Add upstream note

This repository is now unused.

Fixes #22

Change-Id: I0641ccf864ac8562b220f75cd4808c21946bf469
Reviewed-on: https://review.gerrithub.io/352842


Reviewed-by: Michael Pratt <michael@pratt.im>

24a3215e (“cmd/internal/obj/riscv: Round
int(float()) towards zero”) modified the float rounding mode for
int-to-float conversions.  Update the corresponding encoding tests to
take the new encoding into account.

Change-Id: Id0e43e414fde661584bd8cf811c3dad4b134d8ea
Reviewed-on: https://review.gerrithub.io/362569


Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>

065034e5 (“cmd/internal/obj/riscv: Fix
immediate lowering 0x7ffff800 - 0x7fffffff”) modified the encoding for
MOVing an immediate into a register.  Update the corresponding encoding
tests to take the new encoding into account.

Change-Id: Ied626e939df5584874e26615183963bd38aa39a4
Reviewed-on: https://review.gerrithub.io/361807


Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Michael Pratt <michael@pratt.im>

ad5d4f9e (“cmd/internal/obj: large CALL
relocations”) changed the expansion of CALL and JMP instructions. Update
the corresponding encoding tests to take the new expansions into
account.

Fixes https://github.com/riscv/riscv-go/issues/17.

Change-Id: I8b7e581f3ca1ff7262ac21e1025b404156ed321b
Reviewed-on: https://review.gerrithub.io/361788


Reviewed-by: Michael Pratt <michael@pratt.im>

Largely copied from MIPS, but RISC-V's arbitrary target register on JALR
and the fused BLTU instruction allows us to shorten this a bit.
Theoretical minimum is 3 instructions (LD, BLTU, JALR to a
linker-generated trampoline that decrements T0 by 12 before acting on
it).

Change-Id: I4732edcd3560dfd44f283801db49b878673e3b7e
Reviewed-on: https://review.gerrithub.io/352826


Reviewed-by: Benjamin Barenblat <bbaren@google.com>

We're now interpreting all FCVTLD instructions from the compiler as
round to zero, which is less than ideal; can the SSA->Prog layer be made
to set Scond directly?

Change-Id: Idcc178e7a8f3b45ef662d1bdc9340c3e073f250c
Reviewed-on: https://review.gerrithub.io/352823


Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>

Traceback is called with pc = sp = -1 to indicate that the values should
be fetched from the goroutine, however if a goroutine has no user frames
on its stack traceback is retried with a different PC.  Make sure that
this does not break the -1 signal.

Change-Id: Ibd284ad1250fcd80a0d5ecdaf30a67a25144ebb4
Reviewed-on: https://review.gerrithub.io/352798


Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>

Change-Id: Ia83b5d82330e20fdccf5fa9ee20c01039bf1966f
Reviewed-on: https://review.gerrithub.io/352840


Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>

If a function is longer than the range of JAL (1 MiB) this causes
internal jumps to be rewritten to AUIPC + JALR.

Change-Id: I0ce2c50f67a4d1daf26b9a2b36c3db0401a52ad0
Reviewed-on: https://review.gerrithub.io/352839


Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>

Otherwise the SUB is being inferred as a boolean, which means that if
the values being compared have the same least significant byte they may
be erroneously seen as equal.

Change-Id: I471f0048a787a07833206ed5e8e863a1dfcbd28a
Reviewed-on: https://review.gerrithub.io/352838


Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>

Was previously not zeroing the correct address range, leading to garbage
in local variables, leading to crashes in select statement execution.

Change-Id: I10e985b841d09a015a948ade204dcbca8965e800
Reviewed-on: https://review.gerrithub.io/352837


Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>

live.go and fixedbugs/issue16249.go now pass

Change-Id: I1e5bb9d3ff804de8d5e61af79a7cf29346d4c82c
Reviewed-on: https://review.gerrithub.io/352836


Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>

This removes a lot of temporaries allowing live2.go to pass.

