From c33289238e8e48f8163a3a9f44979975ad068a6b Mon Sep 17 00:00:00 2001
From: Rob Pike <r@golang.org>
Date: Mon, 1 Nov 2010 17:49:06 -0700
Subject: [PATCH] test/ken/convert.go: add conversion torture test (written by
 ken)

R=ken2
CC=golang-dev
https://golang.org/cl/2823042
---
 test/ken/convert.go | 431 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 431 insertions(+)
 create mode 100644 test/ken/convert.go

diff --git a/test/ken/convert.go b/test/ken/convert.go
new file mode 100644
index 00000000000..3780ec886a4
--- /dev/null
+++ b/test/ken/convert.go
@@ -0,0 +1,431 @@
+// $G $D/$F.go && $L $F.$A && ./$A.out
+
+// Copyright 2010 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// near-exhaustive test of converting numbers between types.
+
+package main
+
+var i8 int8;
+var u8 uint8;
+var i16 int16;
+var u16 uint16;
+var i32 int32;
+var u32 uint32;
+var i64 int64;
+var u64 uint64;
+var f32 float32;
+var f64 float64;
+
+type	big	float64
+
+type	t	struct {
+	from, to	int
+	val		big
+}
+
+const (
+	ti8	= iota+1
+	tu8
+	ti16
+	tu16
+	ti32
+	tu32
+	ti64
+	tu64
+	tf32
+	tf64
+)
+
+var	x = []t{
+
+	/* value good in all types (10) */
+	{ ti8,  ti8,  10 }, { ti8,  tu8,  10 }, { ti8,  ti16, 10 }, { ti8,  tu16, 10 },
+	{ ti8,  ti32, 10 }, { ti8,  tu32, 10 }, { ti8,  ti64, 10 }, { ti8,  tu64, 10 },
+	{ ti8,  tf32, 10 }, { ti8,  tf64, 10 },
+
+	{ tu8,  ti8,  10 }, { tu8,  tu8,  10 }, { tu8,  ti16, 10 }, { tu8,  tu16, 10 },
+	{ tu8,  ti32, 10 }, { tu8,  tu32, 10 }, { tu8,  ti64, 10 }, { tu8,  tu64, 10 },
+	{ tu8,  tf32, 10 }, { tu8,  tf64, 10 },
+
+	{ ti16, ti8,  10 }, { ti16, tu8,  10 }, { ti16, ti16, 10 }, { ti16, tu16, 10 },
+	{ ti16, ti32, 10 }, { ti16, tu32, 10 }, { ti16, ti64, 10 }, { ti16, tu64, 10 },
+	{ ti16, tf32, 10 }, { ti16, tf64, 10 },
+
+	{ tu16, ti8,  10 }, { tu16, tu8,  10 }, { tu16, ti16, 10 }, { tu16, tu16, 10 },
+	{ tu16, ti32, 10 }, { tu16, tu32, 10 }, { tu16, ti64, 10 }, { tu16, tu64, 10 },
+	{ tu16, tf32, 10 }, { tu16, tf64, 10 },
+
+	{ ti32, ti8,  10 }, { ti32, tu8,  10 }, { ti32, ti16, 10 }, { ti32, tu16, 10 },
+	{ ti32, ti32, 10 }, { ti32, tu32, 10 }, { ti32, ti64, 10 }, { ti32, tu64, 10 },
+	{ ti32, tf32, 10 }, { ti32, tf64, 10 },
+
+	{ tu32, ti8,  10 }, { tu32, tu8,  10 }, { tu32, ti16, 10 }, { tu32, tu16, 10 },
+	{ tu32, ti32, 10 }, { tu32, tu32, 10 }, { tu32, ti64, 10 }, { tu32, tu64, 10 },
+	{ tu32, tf32, 10 }, { tu32, tf64, 10 },
+
+	{ ti64, ti8,  10 }, { ti64, tu8,  10 }, { ti64, ti16, 10 }, { ti64, tu16, 10 },
+	{ ti64, ti32, 10 }, { ti64, tu32, 10 }, { ti64, ti64, 10 }, { ti64, tu64, 10 },
+	{ ti64, tf32, 10 }, { ti64, tf64, 10 },
+
+	{ tu64, ti8,  10 }, { tu64, tu8,  10 }, { tu64, ti16, 10 }, { tu64, tu16, 10 },
