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| author | Jens Arnold <amiconn@rockbox.org> | 2009-07-11 23:43:44 +0000 |
|---|---|---|
| committer | Jens Arnold <amiconn@rockbox.org> | 2009-07-11 23:43:44 +0000 |
| commit | 47d4c4739bafcb9864dc8d1c2b44903ad4f75b68 (patch) | |
| tree | 7a9f510c72a0df2ddacb0f6ec393658cf676b8d4 /firmware/target/arm/iriver | |
| parent | fa59ed6ae724b3f75c8ba35efcf7ce18f21e3ed2 (diff) | |
| download | rockbox-47d4c4739bafcb9864dc8d1c2b44903ad4f75b68.tar.gz rockbox-47d4c4739bafcb9864dc8d1c2b44903ad4f75b68.zip | |
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.S | 8 |
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: | |||
| 49 | @ r0 = yuv_src | 49 | @ r0 = yuv_src |
| 50 | @ r1 = width | 50 | @ r1 = width |
| 51 | @ r2 = stride | 51 | @ r2 = stride |
| 52 | stmfd sp!, { r4-r12, lr } @ save non-scratch | 52 | stmfd sp!, { r4-r11, lr } @ save non-scratch |
| 53 | ldmia r0, { r4, r5, r6 } @ r4 = yuv_src[0] = Y'_p | 53 | ldmia r0, { r4, r5, r6 } @ r4 = yuv_src[0] = Y'_p |
| 54 | @ r5 = yuv_src[1] = Cb_p | 54 | @ r5 = yuv_src[1] = Cb_p |
| 55 | @ r6 = yuv_src[2] = Cr_p | 55 | @ r6 = yuv_src[2] = Cr_p |
| @@ -232,7 +232,7 @@ lcd_write_yuv420_lines: | |||
| 232 | subs r1, r1, #2 @ subtract block from width | 232 | subs r1, r1, #2 @ subtract block from width |
| 233 | bgt 10b @ loop line @ | 233 | bgt 10b @ loop line @ |
| 234 | @ | 234 | @ |
| 235 | ldmfd sp!, { r4-r12, pc } @ restore registers and return | 235 | ldmfd sp!, { r4-r11, pc } @ restore registers and return |
| 236 | .ltorg @ dump constant pool | 236 | .ltorg @ dump constant pool |
| 237 | .size lcd_write_yuv420_lines, .-lcd_write_yuv420_lines | 237 | .size lcd_write_yuv420_lines, .-lcd_write_yuv420_lines |
| 238 | 238 | ||
| @@ -273,7 +273,7 @@ lcd_write_yuv420_lines_odither: | |||
| 273 | @ r2 = stride | 273 | @ r2 = stride |
| 274 | @ r3 = x_screen | 274 | @ r3 = x_screen |
| 275 | @ [sp] = y_screen | 275 | @ [sp] = y_screen |
| 276 | stmfd sp!, { r4-r12, lr } @ save non-scratch | 276 | stmfd sp!, { r4-r11, lr } @ save non-scratch |
| 277 | ldmia r0, { r4, r5, r6 } @ r4 = yuv_src[0] = Y'_p | 277 | ldmia r0, { r4, r5, r6 } @ r4 = yuv_src[0] = Y'_p |
| 278 | @ r5 = yuv_src[1] = Cb_p | 278 | @ r5 = yuv_src[1] = Cb_p |
| 279 | @ r6 = yuv_src[2] = Cr_p | 279 | @ r6 = yuv_src[2] = Cr_p |
| @@ -533,6 +533,6 @@ lcd_write_yuv420_lines_odither: | |||
| 533 | subs r1, r1, #2 @ subtract block from width | 533 | subs r1, r1, #2 @ subtract block from width |
| 534 | bgt 10b @ loop line @ | 534 | bgt 10b @ loop line @ |
| 535 | @ | 535 | @ |
| 536 | ldmfd sp!, { r4-r12, pc } @ restore registers and return | 536 | ldmfd sp!, { r4-r11, pc } @ restore registers and return |
| 537 | .ltorg @ dump constant pool | 537 | .ltorg @ dump constant pool |
| 538 | .size lcd_write_yuv420_lines_odither, .-lcd_write_yuv420_lines_odither | 538 | .size lcd_write_yuv420_lines_odither, .-lcd_write_yuv420_lines_odither |