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authorMichael Sevakis <jethead71@rockbox.org>2011-02-22 21:44:15 +0000
committerMichael Sevakis <jethead71@rockbox.org>2011-02-22 21:44:15 +0000
commit652463ecc0085c9e04da17631aa1fdb2703eee80 (patch)
treea05cac6777f599f0e8cabc2306e4f3af69428254 /apps/plugins/mpegplayer/libmpeg2/idct_arm.S
parentec6e64ce9011281e6ecbbc0d93b91ce4db2f42dc (diff)
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mpegplayer: Move libmpeg2 files into their own subdirectory so things are less cluttered.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29381 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'apps/plugins/mpegplayer/libmpeg2/idct_arm.S')
-rw-r--r--apps/plugins/mpegplayer/libmpeg2/idct_arm.S443
1 files changed, 443 insertions, 0 deletions
diff --git a/apps/plugins/mpegplayer/libmpeg2/idct_arm.S b/apps/plugins/mpegplayer/libmpeg2/idct_arm.S
new file mode 100644
index 0000000000..97a87a8b59
--- /dev/null
+++ b/apps/plugins/mpegplayer/libmpeg2/idct_arm.S
@@ -0,0 +1,443 @@
+/***************************************************************************
+ * __________ __ ___.
+ * Open \______ \ ____ ____ | | _\_ |__ _______ ___
+ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
+ * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
+ * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
+ * \/ \/ \/ \/ \/
+ * $Id$
+ *
+ * Copyright (C) 2007 by Michael Sevakis
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#include "config.h"
+
+ .global mpeg2_idct_copy
+ .type mpeg2_idct_copy, %function
+ .global mpeg2_idct_add
+ .type mpeg2_idct_add, %function
+
+
+/* Custom calling convention:
+ * r0 contains block pointer and is non-volatile
+ * all non-volatile c context saved and restored on its behalf
+ */
+.idct:
+ add r12, r0, #128
+1:
+ ldrsh r1, [r0, #0] /* d0 */
+ ldrsh r2, [r0, #2] /* d1 */
+ ldrsh r3, [r0, #4] /* d2 */
+ ldrsh r4, [r0, #6] /* d3 */
+ ldrsh r5, [r0, #8] /* d0 */
+ ldrsh r6, [r0, #10] /* d1 */
+ ldrsh r7, [r0, #12] /* d2 */
+ ldrsh r8, [r0, #14] /* d3 */
+ orrs r9, r2, r3
+ orreqs r9, r4, r5
+ orreqs r9, r6, r7
+ cmpeq r8, #0
+ bne 2f
+ mov r1, r1, asl #15
+ bic r1, r1, #0x8000
+ orr r1, r1, r1, lsr #16
+ str r1, [r0], #4
+ str r1, [r0], #4
+ str r1, [r0], #4
+ str r1, [r0], #4
+ cmp r0, r12
+ blo 1b
+ b 3f
+2:
+ mov r1, r1, asl #11 /* r1 = d0 = (block[0] << 11) + 2048 */
+ add r1, r1, #2048
+ add r1, r1, r3, asl #11 /* r1 = t0 = d0 + (block[2] << 11) */
