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Added asm wrapper for printf

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This commit is contained in:
Egor Sheremetov 2024-02-05 14:18:06 +01:00 • committed by Roman Venediktov
parent f6516bae63
commit e0189d5654
3 changed files with 164 additions and 53 deletions
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90
runtime/printf.s Normal file
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.section .text
.global Lprintf
.extern printf
.global Lfprintf
.extern fprintf
.global Lsprintf
.extern sprintf
.extern cnt_percentage_sign
Lprintf:
pushq %rbp
movq %rsp, %rbp
movq %rdi, -40(%rbp)
movq %rsi, -48(%rbp)
movq -48(%rbp), %rax
movq %rax, -16(%rbp)
movl $0, -4(%rbp)
jmp .L2
.L5:
movq -40(%rbp), %rax
movzbl (%rax), %eax
cmpb $37, %al
jne .L3
movl -4(%rbp), %eax
cltq
leaq 0(,%rax,8), %rdx
movq -16(%rbp), %rax
addq %rdx, %rax
movq (%rax), %rax
movq %rax, -24(%rbp)
movq -24(%rbp), %rax
andl $1, %eax
testq %rax, %rax
je .L4
movl -4(%rbp), %eax
cltq
leaq 0(,%rax,8), %rdx
movq -16(%rbp), %rax
addq %rdx, %rax
movq -24(%rbp), %rdx
sarq %rdx
movq %rdx, (%rax)
.L4:
addl $1, -4(%rbp)
.L3:
addq $1, -40(%rbp)
.L2:
movq -40(%rbp), %rax
movzbl (%rax), %eax
testb %al, %al
jne .L5
movq -40(%rbp), %rax
movq %rax, %rdi
cmpl $0, -4(%rbp)
jle .L6
movq -16(%rbp), %rax
movq (%rax), %rax
movq %rax, %rsi
.L6:
cmpl $1, -4(%rbp)
jle .L7
movq -16(%rbp), %rax
movq 8(%rax), %rax
movq %rax, %rdx
.L7:
cmpl $2, -4(%rbp)
jle .L8
movq -16(%rbp), %rax
movq 16(%rax), %rax
movq %rax, %rcx
.L8:
cmpl $3, -4(%rbp)
jle .L9
movq -16(%rbp), %rax
movq 24(%rax), %rax
movq %rax, %r8
.L9:
cmpl $4, -4(%rbp)
jle .L11
movq -16(%rbp), %rax
movq 32(%rax), %rax
movq %rax, %r9
.L11:
nop
popq %rbp
jmp printf