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Sansa e200v2/Fuze: Optimize YUV blitting by writing 2 pixel at once to the DBOP and removing a few unneeded busy polling status register for fifo empty. Speed up between 50% and 80%.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@24202 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Thomas Martitz 2010-01-08 16:41:36 +00:00
parent 537bea5fac
commit 32b15fc08f
1 changed files with 51 additions and 52 deletions
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103
firmware/target/arm/as3525/lcd-as-e200v2-fuze.S
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@ -51,14 +51,19 @@ lcd_write_yuv420_lines:
@ r0 = yuv_src @ r0 = yuv_src
@ r1 = width @ r1 = width
@ r2 = stride @ r2 = stride
stmfd sp!, { r4-r10, lr } @ save non-scratch stmfd sp!, { r4-r11, lr } @ save non-scratch
mov r3, #0xC8000000 @
orr r3, r3, #0x120000 @ r3 = DBOP_BASE
ldmia r0, { r4, r5, r6 } @ r4 = yuv_src[0] = Y'_p ldmia r0, { r4, r5, r6 } @ r4 = yuv_src[0] = Y'_p
@ r5 = yuv_src[1] = Cb_p @ r5 = yuv_src[1] = Cb_p
@ r6 = yuv_src[2] = Cr_p @ r6 = yuv_src[2] = Cr_p
@ r0 = scratch @ r0 = scratch
sub r2, r2, #1 @ ldr r12, [r3, #8] @
mov r3, #0xC8000000 @ sub r2, r2, #1 @ stride -= 1
orr r3, r3, #0x120000 @ r3 = DBOP_BASE orr r12, r12, #3<<13 @
str r12, [r3, #8] @ DBOP_CTRL |= (1<<13|1<<14) (32bit mode)
10: @ loop line @ 10: @ loop line @
ldrb r7, [r4], #1 @ r7 = *Y'_p++; ldrb r7, [r4], #1 @ r7 = *Y'_p++;
ldrb r8, [r5], #1 @ r8 = *Cb_p++; ldrb r8, [r5], #1 @ r8 = *Cb_p++;
@ -109,12 +114,7 @@ lcd_write_yuv420_lines:
ldrb r12, [r4, r2] @ r12 = Y' = *(Y'_p + stride) ldrb r12, [r4, r2] @ r12 = Y' = *(Y'_p + stride)
@ @
orr r0, r0, lr, lsl #11 @ r0 = (r << 11) | b orr r0, r0, lr, lsl #11 @ r0 = (r << 11) | b
orr r0, r0, r7, lsl #5 @ r0 = (r << 11) | (g << 5) | b orr r11, r0, r7, lsl #5 @ r0 = (r << 11) | (g << 5) | b
strh r0, [r3, #0x10] @ write pixel
1: @ busy @
ldr r7, [r3,#0xc] @ r7 = DBOP_STATUS
tst r7, #DBOP_BUSY @ fifo not empty?
beq 1b @
@ @
sub r7, r12, #16 @ r7 = Y = (Y' - 16)*74 sub r7, r12, #16 @ r7 = Y = (Y' - 16)*74
add r12, r7, r7, asl #2 @ add r12, r7, r7, asl #2 @
@ -143,11 +143,8 @@ lcd_write_yuv420_lines:
@ @
orr r0, r0, lr, lsl #11 @ r0 = (r << 11) | b orr r0, r0, lr, lsl #11 @ r0 = (r << 11) | b
orr r0, r0, r7, lsl #5 @ r0 = (r << 11) | (g << 5) | b orr r0, r0, r7, lsl #5 @ r0 = (r << 11) | (g << 5) | b
strh r0, [r3, #0x10] @ write pixel orr r0, r11, r0, lsl#16 @ pack with 2nd pixel
1: @ busy @ str r0, [r3, #0x10] @ write pixel
ldr r7, [r3,#0xc] @ r7 = DBOP_STATUS
tst r7, #DBOP_BUSY @ fifo not empty?
beq 1b @
@ @
sub r7, r12, #16 @ r7 = Y = (Y' - 16)*74 sub r7, r12, #16 @ r7 = Y = (Y' - 16)*74
add r12, r7, r7, asl #2 @ add r12, r7, r7, asl #2 @
@ -176,12 +173,7 @@ lcd_write_yuv420_lines:
@ @
@ @
orr r0, r0, lr, lsl #11 @ r0 = (r << 11) | b orr r0, r0, lr, lsl #11 @ r0 = (r << 11) | b
orr r0, r0, r7, lsl #5 @ r0 = (r << 11) | (g << 5) | b orr r11, r0, r7, lsl #5 @ r0 = (r << 11) | (g << 5) | b
strh r0, [r3, #0x10] @ write pixel
1: @ busy @
ldr r7, [r3,#0xc] @ r7 = DBOP_STATUS
tst r7, #DBOP_BUSY @ fifo not empty?
