Fix some cases with 0, and fix a label name

bmi-calc/main.nasm

@@ -84,7 +84,7 @@ good_height:
     syscall
 
     cmp r14,0
-    je print_zero_bmi
+    je print_inf_bmi
 
     ; calculate bmi (kg/(m^2))
     movq xmm1,r14 ; height
@@ -118,7 +118,7 @@ exit:
     mov rax,SYS_exit
     syscall
 
-print_zero_bmi:
+print_inf_bmi:
     mov rax,SYS_write
     mov rdi,FD_stdout
     mov rsi,bmi_notice_text
@@ -127,8 +127,8 @@ print_zero_bmi:
 
     mov rax,SYS_write
     mov rdi,FD_stdout
-    mov rsi,zero_float_text
-    mov rdx,zero_float_length
+    mov rsi,inf_float_text
+    mov rdx,inf_float_length
     syscall
 
     mov rax,SYS_write
@@ -185,7 +185,7 @@ print_float_scale_loop:
     cvtss2si rax,xmm0
     mov rcx,23
     mov rbx,10
-print_float_reverse_loop:
+print_float_mem_loop:
     xor rdx,rdx
     div rbx
     add rdx,'0'
@@ -193,7 +193,7 @@ print_float_reverse_loop:
     dec rcx
 
     cmp rax,0
-    jne print_float_reverse_loop
+    jne print_float_mem_loop
 
     push rcx
     push rdi
@@ -398,6 +398,8 @@ period_char: db "."
 newline_char: db 0xA
 zero_float_text: db ".000"
 zero_float_length: equ $ - zero_float_text
+inf_float_text: db "Infinity"
+inf_float_length: equ $ - inf_float_text
 _10f: dd 10.0
 _0.1f: dd 0.1
 _100f: dd 100.0