// and accept the same constants.
	MOVW $2147483648, R5            // 64058000
	MOVWZ $-2147483648, R5          // 3ca08000

	// TODO: These are preprocessed by the assembler into MOVD $const>>shift, R5; SLD $shift, R5.
	//       This only captures the MOVD. Should the SLD be appended to the encoding by the test?
	// Hex constant 0x20004000000
	MOVD $2199090364416, R5         // 60058001
	// Hex constant 0xFFFFFE0004000000

				writeErrorResponse(r.Context(), w, errorCodes.ToAPIErr(errCode), r.URL)
				atomic.AddUint64(&globalHTTPStats.rejectedRequestsTime, 1)
				return
			}
			// Verify if the request date header is shifted by less than globalMaxSkewTime parameter in the past
			// or in the future, reject request otherwise.
			curTime := UTCNow()
			if curTime.Sub(amzDate) > globalMaxSkewTime || amzDate.Sub(curTime) > globalMaxSkewTime {

		// local character encoding. Most encoding are compatible with a large
		// subset of CP-437, which itself is ASCII-like.
		//
		// Forbid 0x7e and 0x5c since EUC-KR and Shift-JIS replace those
		// characters with localized currency and overline characters.
		if r < 0x20 || r > 0x7d || r == 0x5c {
			if !utf8.ValidRune(r) || (r == utf8.RuneError && size == 1) {
				return false, false
			}

But then, the project's focus shifted.

It was no longer an API web framework, as the creator needed to focus on Starlette.

Now APIStar is a set of tools to validate OpenAPI specifications, not a web framework.

/// info

	ORW	(R1), R2              // 56201000
	ORW	-1(R1), R2            // e3201fffff56
	XOR	(R1), R2              // e32010000082
	XORW	(R1), R2              // 57201000
	XORW	-1(R1), R2            // e3201fffff57

	// shift and rotate instructions
	SRD	$4, R4, R7              // eb740004000c
	SRD	R1, R4, R7              // eb741000000c
	SRW	$4, R4, R7              // eb74000400de
	SRW	R1, R4, R7              // eb74100000de

     * looking for a way to improve perfomance this is precisly what you
     * would want to do as the jcifs.netbios.SocketXxxputStream classes
     * arraycopy all data read or written into a new buffer shifted over 4!)
     */

    private byte command, flags;
    /**
     * Starting position of the SMB header in the buffer.
     */
    protected int headerStart;
    /**

	SLL	R5, R6, R7           // 1675a0e1
	SLL.S	R5, R6, R7           // 1675b0e1
	SLL	R5, R7               // 1775a0e1
	SLL.S	R5, R7               // 1775b0e1

// Ops with zero shifts should encode as left shifts
	ADD	R0<<0, R1, R2	     // 002081e0
	ADD	R0>>0, R1, R2	     // 002081e0
	ADD	R0->0, R1, R2	     // 002081e0
	ADD	R0@>0, R1, R2	     // 002081e0
	MOVW	R0<<0(R1), R2        // 002091e7

		// Some ZIP writers use UTF-8 encoding without setting the UTF-8 flag.
		// Since it is impossible to always distinguish valid UTF-8 from some
		// other encoding (e.g., GBK or Shift-JIS), we trust the flag.
		f.NonUTF8 = f.Flags&0x800 == 0
	}

	needUSize := f.UncompressedSize == ^uint32(0)
	needCSize := f.CompressedSize == ^uint32(0)
	needHeaderOffset := f.headerOffset == int64(^uint32(0))

		b := w.AvailableBuffer()
		if w.Available() != cap(b) {
			t.Fatalf("Available() = %v, want %v", w.Available(), cap(b))
		}

		// While not recommended, it is valid to append to a shifted buffer.
		// This forces Write to copy the input.
		if rn.Intn(8) == 0 && cap(b) > 0 {
			b = b[1:1:cap(b)]
		}

		// Append a random integer of varying width.
		n := int64(rn.Intn(1 << rn.Intn(30)))

	FMOVD	0x1000000(R1), F2	// FMOVD	16777216(R1), F2
	FMOVD	0x44332211(R1), F2	// FMOVD	1144201745(R1), F2
	FMOVQ	0x1000000(R1), F2	// FMOVQ	16777216(R1), F2
	FMOVQ	0x44332211(R1), F2	// FMOVQ	1144201745(R1), F2

// shifted or extended register offset.
	MOVD	(R2)(R6.SXTW), R4               // 44c866f8
	MOVD	(R3)(R6), R5                    // 656866f8
	MOVD	(R3)(R6*1), R5                  // 656866f8