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author | Paul Mundt <lethal@linux-sh.org> | 2008-12-12 07:53:14 (GMT) |
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committer | Paul Mundt <lethal@linux-sh.org> | 2008-12-22 09:44:05 (GMT) |
commit | 180ae2037f5bc33b0597ddbb76d36b08a74a238a (patch) | |
tree | 623c8e77a7593811124726e669e701443b83e47e /arch/sh/lib64/sdivsi3.S | |
parent | 209aa4fdc39eacc145a7f9c32a4b9ffcc68912c6 (diff) | |
download | linux-fsl-qoriq-180ae2037f5bc33b0597ddbb76d36b08a74a238a.tar.xz |
sh: Provide sdivsi3/udivsi3/udivdi3 for sh64, kill off libgcc linking.
This moves in the necessary libgcc bits and kills off the libgcc linking
for sh64 kernels as well.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/lib64/sdivsi3.S')
-rw-r--r-- | arch/sh/lib64/sdivsi3.S | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/arch/sh/lib64/sdivsi3.S b/arch/sh/lib64/sdivsi3.S new file mode 100644 index 0000000..6a800c6 --- /dev/null +++ b/arch/sh/lib64/sdivsi3.S @@ -0,0 +1,131 @@ + .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 |