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libpng/arm/filter_neon.S

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ArmAsm
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[libpng15] Added support for ARM processor (Mans Rullgard)
2011-11-03 01:47:55 -04:00
/* filter_neon.S - NEON optimised filter functions
*
[libpng16] Added ".align 2" to arm/filter_neon.S to support old GAS assemblers that don't do alignment correctly.
2014-11-29 17:27:27 -05:00
* Copyright (c) 2014 Glenn Randers-Pehrson
[libpng15] Imported from libpng-1.5.7beta03.tar
2011-11-17 00:03:52 -05:00
* Written by Mans Rullgard, 2011.
[libpng16] Added ".align 2" to arm/filter_neon.S to support old GAS assemblers that don't do alignment correctly.
2014-11-29 17:27:27 -05:00
* Last changed in libpng 1.6.16 [(PENDING RELEASE)]
[libpng15] Added support for ARM processor (Mans Rullgard)
2011-11-03 01:47:55 -04:00
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
* and license in png.h
*/
[libpng16] Added ".align 2" to arm/filter_neon.S to support old GAS assemblers that don't do alignment correctly.
2014-11-29 17:27:27 -05:00
/* This is required to get the symbol renames, which are #defines, and the
* definitions (or not) of PNG_ARM_NEON_OPT and PNG_ARM_NEON_IMPLEMENTATION.
[libpng16] Bump version to 1.6.1beta05
2013-03-02 15:58:22 -05:00
*/
#define PNG_VERSION_INFO_ONLY
#include "../pngpriv.h"
[libpng15] Bump version to libpng-1.5.7beta03
2011-11-16 15:30:24 -05:00
#if defined(__linux__) && defined(__ELF__)
.section .note.GNU-stack,"",%progbits /* mark stack as non-executable */
#endif
[libpng16] Added ".align 2" to arm/filter_neon.S to support old GAS assemblers that don't do alignment correctly.
2014-11-29 17:27:27 -05:00
#ifdef PNG_READ_SUPPORTED
[libpng16] Fix compilation errors in filter_neon_intrinsics.c Use filter_neon_intrinsics.c in preference to filter_neon.S when possible.
2013-10-15 22:19:56 -04:00
/* Assembler NEON support - only works for 32-bit ARM (i.e. it does not work for
* ARM64). The code in arm/filter_neon_intrinsics.c supports ARM64, however it
[libpng16] Cleaned up ARM NEON compilation handling. The tests are now in pngpriv.h and detect the broken GCC compilers.
2013-10-18 16:28:00 -04:00
* only works if -mfpu=neon is specified on the GCC command line. See pngpriv.h
* for the logic which sets PNG_USE_ARM_NEON_ASM:
[libpng16] Fix compilation errors in filter_neon_intrinsics.c Use filter_neon_intrinsics.c in preference to filter_neon.S when possible.
2013-10-15 22:19:56 -04:00
*/
[libpng16] Changed NEON implementation selection mechanism to allow assembler or intrinsics to be turned on during the build by defining PNG_ARM_NEON_IMPLEMENTATION to the correct value (2 or 1). The default is "undefined" and the build type is selected in pngpriv.h.
2013-10-25 17:11:57 -04:00
#if PNG_ARM_NEON_IMPLEMENTATION == 2 /* hand-coded assembler */
[libpng16] Fix compilation errors in filter_neon_intrinsics.c Use filter_neon_intrinsics.c in preference to filter_neon.S when possible.
2013-10-15 22:19:56 -04:00
[libpng16] Removed PNG_FILTER_OPTIMIZATIONS and PNG_ARM_NEON_SUPPORTED from pnglibconf.h, allowing more of the decisions to be made internally (pngpriv.h) during the compile. Without this, symbol prefixing is broken under certain circumstances on ARM platforms. Now only the API parts of the optimizations ('check' vs 'api') are exposed in the public header files except that the new setting PNG_ARM_NEON_OPT documents how libpng makes the decision about whether or not to use the optimizations.
2013-06-08 14:07:13 -04:00
#if PNG_ARM_NEON_OPT > 0
[libpng16] Revised stack marking in arm/filter_neon.S and configure.ac.
