ObjFW  Check-in [71d8f813ef]

Overview
Comment:Remove unnecessary `short` from assembly
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Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA3-256: 71d8f813efdaea4acdc0f958a22b71ba7f62d1c4edeaf17f4fe2cdb06f219e29
User & Date: js on 2023-10-28 18:45:35
Other Links: manifest | tags
Context
2023-10-28
18:50
Fix accidentally left over movq check-in: 7a1b76cbec user: js tags: trunk
18:45
Remove unnecessary `short` from assembly check-in: 71d8f813ef user: js tags: trunk
18:35
Use more local labels in assembly check-in: cb18f26404 user: js tags: trunk
Changes
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Modified src/forwarding/forwarding-amd64-elf.S from [60cb5f07a9] to [c81bf7cc2c].

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	call	object_getClass@PLT

	mov	rdi, rax
	lea	rsi, [rip + .Lsel_forwardingTargetForSelector_]
	call	class_respondsToSelector@PLT

	test	rax, rax
	jz	short 0f
	jz	0f

	mov	rdi, [rbp - 0x10]
	lea	rsi, [rip + .Lsel_forwardingTargetForSelector_]
	call	objc_msg_lookup@PLT

	mov	rdi, [rbp - 0x10]
	lea	rsi, [rip + .Lsel_forwardingTargetForSelector_]
	mov	rdx, [rbp - 0x18]
	call	rax

	test	rax, rax
	jz	short 0f
	jz	0f
	cmp	rax, [rbp - 0x10]
	je	short 0f
	je	0f

	mov	[rbp - 0x10], rax

	mov	rdi, rax
	mov	rsi, [rbp - 0x18]
	call	objc_msg_lookup@PLT
	mov	r11, rax
︙
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	call	object_getClass@PLT

	mov	rdi, rax
	lea	rsi, [rip + .Lsel_forwardingTargetForSelector_]
	call	class_respondsToSelector@PLT

	test	rax, rax
	jz	short 0f
	jz	0f

	mov	rdi, [rbp - 0x18]
	lea	rsi, [rip + .Lsel_forwardingTargetForSelector_]
	call	objc_msg_lookup@PLT

	mov	rdi, [rbp - 0x18]
	lea	rsi, [rip + .Lsel_forwardingTargetForSelector_]
	mov	rdx, [rbp - 0x20]
	call	rax

	test	rax, rax
	jz	short 0f
	jz	0f
	cmp	rax, [rbp - 0x18]
	je	short 0f
	je	0f

	mov	[rbp - 0x18], rax

	mov	rdi, rax
	mov	rsi, [rbp - 0x20]
	call	objc_msg_lookup_stret@PLT
	mov	r11, rax
︙

Modified src/forwarding/forwarding-amd64-win64.S from [bb16226b9b] to [43dda63d1e].

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	call	object_getClass

	mov	rcx, rax
	lea	rdx, [rip + .Lsel_forwardingTargetForSelector_]
	call	class_respondsToSelector

	test	rax, rax
	jz	short 0f
	jz	0f

	mov	rcx, [rbp - 0x30]
	lea	rdx, [rip + .Lsel_forwardingTargetForSelector_]
	call	objc_msg_lookup

	mov	rcx, [rbp - 0x30]
	lea	rdx, [rip + .Lsel_forwardingTargetForSelector_]
	mov	r8, [rbp - 0x38]
	call	rax

	test	rax, rax
	jz	short 0f
	jz	0f
	cmp	rax, [rbp - 0x30]
	je	short 0f
	je	0f

	mov	[rbp - 0x30], rax

	mov	rcx, rax
	mov	rdx, [rbp - 0x38]
	call	objc_msg_lookup
	mov	r11, rax
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	call	object_getClass

	mov	rcx, rax
	lea	rdx, [rip + .Lsel_forwardingTargetForSelector_]
	call	class_respondsToSelector

	test	rax, rax
	jz	short 0f
	jz	0f

	mov	rcx, [rbp - 0x38]
	lea	rdx, [rip + .Lsel_forwardingTargetForSelector_]
	call	objc_msg_lookup

	mov	rcx, [rbp - 0x38]
	lea	rdx, [rip + .Lsel_forwardingTargetForSelector_]
	mov	r8, [rbp - 0x40]
	call	rax

	test	rax, rax
	jz	short 0f
	jz	0f
	cmp	rax, [rbp - 0x38]
	je	short 0f
	je	0f

	mov	[rbp - 0x38], rax

	mov	rcx, rax
	mov	rdx, [rbp - 0x40]
	call	objc_msg_lookup_stret
	mov	r11, rax
︙

Modified src/forwarding/forwarding-x86-elf.S from [7d07165df3] to [6488f750ac].

