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Using ARM Unified Assembler Language

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Change-Id: Iae32a8ba8eff6087330e458fafc912a12fee4509
This commit is contained in:
Chris Chua 2023-03-19 06:22:08 +11:00 • committed by Aidan MacDonald
parent a64cad847e
commit 86429dbf1e
23 changed files with 139 additions and 127 deletions
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32
firmware/target/arm/ata-as-arm.S
View file

@ -139,9 +139,9 @@ copy_read_sectors:
.r_end2_u:
tst r1, #1 /* one halfword left? */
ldrneh r4, [r2]
ldrhne r4, [r2]
orrne r3, r3, r4, lsl #8
strneh r3, [r0], #2
strhne r3, [r0], #2
movne r3, r4, lsr #8
strb r3, [r0], #1 /* store final byte */
@ -151,8 +151,8 @@ copy_read_sectors:
/* 16-bit aligned */
.r_aligned:
tst r0, #2 /* 32 bit aligned? */
ldrneh r3, [r2] /* no: read first halfword */
strneh r3, [r0], #2 /* store */
ldrhne r3, [r2] /* no: read first halfword */
strhne r3, [r0], #2 /* store */
subne r1, r1, #1 /* one halfword taken */
sub r1, r1, #8 /* adjust for zero-check and doing 8 halfwords/loop */
@ -186,14 +186,14 @@ copy_read_sectors:
.r_end4_a:
tst r1, #2 /* 2 or more halfwords left? */
ldrneh r3, [r2]
ldrneh r4, [r2]
ldrhne r3, [r2]
ldrhne r4, [r2]
orrne r3, r3, r4, lsl #16
strne r3, [r0], #4
tst r1, #1 /* one halfword left? */
ldrneh r3, [r2]
strneh r3, [r0], #2
ldrhne r3, [r2]
strhne r3, [r0], #2
ldmpc regs=r4-r5
@ -291,9 +291,9 @@ copy_write_sectors:
.w_end2_u:
tst r1, #1 /* one halfword left? */
ldrneh r4, [r0], #2
ldrhne r4, [r0], #2
orrne r3, r3, r4, lsl #8
strneh r3, [r2]
strhne r3, [r2]
movne r3, r3, lsr #16
ldrb r4, [r0], #1 /* load final byte */
@ -305,8 +305,8 @@ copy_write_sectors:
/* 16-bit aligned */
.w_aligned:
tst r0, #2 /* 32 bit aligned? */
ldrneh r3, [r0], #2 /* no: load first halfword */
strneh r3, [r2] /* write */
ldrhne r3, [r0], #2 /* no: load first halfword */
strhne r3, [r2] /* write */
subne r1, r1, #1 /* one halfword taken */
sub r1, r1, #8 /* adjust for zero-check and doing 8 halfwords/loop */
@ -341,13 +341,13 @@ copy_write_sectors:
tst r1, #2 /* 2 or more halfwords left? */
ldrne r3, [r0], #4
strneh r3, [r2]
strhne r3, [r2]
movne r3, r3, lsr #16
strneh r3, [r2]
strhne r3, [r2]
tst r1, #1 /* one halfword left? */
ldrneh r3, [r0], #2
strneh r3, [r2]
ldrhne r3, [r0], #2
strhne r3, [r2]
ldmpc regs=r4-r5

