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authorJens Arnold <amiconn@rockbox.org>2009-07-11 23:43:44 +0000
committerJens Arnold <amiconn@rockbox.org>2009-07-11 23:43:44 +0000
commit47d4c4739bafcb9864dc8d1c2b44903ad4f75b68 (patch)
tree7a9f510c72a0df2ddacb0f6ec393658cf676b8d4 /firmware/target/arm/iriver
parentfa59ed6ae724b3f75c8ba35efcf7ce18f21e3ed2 (diff)
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ARM asm LCD and ATA driver functions: Don't save r12 as it is a scratch reg. Saves a bit of stack and execution time.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21795 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware/target/arm/iriver')
-rw-r--r--firmware/target/arm/iriver/h10/lcd-as-h10.S8
1 files changed, 4 insertions, 4 deletions
diff --git a/firmware/target/arm/iriver/h10/lcd-as-h10.S b/firmware/target/arm/iriver/h10/lcd-as-h10.S
index ba6c876d44..e99eee50c9 100644
--- a/firmware/target/arm/iriver/h10/lcd-as-h10.S
+++ b/firmware/target/arm/iriver/h10/lcd-as-h10.S
@@ -49,7 +49,7 @@ lcd_write_yuv420_lines:
@ r0 = yuv_src
@ r1 = width
@ r2 = stride
- stmfd sp!, { r4-r12, lr } @ save non-scratch
+ stmfd sp!, { r4-r11, lr } @ save non-scratch
ldmia r0, { r4, r5, r6 } @ r4 = yuv_src[0] = Y'_p
@ r5 = yuv_src[1] = Cb_p
@ r6 = yuv_src[2] = Cr_p
@@ -232,7 +232,7 @@ lcd_write_yuv420_lines:
subs r1, r1, #2 @ subtract block from width
bgt 10b @ loop line @
@
- ldmfd sp!, { r4-r12, pc } @ restore registers and return
+ ldmfd sp!, { r4-r11, pc } @ restore registers and return
.ltorg @ dump constant pool
.size lcd_write_yuv420_lines, .-lcd_write_yuv420_lines
@@ -273,7 +273,7 @@ lcd_write_yuv420_lines_odither:
@ r2 = stride
@ r3 = x_screen
@ [sp] = y_screen
- stmfd sp!, { r4-r12, lr } @ save non-scratch
+ stmfd sp!, { r4-r11, lr } @ save non-scratch
ldmia r0, { r4, r5, r6 } @ r4 = yuv_src[0] = Y'_p
@ r5 = yuv_src[1] = Cb_p
@ r6 = yuv_src[2] = Cr_p
@@ -533,6 +533,6 @@ lcd_write_yuv420_lines_odither:
subs r1, r1, #2 @ subtract block from width
bgt 10b @ loop line @
@
- ldmfd sp!, { r4-r12, pc } @ restore registers and return
+ ldmfd sp!, { r4-r11, pc } @ restore registers and return
.ltorg @ dump constant pool
.size lcd_write_yuv420_lines_odither, .-lcd_write_yuv420_lines_odither