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Diffstat (limited to 'libavcodec/armv4l/simple_idct_armv6.S')
-rw-r--r--libavcodec/armv4l/simple_idct_armv6.S144
1 files changed, 104 insertions, 40 deletions
diff --git a/libavcodec/armv4l/simple_idct_armv6.S b/libavcodec/armv4l/simple_idct_armv6.S
index 401e1910df..328e0a9147 100644
--- a/libavcodec/armv4l/simple_idct_armv6.S
+++ b/libavcodec/armv4l/simple_idct_armv6.S
@@ -47,6 +47,19 @@ w42n: .long W42n
w46: .long W46
w57: .long W57
+ .macro idct_row_start shift
+ ldr ip, [pc, #(w42-.-8)] /* ip = W4 | (W2 << 16) */
+ ldr lr, [pc, #(w46-.-8)] /* lr = W4 | (W6 << 16) */
+ ldr v7, [pc, #(w57-.-8)] /* v7 = W5 | (W7 << 16) */
+ mov a2, #(1<<(\shift-1))
+ smlad v1, a3, ip, a2
+ smlsd v4, a3, ip, a2
+ ldr ip, [pc, #(w13-.-8)] /* ip = W1 | (W3 << 16) */
+ smlad v2, a3, lr, a2
+ smlsd v3, a3, lr, a2
+ smusdx fp, a4, v7 /* fp = B3 = W7*row[1] - W5*row[3] */
+ smuad v5, a4, ip /* v5 = B0 = W1*row[1] + W3*row[3] */
+ .endm
/*
Compute partial IDCT of single row.
shift = left-shift amount
@@ -58,17 +71,6 @@ w57: .long W57
Output in registers v1--v8
*/
.macro idct_row shift
- ldr lr, [pc, #(w46-.-8)] /* lr = W4 | (W6 << 16) */
- mov a2, #(1<<(\shift-1))
- smlad v1, a3, ip, a2
- smlsd v4, a3, ip, a2
- ldr ip, [pc, #(w13-.-8)] /* ip = W1 | (W3 << 16) */
- ldr v7, [pc, #(w57-.-8)] /* v7 = W5 | (W7 << 16) */
- smlad v2, a3, lr, a2
- smlsd v3, a3, lr, a2
-
- smuad v5, a4, ip /* v5 = B0 = W1*row[1] + W3*row[3] */
- smusdx fp, a4, v7 /* fp = B3 = W7*row[1] - W5*row[3] */
ldr lr, [a1, #12] /* lr = row[7,5] */
pkhtb a3, ip, v7, asr #16 /* a4 = W7 | (W3 << 16) */
pkhbt a2, ip, v7, lsl #16 /* a2 = W1 | (W5 << 16) */
@@ -99,16 +101,6 @@ w57: .long W57
Output in registers v1--v8
*/
.macro idct_row4 shift
- ldr lr, [pc, #(w46-.-8)] /* lr = W4 | (W6 << 16) */
- ldr v7, [pc, #(w57-.-8)] /* v7 = W5 | (W7 << 16) */
- mov a2, #(1<<(\shift-1))
- smlad v1, a3, ip, a2
- smlsd v4, a3, ip, a2
- ldr ip, [pc, #(w13-.-8)] /* ip = W1 | (W3 << 16) */
- smlad v2, a3, lr, a2
- smlsd v3, a3, lr, a2
- smusdx fp, a4, v7 /* fp = B3 = W7*row[1] - W5*row[3] */
- smuad v5, a4, ip /* v5 = B0 = W1*row[1] + W3*row[3] */
pkhtb a3, ip, v7, asr #16 /* a4 = W7 | (W3 << 16) */
pkhbt a2, ip, v7, lsl #16 /* a2 = W1 | (W5 << 16) */
smusdx v6, a3, a4 /* v6 = -B1 = W7*row[3] - W3*row[1] */
@@ -193,28 +185,100 @@ w57: .long W57
.align
.func idct_row_armv6
idct_row_armv6:
- str lr, [sp, #-4]!
