mirror of
https://github.com/nillerusr/source-engine.git
synced 2026-08-07 17:29:36 +00:00
update thirdparty, add build script
This commit is contained in:
nillerusr
@@ -0,0 +1,174 @@
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intel/filter_sse2_intrinsics.lo: intel/filter_sse2_intrinsics.c \
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/usr/include/stdc-predef.h intel/../pngpriv.h /usr/include/stdlib.h \
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/usr/include/bits/libc-header-start.h /usr/include/features.h \
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/usr/include/sys/cdefs.h /usr/include/bits/wordsize.h \
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/usr/include/bits/long-double.h /usr/include/gnu/stubs.h \
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/usr/include/gnu/stubs-32.h \
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/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.4/include/stddef.h \
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/usr/include/bits/floatn.h /usr/include/bits/floatn-common.h \
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/usr/include/bits/stdlib-float.h /usr/include/string.h config.h \
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intel/../pnglibconf.h intel/../png.h intel/../pngconf.h \
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/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.4/include-fixed/limits.h \
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/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.4/include-fixed/syslimits.h \
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/usr/include/limits.h /usr/include/bits/posix1_lim.h \
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/usr/include/bits/local_lim.h /usr/include/linux/limits.h \
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/usr/include/stdio.h \
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/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.4/include/stdarg.h \
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/usr/include/bits/types.h /usr/include/bits/timesize.h \
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/usr/include/bits/typesizes.h /usr/include/bits/time64.h \
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/usr/include/bits/types/__fpos_t.h /usr/include/bits/types/__mbstate_t.h \
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/usr/include/bits/types/__fpos64_t.h /usr/include/bits/types/__FILE.h \
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/usr/include/bits/types/FILE.h /usr/include/bits/types/struct_FILE.h \
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/usr/include/bits/stdio_lim.h /usr/include/setjmp.h \
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/usr/include/bits/setjmp.h /usr/include/bits/types/__sigset_t.h \
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/usr/include/time.h /usr/include/bits/time.h \
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/usr/include/bits/types/clock_t.h /usr/include/bits/types/time_t.h \
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/usr/include/bits/types/struct_tm.h \
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/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.4/include/float.h \
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/usr/include/math.h /usr/include/bits/math-vector.h \
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/usr/include/bits/libm-simd-decl-stubs.h \
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/usr/include/bits/flt-eval-method.h /usr/include/bits/fp-logb.h \
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/usr/include/bits/fp-fast.h \
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/usr/include/bits/mathcalls-helper-functions.h \
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/usr/include/bits/mathcalls.h intel/../pngstruct.h /usr/include/zlib.h \
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/usr/include/zconf.h /usr/include/sys/types.h \
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/usr/include/bits/types/clockid_t.h /usr/include/bits/types/timer_t.h \
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/usr/include/bits/stdint-intn.h /usr/include/unistd.h \
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/usr/include/bits/posix_opt.h /usr/include/bits/confname.h \
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/usr/include/bits/unistd_ext.h intel/../pnginfo.h intel/../pngdebug.h
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/usr/include/stdc-predef.h:
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intel/../pngpriv.h:
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/usr/include/stdlib.h:
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/usr/include/bits/libc-header-start.h:
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/usr/include/features.h:
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/usr/include/sys/cdefs.h:
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/usr/include/bits/wordsize.h:
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/usr/include/bits/long-double.h:
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/usr/include/gnu/stubs.h:
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/usr/include/gnu/stubs-32.h:
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/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.4/include/stddef.h:
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/usr/include/bits/floatn.h:
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/usr/include/bits/floatn-common.h:
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/usr/include/bits/stdlib-float.h:
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/usr/include/string.h:
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config.h:
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intel/../pnglibconf.h:
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intel/../png.h:
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intel/../pngconf.h:
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/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.4/include-fixed/limits.h:
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/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.4/include-fixed/syslimits.h:
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/usr/include/limits.h:
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/usr/include/bits/posix1_lim.h:
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/usr/include/bits/local_lim.h:
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/usr/include/linux/limits.h:
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/usr/include/stdio.h:
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/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.4/include/stdarg.h:
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/usr/include/bits/types.h:
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/usr/include/bits/timesize.h:
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/usr/include/bits/typesizes.h:
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/usr/include/bits/time64.h:
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/usr/include/bits/types/__fpos_t.h:
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/usr/include/bits/types/__mbstate_t.h:
