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>

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 000000000000..6a800c6a4904
--- /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