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Cabbiev2 gigabeat background: reduce WPS backdrop filesize by storing it as 24 bit BMP instead of unnecessary 32 bit.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16802 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jens Arnold 2008-03-25 19:43:08 +00:00
parent 38ed901284
commit 9a7978aeab
34 changed files with 410 additions and 426 deletions
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125
firmware/target/coldfire/iaudio/lcd-remote-iaudio.c
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@ -64,83 +64,106 @@ bool remote_initialized = false;
static inline void _write_byte(unsigned data)
{
asm volatile (
"move.l (%[gpo0]), %%d0 \n" /* Get current state of data line */
"and.l %[dbit], %%d0 \n"
"move.w %%sr,%%d2 \n" /* Get current interrupt level */
"move.w #0x2700,%%sr \n" /* Disable interrupts */
"move.l (%[gpo0]), %%d0 \n" /* Get current state of data port */
"move.l %%d0, %%d1 \n"
"and.l %[dbit], %%d1 \n" /* Check current state of data line */
"beq.s 1f \n" /* and set it as previous-state bit */
"bset #8, %[data] \n"
"bset #8, %[data] \n"
"1: \n"
"move.l %[data], %%d0 \n" /* Compute the 'bit derivative', i.e. a value */
"lsr.l #1, %%d0 \n" /* with 1's where the data changes from the */
"eor.l %%d0, %[data] \n" /* previous state, and 0's where it doesn't */
"move.l %[data], %%d1 \n" /* Compute the 'bit derivative', i.e. a value */
"lsr.l #1, %%d1 \n" /* with 1's where the data changes from the */
"eor.l %%d1, %[data] \n" /* previous state, and 0's where it doesn't */
"swap %[data] \n" /* Shift data to upper byte */
"lsl.l #8, %[data] \n"
"move.l %[cbit], %%d1 \n" /* Prepare mask for flipping CLK */
"or.l %[dbit], %%d1 \n" /* and DATA at once */
"eor.l %[cbit], %%d0 \n" /* precalculate opposite state of clock line */
"lsl.l #1,%[data] \n" /* Shift out MSB */
"bcc.s 1f \n"
"eor.l %%d1, (%[gpo0]) \n" /* 1: Flip both CLK and DATA */
".word 0x51fa \n" /* (trapf.w - shadow next insn) */
"eor.l %[dbit], %%d0 \n" /* 1: Flip data bit */
"1: \n"
"eor.l %[cbit], (%[gpo0]) \n" /* else flip CLK only */
"eor.l %[cbit], (%[gpo0]) \n" /* Flip CLK again */
"move.l %%d0, %%d1 \n"
"move.l %%d0, (%[gpo0]) \n" /* Output new state and set CLK = 0*/
"eor.l %[cbit], %%d1 \n"
"nop \n"
"lsl.l #1,%[data] \n" /* ..unrolled.. */
"bcc.s 1f \n"
"eor.l %%d1, (%[gpo0]) \n"
".word 0x51fa \n"
"eor.l %[dbit], %%d0 \n"
"1: \n"
"eor.l %[cbit], (%[gpo0]) \n"
"eor.l %[cbit], (%[gpo0]) \n"
"move.l %%d1, (%[gpo0]) \n" /* set CLK = 1 (delayed) */
"move.l %%d0, %%d1 \n"
"move.l %%d0, (%[gpo0]) \n"
"eor.l %[cbit], %%d1 \n"
"nop \n"
"lsl.l #1,%[data] \n"
"lsl.l #1,%[data] \n" /* ..unrolled.. */
"bcc.s 1f \n"
"eor.l %%d1, (%[gpo0]) \n"
".word 0x51fa \n"
"eor.l %[dbit], %%d0 \n"
"1: \n"
"eor.l %[cbit], (%[gpo0]) \n"
"eor.l %[cbit], (%[gpo0]) \n"
"move.l %%d1, (%[gpo0]) \n"