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/usr/include/bits/types/__fpos64_t.h:
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/usr/include/bits/types/__FILE.h:
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/usr/include/bits/types/FILE.h:
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/usr/include/bits/types/struct_FILE.h:
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/usr/include/bits/stdio_lim.h:
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/usr/include/setjmp.h:
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/usr/include/bits/setjmp.h:
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/usr/include/bits/types/__sigset_t.h:
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/usr/include/time.h:
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/usr/include/bits/time.h:
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/usr/include/bits/types/clock_t.h:
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/usr/include/bits/types/time_t.h:
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/usr/include/bits/types/struct_tm.h:
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/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.4/include/float.h:
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/usr/include/math.h:
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/usr/include/bits/math-vector.h:
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/usr/include/bits/libm-simd-decl-stubs.h:
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/usr/include/bits/flt-eval-method.h:
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/usr/include/bits/fp-logb.h:
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/usr/include/bits/fp-fast.h:
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/usr/include/bits/mathcalls-helper-functions.h:
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/usr/include/bits/mathcalls.h:
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intel/../pngstruct.h:
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/usr/include/zlib.h:
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/usr/include/zconf.h:
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/usr/include/sys/types.h:
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/usr/include/bits/types/clockid_t.h:
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/usr/include/bits/types/timer_t.h:
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/usr/include/bits/stdint-intn.h:
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/usr/include/unistd.h:
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/usr/include/bits/posix_opt.h:
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/usr/include/bits/confname.h:
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/usr/include/bits/unistd_ext.h:
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intel/../pnginfo.h:
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intel/../pngdebug.h:
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+174
@@ -0,0 +1,174 @@
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intel/intel_init.lo: intel/intel_init.c /usr/include/stdc-predef.h \
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intel/../pngpriv.h /usr/include/stdlib.h \
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/usr/include/bits/libc-header-start.h /usr/include/features.h \
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/usr/include/sys/cdefs.h /usr/include/bits/wordsize.h \
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/usr/include/bits/long-double.h /usr/include/gnu/stubs.h \
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/usr/include/gnu/stubs-32.h \
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/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.4/include/stddef.h \
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/usr/include/bits/floatn.h /usr/include/bits/floatn-common.h \
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/usr/include/bits/stdlib-float.h /usr/include/string.h config.h \
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intel/../pnglibconf.h intel/../png.h intel/../pngconf.h \
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/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.4/include-fixed/limits.h \
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/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.4/include-fixed/syslimits.h \
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/usr/include/limits.h /usr/include/bits/posix1_lim.h \
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/usr/include/bits/local_lim.h /usr/include/linux/limits.h \
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/usr/include/stdio.h \
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/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.4/include/stdarg.h \
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/usr/include/bits/types.h /usr/include/bits/timesize.h \
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/usr/include/bits/typesizes.h /usr/include/bits/time64.h \
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/usr/include/bits/types/__fpos_t.h /usr/include/bits/types/__mbstate_t.h \
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/usr/include/bits/types/__fpos64_t.h /usr/include/bits/types/__FILE.h \
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/usr/include/bits/types/FILE.h /usr/include/bits/types/struct_FILE.h \
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/usr/include/bits/stdio_lim.h /usr/include/setjmp.h \
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/usr/include/bits/setjmp.h /usr/include/bits/types/__sigset_t.h \
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/usr/include/time.h /usr/include/bits/time.h \
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/usr/include/bits/types/clock_t.h /usr/include/bits/types/time_t.h \
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/usr/include/bits/types/struct_tm.h \
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/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.4/include/float.h \
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/usr/include/math.h /usr/include/bits/math-vector.h \
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/usr/include/bits/libm-simd-decl-stubs.h \
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/usr/include/bits/flt-eval-method.h /usr/include/bits/fp-logb.h \
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/usr/include/bits/fp-fast.h \
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/usr/include/bits/mathcalls-helper-functions.h \
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/usr/include/bits/mathcalls.h intel/../pngstruct.h /usr/include/zlib.h \
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/usr/include/zconf.h /usr/include/sys/types.h \
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/usr/include/bits/types/clockid_t.h /usr/include/bits/types/timer_t.h \
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/usr/include/bits/stdint-intn.h /usr/include/unistd.h \
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/usr/include/bits/posix_opt.h /usr/include/bits/confname.h \
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/usr/include/bits/unistd_ext.h intel/../pnginfo.h intel/../pngdebug.h
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/usr/include/stdc-predef.h:
