diff options
Diffstat (limited to 'newlib/libc/machine/sh/strcmp.S')
| -rw-r--r-- | newlib/libc/machine/sh/strcmp.S | 225 |
1 files changed, 0 insertions, 225 deletions
diff --git a/newlib/libc/machine/sh/strcmp.S b/newlib/libc/machine/sh/strcmp.S deleted file mode 100644 index 8dcc20b0c..000000000 --- a/newlib/libc/machine/sh/strcmp.S +++ /dev/null @@ -1,225 +0,0 @@ -! SH5 code Copyright 2002 SuperH Ltd. - -#include "asm.h" - -ENTRY(strcmp) - -#if __SHMEDIA__ - ld.ub r2,0,r4 - pt/l quickret0,tr0 - ld.ub r3,0,r5 - ptabs r18,tr2 - beqi/u r4,0,tr0 - ld.ub r2,1,r6 - bne/u r4,r5,tr0 - pt/l quickret1,tr1 - ld.ub r3,1,r7 - beqi/u r6,0,tr1 - ld.ub r2,2,r4 - bne/u r6,r7,tr1 - ld.ub r3,2,r5 - beqi/u r4,0,tr0 - ld.ub r2,3,r6 - bne/u r4,r5,tr0 - ld.ub r3,3,r7 - beqi/u r6,0,tr1 - ld.ub r2,4,r4 - bne/u r6,r7,tr1 - ld.ub r3,4,r5 - beqi/u r4,0,tr0 - ld.ub r2,5,r6 - bne/u r4,r5,tr0 - ld.ub r3,5,r7 - beqi/u r6,0,tr1 - ld.ub r2,6,r4 - bne/u r6,r7,tr1 - ld.ub r3,6,r5 - beqi/u r4,0,tr0 - ld.ub r2,7,r6 - bne/u r4,r5,tr0 - ld.ub r3,7,r7 - beqi/u r6,0,tr1 - sub r3,r2,r3 - bne/u r6,r7,tr1 - - andi r2,-8,r2 - add r3,r2,r3 - ldlo.q r3,8,r23 - pt r23_zero,tr0 - shlli r3,3,r22 - sub r63,r22,r20 - movi 0x101,r6 - mperm.w r6,r63,r6 - SHLO r6,r22,r7 - msubs.ub r7,r23,r8 - pt loop,tr1 - bnei/u r8,0,tr0 // r23_zero - pt found_zero,tr0 - 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 -al_loop: - ld.q r2,8,r4 - ldx.q r2,r3,r5 - addi r2,8,r2 - mcmpeq.b r63,r4,r8 - pt cmp_quad,tr3 - bnei/u r8,0,tr0 // al_found_zero - beq/l r4,r5,tr1 // al_loop - blink tr3,r63 // cmp_quad - - .balign 8 -quickret0: - sub r4,r5,r2 - blink tr2,r63 -quickret1: - sub r6,r7,r2 - blink tr2,r63 - -loop: - ld.q r2,8,r4 - ldx.q r2,r3,r19 - addi r2,8,r2 - msubs.ub r6,r4,r8 - mcmpeq.b r63,r19,r9 - SHHI r19,r20,r21 - or r21,r23,r5 - SHLO r19,r22,r23 - bne/u r8,r9,tr0 // found_zero - beq/l r4,r5,tr1 // loop -cmp_quad: -#ifdef __LITTLE_ENDIAN__ - byterev r4,r4 - byterev r5,r5 -#endif - cmpgtu r4,r5,r6 - cmpgtu r5,r4,r7 - sub r6,r7,r2 - blink tr2,r63 -found_zero: - pt zero_now,tr0 - 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 -r23_zero: - ld.q r2,8,r4 - add r23,r63,r5 -zero_now: -al_found_zero: -/* We konw that one of the values has at lest one zero, and r8 holds - an 0x01 or 0xff mask for every zero found in one of the operands. - If both operands have the first zero in the same place, this mask - allows us to truncate the comparison to the valid bytes in the - strings. If the first zero is in different places, it doesn't - matter if some invalid bytes are included, since the comparison - of the zero with the non-zero will determine the outcome. */ -#ifdef __LITTLE_ENDIAN__ - shlli r8,8,r8 - addi r8,-1,r9 - andc r9,r8,r8 - and r8,r4,r4 - and r8,r5,r5 -#else - shlri r8,1,r8 - nsb r8,r8 - addi r8,8,r8 - andi r8,56,r8 - sub r63,r8,r8 - shlrd r4,r8,r4 - shlrd r5,r8,r5 -#endif -#ifdef __LITTLE_ENDIAN__ - byterev r4,r4 - byterev r5,r5 -#endif - cmpgtu r4,r5,r6 - cmpgtu r5,r4,r7 - sub r6,r7,r2 - blink tr2,r63 - -#else /* ! __SHMEDIA__, i.e. SH 1..4 / SHcompact */ - -#ifdef __SH5__ -#define STR1 r2 -#define STR2 r3 -#define RESULT r2 -#define TMP r4 -#else -! Entry: r4: string1 -! r5: string2 -! Exit: r0: result -! r1-r2,r4-r5: clobbered -#define STR1 r4 -#define STR2 r5 -#define RESULT r0 -#define TMP r2 -#endif /* __SH5__ */ - - mov STR1,r0 - or STR2,r0 - tst #3,r0 - bf L_setup_char_loop - mov #0,r0 -#ifdef DELAYED_BRANCHES - mov.l @STR1+,r1 - .align 2 -Longword_loop: - mov.l @STR2+,TMP - cmp/str r0,r1 - bt Longword_loop_end - cmp/eq r1,TMP - bt.s Longword_loop - mov.l @STR1+,r1 - add #-4, STR1 -Longword_loop_end: - add #-4, STR1 - add #-4, STR2 -L_setup_char_loop: - mov.b @STR1+,r0 - .align 2 -L_char_loop: - mov.b @STR2+,r1 - tst r0,r0 - bt L_return - cmp/eq r0,r1 - bt.s L_char_loop - mov.b @STR1+,r0 - add #-2,STR1 - mov.b @STR1,r0 -#else /* ! DELAYED_BRANCHES */ - .align 2 -Longword_loop: - mov.l @r4+,r1 - mov.l @r5+,r2 - cmp/str r0,r1 - bt Longword_loop_end - cmp/eq r1,r2 - bt Longword_loop -Longword_loop_end: - add #-4, r4 - add #-4, r5 - .align 2 -L_setup_char_loop: -L_char_loop: - mov.b @r4+,r0 - mov.b @r5+,r1 - tst r0,r0 - bt L_return - cmp/eq r0,r1 - bt L_char_loop -#endif -L_return: - extu.b r0,RESULT - extu.b r1,r1 - rts - sub r1,RESULT -#endif /* ! __SHMEDIA__ */ |