Zander671/asm-practice
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Fix some cases with 0, and fix a label name

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This commit is contained in:
Alexander Rosenberg
2022-10-06 23:55:27 -07:00
parent 3b913b0ceb
commit a89bc395b2
1 changed files with 42 additions and 3 deletions
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45
bmi-calc/main.nasm
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@ -83,6 +83,9 @@ good_height:
mov rdx,height_notice_post_length mov rdx,height_notice_post_length
syscall syscall
cmp r14,0
je print_inf_bmi
; calculate bmi (kg/(m^2)) ; calculate bmi (kg/(m^2))
movq xmm1,r14 ; height movq xmm1,r14 ; height
divss xmm1,[_100f] ; cm to m divss xmm1,[_100f] ; cm to m
@ -110,11 +113,32 @@ good_height:
call clear_stdin call clear_stdin
; exit exit:
xor rdi,rdi xor rdi,rdi
mov rax,SYS_exit mov rax,SYS_exit
syscall syscall
print_inf_bmi:
mov rax,SYS_write
mov rdi,FD_stdout
mov rsi,bmi_notice_text
mov rdx,bmi_notice_length
syscall
mov rax,SYS_write
mov rdi,FD_stdout
mov rsi,inf_float_text
mov rdx,inf_float_length
syscall
mov rax,SYS_write
mov rdi,FD_stdout
mov rsi,newline_char
mov rdx,1
syscall
jmp exit
clear_stdin: clear_stdin:
; 16 - read buff ; 16 - read buff
; 4 - pollfd.fd ; 4 - pollfd.fd
@ -146,6 +170,10 @@ clear_stdin_end:
ret ret
print_float: ; void print_float(float f, int percission) print_float: ; void print_float(float f, int percission)
movq rax,xmm0
cmp rax,0
je print_float_zero
sub rsp,24 sub rsp,24
movss xmm1,[_10f] movss xmm1,[_10f]
mov rcx,rdi mov rcx,rdi
@ -157,7 +185,7 @@ print_float_scale_loop:
cvtss2si rax,xmm0 cvtss2si rax,xmm0
mov rcx,23 mov rcx,23
mov rbx,10 mov rbx,10
print_float_reverse_loop: print_float_mem_loop:
xor rdx,rdx xor rdx,rdx
div rbx div rbx
add rdx,'0' add rdx,'0'
@ -165,7 +193,7 @@ print_float_reverse_loop:
dec rcx dec rcx
cmp rax,0 cmp rax,0
jne print_float_reverse_loop jne print_float_mem_loop
push rcx push rcx
push rdi push rdi
@ -202,6 +230,13 @@ print_float_reverse_loop:
add rsp,24 add rsp,24
ret ret
print_float_zero:
mov rax,SYS_write
mov rdi,FD_stdout
mov rsi,zero_float_text
mov rdx,zero_float_length
syscall
ret
; on error, return 0 in rax. otherwise, return 1 in rax ; on error, return 0 in rax. otherwise, return 1 in rax
; and the result in xmm0 ; and the result in xmm0
@ -361,6 +396,10 @@ size_error_text: db "Number too long!",0xA
size_error_length: equ $ - size_error_text size_error_length: equ $ - size_error_text
period_char: db "." period_char: db "."
newline_char: db 0xA 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 _10f: dd 10.0
_0.1f: dd 0.1 _0.1f: dd 0.1
_100f: dd 100.0 _100f: dd 100.0