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intel/../pngpriv.h:
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/usr/include/stdlib.h:
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/usr/include/bits/libc-header-start.h:
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/usr/include/features.h:
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/usr/include/sys/cdefs.h:
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|
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/usr/include/bits/wordsize.h:
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|
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/usr/include/bits/long-double.h:
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/usr/include/gnu/stubs.h:
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|
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/usr/include/gnu/stubs-32.h:
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|
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/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.4/include/stddef.h:
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/usr/include/bits/floatn.h:
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/usr/include/bits/floatn-common.h:
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/usr/include/bits/stdlib-float.h:
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/usr/include/string.h:
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config.h:
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intel/../pnglibconf.h:
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intel/../png.h:
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|
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intel/../pngconf.h:
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|
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/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.4/include-fixed/limits.h:
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/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.4/include-fixed/syslimits.h:
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|
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/usr/include/limits.h:
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/usr/include/bits/posix1_lim.h:
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/usr/include/bits/local_lim.h:
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/usr/include/linux/limits.h:
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/usr/include/stdio.h:
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/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.4/include/stdarg.h:
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/usr/include/bits/types.h:
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/usr/include/bits/timesize.h:
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|
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/usr/include/bits/typesizes.h:
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/usr/include/bits/time64.h:
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|
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/usr/include/bits/types/__fpos_t.h:
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/usr/include/bits/types/__mbstate_t.h:
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/usr/include/bits/types/__fpos64_t.h:
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|
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/usr/include/bits/types/__FILE.h:
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/usr/include/bits/types/FILE.h:
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/usr/include/bits/types/struct_FILE.h:
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|
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/usr/include/bits/stdio_lim.h:
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/usr/include/setjmp.h:
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/usr/include/bits/setjmp.h:
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|
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/usr/include/bits/types/__sigset_t.h:
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|
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/usr/include/time.h:
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/usr/include/bits/time.h:
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/usr/include/bits/types/clock_t.h:
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/usr/include/bits/types/time_t.h:
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/usr/include/bits/types/struct_tm.h:
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|
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/usr/lib/gcc/x86_64-pc-linux-gnu/4.9.4/include/float.h:
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|
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/usr/include/math.h:
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|
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/usr/include/bits/math-vector.h:
|
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|
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/usr/include/bits/libm-simd-decl-stubs.h:
|
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|
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/usr/include/bits/flt-eval-method.h:
|
||||
|
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/usr/include/bits/fp-logb.h:
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||||
|
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/usr/include/bits/fp-fast.h:
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|
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/usr/include/bits/mathcalls-helper-functions.h:
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|
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/usr/include/bits/mathcalls.h:
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|
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intel/../pngstruct.h:
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|
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/usr/include/zlib.h:
|
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|
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/usr/include/zconf.h:
|
||||
|
||||
/usr/include/sys/types.h:
|
||||
|
||||
/usr/include/bits/types/clockid_t.h:
|
||||
|
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/usr/include/bits/types/timer_t.h:
|
||||
|
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/usr/include/bits/stdint-intn.h:
|
||||
|
||||
/usr/include/unistd.h:
|
||||
|
||||
/usr/include/bits/posix_opt.h:
|
||||
|
||||
/usr/include/bits/confname.h:
|
||||
|
||||
/usr/include/bits/unistd_ext.h:
|
||||
|
||||
intel/../pnginfo.h:
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||||
|
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intel/../pngdebug.h:
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||||
+391
@@ -0,0 +1,391 @@
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||||
/* filter_sse2_intrinsics.c - SSE2 optimized filter functions
|
||||
*
|
||||
* Copyright (c) 2018 Cosmin Truta
|
||||
* Copyright (c) 2016-2017 Glenn Randers-Pehrson
|
||||
* Written by Mike Klein and Matt Sarett
|
||||
* Derived from arm/filter_neon_intrinsics.c
|
||||
*
|
||||
* This code is released under the libpng license.