+	{ tu64, ti32, 10 }, { tu64, tu32, 10 }, { tu64, ti64, 10 }, { tu64, tu64, 10 },
+	{ tu64, tf32, 10 }, { tu64, tf64, 10 },
+
+	{ tf32, ti8,  10 }, { tf32, tu8,  10 }, { tf32, ti16, 10 }, { tf32, tu16, 10 },
+	{ tf32, ti32, 10 }, { tf32, tu32, 10 }, { tf32, ti64, 10 }, { tf32, tu64, 10 },
+	{ tf32, tf32, 10 }, { tf32, tf64, 10 },
+
+	{ tf64, ti8,  10 }, { tf64, tu8,  10 }, { tf64, ti16, 10 }, { tf64, tu16, 10 },
+	{ tf64, ti32, 10 }, { tf64, tu32, 10 }, { tf64, ti64, 10 }, { tf64, tu64, 10 },
+	{ tf64, tf32, 10 }, { tf64, tf64, 10 },
+
+	/* value good in all signed types (-4) */
+	{ ti8,  ti8,  -4 }, { ti8,  ti16, -4 },
+	{ ti8,  ti32, -4 }, { ti8,  ti64, -4 },
+	{ ti8,  tf32, -4 }, { ti8,  tf64, -4 },
+
+	{ ti16, ti8,  -4 }, { ti16, ti16, -4 },
+	{ ti16, ti32, -4 }, { ti16, ti64, -4 },
+	{ ti16, tf32, -4 },
+
+	{ ti32, ti8,  -4 }, { ti32, ti16, -4 },
+	{ ti32, ti32, -4 }, { ti32, ti64, -4 },
+	{ ti32, tf32, -4 }, { ti32, tf64, -4 },
+
+	{ ti64, ti8,  -4 }, { ti64, ti16, -4 },
+	{ ti64, ti32, -4 }, { ti64, ti64, -4 },
+	{ ti64, tf32, -4 },
+
+	{ tf32, ti8,  -4 }, { tf32, ti16, -4 },
+	{ tf32, ti32, -4 }, { tf32, ti64, -4 },
+	{ tf32, tf32, -4 },
+
+	{ tf64, ti8,  -4 }, { tf64, ti16, -4 },
+	{ tf64, ti32, -4 }, { tf64, ti64, -4 },
+	{ tf64, tf32, -4 }, { tf64, tf64, -4 },
+
+	/* value good in u8 and up (175) */
+	{ tu8,  tu8,  175 }, { tu8,  ti16, 175 }, { tu8,  tu16, 175 },
+	{ tu8,  ti32, 175 }, { tu8,  tu32, 175 }, { tu8,  ti64, 175 }, { tu8,  tu64, 175 },
+	{ tu8,  tf32, 175 }, { tu8,  tf64, 175 },
+
+	{ ti16, tu8,  175 }, { ti16, ti16, 175 }, { ti16, tu16, 175 },
+	{ ti16, ti32, 175 }, { ti16, tu32, 175 }, { ti16, ti64, 175 }, { ti16, tu64, 175 },
+	{ ti16, tf32, 175 }, { ti16, tf64, 175 },
+
+	{ tu16, tu8,  175 }, { tu16, ti16, 175 }, { tu16, tu16, 175 },
+	{ tu16, ti32, 175 }, { tu16, tu32, 175 }, { tu16, ti64, 175 }, { tu16, tu64, 175 },
+	{ tu16, tf32, 175 }, { tu16, tf64, 175 },
+
+	{ ti32, tu8,  175 }, { ti32, ti16, 175 }, { ti32, tu16, 175 },
+	{ ti32, ti32, 175 }, { ti32, tu32, 175 }, { ti32, ti64, 175 }, { ti32, tu64, 175 },
+	{ ti32, tf32, 175 }, { ti32, tf64, 175 },
+
+	{ tu32, tu8,  175 }, { tu32, ti16, 175 }, { tu32, tu16, 175 },
+	{ tu32, ti32, 175 }, { tu32, tu32, 175 }, { tu32, ti64, 175 }, { tu32, tu64, 175 },
+	{ tu32, tf32, 175 }, { tu32, tf64, 175 },
+
+	{ ti64, tu8,  175 }, { ti64, ti16, 175 }, { ti64, tu16, 175 },
+	{ ti64, ti32, 175 }, { ti64, tu32, 175 }, { ti64, ti64, 175 }, { ti64, tu64, 175 },
+	{ ti64, tf32, 175 }, { ti64, tf64, 175 },
+
+	{ tu64, tu8,  175 }, { tu64, ti16, 175 }, { tu64, tu16, 175 },
+	{ tu64, ti32, 175 }, { tu64, tu32, 175 }, { tu64, ti64, 175 }, { tu64, tu64, 175 },
+	{ tu64, tf32, 175 }, { tu64, tf64, 175 },
+