2013-04-25 10:53:57 -04:00
[libpng15] Added support for ARM processor (Mans Rullgard)
2011-11-03 01:47:55 -04:00
#ifdef __ELF__
# define ELF
#else
# define ELF @
#endif
.arch armv7-a
.fpu neon
.macro func name, export=0
.macro endfunc
ELF .size \name, . - \name
.endfunc
.purgem endfunc
.endm
.text
[libpng16] Added ".align 2" to arm/filter_neon.S to support old GAS assemblers that don't do alignment correctly.
2014-11-29 17:27:27 -05:00
/* Explicitly specifying alignment here because some versions of
* GAS don't align code correctly. This is harmless in correctly
* written versions of GAS.
*/
.align 2
[libpng15] Added support for ARM processor (Mans Rullgard)
2011-11-03 01:47:55 -04:00
.if \export
.global \name
.endif
ELF .type \name, STT_FUNC
.func \name
\name:
.endm
func png_read_filter_row_sub4_neon, export=1
ldr r3, [r0, #4] @ rowbytes
vmov.i8 d3, #0
1:
vld4.32 {d4[],d5[],d6[],d7[]}, [r1,:128]
vadd.u8 d0, d3, d4
vadd.u8 d1, d0, d5
vadd.u8 d2, d1, d6
vadd.u8 d3, d2, d7
vst4.32 {d0[0],d1[0],d2[0],d3[0]},[r1,:128]!
subs r3, r3, #16
bgt 1b
bx lr
endfunc
func png_read_filter_row_sub3_neon, export=1
ldr r3, [r0, #4] @ rowbytes
vmov.i8 d3, #0
mov r0, r1
mov r2, #3
mov r12, #12
vld1.8 {q11}, [r0], r12
1:
vext.8 d5, d22, d23, #3
vadd.u8 d0, d3, d22
vext.8 d6, d22, d23, #6
vadd.u8 d1, d0, d5
vext.8 d7, d23, d23, #1
vld1.8 {q11}, [r0], r12
vst1.32 {d0[0]}, [r1,:32], r2
vadd.u8 d2, d1, d6
vst1.32 {d1[0]}, [r1], r2
vadd.u8 d3, d2, d7
vst1.32 {d2[0]}, [r1], r2
vst1.32 {d3[0]}, [r1], r2
subs r3, r3, #12
bgt 1b
bx lr
endfunc
func png_read_filter_row_up_neon, export=1
ldr r3, [r0, #4] @ rowbytes
1:
vld1.8 {q0}, [r1,:128]
vld1.8 {q1}, [r2,:128]!
vadd.u8 q0, q0, q1
vst1.8 {q0}, [r1,:128]!
subs r3, r3, #16
bgt 1b
bx lr
endfunc
func png_read_filter_row_avg4_neon, export=1
ldr r12, [r0, #4] @ rowbytes
vmov.i8 d3, #0
1:
vld4.32 {d4[],d5[],d6[],d7[]}, [r1,:128]
vld4.32 {d16[],d17[],d18[],d19[]},[r2,:128]!
vhadd.u8 d0, d3, d16
vadd.u8 d0, d0, d4
vhadd.u8 d1, d0, d17
vadd.u8 d1, d1, d5
vhadd.u8 d2, d1, d18
vadd.u8 d2, d2, d6
vhadd.u8 d3, d2, d19
vadd.u8 d3, d3, d7
vst4.32 {d0[0],d1[0],d2[0],d3[0]},[r1,:128]!