|
||||
* For conditions of distribution and use, see the disclaimer
|
||||
* and license in png.h
|
||||
*/
|
||||
|
||||
#include "../pngpriv.h"
|
||||
|
||||
#ifdef PNG_READ_SUPPORTED
|
||||
|
||||
#if PNG_INTEL_SSE_IMPLEMENTATION > 0
|
||||
|
||||
#include <immintrin.h>
|
||||
|
||||
/* Functions in this file look at most 3 pixels (a,b,c) to predict the 4th (d).
|
||||
* They're positioned like this:
|
||||
* prev: c b
|
||||
* row: a d
|
||||
* The Sub filter predicts d=a, Avg d=(a+b)/2, and Paeth predicts d to be
|
||||
* whichever of a, b, or c is closest to p=a+b-c.
|
||||
*/
|
||||
|
||||
static __m128i load4(const void* p) {
|
||||
int tmp;
|
||||
memcpy(&tmp, p, sizeof(tmp));
|
||||
return _mm_cvtsi32_si128(tmp);
|
||||
}
|
||||
|
||||
static void store4(void* p, __m128i v) {
|
||||
int tmp = _mm_cvtsi128_si32(v);
|
||||
memcpy(p, &tmp, sizeof(int));
|
||||
}
|
||||
|
||||
static __m128i load3(const void* p) {
|
||||
png_uint_32 tmp = 0;
|
||||
memcpy(&tmp, p, 3);
|
||||
return _mm_cvtsi32_si128(tmp);
|
||||
}
|
||||
|
||||
static void store3(void* p, __m128i v) {
|
||||
int tmp = _mm_cvtsi128_si32(v);
|
||||
memcpy(p, &tmp, 3);
|
||||
}
|
||||
|
||||
void png_read_filter_row_sub3_sse2(png_row_infop row_info, png_bytep row,
|
||||
png_const_bytep prev)
|
||||
{
|
||||
/* The Sub filter predicts each pixel as the previous pixel, a.
|
||||
* There is no pixel to the left of the first pixel. It's encoded directly.
|
||||
* That works with our main loop if we just say that left pixel was zero.
|
||||
*/
|
||||
size_t rb;
|
||||
|
||||
__m128i a, d = _mm_setzero_si128();
|
||||
|
||||
png_debug(1, "in png_read_filter_row_sub3_sse2");
|
||||
|
||||
rb = row_info->rowbytes;
|
||||
while (rb >= 4) {
|
||||
a = d; d = load4(row);
|
||||
d = _mm_add_epi8(d, a);
|
||||
store3(row, d);
|
||||
|
||||
row += 3;
|
||||
rb -= 3;
|
||||
}
|
||||
if (rb > 0) {
|
||||
a = d; d = load3(row);
|
||||
d = _mm_add_epi8(d, a);
|
||||
store3(row, d);
|
||||
|
||||
row += 3;
|
||||
rb -= 3;
|
||||
}
|
||||
PNG_UNUSED(prev)
|
||||
}
|
||||
|
||||
void png_read_filter_row_sub4_sse2(png_row_infop row_info, png_bytep row,
|
||||
png_const_bytep prev)
|
||||
{
|
||||
/* The Sub filter predicts each pixel as the previous pixel, a.
|
||||
* There is no pixel to the left of the first pixel. It's encoded directly.
|
||||
* That works with our main loop if we just say that left pixel was zero.
