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/* Prevent the stack from becoming executable for no reason... */
#if defined(__linux__) && defined(__ELF__)
.section .note.GNU-stack,"",%progbits
#endif
.text
.fpu neon
.arch armv7a
.altmacro
/* void blend_8_pixels_argb32_on_rgb16_neon(quint16 *dst, const quint32 *src, int const_alpha) */
.func blend_8_pixels_argb32_on_rgb16_neon
.global blend_8_pixels_argb32_on_rgb16_neon
/* For ELF format also set function visibility to hidden */
#ifdef __ELF__
.hidden blend_8_pixels_argb32_on_rgb16_neon
.type blend_8_pixels_argb32_on_rgb16_neon, %function
#endif
blend_8_pixels_argb32_on_rgb16_neon:
vld4.8 { d0, d1, d2, d3 }, [r1]
vld1.16 { d4, d5 }, [r0]
cmp r2, #256
beq .blend_32_inner
vdup.8 d6, r2
/* multiply by const_alpha */
vmull.u8 q8, d6, d0
vmull.u8 q9, d6, d1
vmull.u8 q10, d6, d2
vmull.u8 q11, d6, d3
vshrn.u16 d0, q8, #8
vshrn.u16 d1, q9, #8
vshrn.u16 d2, q10, #8
vshrn.u16 d3, q11, #8
.blend_32_inner:
/* convert 8 r5g6b5 pixel data from {d4, d5} to planar 8-bit format
and put data into d6 - red, d7 - green, d30 - blue */
vshrn.u16 d6, q2, #8
vshrn.u16 d7, q2, #3
vsli.u16 q2, q2, #5
vsri.u8 d6, d6, #5
vmvn.8 d3, d3
vsri.u8 d7, d7, #6
vshrn.u16 d30, q2, #2
pld [r0, #128]
/* now do alpha blending, storing results in 8-bit planar format
into d16 - red, d19 - green, d18 - blue */
vmull.u8 q10, d3, d6
vmull.u8 q11, d3, d7
vmull.u8 q12, d3, d30
vrshr.u16 q13, q10, #8
vrshr.u16 q3, q11, #8
vrshr.u16 q15, q12, #8
vraddhn.u16 d20, q10, q13
vraddhn.u16 d23, q11, q3
vraddhn.u16 d22, q12, q15
vqadd.u8 d16, d2, d20
vqadd.u8 q9, q0, q11
/* convert the result to r5g6b5 and store it into {d28, d29} */
vshll.u8 q14, d16, #8
vshll.u8 q8, d19, #8
vshll.u8 q9, d18, #8
vsri.u16 q14, q8, #5
vsri.u16 q14, q9, #11
vst1.16 { d28, d29 }, [r0]
bx lr
.endfunc
/* void blend_8_pixels_rgb16_on_rgb16_neon(quint16 *dst, const quint16 *src, int const_alpha) */
.func blend_8_pixels_rgb16_on_rgb16_neon
.global blend_8_pixels_rgb16_on_rgb16_neon
/* For ELF format also set function visibility to hidden */
#ifdef __ELF__
.hidden blend_8_pixels_rgb16_on_rgb16_neon
.type blend_8_pixels_rgb16_on_rgb16_neon, %function
#endif
blend_8_pixels_rgb16_on_rgb16_neon:
vld1.16 { d0, d1 }, [r0]
vld1.16 { d2, d3 }, [r1]
rsb r3, r2, #256
vdup.8 d4, r2
vdup.8 d5, r3
/* convert 8 r5g6b5 pixel data from {d0, d1} to planar 8-bit format
and put data into d6 - red, d7 - green, d30 - blue */
vshrn.u16 d6, q0, #8
vshrn.u16 d7, q0, #3
vsli.u16 q0, q0, #5
vsri.u8 d6, d6, #5
vsri.u8 d7, d7, #6
vshrn.u16 d30, q0, #2
/* same from {d2, d3} into {d26, d27, d28} */
vshrn.u16 d26, q1, #8