subs r12, r12, #16
bgt 1b
bx lr
endfunc
func png_read_filter_row_avg3_neon, export=1
push {r4,lr}
ldr r12, [r0, #4] @ rowbytes
vmov.i8 d3, #0
mov r0, r1
mov r4, #3
mov lr, #12
vld1.8 {q11}, [r0], lr
1:
vld1.8 {q10}, [r2], lr
vext.8 d5, d22, d23, #3
vhadd.u8 d0, d3, d20
vext.8 d17, d20, d21, #3
vadd.u8 d0, d0, d22
vext.8 d6, d22, d23, #6
vhadd.u8 d1, d0, d17
vext.8 d18, d20, d21, #6
vadd.u8 d1, d1, d5
vext.8 d7, d23, d23, #1
vld1.8 {q11}, [r0], lr
vst1.32 {d0[0]}, [r1,:32], r4
vhadd.u8 d2, d1, d18
vst1.32 {d1[0]}, [r1], r4
vext.8 d19, d21, d21, #1
vadd.u8 d2, d2, d6
vhadd.u8 d3, d2, d19
vst1.32 {d2[0]}, [r1], r4
vadd.u8 d3, d3, d7
vst1.32 {d3[0]}, [r1], r4
subs r12, r12, #12
bgt 1b
pop {r4,pc}
endfunc
.macro paeth rx, ra, rb, rc
vaddl.u8 q12, \ra, \rb @ a + b
vaddl.u8 q15, \rc, \rc @ 2*c
vabdl.u8 q13, \rb, \rc @ pa
vabdl.u8 q14, \ra, \rc @ pb
vabd.u16 q15, q12, q15 @ pc
vcle.u16 q12, q13, q14 @ pa <= pb
vcle.u16 q13, q13, q15 @ pa <= pc
vcle.u16 q14, q14, q15 @ pb <= pc
vand q12, q12, q13 @ pa <= pb && pa <= pc
vmovn.u16 d28, q14
vmovn.u16 \rx, q12
vbsl d28, \rb, \rc
vbsl \rx, \ra, d28
.endm
func png_read_filter_row_paeth4_neon, export=1
ldr r12, [r0, #4] @ rowbytes
vmov.i8 d3, #0
vmov.i8 d20, #0
1:
vld4.32 {d4[],d5[],d6[],d7[]}, [r1,:128]
vld4.32 {d16[],d17[],d18[],d19[]},[r2,:128]!
paeth d0, d3, d16, d20
vadd.u8 d0, d0, d4
paeth d1, d0, d17, d16
vadd.u8 d1, d1, d5
paeth d2, d1, d18, d17
vadd.u8 d2, d2, d6
paeth d3, d2, d19, d18
vmov d20, d19
vadd.u8 d3, d3, d7
vst4.32 {d0[0],d1[0],d2[0],d3[0]},[r1,:128]!
subs r12, r12, #16
bgt 1b
bx lr
endfunc
func png_read_filter_row_paeth3_neon, export=1
push {r4,lr}
ldr r12, [r0, #4] @ rowbytes
vmov.i8 d3, #0
vmov.i8 d4, #0
mov r0, r1
mov r4, #3
mov lr, #12
vld1.8 {q11}, [r0], lr
1:
vld1.8 {q10}, [r2], lr
paeth d0, d3, d20, d4
vext.8 d5, d22, d23, #3
vadd.u8 d0, d0, d22
vext.8 d17, d20, d21, #3
paeth d1, d0, d17, d20
vst1.32 {d0[0]}, [r1,:32], r4
vext.8 d6, d22, d23, #6
vadd.u8 d1, d1, d5
vext.8 d18, d20, d21, #6
paeth d2, d1, d18, d17
vext.8 d7, d23, d23, #1
vld1.8 {q11}, [r0], lr
vst1.32 {d1[0]}, [r1], r4
vadd.u8 d2, d2, d6
vext.8 d19, d21, d21, #1
paeth d3, d2, d19, d18
vst1.32 {d2[0]}, [r1], r4
vmov d4, d19
vadd.u8 d3, d3, d7
vst1.32 {d3[0]}, [r1], r4
subs r12, r12, #12
bgt 1b
pop {r4,pc}
endfunc
[libpng16] Removed PNG_FILTER_OPTIMIZATIONS and PNG_ARM_NEON_SUPPORTED from pnglibconf.h, allowing more of the decisions to be made internally (pngpriv.h) during the compile. Without this, symbol prefixing is broken under certain circumstances on ARM platforms. Now only the API parts of the optimizations ('check' vs 'api') are exposed in the public header files except that the new setting PNG_ARM_NEON_OPT documents how libpng makes the decision about whether or not to use the optimizations.
2013-06-08 14:07:13 -04:00
#endif /* PNG_ARM_NEON_OPT > 0 */
[libpng16] Changed NEON implementation selection mechanism to allow assembler or intrinsics to be turned on during the build by defining PNG_ARM_NEON_IMPLEMENTATION to the correct value (2 or 1). The default is "undefined" and the build type is selected in pngpriv.h.
2013-10-25 17:11:57 -04:00
#endif /* PNG_ARM_NEON_IMPLEMENTATION == 2 (assembler) */
[libpng16] Added ".align 2" to arm/filter_neon.S to support old GAS assemblers that don't do alignment correctly.
2014-11-29 17:27:27 -05:00
#endif /* READ */
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