diff options
| author | Joern Rennecke <joern.rennecke@embecosm.com> | 2002-07-08 16:56:32 +0400 |
|---|---|---|
| committer | Joern Rennecke <joern.rennecke@embecosm.com> | 2002-07-08 16:56:32 +0400 |
| commit | e47e6f0e3032d46ff2f3e4ffa7de2beb2bc9a60d (patch) | |
| tree | 57476522919923f687c1bb151d211d1ada2c71e0 /newlib/libc/machine/sh/strcmp.S | |
| parent | 23c3a85872597c87dfeeb37f6ef42dab25406951 (diff) | |
Some small speedups.
Diffstat (limited to 'newlib/libc/machine/sh/strcmp.S')
| -rw-r--r-- | newlib/libc/machine/sh/strcmp.S | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/newlib/libc/machine/sh/strcmp.S b/newlib/libc/machine/sh/strcmp.S index 850c82b50..8dcc20b0c 100644 --- a/newlib/libc/machine/sh/strcmp.S +++ b/newlib/libc/machine/sh/strcmp.S @@ -55,14 +55,16 @@ ENTRY(strcmp) pt loop,tr1 bnei/u r8,0,tr0 // r23_zero pt found_zero,tr0 - ori r3,7,r3 - addi r3,9,r3 + addi r3,15,r3 + andi r3,-8,r3 sub r3,r2,r3 bne/l r7,r6,tr1 // loop /* The strings are aligned to each other. */ + /* It is possible to have a loop with six cycles / iteration + by re-ordering the exit conditions, but then it needs extra + time and/or code to sort out the r4 != r5 case. */ pt al_loop,tr1 pt al_found_zero,tr0 - addi r3,-8,r3 al_loop: ld.q r2,8,r4 ldx.q r2,r3,r5 @@ -103,8 +105,8 @@ cmp_quad: blink tr2,r63 found_zero: pt zero_now,tr0 - mcmpeq.b r63,r5,r7 pt cmp_quad,tr1 + SHHI r9,r20,r7 bne/u r8,r7,tr0 // zero_now bne/u r4,r5,tr1 // cmp_quad SHLO r9,r22,r8 |