beq 1b @
@ @
sub r7, r12, #16 @ r7 = Y = (Y' - 16)*74 sub r7, r12, #16 @ r7 = Y = (Y' - 16)*74
add r12, r7, r7, asl #2 @ add r12, r7, r7, asl #2 @
@ -208,16 +200,20 @@ lcd_write_yuv420_lines:
@ @
orr r0, r0, lr, lsl #11 @ r0 = (r << 11) | b orr r0, r0, lr, lsl #11 @ r0 = (r << 11) | b
orr r0, r0, r7, lsl #5 @ r0 = (r << 11) | (g << 5) | b orr r0, r0, r7, lsl #5 @ r0 = (r << 11) | (g << 5) | b
strh r0, [r3, #0x10] @ write pixel orr r0, r11, r0, lsl#16 @ pack with 2nd pixel
1: @ busy @ str r0, [r3, #0x10] @ write pixel
ldr r7, [r3,#0xc] @ r7 = DBOP_STATUS
tst r7, #DBOP_BUSY @ fifo not empty?
beq 1b @
@ @
subs r1, r1, #2 @ subtract block from width subs r1, r1, #2 @ subtract block from width
bgt 10b @ loop line @ bgt 10b @ loop line @
@ @
ldmfd sp!, { r4-r10, pc } @ restore registers and return 1: @ busy
@ writing at max 110*32 its (LCD_WIDTH/2), the fifo is bigger
@ so polling fifo empty after the loops is save
ldr r7, [r3,#0xc] @ r7 = DBOP_STATUS
tst r7, #DBOP_BUSY @ fifo not empty?
beq 1b @
ldmfd sp!, { r4-r11, pc } @ restore registers and return
bx lr @ bx lr @
.ltorg @ dump constant pool .ltorg @ dump constant pool
.size lcd_write_yuv420_lines, .-lcd_write_yuv420_lines .size lcd_write_yuv420_lines, .-lcd_write_yuv420_lines
@ -263,13 +259,18 @@ lcd_write_yuv420_lines_odither:
@ r5 = yuv_src[1] = Cb_p @ r5 = yuv_src[1] = Cb_p
@ r6 = yuv_src[2] = Cr_p @ r6 = yuv_src[2] = Cr_p
@ @
sub r2, r2, #1 @
ldr r14, [sp, #40] @ Line up pattern and kernel quadrant ldr r14, [sp, #40] @ Line up pattern and kernel quadrant
sub r2, r2, #1 @ stride =- 1
eor r14, r14, r3 @ eor r14, r14, r3 @
and r14, r14, #0x2 @ and r14, r14, #0x2 @
mov r14, r14, lsl #6 @ 0x00 or 0x80 mov r14, r14, lsl #6 @ 0x00 or 0x80
mov r3, #0xC8000000 @ mov r3, #0xC8000000 @
orr r3, r3, #0x120000 @ r3 = DBOP_BASE orr r3, r3, #0x120000 @ r3 = DBOP_BASE, need to be redone
@ due to lack of registers
ldr r12, [r3, #8] @
orr r12, r12, #3<<13 @ DBOP_CTRL |= (1<<13|1<<14)
str r12, [r3, #8] @ (32bit mode)
10: @ loop line @ 10: @ loop line @
@ @
ldrb r7, [r4], #1 @ r7 = *Y'_p++; ldrb r7, [r4], #1 @ r7 = *Y'_p++;
@ -339,13 +340,8 @@ lcd_write_yuv420_lines_odither:
and r11, r11, #0xf800 @ pack pixel and r11, r11, #0xf800 @ pack pixel
and r7, r7, #0x7e00 @ r0 = pixel = (r & 0xf800) | and r7, r7, #0x7e00 @ r0 = pixel = (r & 0xf800) |
orr r11, r11, r7, lsr #4 @ ((g & 0x7e00) >> 4) | orr r11, r11, r7, lsr #4 @ ((g & 0x7e00) >> 4) |
orr r0, r11, r0, lsr #10 @ (b >> 10) orr r3, r11, r0, lsr #10 @ (b >> 10)
strh r0, [r3, #0x10] @ write pixel @ save pixel
1: @ busy @
ldr r7, [r3,#0xc] @ r7 = DBOP_STATUS
tst r7, #DBOP_BUSY @ fifo not empty?