vshrn.u16 d27, q1, #3
vsli.u16 q1, q1, #5
vsri.u8 d26, d26, #5
vsri.u8 d27, d27, #6
vshrn.u16 d28, q1, #2
/* multiply dst by inv const_alpha */
vmull.u8 q10, d5, d6
vmull.u8 q11, d5, d7
vmull.u8 q12, d5, d30
vshrn.u16 d6, q10, #8
vshrn.u16 d7, q11, #8
vshrn.u16 d30, q12, #8
/* multiply src by const_alpha */
vmull.u8 q10, d4, d26
vmull.u8 q11, d4, d27
vmull.u8 q12, d4, d28
vshrn.u16 d26, q10, #8
vshrn.u16 d27, q11, #8
vshrn.u16 d28, q12, #8
/* preload dst + 128 */
pld [r0, #128]
/* add components, storing results in 8-bit planar format
into d16 - red, d19 - green, d18 - blue */
vadd.u8 d16, d26, d6
vadd.u8 d19, d27, d7
vadd.u8 d18, d28, d30
/* convert the result to r5g6b5 and store it into {d28, d29} */
vshll.u8 q14, d16, #8
vshll.u8 q8, d19, #8
vshll.u8 q9, d18, #8
vsri.u16 q14, q8, #5
vsri.u16 q14, q9, #11
vst1.16 { d28, d29 }, [r0]
bx lr
.endfunc
/* void qt_rotate90_16_neon(quint16 *dst, const quint16 *src, int sstride, int dstride, int count) */
.func qt_rotate90_16_neon
.global qt_rotate90_16_neon
/* For ELF format also set function visibility to hidden */
#ifdef __ELF__
.hidden qt_rotate90_16_neon
.type qt_rotate90_16_neon, %function
#endif
qt_rotate90_16_neon:
push { r4-r11, lr }
ldr r5, [sp, #(9*4)]
/* The preloads are the key to getting good performance */
pld [r1]
mov r4, r5, asr #2
add r6, r0, r3
add r7, r6, r3
add r8, r7, r3
add r9, r8, r3
pld [r1, r2]
add r10, r9, r3
add r11, r10, r3
add r3, r3, r11
and r5, r5, #3
pld [r1, r2, lsl #1]
cmp r4, #0
beq .rotate90_16_tail
.rotate90_16_loop:
vld1.16 { q8 }, [r1], r2
pld [r1, r2, lsl #1]
vld1.16 { q9 }, [r1], r2
vld1.16 { q10 }, [r1], r2
vld1.16 { q11 }, [r1], r2
pld [r1]
/* Could have used four quad-word zips instead,
but those take three cycles as opposed to one. */
vzip.16 d16, d20
vzip.16 d17, d21
vzip.16 d18, d22
pld [r1, r2]
vzip.16 d19, d23
vzip.16 d16, d18
vzip.16 d17, d19
pld [r1, r2, lsl #1]
vzip.16 d20, d22
vzip.16 d21, d23
vst1.16 { d23 }, [r0]!
vst1.16 { d21 }, [r6]!
vst1.16 { d19 }, [r7]!
vst1.16 { d17 }, [r8]!
vst1.16 { d22 }, [r9]!
vst1.16 { d20 }, [r10]!
vst1.16 { d18 }, [r11]!
vst1.16 { d16 }, [r3]!
sub r4, r4, #1
cmp r4, #0
bne .rotate90_16_loop
b .rotate90_16_tail
.rotate90_16_tail_loop:
sub r5, r5, #2
vld1.16 { q8 }, [r1], r2
vld1.16 { q9 }, [r1], r2
vzip.16 d16, d18
vzip.16 d17, d19
vst1.32 { d19[1] }, [r0]!
vst1.32 { d19[0] }, [r6]!
vst1.32 { d17[1] }, [r7]!
vst1.32 { d17[0] }, [r8]!
vst1.32 { d18[1] }, [r9]!
vst1.32 { d18[0] }, [r10]!
vst1.32 { d16[1] }, [r11]!
vst1.32 { d16[0] }, [r3]!
.rotate90_16_tail:
cmp r5, #0
bgt .rotate90_16_tail_loop
pop { r4-r11, pc }
.endfunc