+	{ tf32, tu8,  175 }, { tf32, ti16, 175 }, { tf32, tu16, 175 },
+	{ tf32, ti32, 175 }, { tf32, tu32, 175 }, { tf32, ti64, 175 }, { tf32, tu64, 175 },
+	{ tf32, tf32, 175 }, { tf32, tf64, 175 },
+
+	{ tf64, tu8,  175 }, { tf64, ti16, 175 }, { tf64, tu16, 175 },
+	{ tf64, ti32, 175 }, { tf64, tu32, 175 }, { tf64, ti64, 175 }, { tf64, tu64, 175 },
+	{ tf64, tf32, 175 }, { tf64, tf64, 175 },
+
+	/* value good in u16 and up (41259) */
+	{ tu16, tu16, 41259 },
+	{ tu16, ti32, 41259 }, { tu16, ti64, 41259 }, { tu16, tu64, 41259 },
+	{ tu16, tf32, 41259 }, { tu16, tf64, 41259 },
+
+	{ ti32, tu16, 41259 },
+	{ ti32, ti32, 41259 }, { ti32, tu32, 41259 }, { ti32, ti64, 41259 }, { ti32, tu64, 41259 },
+	{ ti32, tf32, 41259 }, { ti32, tf64, 41259 },
+
+	{ tu32, tu16, 41259 },
+	{ tu32, ti32, 41259 }, { tu32, tu32, 41259 }, { tu32, ti64, 41259 }, { tu32, tu64, 41259 },
+	{ tu32, tf32, 41259 }, { tu32, tf64, 41259 },
+
+	{ ti64, tu16, 41259 },
+	{ ti64, ti32, 41259 }, { ti64, tu32, 41259 }, { ti64, ti64, 41259 }, { ti64, tu64, 41259 },
+	{ ti64, tf32, 41259 }, { ti64, tf64, 41259 },
+
+	{ tu64, tu16, 41259 },
+	{ tu64, ti32, 41259 }, { tu64, tu32, 41259 }, { tu64, ti64, 41259 }, { tu64, tu64, 41259 },
+	{ tu64, tf32, 41259 }, { tu64, tf64, 41259 },
+
+	{ tf32, tu16, 41259 },
+	{ tf32, ti32, 41259 }, { tf32, tu32, 41259 }, { tf32, ti64, 41259 }, { tf32, tu64, 41259 },
+	{ tf32, tf32, 41259 }, { tf32, tf64, 41259 },
+
+	{ tf64, tu16, 41259 },
+	{ tf64, ti32, 41259 }, { tf64, tu32, 41259 }, { tf64, ti64, 41259 }, { tf64, tu64, 41259 },
+	{ tf64, tf32, 41259 }, { tf64, tf64, 41259 },
+
+	/* value good in u32 and up (3758096384) */
+	{ tu32, tu32, 3758096384 }, { tu32, ti64, 3758096384 }, { tu32, tu64, 3758096384 },
+	{ tu32, tf32, 3758096384 }, { tu32, tf64, 3758096384 },
+
+	{ ti64, tu32, 3758096384 }, { ti64, ti64, 3758096384 }, { ti64, tu64, 3758096384 },
+	{ ti64, tf32, 3758096384 }, { ti64, tf64, 3758096384 },
+
+	{ tu64, tu32, 3758096384 }, { tu64, ti64, 3758096384 }, { tu64, tu64, 3758096384 },
+	{ tu64, tf32, 3758096384 }, { tu64, tf64, 3758096384 },
+
+	{ tf32, tu32, 3758096384 }, { tf32, ti64, 3758096384 }, { tf32, tu64, 3758096384 },
+	{ tf32, tf32, 3758096384 }, { tf32, tf64, 3758096384 },
+
+	{ tf64, tu32, 3758096384 }, { tf64, ti64, 3758096384 }, { tf64, tu64, 3758096384 },
+	{ tf64, tf32, 3758096384 }, { tf64, tf64, 3758096384 },
+
+	/* value good in u64 and up (16717361816799281152) */
+	{ tu64, tu64, 16717361816799281152 },
+	{ tu64, tf32, 16717361816799281152 }, { tu64, tf64, 16717361816799281152 },
+
+	{ tf32, tu64, 16717361816799281152 },
+	{ tf32, tf32, 16717361816799281152 }, { tf32, tf64, 16717361816799281152 },
+
+	{ tf64, tu64, 16717361816799281152 },
