Wrong behavior when assemble instruction beq

[eeyrw]

I test this asm with the assembler, but it gives wrong result of instruction beq:

.text
loop:
		addi $t1, $t1, 1
		add $t0, $t0, $t1
		addi $t6, $zero, 100
		slt $t5, $t1, $t6
		addi $t6, $zero, 1
		beq  $t5, $t6, loop

It give machine code:

21290001
01094020
200E0064
012E682A
200E0001
11AE0018

I attempted to assemble by other assembler (https://alanhogan.com/asu/assembler.php) which gave result:

00400000: <loop>	; <input:4> loop:
00400000: 21290001	; <input:5> addi $t1, $t1, 1
00400004: 01094020	; <input:6> add $t0, $t0, $t1
00400008: 200e0064	; <input:7> addi $t6, $zero, 100
0040000c: 012e682a	; <input:8> slt $t5, $t1, $t6
00400010: 200e0001	; <input:9> addi $t6, $zero, 1
00400014: 11aefffa	; <input:10> beq $t5, $t6, loop

I checked the last instruction beq and found that the assembler generated incorrect address offset of label loop. In this case, offset should be a negative number.