From 47d4c4739bafcb9864dc8d1c2b44903ad4f75b68 Mon Sep 17 00:00:00 2001 From: Jens Arnold Date: Sat, 11 Jul 2009 23:43:44 +0000 Subject: 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 --- firmware/target/arm/philips/hdd1630/lcd-as-hdd1630.S | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'firmware/target/arm/philips') diff --git a/firmware/target/arm/philips/hdd1630/lcd-as-hdd1630.S b/firmware/target/arm/philips/hdd1630/lcd-as-hdd1630.S index 8f3d12e727..74327dddaf 100644 --- a/firmware/target/arm/philips/hdd1630/lcd-as-hdd1630.S +++ b/firmware/target/arm/philips/hdd1630/lcd-as-hdd1630.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 @@ -248,7 +248,7 @@ 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 @@ -289,7 +289,7 @@ 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 @@ -565,6 +565,6 @@ 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 -- cgit