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	mov	[esp], eax
	lea	eax, [ebx + .Lsel_forwardingTargetForSelector_@GOTOFF]
	mov	[esp + 4], eax
	call	class_respondsToSelector@PLT

	test	eax, eax
	jz	short 0f
	jz	0f

	mov	eax, [ebp + 8]
	mov	[esp], eax
	lea	eax, [ebx + .Lsel_forwardingTargetForSelector_@GOTOFF]
	mov	[esp + 4], eax
	call	objc_msg_lookup@PLT

	mov	edx, [ebp + 8]
	mov	[esp], edx
	lea	edx, [ebx + .Lsel_forwardingTargetForSelector_@GOTOFF]
	mov	[esp + 4], edx
	mov	edx, [ebp + 12]
	mov	[esp + 8], edx
	call	eax

	test	eax, eax
	jz	short 0f
	jz	0f
	cmp	eax, [ebp + 8]
	je	short 0f
	je	0f

	mov	[ebp + 8], eax
	mov	[esp], eax
	mov	eax, [ebp + 12]
	mov	[esp + 4], eax
	call	objc_msg_lookup@PLT
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	mov	[esp], eax
	lea	eax, [ebx + .Lsel_forwardingTargetForSelector_@GOTOFF]
	mov	[esp + 4], eax
	call	class_respondsToSelector@PLT

	test	eax, eax
	jz	short 0f
	jz	0f

	mov	eax, [ebp + 12]
	mov	[esp], eax
	lea	eax, [ebx + .Lsel_forwardingTargetForSelector_@GOTOFF]
	mov	[esp  + 4], eax
	mov	[esp + 4], eax
	call	objc_msg_lookup@PLT

	mov	edx, [ebp + 12]
	mov	[esp], edx
	lea	edx, [ebx + .Lsel_forwardingTargetForSelector_@GOTOFF]
	mov	[esp + 4], edx
	mov	edx, [ebp + 16]
	mov	[esp + 8], edx
	call	eax

	test	eax, eax
	jz	short 0f
	jz	0f
	cmp	eax, [ebp + 12]
	je	short 0f
	je	0f

	mov	[ebp + 12], eax
	mov	[esp], eax
	mov	eax, [ebp + 16]
	mov	[esp + 4], eax
	call	objc_msg_lookup_stret@PLT
︙

Modified src/forwarding/forwarding-x86-win32.S from [a9803a8051] to [e2482c7f1d].

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	mov	[esp], eax
	mov	eax, offset .Lsel_forwardingTargetForSelector_
	mov	[esp + 4], eax
	call	_class_respondsToSelector

	test	eax, eax
	jz	short 0f
	jz	0f

	mov	eax, [ebp + 8]
	mov	[esp], eax
	mov	eax, offset .Lsel_forwardingTargetForSelector_
	mov	[esp + 4], eax
	call	_objc_msg_lookup

	mov	edx, [ebp + 8]
	mov	[esp], edx
	mov	edx, offset .Lsel_forwardingTargetForSelector_
	mov	[esp + 4], edx
	mov	edx, [ebp + 12]
	mov	[esp + 8], edx
	call	eax

	test	eax, eax
	jz	short 0f
	jz	0f
	cmp	eax, [ebp + 8]
	je	short 0f
	je	0f

	mov	[ebp + 8], eax
	mov	[esp], eax
	mov	eax, [ebp + 12]
	mov	[esp + 4], eax
	call	_objc_msg_lookup
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	mov	[esp], eax
	mov	eax, offset .Lsel_forwardingTargetForSelector_
	mov	[esp + 4], eax
	call	_class_respondsToSelector

	test	eax, eax
	jz	short 0f
	jz	0f

	mov	eax, [ebp + 12]
	mov	[esp], eax
	mov	eax, offset .Lsel_forwardingTargetForSelector_
	mov	[esp + 4], eax
	call	_objc_msg_lookup

