# disable cgo: no C compiler anymore (unless the baked-in defaultCC is an
# absolute path and exists.
env CC=
env PATH=$GOROOT/bin
go env CGO_ENABLED
[!abscc] stdout 0
[abscc] stdout 1

# Setting CC should re-enable cgo.
env CC=cc
go env CGO_ENABLED
stdout 1

# So should setting CGO_ENABLED.
env CC=
env CGO_ENABLED=1
go env CGO_ENABLED

# no longer installed anyway! Since we're requiring a C compiler in order to
# build and use cgo libraries in the standard library, we should make sure it
# matches what's in the cache.

[abscc] stop

env CGO_ENABLED=1
env CC=''
[!GOOS:plan9] env PATH=''  # Guaranteed not to include $(go env CC)!
[GOOS:plan9] env path=''
! go build -x runtime/cgo

		}
		conds[name] = cond
	}

	lazyBool := func(summary string, f func() bool) script.Cond {
		return script.OnceCondition(summary, func() (bool, error) { return f(), nil })
	}

	add("abscc", script.Condition("default $CC path is absolute and exists", defaultCCIsAbsolute))
	add("asan", sysCondition("-asan", platform.ASanSupported, true))

The available conditions are:
[GOARCH:*]
	runtime.GOARCH == <suffix>
[GODEBUG:*]
	GODEBUG contains <suffix>
[GOEXPERIMENT:*]
	GOEXPERIMENT <suffix> is enabled
[GOOS:*]
	runtime.GOOS == <suffix>
[abscc]
	default $CC path is absolute and exists
[asan]
	GOOS/GOARCH supports -asan
[buildmode:*]
	go supports -buildmode=<suffix>
[case-sensitive]
	$WORK filesystem is case-sensitive
[cc:*]

	"DIVWV",
	"DIVWU",
	"DIVWUCC",
	"DIVWUVCC",
	"DIVWUV",
	"MODUD",
	"MODUW",
	"MODSD",
	"MODSW",
	"EQV",
	"EQVCC",
	"EXTSB",
	"EXTSBCC",
	"EXTSH",
	"EXTSHCC",
	"FABS",
	"FABSCC",
	"FADD",
	"FADDCC",
	"FADDS",
	"FADDSCC",
	"FCMPO",
	"FCMPU",
	"FCTIW",
	"FCTIWCC",
	"FCTIWZ",
	"FCTIWZCC",
	"FDIV",
	"FDIVCC",
	"FDIVS",
	"FDIVSCC",
	"FMADD",
	"FMADDCC",

	case arm.AMULA, arm.AMULS, arm.AMMULA, arm.AMMULS, arm.AMULABB, arm.AMULAWB, arm.AMULAWT:
		return true
	}
	return false
}

var bcode = []obj.As{
	arm.ABEQ,
	arm.ABNE,
	arm.ABCS,
	arm.ABCC,
	arm.ABMI,
	arm.ABPL,
	arm.ABVS,
	arm.ABVC,
	arm.ABHI,
	arm.ABLS,
	arm.ABGE,
	arm.ABLT,
	arm.ABGT,
	arm.ABLE,
	arm.AB,
	obj.ANOP,
}

	ACMP
	ACMN
	AORR
	ABIC

	AMVN

	/*
	 * Do not reorder or fragment the conditional branch
	 * opcodes, or the predication code will break
	 */
	ABEQ
	ABNE
	ABCS
	ABHS
	ABCC
	ABLO
	ABMI
	ABPL
	ABVS
	ABVC
	ABHI
	ABLS
	ABGE
	ABLT
	ABGT
	ABLE

	AMOVWD
	AMOVWF
	AMOVDW
	AMOVFW
	AMOVFD
	AMOVDF
	AMOVF
	AMOVD

	ACMPF

BE	ab*bc			abc		(0,3)
BE	ab*bc			abbc		(0,4)
BE	ab*bc			abbbbc		(0,6)
E	ab+bc			abbc		(0,4)
E	ab+bc			abbbbc		(0,6)
E	ab?bc			abbc		(0,4)
E	ab?bc			abc		(0,3)
E	ab?c			abc		(0,3)
BE	^abc$			abc		(0,3)
BE	^abc			abcc		(0,3)
BE	abc$			aabc		(1,4)
BE	^			abc		(0,0)
BE	$			abc		(3,3)
BE	a.c			abc		(0,3)
BE	a.c			axc		(0,3)
BE	a.*c			axyzc		(0,5)
BE	a[bc]d			abd		(0,3)
BE	a[b-d]e			ace		(0,3)
BE	a[b-d]			aac		(1,3)

		if f := Abs(vc[i]); !veryclose(abs[i], f) {
			t.Errorf("Abs(%g) = %g, want %g", vc[i], f, abs[i])
		}
	}
	for i := 0; i < len(vcAbsSC); i++ {
		if f := Abs(vcAbsSC[i]); !alike(absSC[i], f) {
			t.Errorf("Abs(%g) = %g, want %g", vcAbsSC[i], f, absSC[i])
		}
	}
}
func TestAcos(t *testing.T) {
	for i := 0; i < len(vc); i++ {
		if f := Acos(vc[i]); !cSoclose(acos[i], f, 1e-14) {

	FABS F1, F2                     // fc400a10
	FNABS F1, F2                    // fc400910
	FABSCC F1, F2                   // fc400a11
	FNABSCC F1, F2                  // fc400911
	FNEG F1, F2                     // fc400850
	FNEGCC F1, F2                   // fc400851
	FABSCC F1, F2                   // fc400a11
	FRSP F1, F2                     // fc400818
	FRSPCC F1, F2                   // fc400819