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ARM: use =const syntax instead of explicit literal pools 

Signed-off-by: Mans Rullgard <mans@mansr.com>
tags/n1.0
Mans Rullgard 13 years ago
parent
998170913c
commit
faa788227f
3 changed files with 35 additions and 74 deletions
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  1. +16
    -40
      libavcodec/arm/simple_idct_arm.S
  2. +7
    -13
      libavcodec/arm/simple_idct_armv5te.S
  3. +12
    -21
      libavcodec/arm/simple_idct_armv6.S

+ 16
- 40
libavcodec/arm/simple_idct_arm.S View File

@@ -25,8 +25,7 @@

#include "libavutil/arm/asm.S"

/* useful constants for the algorithm, they are save in __constant_ptr__ at */
/* the end of the source code.*/
/* useful constants for the algorithm */
#define W1 22725
#define W2 21407
#define W3 19266
@@ -36,16 +35,6 @@
#define W7 4520
#define MASK_MSHW 0xFFFF0000

/* offsets of the constants in the vector */
#define offW1 0
#define offW2 4
#define offW3 8
#define offW4 12
#define offW5 16
#define offW6 20
#define offW7 24
#define offMASK_MSHW 28

#define ROW_SHIFT 11
#define ROW_SHIFT2MSHW (16-11)
#define COL_SHIFT 20
@@ -63,7 +52,6 @@ function ff_simple_idct_arm, export=1
stmfd sp!, {r4-r11, r14} @ R14 is also called LR
@@ at this point, R0=block, other registers are free.
add r14, r0, #112 @ R14=&block[8*7], better start from the last row, and decrease the value until row=0, i.e. R12=block.
adr r12, __constant_ptr__ @ R12=__constant_ptr__, the vector containing the constants, probably not necessary to reserve a register for it
@@ add 2 temporary variables in the stack: R0 and R14
sub sp, sp, #8 @ allow 2 local variables
str r0, [sp, #0] @ save block in sp[0]
@@ -109,13 +97,13 @@ __b_evaluation:
@@ MAC16(b1, -W7, row[3]);
@@ MAC16(b2, -W1, row[3]);
@@ MAC16(b3, -W5, row[3]);
ldr r8, [r12, #offW1] @ R8=W1
ldr r8, =W1 @ R8=W1
mov r2, r2, asr #16 @ R2=ROWr16[3]
mul r0, r8, r7 @ R0=W1*ROWr16[1]=b0 (ROWr16[1] must be the second arg, to have the possibility to save 1 cycle)
ldr r9, [r12, #offW3] @ R9=W3
ldr r10, [r12, #offW5] @ R10=W5
ldr r9, =W3 @ R9=W3
ldr r10, =W5 @ R10=W5
mul r1, r9, r7 @ R1=W3*ROWr16[1]=b1 (ROWr16[1] must be the second arg, to have the possibility to save 1 cycle)
ldr r11, [r12, #offW7] @ R11=W7
ldr r11, =W7 @ R11=W7
mul r5, r10, r7 @ R5=W5*ROWr16[1]=b2 (ROWr16[1] must be the second arg, to have the possibility to save 1 cycle)
mul r7, r11, r7 @ R7=W7*ROWr16[1]=b3 (ROWr16[1] must be the second arg, to have the possibility to save 1 cycle)
teq r2, #0 @ if null avoid muls
@@ -177,14 +165,14 @@ __a_evaluation:
@@ a2 = a0 - W6 * row[2];
@@ a3 = a0 - W2 * row[2];
@@ a0 = a0 + W2 * row[2];
ldr r9, [r12, #offW4] @ R9=W4
ldr r9, =W4 @ R9=W4
mul r6, r9, r6 @ R6=W4*ROWr16[0]
ldr r10, [r12, #offW6] @ R10=W6
ldr r10, =W6 @ R10=W6
ldrsh r4, [r14, #4] @ R4=ROWr16[2] (a3 not defined yet)
add r6, r6, #ROW_SHIFTED_1 @ R6=W4*ROWr16[0] + 1<<(ROW_SHIFT-1) (a0)

