Code generation of ('0' + q)%UInt8

gistfile1.txt

julia> f(q) = ('0' + q)%UInt8
f (generic function with 1 method)

julia> @code_native f(0x9)
	.section	__TEXT,__text,regular,pure_instructions
; Function f {
; Location: REPL[9]:1
	pushq	%rbp
	pushq	%r14
	pushq	%rbx
	movl	%edi, %eax
	movabsq	$"+", %rcx
	movl	$805306368, %edi        ## imm = 0x30000000
	movl	%eax, %esi
	callq	*%rcx
; Function rem; {
; Location: char.jl:75
; Function Type; {
; Location: char.jl:30
	testl	%eax, %eax
	js	L37
; Function >>; {
; Location: int.jl:425
; Function >>; {
; Location: int.jl:419
	shrl	$24, %eax
	jmp	L265
;}}
; Location: char.jl:31
; Function leading_ones; {
; Location: int.jl:388
; Function ~; {
; Location: int.jl:271
L37:
	movl	%eax, %ecx
	notl	%ecx
;}
; Function leading_zeros; {
; Location: int.jl:352
	lzcntl	%ecx, %r14d
;}}
; Location: char.jl:32
; Function trailing_zeros; {
; Location: int.jl:364
	tzcntl	%eax, %esi
;}
; Function &; {
; Location: int.jl:287
	andl	$56, %esi
;}
; Location: char.jl:33
; Function ==; {
; Location: promotion.jl:435
	cmpl	$1, %r14d
	sete	%r10b
;}
; Function +; {
; Location: int.jl:53
	leaq	(%rsi,%r14,8), %rdi
;}
; Function >; {
; Location: operators.jl:250
; Function <; {
; Location: int.jl:49
	cmpq	$32, %rdi
	seta	%r8b
;}}
; Function &; {
; Location: int.jl:287
	movl	%eax, %edi
	andl	$12632256, %edi         ## imm = 0xC0C0C0
;}
; Function xor; {
; Location: int.jl:304
	xorl	$8421504, %edi          ## imm = 0x808080
;}
; Function >>; {
; Location: int.jl:425
; Function >>; {
; Location: int.jl:419
	cmpq	$31, %rsi
	seta	%r9b
	shrxl	%esi, %edi, %edi
;}}
; Function !=; {
; Location: operators.jl:158
; Function ==; {
; Location: int.jl:409
; Function ==; {
; Location: promotion.jl:358
; Function ==; {
; Location: promotion.jl:435
	testl	%edi, %edi
	sete	%dl
;}}}}
; Function is_overlong_enc; {
; Location: char.jl:20
; Function ==; {
; Location: promotion.jl:358
; Function ==; {
; Location: promotion.jl:435
	movl	%eax, %edi
	andl	$4278190080, %edi       ## imm = 0xFF000000
	cmpl	$3221225472, %edi       ## imm = 0xC0000000
	sete	%r11b
	cmpl	$3238002688, %edi       ## imm = 0xC1000000
	sete	%cl
	movl	%eax, %edi
	andl	$4292870144, %edi       ## imm = 0xFFE00000
	cmpl	$3766484992, %edi       ## imm = 0xE0800000
	sete	%dil
	movl	%eax, %ebp
	andl	$4293918720, %ebp       ## imm = 0xFFF00000
	cmpl	$4034920448, %ebp       ## imm = 0xF0800000
	sete	%bl
;}}}
; Function |; {
; Location: bool.jl:37
	orb	%r9b, %dl
	xorb	$1, %dl
;}
; Function is_overlong_enc; {
; Location: char.jl:20
; Function |; {
; Location: bool.jl:37
	orb	%r11b, %cl
	orb	%r10b, %cl
	orb	%dil, %bl
	orb	%cl, %bl
;}}
	orb	%r8b, %bl
	orb	%dl, %bl
	jne	L270
; Location: char.jl:36
; Function >>; {
; Location: int.jl:425
; Function >>; {
; Location: int.jl:419
	xorl	%ecx, %ecx
	cmpl	$31, %r14d
	movl	$4294967295, %edx       ## imm = 0xFFFFFFFF
	shrxl	%r14d, %edx, %edx
	cmoval	%ecx, %edx
;}}
; Function &; {
; Location: int.jl:287
	andl	%eax, %edx
	cmpq	$31, %rsi
;}
; Location: char.jl:37
; Function >>; {
; Location: int.jl:425
; Function >>; {
; Location: int.jl:419
	shrxl	%esi, %edx, %eax
	cmoval	%ecx, %eax
;}}
; Location: char.jl:38
; Function &; {
; Location: int.jl:287
	movl	%eax, %ecx
	andl	$127, %ecx
;}
; Function >>; {
; Location: int.jl:425
; Function >>; {
; Location: int.jl:419
	movl	%eax, %edx
	shrl	$2, %edx
	andl	$8128, %edx             ## imm = 0x1FC0
;}}
; Function |; {
; Location: int.jl:303
	orl	%ecx, %edx
;}
; Function >>; {
; Location: int.jl:425
; Function >>; {
; Location: int.jl:419
	movl	%eax, %ecx
	shrl	$4, %ecx
	andl	$520192, %ecx           ## imm = 0x7F000
	shrl	$6, %eax
	andl	$33292288, %eax         ## imm = 0x1FC0000
;}}
; Function |; {
; Location: int.jl:303
	orl	%ecx, %eax
	orl	%edx, %eax
;}}}
L265:
	popq	%rbx
	popq	%r14
	popq	%rbp
	retq
; Function rem; {
; Location: char.jl:75
; Function Type; {
; Location: char.jl:33
L270:
	movabsq	$invalid_char, %rcx
	movl	%eax, %edi
	callq	*%rcx
	ud2
	nop
;}}}