arm: precise float64 software floating point
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
diff --git a/src/pkg/runtime/Makefile b/src/pkg/runtime/Makefile
index 4c8d549..58e0e76 100644
--- a/src/pkg/runtime/Makefile
+++ b/src/pkg/runtime/Makefile
@@ -25,6 +25,7 @@
error.go\
extern.go\
sig.go\
+ softfloat64.go\
type.go\
version.go\
