RORL	$19, CX; \
	SHRL	$10, DX; \
	MOVL	((index-15)*4)(BP), BX; \
	XORL	CX, AX; \
	MOVL	BX, CX; \
	XORL	DX, AX; \
	RORL	$7, BX; \
	MOVL	CX, DX; \
	SHRL	$3, DX; \
	RORL	$18, CX; \
	ADDL	((index-7)*4)(BP), AX; \
	XORL	CX, BX; \
	XORL	DX, BX; \
	ADDL	((index-16)*4)(BP), BX; \
	ADDL	BX, AX; \
	MOVL	AX, ((index)*4)(BP)

// Calculate T1 in AX - uses AX, BX, CX and DX registers.
// Wt is passed in AX.

	MOVL	BX, bx-4(SP)
	MOVL	BP, bp-8(SP)
	MOVL	SI, si-12(SP)
	MOVL	DI, di-16(SP)
	// We don't save mxcsr or the x87 control word because sigtrampgo doesn't
	// modify them.

	MOVL	32(SP), BX // signo
	MOVL	BX, 0(SP)
	MOVL	36(SP), BX // info
	MOVL	BX, 4(SP)
	MOVL	40(SP), BX // context
	MOVL	BX, 8(SP)
	CALL	runtime·sigtrampgo(SB)

	MOVL	di-16(SP), DI

	// DI SI BP BX are preserved, SP is not
	CALL	libcall_fn(BX)
	MOVL	BP, SP

	// Return result.
	MOVL	fn+0(FP), BX
	MOVL	AX, libcall_r1(BX)
	MOVL	DX, libcall_r2(BX)

	// GetLastError().
	MOVL	0x34(FS), AX
	MOVL	AX, libcall_err(BX)

	RET

// faster get/set last error
TEXT runtime·getlasterror(SB),NOSPLIT,$0
	MOVL	0x34(FS), AX
	MOVL	AX, ret+0(FP)
	RET

	MOVL	BX, bx-4(SP)
	MOVL	BP, bp-8(SP)
	MOVL	SI, si-12(SP)
	MOVL	DI, di-16(SP)
	// We don't save mxcsr or the x87 control word because sigtrampgo doesn't
	// modify them.

	MOVL	32(SP), BX // signo
	MOVL	BX, 0(SP)
	MOVL	36(SP), BX // info
	MOVL	BX, 4(SP)
	MOVL	40(SP), BX // context
	MOVL	BX, 8(SP)
	CALL	runtime·sigtrampgo(SB)

	MOVL	di-16(SP), DI

	// AX = a    (want in SI)
	// BX = b    (want in DI)
	// CX = size (want in BX)
	CMPQ	AX, BX
	JNE	neq
	MOVQ	$1, AX	// return 1
	RET
neq:
	MOVQ	AX, SI
	MOVQ	BX, DI
	MOVQ	CX, BX
	JMP	memeqbody<>(SB)

// memequal_varlen(a, b unsafe.Pointer) bool
TEXT runtime·memequal_varlen<ABIInternal>(SB),NOSPLIT,$0-17
	// AX = a       (want in SI)
	// BX = b       (want in DI)
	// 8(DX) = size (want in BX)

	QR(X2, X7, X8, X13, X15)
	QR(X3, X4, X9, X14, X15)

	DECL DX
	JNZ loop

	// Store interlaced blocks back to output buffer,
	// adding original seed along the way.

	// First the top and bottom rows.
	MOVOU X0, (0*16)(BX)
	MOVOU X1, (1*16)(BX)
	MOVOU X2, (2*16)(BX)
	MOVOU X3, (3*16)(BX)
	MOVOU X12, (12*16)(BX)
	MOVOU X13, (13*16)(BX)
	MOVOU X14, (14*16)(BX)

TEXT runtime·sigtramp(SB),NOSPLIT|NOFRAME,$0
	get_tls(AX)

	// check that g exists
	MOVQ	g(AX), BX
	CMPQ	BX, $0
	JNE	3(PC)
	CALL	runtime·badsignal2(SB) // will exit
	RET

	// save args
	MOVQ	ureg+0(FP), CX
	MOVQ	note+8(FP), DX

	// change stack
	MOVQ	g_m(BX), BX
	MOVQ	m_gsignal(BX), R10
	MOVQ	(g_stack+stack_hi)(R10), BP
	MOVQ	BP, SP

	// make room for args and g
	SUBQ	$128, SP

	// Finally, initialize g.
	get_tls(BX)
	MOVL	DX, g(BX)

	CALL	runtime·stackcheck(SB)	// smashes AX, CX
	CALL	runtime·mstart(SB)

	// Exit the thread.
	MOVL	$0, 0(SP)
	CALL	runtime·exits(SB)
	JMP	0(PC)

// void sigtramp(void *ureg, int8 *note)
TEXT runtime·sigtramp(SB),NOSPLIT,$0
	get_tls(AX)

	// check that g exists
	MOVL	g(AX), BX
	CMPL	BX, $0
	JNE	3(PC)

		p.Succs[e.i] = Edge{c, i}
	}
	f := b.Func
	if f.Entry == b {
		f.Entry = c
	}

	// trash b's fields, just in case
	for bx := b; bx != c; bx = b_next {
		b_next = bx.Succs[0].b

		bx.Kind = BlockInvalid
		bx.Values = nil
		bx.Preds = nil
		bx.Succs = nil
	}
	return true

"\\bx\\b"
-;-;-;-
-;-;-;-
"^(?:\\bx\\b)$"
-;-;-;-
-;-;-;-
"^(?:\\bx\\b)"
-;-;-;-
-;-;-;-
"(?:\\bx\\b)$"
-;-;-;-
-;-;-;-
strings
""
"áxβ"
regexps
"\\bx\\b"
-;-;-;-
-;2-3;-;2-3
"^(?:\\bx\\b)$"
-;-;-;-
-;-;-;-
"^(?:\\bx\\b)"
-;-;-;-
-;-;-;-
"(?:\\bx\\b)$"
-;-;-;-
-;-;-;-
strings
""
"axb"
regexps
"\\Bx\\B"