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Diffstat (limited to 'src/arch/e1/core/strcmp.S')
| -rw-r--r-- | src/arch/e1/core/strcmp.S | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/src/arch/e1/core/strcmp.S b/src/arch/e1/core/strcmp.S new file mode 100644 index 000000000..5f09daa70 --- /dev/null +++ b/src/arch/e1/core/strcmp.S @@ -0,0 +1,76 @@ +/* + * Derived from the Hyperstone's library source code. + * Modefied src in order to apply the -mgnu-param compiler option. + * Copyright (C) 2002-2003 GDT, Yannis Mitsos <gmitsos@telecom.ntua.gr> + * George Thanos <gthanos@telecom.ntua.gr> + */ + .text + .align 2 + .global _strcmp +;ENTRY(_strcmp) +_strcmp: + FRAME L8,L2 + CMPBI L1, 3 # check for word alignment + BNZ str_except + CMPBI L0, 3 # check for word alignment + BNZ str_except + +start: + LDD.P L1, L4 # post inc mode + LDD.P L0, L6 # post inc mode + CMPBI L4, ANYBZ + BE correct1 + CMP L4, L6 + BNE correct1 + CMP L5, L7 + BNE correct + CMPBI L5, ANYBZ + BE correct + CMPBI L6, ANYBZ + BE correct1 + CMPBI L7, ANYBZ + BNE start + +correct: MASK L4, L5, 0xff000000 + MASK L6, L7, 0xff000000 + CMP L4, L6 + BNE Exit + SHLI L5, 8 + CMPI L4, 0 + DBNE correct + SHLI L7, 8 + MOV L1, L4 + RET PC, L2 + +Exit: SUB L4, L6 # Subtract chars + SARI L4, 24 + MOV L1, L4 + RET PC, L2 + +correct1: MASK L5, L4, 0xff000000 + MASK L7, L6, 0xff000000 + CMP L5, L7 + BNE Exit1 + SHLI L4, 8 + CMPI L5, 0 + DBNE correct1 + SHLI L6, 8 + MOV L1, L5 + RET PC, L2 +Exit1: SUB L5, L7 # Subtract chars + SARI L5, 24 + MOV L1, L5 + RET PC, L2 + +testzero: CMPI L4, 0 + BE L_5 +str_except: + LDBU.N L1, L4, 1 # Load *s1, compare bytes + LDBU.N L0, L5, 1 # Load *s2, compare bytes + CMP L4, L5 + BE testzero + SUB L4, L5 # Subtract chars +L_5: MOV L1, L4 + RET PC, L2 + .END + |