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arm: precise float64 software floating point

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Adds softfloat64 to generic runtime
(will be discarded by linker when unused)
and adds test for it.  I used the test to check
the software code against amd64 hardware
and then check the software code against
the arm and its simulation of hardware.
The latter should have been a no-op (testing
against itself) but turned up a bug in 5c causing
the vlrt.c routines to miscompile.

These changes make the cmath, math,
and strconv tests pass without any special
accommodations for arm.

R=ken2
CC=golang-dev
https://golang.org/cl/2713042
This commit is contained in:
Russ Cox 2010-10-25 17:55:50 -07:00
parent e351533aab
commit 7c2b1597c6
7 changed files with 787 additions and 275 deletions
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17
src/pkg/runtime/export_test.go Normal file
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// 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.
// Export guts for testing.
package runtime
var Fadd64 = fadd64
var Fsub64 = fsub64
var Fmul64 = fmul64
var Fdiv64 = fdiv64
var F64to32 = f64to32
var F32to64 = f32to64
var Fcmp64 = fcmp64
var Fintto64 = fintto64
var F64toint = f64toint