|
||||
*/
|
||||
size_t rb;
|
||||
|
||||
__m128i a, d = _mm_setzero_si128();
|
||||
|
||||
png_debug(1, "in png_read_filter_row_sub4_sse2");
|
||||
|
||||
rb = row_info->rowbytes+4;
|
||||
while (rb > 4) {
|
||||
a = d; d = load4(row);
|
||||
d = _mm_add_epi8(d, a);
|
||||
store4(row, d);
|
||||
|
||||
row += 4;
|
||||
rb -= 4;
|
||||
}
|
||||
PNG_UNUSED(prev)
|
||||
}
|
||||
|
||||
void png_read_filter_row_avg3_sse2(png_row_infop row_info, png_bytep row,
|
||||
png_const_bytep prev)
|
||||
{
|
||||
/* The Avg filter predicts each pixel as the (truncated) average of a and b.
|
||||
* There's no pixel to the left of the first pixel. Luckily, it's
|
||||
* predicted to be half of the pixel above it. So again, this works
|
||||
* perfectly with our loop if we make sure a starts at zero.
|
||||
*/
|
||||
|
||||
size_t rb;
|
||||
|
||||
const __m128i zero = _mm_setzero_si128();
|
||||
|
||||
__m128i b;
|
||||
__m128i a, d = zero;
|
||||
|
||||
png_debug(1, "in png_read_filter_row_avg3_sse2");
|
||||
rb = row_info->rowbytes;
|
||||
while (rb >= 4) {
|
||||
__m128i avg;
|
||||
b = load4(prev);
|
||||
a = d; d = load4(row );
|
||||
|
||||
/* PNG requires a truncating average, so we can't just use _mm_avg_epu8 */
|
||||
avg = _mm_avg_epu8(a,b);
|
||||
/* ...but we can fix it up by subtracting off 1 if it rounded up. */
|
||||
avg = _mm_sub_epi8(avg, _mm_and_si128(_mm_xor_si128(a,b),
|
||||
_mm_set1_epi8(1)));
|
||||
d = _mm_add_epi8(d, avg);
|
||||
store3(row, d);
|
||||
|
||||
prev += 3;
|
||||
row += 3;
|
||||
rb -= 3;
|
||||
}
|
||||
if (rb > 0) {
|
||||
__m128i avg;
|
||||
b = load3(prev);
|
||||
a = d; d = load3(row );
|
||||
|
||||
/* PNG requires a truncating average, so we can't just use _mm_avg_epu8 */
|
||||
avg = _mm_avg_epu8(a,b);
|
||||
/* ...but we can fix it up by subtracting off 1 if it rounded up. */
|
||||
avg = _mm_sub_epi8(avg, _mm_and_si128(_mm_xor_si128(a,b),
|
||||
_mm_set1_epi8(1)));
|
||||
|
||||
d = _mm_add_epi8(d, avg);
|
||||
store3(row, d);
|
||||
|
||||
prev += 3;
|
||||
row += 3;
|
||||
rb -= 3;
|
||||
}
|
||||
}
|
||||
|
||||
void png_read_filter_row_avg4_sse2(png_row_infop row_info, png_bytep row,
|
||||
png_const_bytep prev)
|
||||
{
|
||||
/* The Avg filter predicts each pixel as the (truncated) average of a and b.
|
||||
* There's no pixel to the left of the first pixel. Luckily, it's
|
||||
* predicted to be half of the pixel above it. So again, this works
|
||||
* perfectly with our loop if we make sure a starts at zero.
|
||||
*/
|
||||
size_t rb;
|
||||
const __m128i zero = _mm_setzero_si128();
|
||||
__m128i b;
|
||||
__m128i a, d = zero;
|
||||
|
||||
png_debug(1, "in png_read_filter_row_avg4_sse2");
|
||||
|
||||
rb = row_info->rowbytes+4;
|
||||
while (rb > 4) {
|
||||
__m128i avg;
|
||||
b = load4(prev);
|
||||
a = d; d = load4(row );
|
||||
|
||||
/* PNG requires a truncating average, so we can't just use _mm_avg_epu8 */
|
||||
avg = _mm_avg_epu8(a,b);
|
||||
/* ...but we can fix it up by subtracting off 1 if it rounded up. */
|
||||
avg = _mm_sub_epi8(avg, _mm_and_si128(_mm_xor_si128(a,b),
|
||||
_mm_set1_epi8(1)));
|
||||
|
||||
d = _mm_add_epi8(d, avg);
|
||||
store4(row, d);
|
||||
|
||||
prev += 4;
|
||||
row += 4;
|
||||
rb -= 4;
|
||||
}
|
||||
}
|
||||
|
||||
/* Returns |x| for 16-bit lanes. */
|
||||
static __m128i abs_i16(__m128i x) {
|
||||
#if PNG_INTEL_SSE_IMPLEMENTATION >= 2
|
||||
return _mm_abs_epi16(x);
|
||||
#else
|
||||
/* Read this all as, return x<0 ? -x : x.
