| // Copyright 2009 The Go Authors. All rights reserved. | |
| // Use of this source code is governed by a BSD-style | |
| // license that can be found in the LICENSE file. | |
| TEXT ·IndexByte(SB),7,$0 | |
| MOVW base+0(FP), R0 | |
| MOVW len+4(FP), R1 | |
| MOVBU c+12(FP), R2 // byte to find | |
| MOVW R0, R4 // store base for later | |
| ADD R0, R1 // end | |
| _loop: | |
| CMP R0, R1 | |
| B.EQ _notfound | |
| MOVBU.P 1(R0), R3 | |
| CMP R2, R3 | |
| B.NE _loop | |
| SUB $1, R0 // R0 will be one beyond the position we want | |
| SUB R4, R0 // remove base | |
| MOVW R0, index+16(FP) | |
| RET | |
| _notfound: | |
| MOVW $-1, R0 | |
| MOVW R0, index+16(FP) | |
| RET | |
| TEXT ·Equal(SB),7,$0 | |
| MOVW alen+4(FP), R1 | |
| MOVW blen+16(FP), R3 | |
| CMP R1, R3 // unequal lengths are not equal | |
| B.NE _notequal | |
| MOVW aptr+0(FP), R0 | |
| MOVW bptr+12(FP), R2 | |
| ADD R0, R1 // end | |
| _next: | |
| CMP R0, R1 | |
| B.EQ _equal // reached the end | |
| MOVBU.P 1(R0), R4 | |
| MOVBU.P 1(R2), R5 | |
| CMP R4, R5 | |
| B.EQ _next | |
| _notequal: | |
| MOVW $0, R0 | |
| MOVW R0, equal+24(FP) | |
| RET | |
| _equal: | |
| MOVW $1, R0 | |
| MOVW R0, equal+24(FP) | |
| RET |