mul r11, r10, r4 @ R11=W6*ROWr16[2]
ldr r8, [r12, #offW2] @ R8=W2
ldr r8, =W2 @ R8=W2
sub r3, r6, r11 @ R3=a0-W6*ROWr16[2] (a2)
@@ temp = ((uint32_t*)row)[2] | ((uint32_t*)row)[3];
@@ if (temp != 0) {}
@@ -248,7 +236,7 @@ __end_a_evaluation:
add r9, r2, r1 @ R9=a1+b1
@@ put 2 16 bits half-words in a 32bits word
@@ ROWr32[0]=ROWr16[0] | (ROWr16[1]<<16) (only Little Endian compliant then!!!)
ldr r10, [r12, #offMASK_MSHW] @ R10=0xFFFF0000
ldr r10, =MASK_MSHW @ R10=0xFFFF0000
and r9, r10, r9, lsl #ROW_SHIFT2MSHW @ R9=0xFFFF0000 & ((a1+b1)<<5)
mvn r11, r10 @ R11= NOT R10= 0x0000FFFF
and r8, r11, r8, asr #ROW_SHIFT @ R8=0x0000FFFF & ((a0+b0)>>11)
@@ -319,13 +307,13 @@ __b_evaluation2:
@@ MAC16(b1, -W7, col[8x3]);
@@ MAC16(b2, -W1, col[8x3]);
@@ MAC16(b3, -W5, col[8x3]);
ldr r8, [r12, #offW1] @ R8=W1
ldr r8, =W1 @ R8=W1
ldrsh r7, [r14, #16]
mul r0, r8, r7 @ R0=W1*ROWr16[1]=b0 (ROWr16[1] must be the second arg, to have the possibility to save 1 cycle)
ldr r9, [r12, #offW3] @ R9=W3
ldr r10, [r12, #offW5] @ R10=W5
ldr r9, =W3 @ R9=W3
ldr r10, =W5 @ R10=W5
mul r1, r9, r7 @ R1=W3*ROWr16[1]=b1 (ROWr16[1] must be the second arg, to have the possibility to save 1 cycle)
ldr r11, [r12, #offW7] @ R11=W7
ldr r11, =W7 @ R11=W7
mul r5, r10, r7 @ R5=W5*ROWr16[1]=b2 (ROWr16[1] must be the second arg, to have the possibility to save 1 cycle)
ldrsh r2, [r14, #48]
mul r7, r11, r7 @ R7=W7*ROWr16[1]=b3 (ROWr16[1] must be the second arg, to have the possibility to save 1 cycle)
@@ -381,13 +369,13 @@ __a_evaluation2:
@@ a3 = a0 - W2 * row[2];
@@ a0 = a0 + W2 * row[2];
ldrsh r6, [r14, #0]
ldr r9, [r12, #offW4] @ R9=W4
ldr r9, =W4 @ R9=W4
mul r6, r9, r6 @ R6=W4*ROWr16[0]
ldr r10, [r12, #offW6] @ R10=W6
ldr r10, =W6 @ R10=W6
ldrsh r4, [r14, #32] @ R4=ROWr16[2] (a3 not defined yet)
add r6, r6, #COL_SHIFTED_1 @ R6=W4*ROWr16[0] + 1<<(COL_SHIFT-1) (a0)
mul r11, r10, r4 @ R11=W6*ROWr16[2]
ldr r8, [r12, #offW2] @ R8=W2
ldr r8, =W2 @ R8=W2
add r2, r6, r11 @ R2=a0+W6*ROWr16[2] (a1)
sub r3, r6, r11 @ R3=a0-W6*ROWr16[2] (a2)
mul r11, r8, r4 @ R11=W2*ROWr16[2]
@@ -489,15 +477,3 @@ __end_bef_a_evaluation:
sub r4, r6, r11 @ R4=a0-W2*ROWr16[2] (a3)
add r6, r6, r11 @ R6=a0+W2*ROWr16[2] (a0)
bal __end_a_evaluation


.align
__constant_ptr__: @@ see #defines at the beginning of the source code for values.
.word W1
.word W2
.word W3
.word W4
.word W5
.word W6
.word W7
.word MASK_MSHW

+ 7
- 13
libavcodec/arm/simple_idct_armv5te.S View File

@@ -37,12 +37,6 @@
#define W26 (W2 | (W6 << 16))
#define W57 (W5 | (W7 << 16))

.text
.align
w13: .long W13
w26: .long W26
w57: .long W57

function idct_row_armv5te
str lr, [sp, #-4]!

@@ -58,7 +52,7 @@ function idct_row_armv5te
mov ip, #16384
sub ip, ip, #1 /* ip = W4 */
smlabb v1, ip, a3, v1 /* v1 = W4*row[0]+(1<<(RS-1)) */
ldr ip, w26 /* ip = W2 | (W6 << 16) */
ldr ip, =W26 /* ip = W2 | (W6 << 16) */
smultb a2, ip, a4
smulbb lr, ip, a4
add v2, v1, a2
@@ -66,8 +60,8 @@ function idct_row_armv5te
sub v4, v1, lr
add v1, v1, lr

ldr ip, w13 /* ip = W1 | (W3 << 16) */
ldr lr, w57 /* lr = W5 | (W7 << 16) */
ldr ip, =W13 /* ip = W1 | (W3 << 16) */
ldr lr, =W57 /* lr = W5 | (W7 << 16) */
smulbt v5, ip, a3
smultt v6, lr, a4
smlatt v5, ip, a4, v5
@@ -94,7 +88,7 @@ function idct_row_armv5te
smlatt v7, ip, a4, v7
sub fp, fp, a2

ldr ip, w26 /* ip = W2 | (W6 << 16) */
ldr ip, =W26 /* ip = W2 | (W6 << 16) */
mov a2, #16384
sub a2, a2, #1 /* a2 = W4 */
smulbb a2, a2, a3 /* a2 = W4*row[4] */
@@ -178,7 +172,7 @@ endfunc
sub v4, v2, a3
sub v6, v2, a3
add fp, v2, a3
ldr ip, w26
ldr ip, =W26
ldr a4, [a1, #(16*2)]
add v2, v2, a3

