vlop.s

著名操作系统Plan 9的第三版的部分核心源代码。现在很难找到了。Plan 9是bell实验室开发的Unix后继者。

TEXT	_mulv(SB), $0
	MOVL	r+0(FP), CX
	MOVL	a+4(FP), AX
	MULL	b+12(FP)
	MOVL	AX, 0(CX)
	MOVL	DX, BX
	MOVL	a+4(FP), AX
	MULL	b+16(FP)
	ADDL	AX, BX
	MOVL	a+8(FP), AX
	MULL	b+12(FP)
	ADDL	AX, BX
	MOVL	BX, 4(CX)
	RET

TEXT	_mul64by32(SB), $0
	MOVL	r+0(FP), CX
	MOVL	a+4(FP), AX
	MULL	b+12(FP)
	MOVL	AX, 0(CX)
	MOVL	DX, BX
	MOVL	a+8(FP), AX
	MULL	b+12(FP)
	ADDL	AX, BX
	MOVL	BX, 4(CX)
	RET

TEXT	_div64by32(SB), $0
	MOVL	r+12(FP), CX
	MOVL	a+0(FP), AX
	MOVL	a+4(FP), DX
	DIVL	b+8(FP)
	MOVL	DX, 0(CX)
	RET

TEXT	_addv(SB), $0
	MOVL	r+0(FP), CX
	MOVL	a+4(FP), AX
	MOVL	a+8(FP), BX
	ADDL	b+12(FP), AX
	ADCL	b+16(FP), BX
	MOVL	AX, 0(CX)
	MOVL	BX, 4(CX)
	RET