.text .align 4 .code 32 .global shr .type shr, %function shr: LSL r0,r0,#16 CMP r0,#0 BEQ end CMP r1,#0 BEQ end BLT lshift rshift: CMP r1,#16 MOVGT r1,#16 ASR r0,r0,r1 B end lshift: RSB r1,r1,#0 CMP r1,#16 MOVGT r1,#16 MOV r2,r0 LSL r0,r0,r1 CMP r2,r0,ASR r1 BEQ end MOV r1,#0x7FFFFFFF EOR r0,r1,r2, ASR #31 end: ASR r0,r0,#16 BX lr
