[FFmpeg-cvslog] ARM: jrevdct_arm: simplify stack usage

[Mans Rullgard]

ffmpeg | branch: master | Mans Rullgard <mans at mansr.com> | Mon Jun 13 09:33:20 2011 +0100| [9776e25db9a43e77e9b091c012bf16267d9559d7] | committer: Mans Rullgard

ARM: jrevdct_arm: simplify stack usage

Signed-off-by: Mans Rullgard <mans at mansr.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=9776e25db9a43e77e9b091c012bf16267d9559d7
---

 libavcodec/arm/jrevdct_arm.S |    9 +++------
 1 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/libavcodec/arm/jrevdct_arm.S b/libavcodec/arm/jrevdct_arm.S
index 08d42d7..93cbbbe 100644
--- a/libavcodec/arm/jrevdct_arm.S
+++ b/libavcodec/arm/jrevdct_arm.S
@@ -56,9 +56,7 @@
 #define FIX_0xFFFF_ID          48
 
 function ff_j_rev_dct_arm, export=1
-        push {r4 - r12, lr}
-        sub sp, sp, #4                  @ reserve some space on the stack
-        str r0, [ sp ]                  @ save the DCT pointer to the stack
+        push {r0, r4 - r11, lr}
 
         mov lr, r0                      @ lr = pointer to the current row
         mov r12, #8                     @ r12 = row-counter
@@ -208,7 +206,7 @@ end_of_row_loop:
 
 start_column_loop:
         @ Start of column loop
-        ldr lr, [ sp ]
+        pop {lr}
         mov r12, #8
 column_loop:
         ldrsh r0, [lr, #( 0*8)]             @ r0 = 'd0'
@@ -365,8 +363,7 @@ empty_odd_column:
 
 the_end:
         @ The end....
-        add sp, sp, #4
-        pop {r4 - r12, pc}
+        pop {r4 - r11, pc}
 endfunc
 
 const const_array