@@ -211,9 +205,9 @@ endfunc

stmfd sp!, {v1, v2, v3, v4, v5, v6, v7, fp}

ldr ip, w13
ldr ip, =W13
ldr a4, [a1, #(16*1)]
ldr lr, w57
ldr lr, =W57
smulbb v1, ip, a4
smultb v3, ip, a4
smulbb v5, lr, a4


+ 12
- 21
libavcodec/arm/simple_idct_armv6.S View File

@@ -40,15 +40,6 @@
#define W46 (W4 | (W6 << 16))
#define W57 (W5 | (W7 << 16))

.text
.align
w13: .long W13
w26: .long W26
w42: .long W42
w42n: .long W42n
w46: .long W46
w57: .long W57

/*
Compute partial IDCT of single row.
shift = left-shift amount
@@ -60,12 +51,12 @@ w57: .long W57
Output in registers r4--r11
*/
.macro idct_row shift
ldr lr, w46 /* lr = W4 | (W6 << 16) */
ldr lr, =W46 /* lr = W4 | (W6 << 16) */
mov r1, #(1<<(\shift-1))
smlad r4, r2, ip, r1
smlsd r7, r2, ip, r1
ldr ip, w13 /* ip = W1 | (W3 << 16) */
ldr r10,w57 /* r10 = W5 | (W7 << 16) */
ldr ip, =W13 /* ip = W1 | (W3 << 16) */
ldr r10,=W57 /* r10 = W5 | (W7 << 16) */
smlad r5, r2, lr, r1
smlsd r6, r2, lr, r1

@@ -78,11 +69,11 @@ w57: .long W57
smlad r8, lr, r10,r8 /* B0 += W5*row[5] + W7*row[7] */
smusdx r10,r3, r1 /* r10 = B2 = W5*row[1] - W1*row[3] */

ldr r3, w42n /* r3 = -W4 | (-W2 << 16) */
ldr r3, =W42n /* r3 = -W4 | (-W2 << 16) */
smlad r10,lr, r2, r10 /* B2 += W7*row[5] + W3*row[7] */
ldr r2, [r0, #4] /* r2 = row[6,4] */
smlsdx r11,lr, ip, r11 /* B3 += W3*row[5] - W1*row[7] */
ldr ip, w46 /* ip = W4 | (W6 << 16) */
ldr ip, =W46 /* ip = W4 | (W6 << 16) */
smlad r9, lr, r1, r9 /* B1 -= W1*row[5] + W5*row[7] */

smlad r5, r2, r3, r5 /* A1 += -W4*row[4] - W2*row[6] */
@@ -101,12 +92,12 @@ w57: .long W57
Output in registers r4--r11
*/
.macro idct_row4 shift
ldr lr, w46 /* lr = W4 | (W6 << 16) */
ldr r10,w57 /* r10 = W5 | (W7 << 16) */
ldr lr, =W46 /* lr = W4 | (W6 << 16) */
ldr r10,=W57 /* r10 = W5 | (W7 << 16) */
mov r1, #(1<<(\shift-1))
smlad r4, r2, ip, r1
smlsd r7, r2, ip, r1
ldr ip, w13 /* ip = W1 | (W3 << 16) */
ldr ip, =W13 /* ip = W1 | (W3 << 16) */
smlad r5, r2, lr, r1
smlsd r6, r2, lr, r1
smusdx r11,r3, r10 /* r11 = B3 = W7*row[1] - W5*row[3] */
@@ -205,7 +196,7 @@ function idct_row_armv6
cmpeq lr, r2, lsr #16
beq 1f
push {r1}
ldr ip, w42 /* ip = W4 | (W2 << 16) */
ldr ip, =W42 /* ip = W4 | (W2 << 16) */
cmp lr, #0
beq 2f

@@ -249,7 +240,7 @@ function idct_col_armv6
push {r1, lr}

ldr r2, [r0] /* r2 = row[2,0] */
ldr ip, w42 /* ip = W4 | (W2 << 16) */
ldr ip, =W42 /* ip = W4 | (W2 << 16) */
ldr r3, [r0, #8] /* r3 = row[3,1] */
idct_row COL_SHIFT
pop {r1}
@@ -277,7 +268,7 @@ function idct_col_put_armv6
push {r1, r2, lr}

ldr r2, [r0] /* r2 = row[2,0] */
ldr ip, w42 /* ip = W4 | (W2 << 16) */
ldr ip, =W42 /* ip = W4 | (W2 << 16) */
ldr r3, [r0, #8] /* r3 = row[3,1] */
idct_row COL_SHIFT
pop {r1, r2}
@@ -307,7 +298,7 @@ function idct_col_add_armv6
push {r1, r2, lr}

ldr r2, [r0] /* r2 = row[2,0] */
ldr ip, w42 /* ip = W4 | (W2 << 16) */
ldr ip, =W42 /* ip = W4 | (W2 << 16) */
ldr r3, [r0, #8] /* r3 = row[3,1] */
idct_row COL_SHIFT
pop {r1, r2}


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