coffee/libyuv
1
0
Fork 0
mirror of https://chromium.googlesource.com/libyuv/libyuv synced 2025-12-07 17:26:49 +08:00
Code Issues Packages Projects Releases Wiki Activity

[AArch64] Improve ARGB{,1}555TOARGB using SRI instructions

Browse Source 
The existing transformations can be more cleanly expressed by using SRI
instructions to perform a shift and simultaneously merge in to an
existing value.

Reduction in runtime for selected kernels:

                Kernel | Cortex-A55 | Cortex-A76 | Cortex-X2
   ARGB1555ToYRow_NEON |     -26.2% |     -14.9% |    -28.2%
  ARGB1555ToUVRow_NEON |     -25.2% |     -18.4% |    -20.9%
ARGB1555ToARGBRow_NEON |     -43.6% |     -32.8% |    -19.7%

Bug: libyuv:976
Change-Id: Id07ac6f2cd3eb9bb70f9e29fc1f4b29fe26156ec
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/5383444
Reviewed-by: Justin Green <greenjustin@google.com>
Reviewed-by: Frank Barchard <fbarchard@chromium.org>
This commit is contained in:
George Steed 2024-03-13 15:06:45 +00:00 committed by Frank Barchard
parent 95b0a3326c
commit bfedc8bc11
1 changed files with 24 additions and 37 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

61
source/row_neon64.cc
View File

@ -1626,42 +1626,29 @@ void RGB565ToARGBRow_NEON(const uint8_t* src_rgb565,
);
}
#define ARGB1555TOARGB \
"ushr v2.8h, v0.8h, #10 \n" /* R xxxRRRRR */ \
"shl v2.8h, v2.8h, #3 \n" /* R RRRRR000 upper 5 */ \
"xtn v3.8b, v2.8h \n" /* RRRRR000 AAAAAAAA */ \
\
"sshr v2.8h, v0.8h, #15 \n" /* A AAAAAAAA */ \
"xtn2 v3.16b, v2.8h \n" \
\
"xtn v2.8b, v0.8h \n" /* B xxxBBBBB */ \
"shrn2 v2.16b,v0.8h, #5 \n" /* G xxxGGGGG */ \
\
"ushr v1.16b, v3.16b, #5 \n" /* R,A 00000RRR lower 3 */ \
"shl v0.16b, v2.16b, #3 \n" /* B,G BBBBB000 upper 5 */ \
"ushr v2.16b, v0.16b, #5 \n" /* B,G 00000BBB lower 3 */ \
\
"orr v0.16b, v0.16b, v2.16b \n" /* B,G */ \
"orr v2.16b, v1.16b, v3.16b \n" /* R,A */ \
"dup v1.2D, v0.D[1] \n" \
"dup v3.2D, v2.D[1] \n"
#define ARGB1555TOARGB \
/* Input: ARRRRRGGGGGBBBBB */ \
"xtn v29.8b, v0.8h \n" /* xxxBBBBB */ \
"shrn v3.8b, v0.8h, #8 \n" /* Axxxxxxx */ \
"shrn v2.8b, v0.8h, #7 \n" /* RRRRRxxx */ \
"shrn v1.8b, v0.8h, #2 \n" /* GGGGGxxx */ \
"shl v0.8b, v29.8b, #3 \n" /* BBBBB000 */ \
"sshr v3.8b, v3.8b, #7 \n" /* AAAAAAAA */ \
"sri v2.8b, v2.8b, #5 \n" /* RRRRRRRR */ \
"sri v1.8b, v1.8b, #5 \n" /* GGGGGGGG */ \
"sri v0.8b, v0.8b, #5 \n" /* BBBBBBBB */
// RGB555TOARGB is same as ARGB1555TOARGB but ignores alpha.
#define RGB555TOARGB \
"ushr v2.8h, v0.8h, #10 \n" /* R xxxRRRRR */ \
"shl v2.8h, v2.8h, #3 \n" /* R RRRRR000 upper 5 */ \
"xtn v3.8b, v2.8h \n" /* RRRRR000 */ \
\
"xtn v2.8b, v0.8h \n" /* B xxxBBBBB */ \
"shrn2 v2.16b,v0.8h, #5 \n" /* G xxxGGGGG */ \
\
"ushr v1.16b, v3.16b, #5 \n" /* R 00000RRR lower 3 */ \
"shl v0.16b, v2.16b, #3 \n" /* B,G BBBBB000 upper 5 */ \
"ushr v2.16b, v0.16b, #5 \n" /* B,G 00000BBB lower 3 */ \
\
"orr v0.16b, v0.16b, v2.16b \n" /* B,G */ \
"orr v2.16b, v1.16b, v3.16b \n" /* R */ \
"dup v1.2D, v0.D[1] \n" /* G */
#define RGB555TOARGB \
/* Input: xRRRRRGGGGGBBBBB */ \
"xtn v29.8b, v0.8h \n" /* xxxBBBBB */ \
"shrn v2.8b, v0.8h, #7 \n" /* RRRRRxxx */ \
"shrn v1.8b, v0.8h, #2 \n" /* GGGGGxxx */ \
"shl v0.8b, v29.8b, #3 \n" /* BBBBB000 */ \
\
"sri v2.8b, v2.8b, #5 \n" /* RRRRRRRR */ \
"sri v1.8b, v1.8b, #5 \n" /* GGGGGGGG */ \
"sri v0.8b, v0.8b, #5 \n" /* BBBBBBBB */
void ARGB1555ToARGBRow_NEON(const uint8_t* src_argb1555,
uint8_t* dst_argb,
@ -1679,7 +1666,7 @@ void ARGB1555ToARGBRow_NEON(const uint8_t* src_argb1555,
"+r"(dst_argb), // %1
"+r"(width) // %2
:
: "cc", "memory", "v0", "v1", "v2", "v3" // Clobber List
: "cc", "memory", "v0", "v1", "v2", "v3", "v29" // Clobber List
);
}
@ -2855,7 +2842,7 @@ void ARGB1555ToUVRow_NEON(const uint8_t* src_argb1555,
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v16", "v17",
"v18", "v19", "v20", "v21", "v22", "v23", "v24", "v25", "v26", "v27",
"v28");
"v28", "v29");
}
// 16x2 pixels -> 8x1. width is number of argb pixels. e.g. 16.
@ -2968,7 +2955,7 @@ void ARGB1555ToYRow_NEON(const uint8_t* src_argb1555,
"+r"(dst_y), // %1
"+r"(width) // %2
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7");
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v29");
}
void ARGB4444ToYRow_NEON(const uint8_t* src_argb4444,