	mov	edx, [ebp + 12]
	mov	[esp], edx
	mov	edx, offset .Lsel_forwardingTargetForSelector_
	mov	[esp + 4], edx
	mov	edx, [ebp + 16]
	mov	[esp + 8], edx
	call	eax

	test	eax, eax
	jz	short 0f
	jz	0f
	cmp	eax, [ebp + 12]
	je	short 0f
	je	0f

	mov	[ebp + 12], eax
	mov	[esp], eax
	mov	eax, [ebp + 16]
	mov	[esp  + 4], eax
	mov	[esp + 4], eax
	call	_objc_msg_lookup_stret

	add	esp, 20
	pop	ebx
	pop	ebp

	jmp	eax
︙

Modified src/platform/x86/OFAtomic.h from [19cc36e8a6] to [5dfd999b87].

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	__asm__ __volatile__ (
	    "0:\n\t"
	    "mov{l}	{ %2, %0 | %0, %2 }\n\t"
	    "mov{l}	{ %0, %%eax | eax, %0 }\n\t"
	    "or{l}	{ %1, %0 | %0, %1 }\n\t"
	    "lock\n\t"
	    "cmpxchg{l}	{ %0, %2 | %2, %0 }\n\t"
	    "jne	{ | short } 0b"
	    "jne	0b"
	    : "=&r"(i)
	    : "r"(i), "m"(*p)
	    : "eax", "cc"
	);

	return i;
}
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		__asm__ __volatile__ (
		    "0:\n\t"
		    "mov{q}	{ %2, %0 | %0, %2 }\n\t"
		    "mov{q}	{ %0, %%rax | rax, %0 }\n\t"
		    "or{q}	{ %1, %0 | %0, %1 }\n\t"
		    "lock\n\t"
		    "cmpxchg{q}	{ %0, %2 | %2, %0 }\n\t"
		    "jne	{ | short } 0b"
		    "jne	0b"
		    : "=&r"(i)
		    : "r"(i), "m"(*p)
		    : "rax", "cc"
		);
#endif
	else
		abort();
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	__asm__ __volatile__ (
	    "0:\n\t"
	    "mov{l}	{ %2, %0 | %0, %2 }\n\t"
	    "mov{l}	{ %0, %%eax | eax, %0 }\n\t"
	    "and{l}	{ %1, %0 | %0, %1 }\n\t"
	    "lock\n\t"
	    "cmpxchg{l}	{ %0, %2 | %2, %0 }\n\t"
	    "jne	{ | short } 0b"
	    "jne	0b"
	    : "=&r"(i)
	    : "r"(i), "m"(*p)
	    : "eax", "cc"
	);

	return i;
}
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		__asm__ __volatile__ (
		    "0:\n\t"
		    "mov{q}	{ %2, %0 | %0, %2 }\n\t"
		    "mov{q}	{ %0, %%rax | rax, %0 }\n\t"
		    "and{q}	{ %1, %0 | %0, %1 }\n\t"
		    "lock\n\t"
		    "cmpxchg{q}	{ %0, %2 | %2, %0 }\n\t"
		    "jne	{ | short } 0b"
		    "jne	0b"
		    : "=&r"(i)
		    : "r"(i), "m"(*p)
		    : "rax", "cc"
		);
#endif
	else
		abort();
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	__asm__ __volatile__ (
	    "0:\n\t"
	    "mov{l}	{ %2, %0 | %0, %2 }\n\t"
	    "mov{l}	{ %0, %%eax | eax, %0 }\n\t"
	    "xor{l}	{ %1, %0 | %0, %1 }\n\t"
	    "lock\n\t"
	    "cmpxchg{l}	{ %0, %2 | %2, %0 }\n\t"
	    "jne	{ | short } 0b"
	    "jne	0b"
	    : "=&r"(i)
	    : "r"(i), "m"(*p)
	    : "eax", "cc"
	);

	return i;
}
︙
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		__asm__ __volatile__ (
		    "0:\n\t"
		    "mov{q}	{ %2, %0 | %0, %2 }\n\t"
		    "mov{q}	{ %0, %%rax | rax, %0 }\n\t"
		    "xor{q}	{ %1, %0 | %0, %1 }\n\t"
		    "lock\n\t"
		    "cmpxchg{q}	{ %0, %2 | %2, %0 }\n\t"
		    "jne	{ | short } 0b"
		    "jne	0b"
		    : "=&r"(i)
		    : "r"(i), "m"(*p)
		    : "rax", "cc"
		);
#endif
	else
		abort();
︙

Modified src/runtime/lookup-asm/lookup-asm-amd64-elf.S from [d1cf6bd700] to [c80a243830].