+ sub r3, r1, r3, asl #12 /* r3 = t1 = d0 - (block[2] << 11) */
+
+ add r9, r2, r4 /* r9 = tmp = (d1+d3)*(1108/4) */
+ add r10, r9, r9, asl #2
+ add r10, r10, r9, asl #4
+ add r9, r10, r9, asl #8
+
+ add r10, r2, r2, asl #4 /* r2 = t2 = tmp + (d1*(1568/32)*8) */
+ add r2, r10, r2, asl #5
+ add r2, r9, r2, asl #3
+
+ add r10, r4, r4, asl #2 /* r4 = t3 = tmp - (d3*(3784/8)*2) */
+ rsb r10, r10, r4, asl #6
+ add r4, r4, r10, asl #3
+ sub r4, r9, r4, asl #1
+ /* t2 & t3 are 1/4 final value here */
+ add r1, r1, r2, asl #2 /* r1 = a0 = t0 + t2 */
+ sub r2, r1, r2, asl #3 /* r2 = a3 = t0 - t2 */
+ add r3, r3, r4, asl #2 /* r3 = a1 = t1 + t3 */
+ sub r4, r3, r4, asl #3 /* r4 = a2 = t1 - t3 */
+
+ add r9, r8, r5 /* r9 = tmp = 565*(d3 + d0) */
+ add r10, r9, r9, asl #4
+ add r10, r10, r10, asl #5
+ add r9, r10, r9, asl #2
+
+ add r10, r5, r5, asl #4 /* r5 = t0 = tmp + (((2276/4)*d0)*4) */
+ add r10, r10, r10, asl #5
+ add r5, r10, r5, asl #3
+ add r5, r9, r5, asl #2
+
+ add r10, r8, r8, asl #2 /* r8 = t1 = tmp - (((3406/2)*d3)*2) */
+ add r10, r10, r10, asl #4
+ add r10, r10, r8, asl #7
+ rsb r8, r8, r10, asl #3
+ sub r8, r9, r8, asl #1
+
+ add r9, r6, r7 /* r9 = tmp = (2408/8)*(d1 + d2) */
+ add r10, r9, r9, asl #3
+ add r10, r10, r10, asl #5
+ add r9, r10, r9, asl #2
+
+ add r10, r7, r7, asl #3 /* r7 = t2 = (tmp*8) - 799*d2 */
+ add r10, r10, r7, asl #4
+ rsb r7, r7, r10, asl #5
+ rsb r7, r7, r9, asl #3
+
+ sub r10, r6, r6, asl #4 /* r6 = t3 = (tmp*8) - 4017*d1 */
+ sub r10, r10, r6, asl #6
+ add r10, r10, r6, asl #12
+ add r6, r10, r6
+ rsb r6, r6, r9, asl #3
+ /* t0 = r5, t1 = r8, t2 = r7, t3 = r6*/
+ add r9, r5, r7 /* r9 = b0 = t0 + t2 */
+ add r10, r8, r6 /* r10 = b3 = t1 + t3 */
+ sub r5, r5, r7 /* t0 -= t2 */
+ sub r8, r8, r6 /* t1 -= t3 */
+ add r6, r5, r8 /* r6 = t0 + t1 */
+ sub r7, r5, r8 /* r7 = t0 - t1 */
+
+ add r11, r6, r6, asr #2 /* r6 = b1 = r6*(181/128) */
+ add r11, r11, r11, asr #5
+ add r6, r11, r6, asr #3
+ add r11, r7, r7, asr #2 /* r7 = b2 = r7*(181/128) */
+ add r11, r11, r11, asr #5
+ add r7, r11, r7, asr #3
+ /* r1 = a0, r3 = a1, r4 = a2, r2 = a3 */
+ /* r9 = b0, r6 = b1*2, r7 = b2*2, r10 = b3 */
+ add r5, r1, r9 /* block[0] = (a0 + b0) >> 12 */
+ mov r5, r5, asr #12
+ strh r5, [r0], #2
+ add r8, r3, r6, asr #1 /* block[1] = (a1 + b1) >> 12 */
+ mov r8, r8, asr #12
+ strh r8, [r0], #2
+ add r5, r4, r7, asr #1 /* block[2] = (a2 + b2) >> 12 */
+ mov r5, r5, asr #12