-
- ldr lr, [a1, #12] /* lr = row[7,5] */
- ldr ip, [a1, #4] /* ip = row[6,4] */
+ ldr fp, [a1, #12] /* fp = row[7,5] */
+ ldr v7, [a1, #4] /* v7 = row[6,4] */
ldr a4, [a1, #8] /* a4 = row[3,1] */
ldr a3, [a1] /* a3 = row[2,0] */
- orrs lr, lr, ip
- cmpeq lr, a4
- cmpeq lr, a3, lsr #16
+ mov ip, #(1<<(ROW_SHIFT-1))
+ orrs v5, fp, v7
+ cmpeq v5, a4
+ cmpeq v5, a3, lsr #16
beq 1f
- str a2, [sp, #-4]!
- ldr ip, [pc, #(w42-.-8)] /* ip = W4 | (W2 << 16) */
- cmp lr, #0
- beq 2f
+ cmp v5, #0
+ stmfd sp!, {a2, lr}
+ ldr v5, [pc, #(w42-.-8)] /* v5 = W4 | (W2 << 16) */
+ ldr v6, [pc, #(w46-.-8)] /* v6 = W4 | (W6 << 16) */
+ ldr v7, [pc, #(w57-.-8)] /* v7 = W5 | (W7 << 16) */
- idct_row ROW_SHIFT
- b 3f
+ smlad v1, a3, v5, ip
+ smlsd v4, a3, v5, ip
+ ldr a2, [pc, #(w13-.-8)] /* a2 = W1 | (W3 << 16) */
+ smlad v2, a3, v6, ip
+ smlsd v3, a3, v6, ip
+ smusdx lr, a4, v7 /* lr = B3 = W7*row[1] - W5*row[3] */
+ smuad v5, a4, a2 /* v5 = B0 = W1*row[1] + W3*row[3] */
-2: idct_row4 ROW_SHIFT
+ pkhtb a3, a2, v7, asr #16 /* a3 = W7 | (W3 << 16) */
+ pkhbt ip, a2, v7, lsl #16 /* ip = W1 | (W5 << 16) */
+ smusdx v6, a3, a4 /* v6 = -B1 = W7*row[3] - W3*row[1] */
+ smusdx a4, a4, ip /* v7 = B2 = W5*row[1] - W1*row[3] */
+ beq 3f
+
+ smlad v5, fp, v7, v5 /* B0 += W5*row[5] + W7*row[7] */
+ smlad v7, fp, a3, a4 /* B2 += W7*row[5] + W3*row[7] */
+ ldr a4, [pc, #(w42n-.-8)] /* a4 = -W4 | (-W2 << 16) */
+ ldr a3, [a1, #4] /* a3 = row[6,4] */
+ smlsdx lr, fp, a2, lr /* B3 += W3*row[5] - W1*row[7] */
+ ldr a2, [pc, #(w46-.-8)] /* a2 = W4 | (W6 << 16) */
+ smlad v6, fp, ip, v6 /* B1 -= W1*row[5] + W5*row[7] */
+
+ smlad v2, a3, a4, v2 /* A1 += -W4*row[4] - W2*row[6] */
+ smlsd v3, a3, a4, v3 /* A2 += -W4*row[4] + W2*row[6] */
+ smlad v1, a3, a2, v1 /* A0 += W4*row[4] + W6*row[6] */
+ smlsd v4, a3, a2, v4 /* A3 += W4*row[4] - W6*row[6] */
+
+ ldr a2, [sp], #4
+ add a4, v1, v5 /* a4 = A0 + B0 */
+ sub a3, v1, v5 /* a3 = A0 - B0 */
+ mov v1, a4, asr #ROW_SHIFT
+ mov v5, a3, asr #ROW_SHIFT
+
+ sub a4, v2, v6 /* a4 = A1 + B1 */
+ add a3, v2, v6 /* a3 = A1 - B1 */
+ mov v2, a4, asr #ROW_SHIFT
+ mov v6, a3, asr #ROW_SHIFT
+