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.globl objc_msg_lookup_super
.globl objc_msg_lookup_super_stret

.section .text
.macro GENERATE_LOOKUP name notFound
\name:
	test	rdi, rdi
	jz	short .LreturnNilMethod
	jz	.LreturnNilMethod

	test	dil, 1
	jnz	short .LtaggedPointer_\name
	jnz	.LtaggedPointer_\name

	mov	r8, [rdi]
	mov	r8, [r8 + 64]

.Lmain_\name:
	mov	rax, [rsi]
	movzx	ecx, ah
	movzx	edx, al
#ifdef OF_SELUID24
	shr	eax, 16

	mov	r8, [r8 + 8 * rax]
#endif
	mov	r8, [r8 + 8 * rcx]
	mov	rax, [r8 + 8 * rdx]

	test	rax, rax
	jz	short \notFound@PLT
	jz	\notFound@PLT

	ret

.LtaggedPointer_\name:
	mov	rax, [rip + objc_taggedPointerSecret@GOTPCREL]
	xor	rdi, [rax]
	and	dil, 0xE
	movzx	r8d, dil

	mov	rax, [rip + objc_taggedPointerClasses@GOTPCREL]
	mov	r8, [rax + 4 * r8]
	mov	r8, [r8 + 64]

	jmp	short .Lmain_\name
	jmp	.Lmain_\name
.type \name, %function
.size \name, .-\name
.endm

.macro GENERATE_LOOKUP_SUPER name lookup
\name:
	mov	r8, rdi
	mov	rdi, [rdi]
	test	rdi, rdi
	jz	short .LreturnNilMethod
	jz	.LreturnNilMethod

	mov	r8, [r8 + 8]
	mov	r8, [r8 + 64]
	jmp	short .Lmain_\lookup
	jmp	.Lmain_\lookup
.type \name, %function
.size \name, .-\name
.endm

GENERATE_LOOKUP objc_msg_lookup objc_methodNotFound
GENERATE_LOOKUP objc_msg_lookup_stret objc_methodNotFound_stret
GENERATE_LOOKUP_SUPER objc_msg_lookup_super objc_msg_lookup
︙

Modified src/runtime/lookup-asm/lookup-asm-amd64-win64.S from [2fecd29e3d] to [aebc3c4fb2].

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.globl objc_msg_lookup_super
.globl objc_msg_lookup_super_stret

.section .text
.macro GENERATE_LOOKUP name notFound
\name:
	test	rcx, rcx
	jz	short .LreturnNilMethod
	jz	.LreturnNilMethod

	test	cl, 1
	jnz	short .LtaggedPointer_\name
	jnz	.LtaggedPointer_\name

	mov	r8, [rcx]
	mov	r8, [r8 + 56]

.Lmain_\name:
	mov	r10, rcx
	mov	r11, rdx

	mov	rax, [rdx]
	movzx	ecx, ah
	movzx	edx, al
#ifdef OF_SELUID24
	shr	eax, 16

	mov	r8, [r8 + 8 * rax]
#endif
	mov	r8, [r8 + 8 * rcx]
	mov	rax, [r8 + 8 * rdx]

	test	rax, rax
	jz	short 0f
	jz	0f

	ret

0:
	mov	rcx, r10
	mov	rdx, r11
	jmp	short \notFound
	jmp	\notFound

.LtaggedPointer_\name:
	xor	rcx, [rip + objc_taggedPointerSecret]
	and	cl, 0xE
	movzx	r8d, cl

	lea	rax, [rip + objc_taggedPointerClasses]
	mov	r8, [rax + 4 * r8]
	mov	r8, [r8 + 56]

	jmp	short .Lmain_\name
	jmp	.Lmain_\name
.def \name
.scl 2
.type 32
.endef
.endm

.macro GENERATE_LOOKUP_SUPER name lookup
︙

Modified src/runtime/lookup-asm/lookup-asm-x86-elf.S from [cd6507b46d] to [657ef9388f].