|
||||
* To negate two's complement, you flip all the bits then add 1.
|
||||
*/
|
||||
__m128i is_negative = _mm_cmplt_epi16(x, _mm_setzero_si128());
|
||||
|
||||
/* Flip negative lanes. */
|
||||
x = _mm_xor_si128(x, is_negative);
|
||||
|
||||
/* +1 to negative lanes, else +0. */
|
||||
x = _mm_sub_epi16(x, is_negative);
|
||||
return x;
|
||||
#endif
|
||||
}
|
||||
|
||||
/* Bytewise c ? t : e. */
|
||||
static __m128i if_then_else(__m128i c, __m128i t, __m128i e) {
|
||||
#if PNG_INTEL_SSE_IMPLEMENTATION >= 3
|
||||
return _mm_blendv_epi8(e,t,c);
|
||||
#else
|
||||
return _mm_or_si128(_mm_and_si128(c, t), _mm_andnot_si128(c, e));
|
||||
#endif
|
||||
}
|
||||
|
||||
void png_read_filter_row_paeth3_sse2(png_row_infop row_info, png_bytep row,
|
||||
png_const_bytep prev)
|
||||
{
|
||||
/* Paeth tries to predict pixel d using the pixel to the left of it, a,
|
||||
* and two pixels from the previous row, b and c:
|
||||
* prev: c b
|
||||
* row: a d
|
||||
* The Paeth function predicts d to be whichever of a, b, or c is nearest to
|
||||
* p=a+b-c.
|
||||
*
|
||||
* The first pixel has no left context, and so uses an Up filter, p = b.
|
||||
* This works naturally with our main loop's p = a+b-c if we force a and c
|
||||
* to zero.
|
||||
* Here we zero b and d, which become c and a respectively at the start of
|
||||
* the loop.
|
||||
*/
|
||||
size_t rb;
|
||||
const __m128i zero = _mm_setzero_si128();
|
||||
__m128i c, b = zero,
|
||||
a, d = zero;
|
||||
|
||||
png_debug(1, "in png_read_filter_row_paeth3_sse2");
|
||||
|
||||
rb = row_info->rowbytes;
|
||||
while (rb >= 4) {
|
||||
/* It's easiest to do this math (particularly, deal with pc) with 16-bit
|
||||
* intermediates.
|
||||
*/
|
||||
__m128i pa,pb,pc,smallest,nearest;
|
||||
c = b; b = _mm_unpacklo_epi8(load4(prev), zero);
|
||||
a = d; d = _mm_unpacklo_epi8(load4(row ), zero);
|
||||
|
||||
/* (p-a) == (a+b-c - a) == (b-c) */
|
||||
|
||||
pa = _mm_sub_epi16(b,c);
|
||||
|
||||
/* (p-b) == (a+b-c - b) == (a-c) */
|
||||
pb = _mm_sub_epi16(a,c);
|
||||
|
||||
/* (p-c) == (a+b-c - c) == (a+b-c-c) == (b-c)+(a-c) */
|
||||
pc = _mm_add_epi16(pa,pb);
|
||||
|
||||
pa = abs_i16(pa); /* |p-a| */
|
||||
pb = abs_i16(pb); /* |p-b| */
|
||||
pc = abs_i16(pc); /* |p-c| */
|
||||
|
||||
smallest = _mm_min_epi16(pc, _mm_min_epi16(pa, pb));
|
||||
|
||||
/* Paeth breaks ties favoring a over b over c. */
|
||||
nearest = if_then_else(_mm_cmpeq_epi16(smallest, pa), a,
|
||||
if_then_else(_mm_cmpeq_epi16(smallest, pb), b,
|
||||
c));
|
||||
|
||||
/* Note `_epi8`: we need addition to wrap modulo 255. */
|
||||
d = _mm_add_epi8(d, nearest);
|
||||
store3(row, _mm_packus_epi16(d,d));
|
||||
|
||||
prev += 3;
|
||||
row += 3;
|
||||
rb -= 3;
|
||||
}
|
||||
if (rb > 0) {
|
||||
/* It's easiest to do this math (particularly, deal with pc) with 16-bit
|
||||
* intermediates.