"move.l %%d0, %%d1 \n"
"move.l %%d0, (%[gpo0]) \n"
"eor.l %[cbit], %%d1 \n"
"nop \n"
"lsl.l #1,%[data] \n"
"lsl.l #1,%[data] \n" /* ..unrolled.. */
"bcc.s 1f \n"
"eor.l %%d1, (%[gpo0]) \n"
".word 0x51fa \n"
"eor.l %[dbit], %%d0 \n"
"1: \n"
"eor.l %[cbit], (%[gpo0]) \n"
"eor.l %[cbit], (%[gpo0]) \n"
"move.l %%d1, (%[gpo0]) \n"
"move.l %%d0, %%d1 \n"
"move.l %%d0, (%[gpo0]) \n"
"eor.l %[cbit], %%d1 \n"
"nop \n"
"lsl.l #1,%[data] \n"
"lsl.l #1,%[data] \n" /* ..unrolled.. */
"bcc.s 1f \n"
"eor.l %%d1, (%[gpo0]) \n"
".word 0x51fa \n"
"eor.l %[dbit], %%d0 \n"
"1: \n"
"eor.l %[cbit], (%[gpo0]) \n"
"eor.l %[cbit], (%[gpo0]) \n"
"move.l %%d1, (%[gpo0]) \n"
"move.l %%d0, %%d1 \n"
"move.l %%d0, (%[gpo0]) \n"
"eor.l %[cbit], %%d1 \n"
"nop \n"
"lsl.l #1,%[data] \n"
"lsl.l #1,%[data] \n" /* ..unrolled.. */
"bcc.s 1f \n"
"eor.l %%d1, (%[gpo0]) \n"
".word 0x51fa \n"
"eor.l %[dbit], %%d0 \n"
"1: \n"
"eor.l %[cbit], (%[gpo0]) \n"
"eor.l %[cbit], (%[gpo0]) \n"
"move.l %%d1, (%[gpo0]) \n"
"move.l %%d0, %%d1 \n"
"move.l %%d0, (%[gpo0]) \n"
"eor.l %[cbit], %%d1 \n"
"nop \n"
"lsl.l #1,%[data] \n"
"lsl.l #1,%[data] \n" /* ..unrolled.. */
"bcc.s 1f \n"
"eor.l %%d1, (%[gpo0]) \n"
".word 0x51fa \n"
"eor.l %[dbit], %%d0 \n"
"1: \n"
"eor.l %[cbit], (%[gpo0]) \n"
"eor.l %[cbit], (%[gpo0]) \n"
"move.l %%d1, (%[gpo0]) \n"
"move.l %%d0, %%d1 \n"
"move.l %%d0, (%[gpo0]) \n"
"eor.l %[cbit], %%d1 \n"
"nop \n"
"lsl.l #1,%[data] \n"
"lsl.l #1,%[data] \n" /* ..unrolled.. */
"bcc.s 1f \n"
"eor.l %%d1, (%[gpo0]) \n"
".word 0x51fa \n"
"eor.l %[dbit], %%d0 \n"
"1: \n"
"eor.l %[cbit], (%[gpo0]) \n"
"eor.l %[cbit], (%[gpo0]) \n"
"move.l %%d1, (%[gpo0]) \n"
"move.l %%d0, %%d1 \n"
"move.l %%d0, (%[gpo0]) \n"
"eor.l %[cbit], %%d1 \n"
"nop \n"
"nop \n"
"move.l %%d1, (%[gpo0]) \n" /* set CLK = 1 (delayed) */
"move.w %%d2, %%sr \n" /* Restore interrupt level */
: /* outputs */
[data]"+d"(data)
: /* inputs */
@ -148,7 +171,7 @@ static inline void _write_byte(unsigned data)
[cbit]"d"(0x00004000),
[dbit]"d"(0x00002000)
: /* clobbers */
"d0", "d1"
"d0", "d1", "d2"
);
}
@ -157,7 +180,7 @@ static inline void _write_byte(unsigned data)
static inline void _write_fast(unsigned data)
{
asm volatile (
"move.w %%sr,%%d3 \n" /* Get current interrupt level */
"move.w %%sr,%%d2 \n" /* Get current interrupt level */
"move.w #0x2700,%%sr \n" /* Disable interrupts */
"move.l (%[gpo0]), %%d0 \n" /* Get current state of data port */
@ -239,7 +262,7 @@ static inline void _write_fast(unsigned data)
"move.l %%d1, (%[gpo0]) \n"
"move.l %%d0, (%[gpo0]) \n"
"move.w %%d3, %%sr \n" /* Restore interrupt level */
"move.w %%d2, %%sr \n" /* Restore interrupt level */
: /* outputs */
[data]"+d"(data)
: /* inputs */
@ -247,7 +270,7 @@ static inline void _write_fast(unsigned data)
[cbit]"d"(0x00004000),
[dbit]"d"(0x00002000)
: /* clobbers */
"d0", "d1", "d2", "d3"
"d0", "d1", "d2"
);
}