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authorLinus Torvalds <torvalds@linux-foundation.org>2008-12-28 11:39:19 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2008-12-28 11:39:19 -0800
commit81d6e59dabb1ae0c782e9eb7e3d88f699d25b314 (patch)
tree532afd14c119f1c95206ef0d23db9c4c26a0aa34 /arch/sh/lib64/sdivsi3.S
parent4a6908a3a050aacc9c3a2f36b276b46c0629ad91 (diff)
parent59de580af1c2fd671b0cb27c41ff958859ae5288 (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6: (132 commits) sh: oprofile: Fix up the module build. sh: add UIO support for JPU on SH7722. serial: sh-sci: Fix up port pinmux for SH7366. sh: mach-rsk: Use uImage generation by default for rsk7201/7203. sh: mach-sh03: Fix up pata_platform build breakage. sh: enable deferred io LCDC on Migo-R video: sh_mobile_lcdcfb deferred io support video: deferred io with physically contiguous memory video: deferred io cleanup video: fix deferred io fsync() sh: add LCDC interrupt configuration to AP325 and Migo-R sh_mobile_lcdc: use FB_SYS helpers instead of FB_CFB sh: split coherent pages sh: dma: Kill off ISA DMA wrapper. sh: Conditionalize the code dumper on CONFIG_DUMP_CODE. sh: Kill off the unused SH_ALPHANUMERIC debug option. sh: Enable skipping of bss on debug platforms for sh32 also. doc: Update sh cpufreq documentation. sh: mrshpc_setup_windows() needs to be inline. serial: sh-sci: sci_poll_get_char() is only used by CONFIG_CONSOLE_POLL. ...
Diffstat (limited to 'arch/sh/lib64/sdivsi3.S')
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diff --git a/arch/sh/lib64/sdivsi3.S b/arch/sh/lib64/sdivsi3.S
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+ .global __sdivsi3
+ .section .text..SHmedia32,"ax"
+ .align 2
+
+ /* inputs: r4,r5 */
+ /* clobbered: r1,r18,r19,r20,r21,r25,tr0 */
+ /* result in r0 */
+__sdivsi3:
+ ptb __div_table,tr0
+
+ nsb r5, r1
+ shlld r5, r1, r25 /* normalize; [-2 ..1, 1..2) in s2.62 */
+ shari r25, 58, r21 /* extract 5(6) bit index (s2.4 with hole -1..1) */
+ /* bubble */
+ gettr tr0,r20
+ ldx.ub r20, r21, r19 /* u0.8 */
+ shari r25, 32, r25 /* normalize to s2.30 */
+ shlli r21, 1, r21
+ muls.l r25, r19, r19 /* s2.38 */
+ ldx.w r20, r21, r21 /* s2.14 */
+ ptabs r18, tr0
+ shari r19, 24, r19 /* truncate to s2.14 */
+ sub r21, r19, r19 /* some 11 bit inverse in s1.14 */
+ muls.l r19, r19, r21 /* u0.28 */
+ sub r63, r1, r1
+ addi r1, 92, r1
+ muls.l r25, r21, r18 /* s2.58 */
+ shlli r19, 45, r19 /* multiply by two and convert to s2.58 */
+ /* bubble */
+ sub r19, r18, r18
+ shari r18, 28, r18 /* some 22 bit inverse in s1.30 */
+ muls.l r18, r25, r0 /* s2.60 */
+ muls.l r18, r4, r25 /* s32.30 */
+ /* bubble */
+ shari r0, 16, r19 /* s-16.44 */
+ muls.l r19, r18, r19 /* s-16.74 */
+ shari r25, 63, r0
+ shari r4, 14, r18 /* s19.-14 */
+ shari r19, 30, r19 /* s-16.44 */
+ muls.l r19, r18, r19 /* s15.30 */
+ xor r21, r0, r21 /* You could also use the constant 1 << 27. */
+ add r21, r25, r21
+ sub r21, r19, r21
+ shard r21, r1, r21
+ sub r21, r0, r0
+ blink tr0, r63
+
+/* This table has been generated by divtab.c .
+Defects for bias -330:
+ Max defect: 6.081536e-07 at -1.000000e+00
+ Min defect: 2.849516e-08 at 1.030651e+00
+ Max 2nd step defect: 9.606539e-12 at -1.000000e+00
+ Min 2nd step defect: 0.000000e+00 at 0.000000e+00
+ Defect at 1: 1.238659e-07
+ Defect at -2: 1.061708e-07 */
+
+ .balign 2
+ .type __div_table,@object
+ .size __div_table,128
+/* negative division constants */
+ .word -16638
+ .word -17135
+ .word -17737
+ .word -18433
+ .word -19103
+ .word -19751
+ .word -20583
+ .word -21383
+ .word -22343
+ .word -23353
+ .word -24407
+ .word -25582
+ .word -26863
+ .word -28382
+ .word -29965
+ .word -31800
+/* negative division factors */
+ .byte 66
+ .byte 70
+ .byte 75
+ .byte 81
+ .byte 87
+ .byte 93
+ .byte 101
+ .byte 109
+ .byte 119
+ .byte 130
+ .byte 142
+ .byte 156
+ .byte 172
+ .byte 192
+ .byte 214
+ .byte 241
+ .skip 16
+ .global __div_table
+__div_table:
+ .skip 16
+/* positive division factors */
+ .byte 241
+ .byte 214
+ .byte 192
+ .byte 172
+ .byte 156
+ .byte 142
+ .byte 130
+ .byte 119
+ .byte 109
+ .byte 101
+ .byte 93
+ .byte 87
+ .byte 81
+ .byte 75
+ .byte 70
+ .byte 66
+/* positive division constants */
+ .word 31801
+ .word 29966
+ .word 28383
+ .word 26864
+ .word 25583
+ .word 24408
+ .word 23354
+ .word 22344
+ .word 21384
+ .word 20584
+ .word 19752
+ .word 19104
+ .word 18434
+ .word 17738
+ .word 17136
+ .word 16639