+ strh r5, [r0], #2
+ add r8, r2, r10 /* block[3] = (a3 + b3) >> 12 */
+ mov r8, r8, asr #12
+ strh r8, [r0], #2
+ sub r5, r2, r10 /* block[4] = (a3 - b3) >> 12 */
+ mov r5, r5, asr #12
+ strh r5, [r0], #2
+ sub r8, r4, r7, asr #1 /* block[5] = (a2 - b2) >> 12 */
+ mov r8, r8, asr #12
+ strh r8, [r0], #2
+ sub r5, r3, r6, asr #1 /* block[6] = (a1 - b1) >> 12 */
+ mov r5, r5, asr #12
+ strh r5, [r0], #2
+ sub r8, r1, r9 /* block[7] = (a0 - b0) >> 12 */
+ mov r8, r8, asr #12
+ strh r8, [r0], #2
+ cmp r0, r12
+ blo 1b
+3:
+ sub r0, r0, #128
+ add r12, r0, #16
+4:
+ ldrsh r1, [r0, #0*8] /* d0 */
+ ldrsh r2, [r0, #2*8] /* d1 */
+ ldrsh r3, [r0, #4*8] /* d2 */
+ ldrsh r4, [r0, #6*8] /* d3 */
+ ldrsh r5, [r0, #8*8] /* d0 */
+ ldrsh r6, [r0, #10*8] /* d1 */
+ ldrsh r7, [r0, #12*8] /* d2 */
+ ldrsh r8, [r0, #14*8] /* d3 */
+
+ mov r1, r1, asl #11 /* r1 = d0 = (block[0] << 11) + 2048 */
+ add r1, r1, #65536
+ add r1, r1, r3, asl #11 /* r1 = t0 = d0 + d2:(block[2] << 11) */
+ sub r3, r1, r3, asl #12 /* r3 = t1 = d0 - d2:(block[2] << 11) */
+
+ add r9, r2, r4 /* r9 = tmp = (d1+d3)*(1108/4) */
+ add r10, r9, r9, asl #2
+ add r10, r10, r9, asl #4
+ add r9, r10, r9, asl #8
+
+ add r11, r2, r2, asl #4 /* r2 = t2 = tmp + (d1*(1568/32)*8) */
+ add r2, r11, r2, asl #5
+ add r2, r9, r2, asl #3
+
+ add r10, r4, r4, asl #2 /* r4 = t3 = tmp - (d3*(3784/8)*2) */
+ rsb r10, r10, r4, asl #6
+ add r4, r4, r10, asl #3
+ sub r4, r9, r4, asl #1
+ /* t2 & t3 are 1/4 final value here */
+ add r1, r1, r2, asl #2 /* r1 = a0 = t0 + t2 */
+ sub r2, r1, r2, asl #3 /* r2 = a3 = t0 - t2 */
+ add r3, r3, r4, asl #2 /* r3 = a1 = t1 + t3 */
+ sub r4, r3, r4, asl #3 /* r4 = a2 = t1 - t3 */
+
+ add r9, r8, r5 /* r9 = tmp = 565*(d3 + d0) */
+ add r10, r9, r9, asl #4
+ add r10, r10, r10, asl #5
+ add r9, r10, r9, asl #2
+
+ add r10, r5, r5, asl #4 /* r5 = t0 = tmp + (((2276/4)*d0)*4) */
+ add r10, r10, r10, asl #5
+ add r5, r10, r5, asl #3
+ add r5, r9, r5, asl #2
+
+ add r10, r8, r8, asl #2 /* r8 = t1 = tmp - (((3406/2)*d3)*2) */
+ add r10, r10, r10, asl #4
+ add r10, r10, r8, asl #7
+ rsb r8, r8, r10, asl #3
+ sub r8, r9, r8, asl #1
+
+ add r9, r6, r7 /* r9 = tmp = (2408/8)*(d1 + d2) */
+ add r10, r9, r9, asl #3
+ add r10, r10, r10, asl #5
+ add r9, r10, r9, asl #2
+
+ add r10, r7, r7, asl #3 /* r7 = t2 = (tmp*8) - 799*d2 */
+ add r10, r10, r7, asl #4
+ rsb r7, r7, r10, asl #5
+ rsb r7, r7, r9, asl #3
+
+ sub r10, r6, r6, asl #4 /* r6 = t3 = (tmp*8) - 4017*d1 */
