diff options
| -rw-r--r-- | arch/arm/lib/lib1funcs.S | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/arch/arm/lib/lib1funcs.S b/arch/arm/lib/lib1funcs.S index c343ea9..408839b 100644 --- a/arch/arm/lib/lib1funcs.S +++ b/arch/arm/lib/lib1funcs.S @@ -349,3 +349,56 @@ UNWIND(.save {lr}) ldr pc, [sp], #8 UNWIND(.fnend) ENDPROC(Ldiv0) + +/* Thumb-1 specialities */ +#if defined(CONFIG_SYS_THUMB_BUILD) && !defined(CONFIG_HAS_THUMB2) +ENTRY(__gnu_thumb1_case_sqi) + push {r1} + mov r1, lr + lsrs r1, r1, #1 + lsls r1, r1, #1 + ldrsb r1, [r1, r0] + lsls r1, r1, #1 + add lr, lr, r1 + pop {r1} + bx lr +ENDPROC(__gnu_thumb1_case_sqi) + +ENTRY(__gnu_thumb1_case_uqi) + push {r1} + mov r1, lr + lsrs r1, r1, #1 + lsls r1, r1, #1 + ldrb r1, [r1, r0] + lsls r1, r1, #1 + add lr, lr, r1 + pop {r1} + bx lr +ENDPROC(__gnu_thumb1_case_uqi) + +ENTRY(__gnu_thumb1_case_shi) + push {r0, r1} + mov r1, lr + lsrs r1, r1, #1 + lsls r0, r0, #1 + lsls r1, r1, #1 + ldrsh r1, [r1, r0] + lsls r1, r1, #1 + add lr, lr, r1 + pop {r0, r1} + bx lr +ENDPROC(__gnu_thumb1_case_shi) + +ENTRY(__gnu_thumb1_case_uhi) + push {r0, r1} + mov r1, lr + lsrs r1, r1, #1 + lsls r0, r0, #1 + lsls r1, r1, #1 + ldrh r1, [r1, r0] + lsls r1, r1, #1 + add lr, lr, r1 + pop {r0, r1} + bx lr +ENDPROC(__gnu_thumb1_case_uhi) +#endif |