Use r13 only instead of r13+r15 (bitmasking)

src/console.asm

@@ -91,11 +91,9 @@ puts:
 ;	r9*	(optional arg) >> Keeps track of where to jump after flushing buffer
 ;	r10*	Keeps track of current index of printfBuff
 ;	r11*	Keeps track of total characters (return value)
-;	r12	Padding for numbers (0=nopadding, >0=padding w/ spaces, NOT >0=padding w/ zeroes)
+;	r12	Padding length
-;	r13	Padding: zeroes (=1) or spaces (=0)
+;	r13	Bitmask, 1 = insert specifier yes/no, 2 = use zeroes for padding yes/no
 ;	r14	Keeps track of amount of processed format specifiers
-;	r15	Include prefix for specifiers (1=yes, 0=no)
-;<!>	TODO:	Keep r13 and r15 in one register (use bitmasking to determine whether to pad with zeroes or spaces and whether to include prefix)
 printf:
 	%macro load_arg 1
 	cmp	r14, 4
@@ -129,7 +127,7 @@ printf:
 		load_arg rsi
 		push_regs
 	mov	rdi, rsi
-	test	r15, r15
+	test	r13, 1
 	jz	%%baseNormal
 	mov	rsi, ~%1
 	jmp	%%args
@@ -137,7 +135,13 @@ printf:
 	mov	rsi, %1
 	%%args:
 	mov	rdx, r12
-	mov	rcx, r13
+	test	r13, 2
+	jz	%%padSpaces
+	mov	rcx, 1
+	jmp	%%movr8 ;nice label name isn't it?
+	%%padSpaces:
+	mov	rcx, 0
+	%%movr8:
 	mov	r8, %2
 	call	%3
 	mov	rsi, rax
@@ -148,10 +152,10 @@ printf:
 	; entry:
 	push	rbp
 	mov	rbp, rsp
+	sub	rsp, SIZE_QWORD
 	push	r12
 	push	r13
 	push	r14
-	push	r15
 
 	cmp	byte [rdi], EOS
 	je	.emptyStr
@@ -167,7 +171,6 @@ printf:
 	xor	r10, r10
 	xor	r11, r11
 	xor	r14, r14
-	xor	r15, r15
 
 	.process:
 		cmp	byte [rdi], EOS
@@ -218,19 +221,20 @@ printf:
 		je	.wrapup
 		cmp	byte [rdi + 1], '%'
 		je	.rep_pct
-		; Include specifier (r15=1) or not (r15=0)
+		; Include specifier (r13 bit0=1) or not (bit0=0)
-		xor	r15, r15
+		xor	r13, r13
 		cmp	byte [rdi + 1], '#'
 		jne	.argGetPadZeroes
 		inc	rdi
-		mov	r15, 1
+		bts	r13, 0
-		; Padding: zeroes (r13=1) or spaces (r13=0)
+		; Padding: zeroes (r13i bit1=1) or spaces (bit1=0)
 		.argGetPadZeroes:
-		xor	r13, r13
 		mov	r12, 1
 		cmp	byte [rdi + 1], '0'
 		jb	.noPadding
-		cmove	r13, r12
+		ja	.padSpaces
+		bts	r13, 1
+		.padSpaces:
 		cmp	byte [rdi + 1], '9'
 		jg	.noPadding
 		xor	r12, r12
@@ -335,7 +339,7 @@ printf:
 
 		;--- '%p' ---;
 		.rep_p:
-		mov	r15, 1 ;always force prefix, no matter if %p or %#p was used. Do not override padding though
+		bts	r13, 0 ;always force prefix, no matter if %p or %#p was used. Do not override padding though
 			process_arg 16, 0, utoa
 
 		;--- '%s' ---;
@@ -360,7 +364,6 @@ printf:
 		inc	r14
 		add	rdi, 2
 		xor	r12, r12
-		xor	r13, r13
 		jmp	.process
 
 		;--- Insert char to buffer ---;
@@ -370,7 +373,6 @@ printf:
 		add	r10, 1
 		add	r11, 1
 		xor	r12, r12
-		xor	r13, r13
 		inc	r14
 		jmp	.process
 
@@ -411,9 +413,9 @@ printf:
 	xor	rax, rax
 
 	.quit:
-	pop	r15
 	pop	r14
 	pop	r13
 	pop	r12
+	add	rsp, SIZE_QWORD
 	leave
 	ret