virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-23 12:43:46 +02:00
Code Issues Releases Activity

arm: Comment out unused labels in simple_idct_arm

Browse Source 
When building for iOS in thumb mode, gas-preprocessor.pl doesn't
mark unused labels as thumb functions (as it does for other
local labels, where it can figure out that they are functions
due to being referenced in branch instructions). This leads to
linker warnings for some of those local labels, such as:

ld: warning: ARM function not 4-byte aligned: __a_evaluation from
libavcodec/libavcodec.a(simple_idct_arm.o)

Therefore, comment them out since they don't have any function.
They do still have a value in documenting key points in the
assembly source though.

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö 2013-07-24 12:22:55 +03:00
parent 6fd221e5f8
commit 54ba52077c
1 changed files with 8 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
libavcodec/arm/simple_idct_arm.S
View File

@ -83,7 +83,7 @@ __row_loop:
orrs r5, r5, r7 @ R5=R4 | R3 | R2 | R7
beq __almost_empty_row
__b_evaluation:
@@ __b_evaluation:
@@ at this point, R0=block (temp), R1(free), R2=ROWr32[1], R3=ROWr32[2], R4=ROWr32[3],
@@ R5=(temp), R6=ROWr16[0], R7=ROWr16[1], R8-R11 free,
@@ R12=__const_ptr_, R14=&block[n]
@ -159,7 +159,7 @@ __end_b_evaluation:
@@ R5=b2, R6=ROWr16[0], R7=b3, R8 (free), R9 (free), R10 (free), R11 (free),
@@ R12=__const_ptr_, R14=&block[n]
__a_evaluation:
@@ __a_evaluation:
@@ a0 = (W4 * row[0]) + (1 << (ROW_SHIFT - 1));
@@ a1 = a0 + W6 * row[2];
@@ a2 = a0 - W6 * row[2];
@ -295,7 +295,7 @@ __end_row_loop:
add r14, r0, #14 @ R14=&block[7], better start from the last col, and decrease the value until col=0, i.e. R14=block.
__col_loop:
__b_evaluation2:
@@ __b_evaluation2:
@@ at this point, R0=block (temp), R1-R11 (free)
@@ R12=__const_ptr_, R14=&block[n]
@@ proceed with b0-b3 first, followed by a0-a3
@ -357,12 +357,12 @@ __b_evaluation2:
it ne
mlane r1, r10, r4, r1 @ R1-=W5*ROWr16[7x8]=b1
@@ R4 is free now
__end_b_evaluation2:
@@ __end_b_evaluation2:
@@ at this point, R0=b0, R1=b1, R2 (free), R3 (free), R4 (free),
@@ R5=b2, R6 (free), R7=b3, R8 (free), R9 (free), R10 (free), R11 (free),
@@ R12=__const_ptr_, R14=&block[n]
__a_evaluation2:
@@ __a_evaluation2:
@@ a0 = (W4 * col[8x0]) + (1 << (COL_SHIFT - 1));
@@ a1 = a0 + W6 * row[2];
@@ a2 = a0 - W6 * row[2];
@ -414,7 +414,7 @@ __a_evaluation2:
itt ne
subne r2, r2, r10 @ R2-=W2*ROWr16[6] (a1)
addne r3, r3, r10 @ R3+=W2*ROWr16[6] (a2)
__end_a_evaluation2:
@@ __end_a_evaluation2:
@@ at this point, R0=b0, R1=b1, R2=a1, R3=a2, R4=a3,
@@ R5=b2, R6=a0, R7=b3, R8 (free), R9 (free), R10 (free), R11 (free),
@@ R12=__const_ptr_, R14=&block[n]
@ -452,7 +452,7 @@ __end_a_evaluation2:
strh r8, [r14, #96]
strh r9, [r14, #112]
__end_col_loop:
@@ __end_col_loop:
@@ at this point, R0-R11 (free)
@@ R12=__const_ptr_, R14=&block[n]
ldr r0, [sp, #0] @ R0=block
@ -463,7 +463,7 @@ __end_col_loop:
__end_simple_idct_arm:
@@ __end_simple_idct_arm:
@@ restore registers to previous status!
add sp, sp, #8 @@ the local variables!
ldmfd sp!, {r4-r11, r15} @@ update PC with LR content.