26
firmware/target/arm/ipod/video/lcd-as-video.S
View file

@ -40,24 +40,24 @@ lcd_write_data: /* r1 = pixel count, must be even */
subs r1, r1, #16
.loop16:
ldmgeia r0!, {r2-r3}
stmgeia lr, {r2-r3}
ldmgeia r0!, {r2-r3}
stmgeia lr, {r2-r3}
ldmgeia r0!, {r2-r3}
stmgeia lr, {r2-r3}
ldmgeia r0!, {r2-r3}
stmgeia lr, {r2-r3}
subges r1, r1, #16
ldmiage r0!, {r2-r3}
stmiage lr, {r2-r3}
ldmiage r0!, {r2-r3}
stmiage lr, {r2-r3}
ldmiage r0!, {r2-r3}
stmiage lr, {r2-r3}
ldmiage r0!, {r2-r3}
stmiage lr, {r2-r3}
subsge r1, r1, #16
bge .loop16
/* no need to correct the count, we're just checking bits from now */
tst r1, #8
ldmneia r0!, {r2-r4, r12}
stmneia lr, {r2-r4, r12}
ldmiane r0!, {r2-r4, r12}
stmiane lr, {r2-r4, r12}
tst r1, #4
ldmneia r0!, {r2-r3}
stmneia lr, {r2-r3}
ldmiane r0!, {r2-r3}
stmiane lr, {r2-r3}
tst r1, #2
ldrne r3, [r0], #4
strne r3, [lr]

5
firmware/target/arm/pcm-telechips.c
View file

@ -218,6 +218,7 @@ void fiq_handler(void)
* r0-r3 and r12 is a working register.
*/
asm volatile (
".syntax unified \n"
"sub lr, lr, #4 \n"
"stmfd sp!, { r0-r3, lr } \n" /* stack scratch regs and lr */
"mov r14, #0 \n" /* Was the callback called? */
@ -251,7 +252,7 @@ void fiq_handler(void)
"stmia r11, { r8-r9 } \n" /* save p and size */
"cmp r14, #0 \n" /* Callback called? */
"ldmeqfd sp!, { r0-r3, pc }^ \n" /* no? -> exit */
"ldmfdeq sp!, { r0-r3, pc }^ \n" /* no? -> exit */
"ldr r1, =pcm_play_status_callback \n"
"ldr r1, [r1] \n"
@ -268,7 +269,7 @@ void fiq_handler(void)
"mov lr, pc \n"
"ldr pc, =pcm_play_dma_complete_callback \n"
"cmp r0, #0 \n" /* any more to play? */
"ldmneia r11, { r8-r9 } \n" /* load new p and size */
"ldmiane r11, { r8-r9 } \n" /* load new p and size */
"cmpne r9, #0x0f \n" /* did we actually get enough data? */
"bhi .fill_fifo \n" /* not stop and enough? refill */
"ldmfd sp!, { r0-r3, pc }^ \n" /* exit */

7
firmware/target/arm/pp/pcm-pp.c
View file

@ -327,6 +327,7 @@ void fiq_playback(void)
*/
asm volatile (
/* No external calls */
".syntax unified \n"
"sub lr, lr, #4 \n" /* Prepare return address */
"stmfd sp!, { lr } \n" /* stack lr so we can use it */
"ldr r12, =0xcf001040 \n" /* Some magic from iPodLinux ... */
@ -349,8 +350,8 @@ void fiq_playback(void)
"bhi 0b \n" /* ... yes, continue */
"cmp r9, #0 \n" /* either FIFO full or size empty? */
"stmneia r11, { r8-r9 } \n" /* save p and size, if not empty */
"ldmnefd sp!, { pc }^ \n" /* RFE if not empty */
"stmiane r11, { r8-r9 } \n" /* save p and size, if not empty */
"ldmfdne sp!, { pc }^ \n" /* RFE if not empty */
/* Making external calls */
"1: \n"
@ -363,7 +364,7 @@ void fiq_playback(void)
"mov lr, pc \n" /* long call (not in same section) */
"bx r3 \n"
"cmp r0, #0 \n" /* more data? */
"ldmeqfd sp!, { r0-r3, pc }^ \n" /* no? -> exit */
"ldmfdeq sp!, { r0-r3, pc }^ \n" /* no? -> exit */
"ldr r14, [r10, #0x1c] \n" /* read IISFIFO_CFG to check FIFO status */
"ands r14, r14, #(0xe<<23) \n" /* r14 = (IIS_TX_FREE_COUNT & ~1) << 23 */