+	{ tf64, tf32, 16717361816799281152 }, { tf64, tf64, 16717361816799281152 },
+}
+
+func main() {
+	for i:=0; i<len(x); i++ {
+		v := x[i].val		// input value
+		w := big(0)		// output value
+		f := x[i].from		// input type
+		t := x[i].to		// output type
+
+		i8  = 0; u8  = 0; i16 = 0; u16 = 0
+		i32 = 0; u32 = 0; i64 = 0; u64 = 0
+		f32 = 0; f64 = 0
+
+		switch f*100 + t {
+		default:
+			println("missing case", i, v, f, t)
+			w = v
+
+		case ti8*100 + ti8:
+			i8 = int8(v); i8 = int8(i8); w = big(i8)
+		case ti8*100 + tu8:
+			i8 = int8(v); u8 = uint8(i8); w = big(u8)
+		case ti8*100 + ti16:
+			i8 = int8(v); i16 = int16(i8); w = big(i16)
+		case ti8*100 + tu16:
+			i8 = int8(v); u16 = uint16(i8); w = big(u16)
+		case ti8*100 + ti32:
+			i8 = int8(v); i32 = int32(i8); w = big(i32)
+		case ti8*100 + tu32:
+			i8 = int8(v); u32 = uint32(i8); w = big(u32)
+		case ti8*100 + ti64:
+			i8 = int8(v); i64 = int64(i8); w = big(i64)
+		case ti8*100 + tu64:
+			i8 = int8(v); u64 = uint64(i8); w = big(u64)
+		case ti8*100 + tf32:
+			i8 = int8(v); f32 = float32(i8); w = big(f32)
+		case ti8*100 + tf64:
+			i8 = int8(v); f64 = float64(i8); w = big(f64)
+
+		case tu8*100 + ti8:
+			u8 = uint8(v); i8 = int8(u8); w = big(i8)
+		case tu8*100 + tu8:
+			u8 = uint8(v); u8 = uint8(u8); w = big(u8)
+		case tu8*100 + ti16:
+			u8 = uint8(v); i16 = int16(u8); w = big(i16)
+		case tu8*100 + tu16:
+			u8 = uint8(v); u16 = uint16(u8); w = big(u16)
+		case tu8*100 + ti32:
+			u8 = uint8(v); i32 = int32(u8); w = big(i32)
+		case tu8*100 + tu32:
+			u8 = uint8(v); u32 = uint32(u8); w = big(u32)
+		case tu8*100 + ti64:
+			u8 = uint8(v); i64 = int64(u8); w = big(i64)
+		case tu8*100 + tu64:
+			u8 = uint8(v); u64 = uint64(u8); w = big(u64)
+		case tu8*100 + tf32:
+			u8 = uint8(v); f32 = float32(u8); w = big(f32)
+		case tu8*100 + tf64:
+			u8 = uint8(v); f64 = float64(u8); w = big(f64)
+
+		case ti16*100 + ti8:
+			i16 = int16(v); i8 = int8(i16); w = big(i8)
+		case ti16*100 + tu8:
+			i16 = int16(v); u8 = uint8(i16); w = big(u8)
+		case ti16*100 + ti16:
+			i16 = int16(v); i16 = int16(i16); w = big(i16)
+		case ti16*100 + tu16:
+			i16 = int16(v); u16 = uint16(i16); w = big(u16)
+		case ti16*100 + ti32:
+			i16 = int16(v); i32 = int32(i16); w = big(i32)
+		case ti16*100 + tu32:
+			i16 = int16(v); u32 = uint32(i16); w = big(u32)
+		case ti16*100 + ti64:
+			i16 = int16(v); i64 = int64(i16); w = big(i64)
+		case ti16*100 + tu64:
+			i16 = int16(v); u64 = uint64(i16); w = big(u64)
+		case ti16*100 + tf32:
+			i16 = int16(v); f32 = float32(i16); w = big(f32)
+		case ti16*100 + tf64:
+			i16 = int16(v); f64 = float64(i16); w = big(f64)
+
+		case tu16*100 + ti8:
+			u16 = uint16(v); i8 = int8(u16); w = big(i8)
+		case tu16*100 + tu8:
+			u16 = uint16(v); u8 = uint8(u16); w = big(u8)
+		case tu16*100 + ti16:
+			u16 = uint16(v); i16 = int16(u16); w = big(i16)
+		case tu16*100 + tu16:
+			u16 = uint16(v); u16 = uint16(u16); w = big(u16)
+		case tu16*100 + ti32:
+			u16 = uint16(v); i32 = int32(u16); w = big(i32)
+		case tu16*100 + tu32:
+			u16 = uint16(v); u32 = uint32(u16); w = big(u32)
+		case tu16*100 + ti64:
+			u16 = uint16(v); i64 = int64(u16); w = big(i64)
+		case tu16*100 + tu64:
+			u16 = uint16(v); u64 = uint64(u16); w = big(u64)
+		case tu16*100 + tf32:
+			u16 = uint16(v); f32 = float32(u16); w = big(f32)
+		case tu16*100 + tf64:
+			u16 = uint16(v); f64 = float64(u16); w = big(f64)
+
+		case ti32*100 + ti8:
+			i32 = int32(v); i8 = int8(i32); w = big(i8)
+		case ti32*100 + tu8:
+			i32 = int32(v); u8 = uint8(i32); w = big(u8)
+		case ti32*100 + ti16:
+			i32 = int32(v); i16 = int16(i32); w = big(i16)
+		case ti32*100 + tu16:
+			i32 = int32(v); u16 = uint16(i32); w = big(u16)
+		case ti32*100 + ti32:
+			i32 = int32(v); i32 = int32(i32); w = big(i32)
+		case ti32*100 + tu32:
+			i32 = int32(v); u32 = uint32(i32); w = big(u32)
+		case ti32*100 + ti64:
+			i32 = int32(v); i64 = int64(i32); w = big(i64)
+		case ti32*100 + tu64:
+			i32 = int32(v); u64 = uint64(i32); w = big(u64)
+		case ti32*100 + tf32:
+			i32 = int32(v); f32 = float32(i32); w = big(f32)
+		case ti32*100 + tf64:
+			i32 = int32(v); f64 = float64(i32); w = big(f64)
+
+		case tu32*100 + ti8:
+			u32 = uint32(v); i8 = int8(u32); w = big(i8)
+		case tu32*100 + tu8:
+			u32 = uint32(v); u8 = uint8(u32); w = big(u8)
+		case tu32*100 + ti16:
+			u32 = uint32(v); i16 = int16(u32); w = big(i16)
+		case tu32*100 + tu16:
+			u32 = uint32(v); u16 = uint16(u32); w = big(u16)
+		case tu32*100 + ti32:
+			u32 = uint32(v); i32 = int32(u32); w = big(i32)
+		case tu32*100 + tu32:
+			u32 = uint32(v); u32 = uint32(u32); w = big(u32)
+		case tu32*100 + ti64:
+			u32 = uint32(v); i64 = int64(u32); w = big(i64)
+		case tu32*100 + tu64:
+			u32 = uint32(v); u64 = uint64(u32); w = big(u64)
+		case tu32*100 + tf32:
+			u32 = uint32(v); f32 = float32(u32); w = big(f32)
+		case tu32*100 + tf64:
+			u32 = uint32(v); f64 = float64(u32); w = big(f64)
+
+		case ti64*100 + ti8:
+			i64 = int64(v); i8 = int8(i64); w = big(i8)
+		case ti64*100 + tu8:
+			i64 = int64(v); u8 = uint8(i64); w = big(u8)
+		case ti64*100 + ti16:
+			i64 = int64(v); i16 = int16(i64); w = big(i16)
+		case ti64*100 + tu16:
+			i64 = int64(v); u16 = uint16(i64); w = big(u16)
+		case ti64*100 + ti32:
+			i64 = int64(v); i32 = int32(i64); w = big(i32)
+		case ti64*100 + tu32:
+			i64 = int64(v); u32 = uint32(i64); w = big(u32)