|
||||
*/
|
||||
__m128i pa,pb,pc,smallest,nearest;
|
||||
c = b; b = _mm_unpacklo_epi8(load3(prev), zero);
|
||||
a = d; d = _mm_unpacklo_epi8(load3(row ), zero);
|
||||
|
||||
/* (p-a) == (a+b-c - a) == (b-c) */
|
||||
pa = _mm_sub_epi16(b,c);
|
||||
|
||||
/* (p-b) == (a+b-c - b) == (a-c) */
|
||||
pb = _mm_sub_epi16(a,c);
|
||||
|
||||
/* (p-c) == (a+b-c - c) == (a+b-c-c) == (b-c)+(a-c) */
|
||||
pc = _mm_add_epi16(pa,pb);
|
||||
|
||||
pa = abs_i16(pa); /* |p-a| */
|
||||
pb = abs_i16(pb); /* |p-b| */
|
||||
pc = abs_i16(pc); /* |p-c| */
|
||||
|
||||
smallest = _mm_min_epi16(pc, _mm_min_epi16(pa, pb));
|
||||
|
||||
/* Paeth breaks ties favoring a over b over c. */
|
||||
nearest = if_then_else(_mm_cmpeq_epi16(smallest, pa), a,
|
||||
if_then_else(_mm_cmpeq_epi16(smallest, pb), b,
|
||||
c));
|
||||
|
||||
/* Note `_epi8`: we need addition to wrap modulo 255. */
|
||||
d = _mm_add_epi8(d, nearest);
|
||||
store3(row, _mm_packus_epi16(d,d));
|
||||
|
||||
prev += 3;
|
||||
row += 3;
|
||||
rb -= 3;
|
||||
}
|
||||
}
|
||||
|
||||
void png_read_filter_row_paeth4_sse2(png_row_infop row_info, png_bytep row,
|
||||
png_const_bytep prev)
|
||||
{
|
||||
/* Paeth tries to predict pixel d using the pixel to the left of it, a,
|
||||
* and two pixels from the previous row, b and c:
|
||||
* prev: c b
|
||||
* row: a d
|
||||
* The Paeth function predicts d to be whichever of a, b, or c is nearest to
|
||||
* p=a+b-c.
|
||||
*
|
||||
* The first pixel has no left context, and so uses an Up filter, p = b.
|
||||
* This works naturally with our main loop's p = a+b-c if we force a and c
|
||||
* to zero.
|
||||
* Here we zero b and d, which become c and a respectively at the start of
|
||||
* the loop.
|
||||
*/
|
||||
size_t rb;
|
||||
const __m128i zero = _mm_setzero_si128();
|
||||
__m128i pa,pb,pc,smallest,nearest;
|
||||
__m128i c, b = zero,
|
||||
a, d = zero;
|
||||
|
||||
png_debug(1, "in png_read_filter_row_paeth4_sse2");
|
||||
|
||||
rb = row_info->rowbytes+4;
|
||||
while (rb > 4) {
|
||||
/* It's easiest to do this math (particularly, deal with pc) with 16-bit
|
||||
* intermediates.
