GLOBL	·alignPcFnAddr(SB),RODATA,$8
DATA	·alignPcFnAddr(SB)/8,$·alignPc(SB)
`,
	"loong64": `
#include "textflag.h"

TEXT	·alignPc(SB),NOSPLIT, $0-0
	MOVV	$2, R4
	PCALIGN	$512
	MOVV	$3, R5
	RET

GLOBL	·alignPcFnAddr(SB),RODATA,$8
DATA	·alignPcFnAddr(SB)/8,$·alignPc(SB)
`,
}

// TestFuncAlign verifies that the address of a function can be aligned
// with a specific value on arm64 and loong64.

// Callee-saved registers are: R19...R28.
// Temporary registers are: R9...R15
// SP must be 16-byte aligned.

// When calling racecalladdr, R9 is the call target address.

// The race ctx, ThreadState *thr below, is passed in R0 and loaded in racecalladdr.

// Darwin may return unaligned thread pointer. Align it. (See tls_arm64.s)
// No-op on other OSes.
#ifdef TLS_darwin
#define TP_ALIGN	AND	$~7, R0
#else

	if align != 0 {
		if align&(align-1) != 0 {
			throw("persistentalloc: align is not a power of 2")
		}
		if align > _PageSize {
			throw("persistentalloc: align is too large")
		}
	} else {
		align = 8
	}

	if size >= maxBlock {
		return (*notInHeap)(sysAlloc(size, sysStat))
	}

	mp := acquirem()
	var persistent *persistentAlloc
	if mp != nil && mp.p != 0 {

// atomic functions (types [Int64] and [Uint64] are automatically aligned).
// The first word in an allocated struct, array, or slice; in a global
// variable; or in a local variable (because the subject of all atomic operations
// will escape to the heap) can be relied upon to be 64-bit aligned.

// SwapInt32 atomically stores new into *addr and returns the previous *addr value.

rtical-align":"middle"},".align-bottom":{"vertical-align":"bottom"},".align-text-top":{"vertical-align":"text-top"},".align-text-bottom":{"vertical-align":"text-bottom"},".align-sub":{"vertical-align":"sub"},".align-super":{"vertical-align":"super"}}),e({align:t=>({"vertical-align":t})})},fontFamily:({matchUtilities:i,theme:e})=>{i({font:t=>{let[r,n={}]=Array.isArray(t)&&ie(t[1])?t:[t],{fontFeatureSettings:a,fontVariationSettings:s}=n;return{"font-family":Array.isArray(r)?r.join(", "):r,...a===void...

		})
		return closer.Close()
	}
	return nil
}

func (b *streamingBitrotReader) ReadAt(buf []byte, offset int64) (int, error) {
	var err error
	if offset%b.shardSize != 0 {
		// Offset should always be aligned to b.shardSize
		// Can never happen unless there are programmer bugs
		return 0, errUnexpected
	}
	if b.rc == nil {
		// For the first ReadAt() call we need to open the stream for reading.
		b.currOffset = offset

// Arguments are passed in DI, SI, DX, CX, R8, R9, the rest is on stack.
// Callee-saved registers are: BX, BP, R12-R15.
// SP must be 16-byte aligned.
// On Windows:
// Arguments are passed in CX, DX, R8, R9, the rest is on stack.
// Callee-saved registers are: BX, BP, DI, SI, R12-R15.
// SP must be 16-byte aligned. Windows also requires "stack-backing" for the 4 register arguments:
// https://learn.microsoft.com/en-us/cpp/build/x64-calling-convention

		// we don't want to do it every time. But if _stext happens to be
		// page-aligned but isn't the same as Vaddr, we would symbolize
		// wrong. So if the name the addresses aren't page aligned, or if
		// the name is "vmlinux" we read _stext. We can be wrong if: (1)
		// someone passes a kernel path that doesn't contain "vmlinux" AND
		// (2) _stext is page-aligned AND (3) _stext is not at Vaddr
		symbols, err := ef.Symbols()

	}
}

// Expand 48-bit input to 64-bit, with each 6-bit block padded by extra two bits at the top.
// By doing so, we can have the input blocks (four bits each), and the key blocks (six bits each) well-aligned without
// extra shifts/rotations for alignments.
func unpack(x uint64) uint64 {
	return ((x>>(6*1))&0xff)<<(8*0) |
		((x>>(6*3))&0xff)<<(8*1) |
		((x>>(6*5))&0xff)<<(8*2) |
		((x>>(6*7))&0xff)<<(8*3) |

// the runtime mapping with file offset mapOff and memory size mapSz. We skip
// over segments zero file size because their file offset values are unreliable.
// Even if overlapping, a segment is not selected if its aligned file offset is
// greater than the mapping file offset, or if the mapping includes the last
// page of the segment, but not the full segment and the mapping includes
// additional pages after the segment end.