beq 1b @
@
sub r7, r12, #16 @ r7 = Y = (Y' - 16)*149 sub r7, r12, #16 @ r7 = Y = (Y' - 16)*149
add r12, r7, r7, asl #2 @ add r12, r7, r7, asl #2 @
add r12, r12, r12, asl #4 @ add r12, r12, r12, asl #4 @
@ -389,11 +385,11 @@ lcd_write_yuv420_lines_odither:
and r7, r7, #0x7e00 @ r0 = pixel = (r & 0xf800) | and r7, r7, #0x7e00 @ r0 = pixel = (r & 0xf800) |
orr r11, r11, r7, lsr #4 @ ((g & 0x7e00) >> 4) | orr r11, r11, r7, lsr #4 @ ((g & 0x7e00) >> 4) |
orr r0, r11, r0, lsr #10 @ (b >> 10) orr r0, r11, r0, lsr #10 @ (b >> 10)
strh r0, [r3, #0x10] @ write pixel orr r3, r3, r0, lsl#16 @ pack with 2nd pixel
1: @ busy @ mov r0, #0xC8000000 @
ldr r7, [r3,#0xc] @ r7 = DBOP_STATUS orr r0, r0, #0x120000 @ r3 = DBOP_BASE
tst r7, #DBOP_BUSY @ fifo not empty?
beq 1b @ str r3, [r0, #0x10] @ write pixel
@ @
sub r7, r12, #16 @ r7 = Y = (Y' - 16)*149 sub r7, r12, #16 @ r7 = Y = (Y' - 16)*149
add r12, r7, r7, asl #2 @ add r12, r7, r7, asl #2 @
@ -439,12 +435,8 @@ lcd_write_yuv420_lines_odither:
and r11, r11, #0xf800 @ pack pixel and r11, r11, #0xf800 @ pack pixel
and r7, r7, #0x7e00 @ r0 = pixel = (r & 0xf800) | and r7, r7, #0x7e00 @ r0 = pixel = (r & 0xf800) |
orr r11, r11, r7, lsr #4 @ ((g & 0x7e00) >> 4) | orr r11, r11, r7, lsr #4 @ ((g & 0x7e00) >> 4) |
orr r0, r11, r0, lsr #10 @ (b >> 10) orr r3, r11, r0, lsr #10 @ (b >> 10)
strh r0, [r3, #0x10] @ write pixel @ save pixel
1: @ busy @
ldr r7, [r3,#0xc] @ r7 = DBOP_STATUS
tst r7, #DBOP_BUSY @ fifo not empty?
beq 1b @
@ @
sub r7, r12, #16 @ r7 = Y = (Y' - 16)*149 sub r7, r12, #16 @ r7 = Y = (Y' - 16)*149
add r12, r7, r7, asl #2 @ add r12, r7, r7, asl #2 @
@ -487,15 +479,22 @@ lcd_write_yuv420_lines_odither:
and r7, r7, #0x7e00 @ r0 = pixel = (r & 0xf800) | and r7, r7, #0x7e00 @ r0 = pixel = (r & 0xf800) |
orr r11, r11, r7, lsr #4 @ ((g & 0x7e00) >> 4) | orr r11, r11, r7, lsr #4 @ ((g & 0x7e00) >> 4) |
orr r0, r11, r0, lsr #10 @ (b >> 10) orr r0, r11, r0, lsr #10 @ (b >> 10)
strh r0, [r3, #0x10] @ write pixel orr r3, r3, r0, lsl#16 @ pack with 2nd pixel
1: @ busy @ mov r0, #0xC8000000 @
ldr r7, [r3,#0xc] @ r7 = DBOP_STATUS orr r0, r0, #0x120000 @ r3 = DBOP_BASE
tst r7, #DBOP_BUSY @ fifo not empty?
beq 1b @ str r3, [r0, #0x10] @ write pixel
@ @
subs r1, r1, #2 @ subtract block from width subs r1, r1, #2 @ subtract block from width
bgt 10b @ loop line @ bgt 10b @ loop line @
@ @
1: @ busy @
@ writing at max 110*32 its (LCD_WIDTH/2), the fifo is bigger
@ so polling fifo empty after the loops is save
ldr r7, [r0,#0xc] @ r7 = DBOP_STATUS
tst r7, #DBOP_BUSY @ fifo not empty?
beq 1b @
ldmfd sp!, { r4-r11, pc } @ restore registers and return ldmfd sp!, { r4-r11, pc } @ restore registers and return
.ltorg @ dump constant pool .ltorg @ dump constant pool
.size lcd_write_yuv420_lines_odither, .-lcd_write_yuv420_lines_odither .size lcd_write_yuv420_lines_odither, .-lcd_write_yuv420_lines_odither