+		case ti64*100 + ti64:
+			i64 = int64(v); i64 = int64(i64); w = big(i64)
+		case ti64*100 + tu64:
+			i64 = int64(v); u64 = uint64(i64); w = big(u64)
+		case ti64*100 + tf32:
+			i64 = int64(v); f32 = float32(i64); w = big(f32)
+		case ti64*100 + tf64:
+			i64 = int64(v); f64 = float64(i64); w = big(f64)
+
+		case tu64*100 + ti8:
+			u64 = uint64(v); i8 = int8(u64); w = big(i8)
+		case tu64*100 + tu8:
+			u64 = uint64(v); u8 = uint8(u64); w = big(u8)
+		case tu64*100 + ti16:
+			u64 = uint64(v); i16 = int16(u64); w = big(i16)
+		case tu64*100 + tu16:
+			u64 = uint64(v); u16 = uint16(u64); w = big(u16)
+		case tu64*100 + ti32:
+			u64 = uint64(v); i32 = int32(u64); w = big(i32)
+		case tu64*100 + tu32:
+			u64 = uint64(v); u32 = uint32(u64); w = big(u32)
+		case tu64*100 + ti64:
+			u64 = uint64(v); i64 = int64(u64); w = big(i64)
+		case tu64*100 + tu64:
+			u64 = uint64(v); u64 = uint64(u64); w = big(u64)
+		case tu64*100 + tf32:
+			u64 = uint64(v); f32 = float32(u64); w = big(f32)
+		case tu64*100 + tf64:
+			u64 = uint64(v); f64 = float64(u64); w = big(f64)
+
+		case tf32*100 + ti8:
+			f32 = float32(v); i8 = int8(f32); w = big(i8)
+		case tf32*100 + tu8:
+			f32 = float32(v); u8 = uint8(f32); w = big(u8)
+		case tf32*100 + ti16:
+			f32 = float32(v); i16 = int16(f32); w = big(i16)
+		case tf32*100 + tu16:
+			f32 = float32(v); u16 = uint16(f32); w = big(u16)
+		case tf32*100 + ti32:
+			f32 = float32(v); i32 = int32(f32); w = big(i32)
+		case tf32*100 + tu32:
+			f32 = float32(v); u32 = uint32(f32); w = big(u32)
+		case tf32*100 + ti64:
+			f32 = float32(v); i64 = int64(f32); w = big(i64)
+		case tf32*100 + tu64:
+			f32 = float32(v); u64 = uint64(f32); w = big(u64)
+		case tf32*100 + tf32:
+			f32 = float32(v); f32 = float32(f32); w = big(f32)
+		case tf32*100 + tf64:
+			f32 = float32(v); f64 = float64(f32); w = big(f64)
+
+		case tf64*100 + ti8:
+			f64 = float64(v); i8 = int8(f64); w = big(i8)
+		case tf64*100 + tu8:
+			f64 = float64(v); u8 = uint8(f64); w = big(u8)
+		case tf64*100 + ti16:
+			f64 = float64(v); i16 = int16(f64); w = big(i16)
+		case tf64*100 + tu16:
+			f64 = float64(v); u16 = uint16(f64); w = big(u16)
+		case tf64*100 + ti32:
+			f64 = float64(v); i32 = int32(f64); w = big(i32)
+		case tf64*100 + tu32:
+			f64 = float64(v); u32 = uint32(f64); w = big(u32)
+		case tf64*100 + ti64:
+			f64 = float64(v); i64 = int64(f64); w = big(i64)
+		case tf64*100 + tu64:
+			f64 = float64(v); u64 = uint64(f64); w = big(u64)
+		case tf64*100 + tf32:
+			f64 = float64(v); f32 = float32(f64); w = big(f32)
+		case tf64*100 + tf64:
+			f64 = float64(v); f64 = float64(f64); w = big(f64)
+		}
+		if v != w { println(i, v, w, f, t) }
+	}
+}