+ add a4, v3, v7 /* a4 = A2 + B2 */
+ sub a3, v3, v7 /* a3 = A2 - B2 */
+ mov v3, a4, asr #ROW_SHIFT
+ mov v7, a3, asr #ROW_SHIFT
+
+ add a4, v4, lr /* a4 = A3 + B3 */
+ sub a3, v4, lr /* a3 = A3 - B3 */
+ mov v4, a4, asr #ROW_SHIFT
+ mov fp, a3, asr #ROW_SHIFT
+
+ strh v1, [a2]
+ strh v2, [a2, #(16*2)]
+ strh v3, [a2, #(16*4)]
+ strh v4, [a2, #(16*6)]
+ strh fp, [a2, #(16*1)]
+ strh v7, [a2, #(16*3)]
+ strh v6, [a2, #(16*5)]
+ strh v5, [a2, #(16*7)]
+
+ ldr pc, [sp], #4
3: ldr a2, [sp], #4
- idct_finish_shift ROW_SHIFT
+ add v7, v1, v5 /* v7 = A0 + B0 */
+ sub a3, v1, v5 /* a3 = A0 - B0 */
+ mov v1, v7, asr #ROW_SHIFT
+ mov v5, a3, asr #ROW_SHIFT
+
+ sub v7, v2, v6 /* v7 = A1 + B1 */
+ add a3, v2, v6 /* a3 = A1 - B1 */
+ mov v2, v7, asr #ROW_SHIFT
+ mov v6, a3, asr #ROW_SHIFT
+
+ add v7, v3, a4 /* v7 = A2 + B2 */
+ sub a3, v3, a4 /* a3 = A2 - B2 */
+ mov v3, v7, asr #ROW_SHIFT
+ mov v7, a3, asr #ROW_SHIFT
+
+ add a4, v4, lr /* xx = A3 + B3 */
+ sub a3, v4, lr /* a3 = A3 - B3 */
+ mov v4, a4, asr #ROW_SHIFT
+ mov fp, a3, asr #ROW_SHIFT
strh v1, [a2]
strh v2, [a2, #(16*2)]
@@ -236,7 +300,7 @@ idct_row_armv6:
strh a3, [a2, #(16*3)]
strh a3, [a2, #(16*5)]
strh a3, [a2, #(16*7)]
- ldr pc, [sp], #4
+ mov pc, lr
.endfunc
/*
@@ -250,8 +314,8 @@ idct_col_armv6:
stmfd sp!, {a2, lr}
ldr a3, [a1] /* a3 = row[2,0] */
- ldr ip, [pc, #(w42-.-8)] /* ip = W4 | (W2 << 16) */
ldr a4, [a1, #8] /* a4 = row[3,1] */
+ idct_row_start COL_SHIFT
idct_row COL_SHIFT
ldr a2, [sp], #4
idct_finish_shift COL_SHIFT
@@ -280,8 +344,8 @@ idct_col_put_armv6:
stmfd sp!, {a2, a3, lr}
ldr a3, [a1] /* a3 = row[2,0] */
- ldr ip, [pc, #(w42-.-8)] /* ip = W4 | (W2 << 16) */
ldr a4, [a1, #8] /* a4 = row[3,1] */
+ idct_row_start COL_SHIFT
idct_row COL_SHIFT
ldmfd sp!, {a2, a3}
idct_finish_shift_sat COL_SHIFT
@@ -312,8 +376,8 @@ idct_col_add_armv6:
stmfd sp!, {a2, a3, lr}
ldr a3, [a1] /* a3 = row[2,0] */
- ldr ip, [pc, #(w42-.-8)] /* ip = W4 | (W2 << 16) */
ldr a4, [a1, #8] /* a4 = row[3,1] */
+ idct_row_start COL_SHIFT
idct_row COL_SHIFT
ldmfd sp!, {a2, a3}
idct_finish
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-15 02:16:05 +0000