+ sub r10, r10, r6, asl #6
+ add r10, r10, r6, asl #12
+ add r6, r10, r6
+ rsb r6, r6, r9, asl #3
+ /* t0=r5, t1=r8, t2=r7, t3=r6*/
+ add r9, r5, r7 /* r9 = b0 = t0 + t2 */
+ add r10, r8, r6 /* r10 = b3 = t1 + t3 */
+ sub r5, r5, r7 /* t0 -= t2 */
+ sub r8, r8, r6 /* t1 -= t3 */
+ add r6, r5, r8 /* r6 = t0 + t1 */
+ sub r7, r5, r8 /* r7 = t0 - t1 */
+
+ add r11, r6, r6, asr #2 /* r6 = b1 = r5*(181/128) */
+ add r11, r11, r11, asr #5
+ add r6, r11, r6, asr #3
+ add r11, r7, r7, asr #2 /* r7 = b2 = r6*(181/128) */
+ add r11, r11, r11, asr #5
+ add r7, r11, r7, asr #3
+ /* r1 = a0, r3 = a1, r4 = a2, r2 = a3 */
+ /* r9 = b0, r6 = b1*2, r7 = b2*2, r10 = b3 */
+ add r5, r1, r9 /* block[0] = (a0 + b0) >> 17 */
+ mov r5, r5, asr #17
+ strh r5, [r0, #0*8]
+ add r8, r3, r6, asr #1 /* block[1] = (a1 + b1) >> 17 */
+ mov r8, r8, asr #17
+ strh r8, [r0, #2*8]
+ add r5, r4, r7, asr #1 /* block[2] = (a2 + b2) >> 17 */
+ mov r5, r5, asr #17
+ strh r5, [r0, #4*8]
+ add r8, r2, r10 /* block[3] = (a3 + b3) >> 17 */
+ mov r8, r8, asr #17
+ strh r8, [r0, #6*8]
+ sub r5, r2, r10 /* block[4] = (a3 - b3) >> 17 */
+ mov r5, r5, asr #17
+ strh r5, [r0, #8*8]
+ sub r8, r4, r7, asr #1 /* block[5] = (a2 - b2) >> 17 */
+ mov r8, r8, asr #17
+ strh r8, [r0, #10*8]
+ sub r5, r3, r6, asr #1 /* block[6] = (a1 - b1) >> 17 */
+ mov r5, r5, asr #17
+ strh r5, [r0, #12*8]
+ sub r8, r1, r9 /* block[7] = (a0 - b0) >> 17 */
+ mov r8, r8, asr #17
+ strh r8, [r0, #14*8]
+ add r0, r0, #2
+ cmp r0, r12
+ blo 4b
+ sub r0, r0, #16
+ bx lr
+
+mpeg2_idct_copy:
+ stmfd sp!, { r1-r2, r4-r11, lr }
+ bl .idct
+ ldmfd sp!, { r1-r2 }
+ mov r11, #0
+ add r12, r0, #128
+1:
+ ldrsh r3, [r0, #0]
+ ldrsh r4, [r0, #2]
+ ldrsh r5, [r0, #4]
+ ldrsh r6, [r0, #6]
+ ldrsh r7, [r0, #8]
+ ldrsh r8, [r0, #10]
+ ldrsh r9, [r0, #12]
+ ldrsh r10, [r0, #14]
+ cmp r3, #255
+ mvnhi r3, r3, asr #31
+ strb r3, [r1, #0]
+ str r11, [r0], #4
+ cmp r4, #255
+ mvnhi r4, r4, asr #31
+ strb r4, [r1, #1]
+ cmp r5, #255
+ mvnhi r5, r5, asr #31
+ strb r5, [r1, #2]
+ str r11, [r0], #4
+ cmp r6, #255
+ mvnhi r6, r6, asr #31
+ strb r6, [r1, #3]
+ cmp r7, #255
+ mvnhi r7, r7, asr #31
+ strb r7, [r1, #4]
+ str r11, [r0], #4
+ cmp r8, #255
+ mvnhi r8, r8, asr #31
+ strb r8, [r1, #5]
+ cmp r9, #255
+ mvnhi r9, r9, asr #31
+ strb r9, [r1, #6]
+ str r11, [r0], #4
+ cmp r10, #255
+ mvnhi r10, r10, asr #31
+ strb r10, [r1, #7]
+ add r1, r1, r2
+ cmp r0, r12
+ blo 1b
+ ldmpc regs=r4-r11
+
