// See https://golang.org/issue/45170.
		return true
	case "ios", "dragonfly", "netbsd", "illumos", "solaris":
		// See https://golang.org/issue/13841.
		return true
	case "openbsd":
		if runtime.GOARCH == "arm" || runtime.GOARCH == "arm64" {
			// See https://golang.org/issue/13841.
			return true
		}
	}

	return false
}

		exp = (exp << 2) + (((x >> 16) & 1) << 1) + ((x >> 9) & 1)
		s := ((x >> 18) & 1)
		return Imm_fp{uint8(s), int8(exp) - 3, uint8(pre)}

	case arg_immediate_exp_3_pre_4_imm8:
		pre := (x >> 13) & (1<<4 - 1)
		exp := 1 - ((x >> 19) & 1)
		exp = (exp << 2) + ((x >> 17) & (1<<2 - 1))
		s := ((x >> 20) & 1)
		return Imm_fp{uint8(s), int8(exp) - 3, uint8(pre)}

//
//   twos_complement_eval z = let x1 := z[0] + (z[1] << 64) + (z[2] << 128) + (z[3] << 192) + (z[4] << 256) + (z[5] << 0x140) in
//
//                            if x1 & (2^384-1) < 2^383 then x1 & (2^384-1) else (x1 & (2^384-1)) - 2^384

package fiat

import "math/bits"