| .global __sdivsi3 |
| .global __sdivsi3_1 |
| .global __sdivsi3_2 |
| .section .text..SHmedia32,"ax" |
| .align 2 |
| |
| /* inputs: r4,r5 */ |
| /* clobbered: r1,r18,r19,r20,r21,r25,tr0 */ |
| /* result in r0 */ |
| __sdivsi3: |
| __sdivsi3_1: |
| ptb __div_table,tr0 |
| gettr tr0,r20 |
| |
| __sdivsi3_2: |
| 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 */ |
| 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 |