︙
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.globl objc_msg_lookup_super_stret

.section .text
.macro GENERATE_LOOKUP name notFound
\name:
	mov	edx, [esp + 4]
	test	edx, edx
	jz	short .LreturnNilMethod
	jz	.LreturnNilMethod

	test	dl, 1
	jnz	short .LtaggedPointer_\name
	jnz	.LtaggedPointer_\name

	mov	edx, [edx]
	mov	edx, [edx + 32]

.Lmain_\name:
	mov	eax, [esp + 8]

#ifdef OF_SELUID24
	movzx	ecx, byte ptr [eax + 2]
	mov	edx, [edx + 4 * ecx]
#endif
	movzx	ecx, byte ptr [eax + 1]
	mov	edx, [edx + 4 * ecx]
	movzx	ecx, byte ptr [eax]
	mov	eax, [edx + 4 * ecx]

	test	eax, eax
	jz	short 0f
	jz	0f

	ret

0:
	call	.LgetEIP
	add	eax, offset _GLOBAL_OFFSET_TABLE_
	mov	eax, [eax + \notFound@GOT]
︙
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	and	dl, 0xE
	movzx	edx, dl

	mov	eax, [eax + objc_taggedPointerClasses@GOT]
	mov	edx, [eax + 2 * edx]
	mov	edx, [edx + 32]

	jmp	short .Lmain_\name
	jmp	.Lmain_\name
.type \name, %function
.size \name, .-\name
.endm

.macro GENERATE_LOOKUP_SUPER name lookup
\name:
	mov	edx, [esp + 4]
	mov	eax, [edx]
	test	eax, eax
	jz	short .LreturnNilMethod
	jz	.LreturnNilMethod

	mov	[esp + 4], eax
	mov	edx, [edx + 4]
	mov	edx, [edx + 32]
	jmp	short .Lmain_\lookup
	jmp	.Lmain_\lookup
.type \name, %function
.size \name, .-\name
.endm

GENERATE_LOOKUP objc_msg_lookup objc_methodNotFound
GENERATE_LOOKUP objc_msg_lookup_stret objc_methodNotFound_stret
GENERATE_LOOKUP_SUPER objc_msg_lookup_super objc_msg_lookup
︙

Modified src/runtime/lookup-asm/lookup-asm-x86-win32.S from [d9ae57eae0] to [8858e35bdf].

︙
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.globl _objc_msg_lookup_super_stret

.section .text
.macro GENERATE_LOOKUP name notFound
\name:
	mov	edx, [esp + 4]
	test	edx, edx
	jz	short .LreturnNilMethod
	jz	.LreturnNilMethod

	test	dl, 1
	jnz	short .LtaggedPointer_\name
	jnz	.LtaggedPointer_\name

	mov	edx, [edx]
	mov	edx, [edx + 32]

.Lmain_\name:
	mov	eax, [esp + 8]

#ifdef OF_SELUID24
	movzx	ecx, byte ptr [eax + 2]
	mov	edx, [edx + 4 * ecx]
#endif
	movzx	ecx, byte ptr [eax + 1]
	mov	edx, [edx + 4 * ecx]
	movzx	ecx, byte ptr [eax]
	mov	eax, [edx + 4 * ecx]

	test	eax, eax
	jz	short \notFound
	jz	\notFound

	ret

.LtaggedPointer_\name:
	xor	edx, _objc_taggedPointerSecret
	and	dl, 0xE
	movzx	edx, dl

	mov	edx, [_objc_taggedPointerClasses + 2 * edx]
	mov	edx, [edx + 32]

	jmp	short .Lmain_\name
	jmp	.Lmain_\name
.def \name
.scl 2
.type 32
.endef
.endm

.macro GENERATE_LOOKUP_SUPER name lookup
\name:
	mov	edx, [esp + 4]
	mov	eax, [edx]
	test	eax, eax
	jz	short .LreturnNilMethod
	jz	.LreturnNilMethod

	mov	[esp + 4], eax
	mov	edx, [edx  + 4]
	mov	edx, [edx + 4]
	mov	edx, [edx + 32]
	jmp	short .Lmain_\lookup
	jmp	.Lmain_\lookup
.def \name
.scl 2
.type 32
.endef
.endm

GENERATE_LOOKUP _objc_msg_lookup _objc_methodNotFound
︙

Fossil 2.23 [47362306a7] 2023-11-01 18:56:47
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