+mpeg2_idct_add:
+ cmp r0, #129
+ mov r0, r1
+ ldreqsh r1, [r0, #0]
+ bne 1f
+ and r1, r1, #0x70
+ cmp r1, #0x40
+ bne 3f
+1:
+ stmfd sp!, { r2-r11, lr }
+ bl .idct
+ ldmfd sp!, { r1-r2 }
+ mov r11, #0
+ add r12, r0, #128
+2:
+ ldrb r3, [r1, #0]
+ ldrb r4, [r1, #1]
+ ldrb r5, [r1, #2]
+ ldrb r6, [r1, #3]
+ ldrsh r7, [r0, #0]
+ ldrsh r8, [r0, #2]
+ ldrsh r9, [r0, #4]
+ ldrsh r10, [r0, #6]
+ add r7, r7, r3
+ ldrb r3, [r1, #4]
+ cmp r7, #255
+ mvnhi r7, r7, asr #31
+ strb r7, [r1, #0]
+ ldrsh r7, [r0, #8]
+ add r8, r8, r4
+ ldrb r4, [r1, #5]
+ cmp r8, #255
+ mvnhi r8, r8, asr #31
+ strb r8, [r1, #1]
+ ldrsh r8, [r0, #10]
+ add r9, r9, r5
+ ldrb r5, [r1, #6]
+ cmp r9, #255
+ mvnhi r9, r9, asr #31
+ strb r9, [r1, #2]
+ ldrsh r9, [r0, #12]
+ add r10, r10, r6
+ ldrb r6, [r1, #7]
+ cmp r10, #255
+ mvnhi r10, r10, asr #31
+ strb r10, [r1, #3]
+ ldrsh r10, [r0, #14]
+ str r11, [r0], #4
+ add r7, r7, r3
+ cmp r7, #255
+ mvnhi r7, r7, asr #31
+ strb r7, [r1, #4]
+ str r11, [r0], #4
+ add r8, r8, r4
+ cmp r8, #255
+ mvnhi r8, r8, asr #31
+ strb r8, [r1, #5]
+ str r11, [r0], #4
+ add r9, r9, r5
+ cmp r9, #255
+ mvnhi r9, r9, asr #31
+ strb r9, [r1, #6]
+ add r10, r10, r6
+ cmp r10, #255
+ mvnhi r10, r10, asr #31
+ strb r10, [r1, #7]
+ str r11, [r0], #4
+ add r1, r1, r2
+ cmp r0, r12
+ blo 2b
+ ldmpc regs=r4-r11
+3:
+ stmfd sp!, { r4-r5, lr }
+ ldrsh r1, [r0, #0] /* r1 = block[0] */
+ mov r4, #0
+ strh r4, [r0, #0] /* block[0] = 0 */
+ strh r4, [r0, #126] /* block[63] = 0 */
+ add r1, r1, #64 /* r1 = DC << 7 */
+ add r0, r2, r3, asl #3
+4:
+ ldrb r4, [r2, #0]
+ ldrb r5, [r2, #1]
+ ldrb r12, [r2, #2]
+ ldrb lr, [r2, #3]
+ add r4, r4, r1, asr #7
+ cmp r4, #255
+ mvnhi r4, r4, asr #31
+ strb r4, [r2, #0]
+ add r5, r5, r1, asr #7
+ cmp r5, #255
+ mvnhi r5, r5, asr #31
+ strb r5, [r2, #1]
+ add r12, r12, r1, asr #7
+ cmp r12, #255
+ mvnhi r12, r12, asr #31
+ strb r12, [r2, #2]
+ add lr, lr, r1, asr #7
+ cmp lr, #255
+ mvnhi lr, lr, asr #31
+ strb lr, [r2, #3]
+ ldrb r4, [r2, #4]
+ ldrb r5, [r2, #5]
+ ldrb r12, [r2, #6]
+ ldrb lr, [r2, #7]
+ add r4, r4, r1, asr #7
+ cmp r4, #255
+ mvnhi r4, r4, asr #31
+ strb r4, [r2, #4]
+ add r5, r5, r1, asr #7
+ cmp r5, #255
+ mvnhi r5, r5, asr #31
+ strb r5, [r2, #5]
+ add r12, r12, r1, asr #7
+ cmp r12, #255
+ mvnhi r12, r12, asr #31
+ strb r12, [r2, #6]
+ add lr, lr, r1, asr #7
+ cmp lr, #255
+ mvnhi lr, lr, asr #31
+ strb lr, [r2, #7]
+ add r2, r2, r3
+ cmp r2, r0
+ blo 4b
+ ldmpc regs=r4-r5