c
- * d5 = tmp[3] = a - d
- */
- "vqadd.s16 d2, d22, d21 \n"
- "vqadd.s16 d3, d23, d20 \n"
- "vqsub.s16 d4, d23, d20 \n"
- "vqsub.s16 d5, d22, d21 \n"
-
- "vzip.16 q1, q2 \n"
- "vzip.16 q1, q2 \n"
-
- "vswp d3, d4 \n"
-
- /* q8 = {tmp[4], tmp[12]} * kC1 * 2 >> 16
- * q9 = {tmp[4], tmp[12]} * kC2 >> 16
- */
- "vqdmulh.s16 q8, q2, d0[0] \n"
- "vqdmulh.s16 q9, q2, d0[1] \n"
-
- /* d22 = a = tmp[0] + tmp[8]
- * d23 = b = tmp[0] - tmp[8]
- */
- "vqadd.s16 d22, d2, d3 \n"
- "vqsub.s16 d23, d2, d3 \n"
-
- /* See long winded explanations prior */
- "vshr.s16 q8, q8, #1 \n"
- "vqadd.s16 q8, q2, q8 \n"
-
- /* d20 = c = in[4]*kC2 - in[12]*kC1
- * d21 = d = in[4]*kC1 + in[12]*kC2
- */
- "vqsub.s16 d20, d18, d17 \n"
- "vqadd.s16 d21, d19, d16 \n"
-
- /* d2 = tmp[0] = a + d
- * d3 = tmp[1] = b + c
- * d4 = tmp[2] = b - c
- * d5 = tmp[3] = a - d
- */
- "vqadd.s16 d2, d22, d21 \n"
- "vqadd.s16 d3, d23, d20 \n"
- "vqsub.s16 d4, d23, d20 \n"
- "vqsub.s16 d5, d22, d21 \n"
-
- "vld1.32 d6[0], [%[dst]], %[kBPS] \n"
- "vld1.32 d6[1], [%[dst]], %[kBPS] \n"
- "vld1.32 d7[0], [%[dst]], %[kBPS] \n"
- "vld1.32 d7[1], [%[dst]], %[kBPS] \n"
-
- "sub %[dst], %[dst], %[kBPS], lsl #2 \n"
-
- /* (val) + 4 >> 3 */
- "vrshr.s16 d2, d2, #3 \n"
- "vrshr.s16 d3, d3, #3 \n"
- "vrshr.s16 d4, d4, #3 \n"
- "vrshr.s16 d5, d5, #3 \n"
-
- "vzip.16 q1, q2 \n"
- "vzip.16 q1, q2 \n"
-
- /* Must accumulate before saturating */
- "vmovl.u8 q8, d6 \n"
- "vmovl.u8 q9, d7 \n"
-
- "vqadd.s16 q1, q1, q8 \n"
- "vqadd.s16 q2, q2, q9 \n"
-
- "vqmovun.s16 d0, q1 \n"
- "vqmovun.s16 d1, q2 \n"
-
- "vst1.32 d0[0], [%[dst]], %[kBPS] \n"
- "vst1.32 d0[1], [%[dst]], %[kBPS] \n"
- "vst1.32 d1[0], [%[dst]], %[kBPS] \n"
- "vst1.32 d1[1], [%[dst]] \n"
-
- : [in] "+r"(in), [dst] "+r"(dst) /* modified registers */
- : [kBPS] "r"(kBPS), [constants] "r"(constants) /* constants */
- : "memory", "q0", "q1", "q2", "q8", "q9", "q10", "q11" /* clobbered */
- );
-}
-
-static void TransformTwoNEON(const int16_t* in, uint8_t* dst, int do_two) {
- TransformOneNEON(in, dst);
- if (do_two) {
- TransformOneNEON(in + 16, dst + 4);
- }
-}
-
-extern void VP8DspInitNEON(void);
-
-void VP8DspInitNEON(void) {
- VP8Transform = TransformTwoNEON;
-
- VP8SimpleVFilter16 = SimpleVFilter16NEON;
- VP8SimpleHFilter16 = SimpleHFilter16NEON;
- VP8SimpleVFilter16i = SimpleVFilter16iNEON;
- VP8SimpleHFilter16i = SimpleHFilter16iNEON;
-}
-
-#if defined(__cplusplus) || defined(c_plusplus)
-} // extern "C"
-#endif
-
-#endif // WEBP_USE_NEON
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-04 19:35:59 +0000