|
||||
*/
|
||||
c = b; b = _mm_unpacklo_epi8(load4(prev), zero);
|
||||
a = d; d = _mm_unpacklo_epi8(load4(row ), zero);
|
||||
|
||||
/* (p-a) == (a+b-c - a) == (b-c) */
|
||||
pa = _mm_sub_epi16(b,c);
|
||||
|
||||
/* (p-b) == (a+b-c - b) == (a-c) */
|
||||
pb = _mm_sub_epi16(a,c);
|
||||
|
||||
/* (p-c) == (a+b-c - c) == (a+b-c-c) == (b-c)+(a-c) */
|
||||
pc = _mm_add_epi16(pa,pb);
|
||||
|
||||
pa = abs_i16(pa); /* |p-a| */
|
||||
pb = abs_i16(pb); /* |p-b| */
|
||||
pc = abs_i16(pc); /* |p-c| */
|
||||
|
||||
smallest = _mm_min_epi16(pc, _mm_min_epi16(pa, pb));
|
||||
|
||||
/* Paeth breaks ties favoring a over b over c. */
|
||||
nearest = if_then_else(_mm_cmpeq_epi16(smallest, pa), a,
|
||||
if_then_else(_mm_cmpeq_epi16(smallest, pb), b,
|
||||
c));
|
||||
|
||||
/* Note `_epi8`: we need addition to wrap modulo 255. */
|
||||
d = _mm_add_epi8(d, nearest);
|
||||
store4(row, _mm_packus_epi16(d,d));
|
||||
|
||||
prev += 4;
|
||||
row += 4;
|
||||
rb -= 4;
|
||||
}
|
||||
}
|
||||
|
||||
#endif /* PNG_INTEL_SSE_IMPLEMENTATION > 0 */
|
||||
#endif /* READ */
|
||||
Vendored
+52
@@ -0,0 +1,52 @@
|
||||
|
||||
/* intel_init.c - SSE2 optimized filter functions
|
||||
*
|
||||
* Copyright (c) 2018 Cosmin Truta
|
||||
* Copyright (c) 2016-2017 Glenn Randers-Pehrson
|
||||
* Written by Mike Klein and Matt Sarett, Google, Inc.
|
||||
* Derived from arm/arm_init.c
|
||||
*
|
||||
* This code is released under the libpng license.
|
||||
* For conditions of distribution and use, see the disclaimer
|
||||
* and license in png.h
|
||||
*/
|
||||
|
||||
#include "../pngpriv.h"
|
||||
|
||||
#ifdef PNG_READ_SUPPORTED
|
||||
#if PNG_INTEL_SSE_IMPLEMENTATION > 0
|
||||
|
||||
void
|
||||
png_init_filter_functions_sse2(png_structp pp, unsigned int bpp)
|
||||
{
|
||||
/* The techniques used to implement each of these filters in SSE operate on
|
||||
* one pixel at a time.
|
||||
* So they generally speed up 3bpp images about 3x, 4bpp images about 4x.
|
||||
* They can scale up to 6 and 8 bpp images and down to 2 bpp images,
|
||||
* but they'd not likely have any benefit for 1bpp images.
|
||||
* Most of these can be implemented using only MMX and 64-bit registers,
|
||||
* but they end up a bit slower than using the equally-ubiquitous SSE2.
|
||||
*/
|
||||
png_debug(1, "in png_init_filter_functions_sse2");
|
||||
if (bpp == 3)
|
||||
{
|
||||
pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub3_sse2;
|
||||
pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg3_sse2;
|
||||
pp->read_filter[PNG_FILTER_VALUE_PAETH-1] =
|
||||
png_read_filter_row_paeth3_sse2;
|
||||
}
|
||||
else if (bpp == 4)
|
||||
{
|
||||
pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub4_sse2;
|
||||
pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg4_sse2;
|
||||
pp->read_filter[PNG_FILTER_VALUE_PAETH-1] =
|
||||
png_read_filter_row_paeth4_sse2;
|
||||
}
|
||||
|
||||
/* No need optimize PNG_FILTER_VALUE_UP. The compiler should
|
||||
* autovectorize.
|
||||
*/
|
||||
}
|
||||
|
||||
#endif /* PNG_INTEL_SSE_IMPLEMENTATION > 0 */
|
||||
#endif /* PNG_READ_SUPPORTED */
|
||||
Reference in New Issue
Block a user