Change-Id: I39b8d60c9d0ed265c81665cfa19a0e1ea80f251d
Reviewed-on: https://review.gerrithub.io/352834


Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>

Change-Id: Iaf8dfb7d454f4b5f371652934f03b213374f14ff
Reviewed-on: https://review.gerrithub.io/352833


Reviewed-by: Michael Pratt <michael@pratt.im>

Change-Id: Ieab240b9fa00931e09cbfb2d2e7e82ebd1bd6bbb
Reviewed-on: https://review.gerrithub.io/352829


Reviewed-by: Michael Pratt <michael@pratt.im>

Change-Id: I9c2314650ce23365ec24d60d1d8f44ea07794e53
Reviewed-on: https://review.gerrithub.io/352828


Reviewed-by: Michael Pratt <michael@pratt.im>

(Should From3 be required in the preprocess stage?  mips apparently
doesn't.)

This causes the compiler to generate a more helpful internal error
instead of crashing if From3 is not set on a prog that reaches assemble.

Change-Id: Ie501871bab1769da47624d04711712914f0bcd72
Reviewed-on: https://review.gerrithub.io/352827


Reviewed-by: Michael Pratt <michael@pratt.im>

Change-Id: I9e0cc4b5201c56e936f8caed6acedfe24f0bf58a
Reviewed-on: https://review.gerrithub.io/352816


Reviewed-by: Michael Pratt <michael@pratt.im>

With this panic + recover is fully functional; remove the hack.

Change-Id: I9dbba0cfddfed7ef085c51e7714ed2ca63e331e1
Reviewed-on: https://review.gerrithub.io/352815


Reviewed-by: Michael Pratt <michael@pratt.im>

Change-Id: I6ff63574eeedcc13b34340cfc35548a44cc1036e
Reviewed-on: https://review.gerrithub.io/352814


Reviewed-by: Michael Pratt <michael@pratt.im>

Improves compatiblity with other assemblers.

Change-Id: I763a043dbb07d1cacc3aee470b40cbe735ef4cd1
Reviewed-on: https://review.gerrithub.io/352813


Reviewed-by: Michael Pratt <michael@pratt.im>

Change-Id: I4ca6228d2904369e2a1bbab03be9e2df5025b8e2
Reviewed-on: https://review.gerrithub.io/352812


Reviewed-by: Michael Pratt <michael@pratt.im>

Change-Id: I277a005b8f0b4e426243f1bd9ae7e037346e0cef
Reviewed-on: https://review.gerrithub.io/352811


Reviewed-by: Michael Pratt <michael@pratt.im>

This prevents calls from being misidentified as dead code and deleted
from a load with no natural exit.  Fixes hang in test/235.go.

Change-Id: I008d96dde915b5fdf41d30311dd9bab6511d502a
Reviewed-on: https://review.gerrithub.io/352810


Reviewed-by: Michael Pratt <michael@pratt.im>

Change-Id: Ib143d79e55395455558914526d222328c6212d0a
Reviewed-on: https://review.gerrithub.io/352809


Reviewed-by: Michael Pratt <michael@pratt.im>

Change-Id: Idef628a993ba728caeea656ef6a37f1832535964
Reviewed-on: https://review.gerrithub.io/352808


Reviewed-by: Michael Pratt <michael@pratt.im>

The code generation for LoweredMove and LoweredZero was not processing
the last aligned unit, leading to crashes in select statments (go test
context).

Change-Id: I1120d1ef5ee709ed4efdaf0f9f50910c39d839f0
Reviewed-on: https://review.gerrithub.io/352807


Reviewed-by: Michael Pratt <michael@pratt.im>

Change-Id: Iaf3a2287f393fc21b8a7f79389225867e05ccddf
Reviewed-on: https://review.gerrithub.io/352806


Reviewed-by: Michael Pratt <michael@pratt.im>

Indirect and interface calls were not being recognized as requiring RA
to be saved.

Change-Id: I9499707f394ce809bc2b32a4a32b58d85c3fe2ae
Reviewed-on: https://review.gerrithub.io/352805


Reviewed-by: Michael Pratt <michael@pratt.im>

Change-Id: Ie487904779dff19f7e8c97eaeaee5743f43d96fa
Reviewed-on: https://review.gerrithub.io/352804


Reviewed-by: Michael Pratt <michael@pratt.im>

Change-Id: I62b1c1b6aca76d1daf63e4b8e0670c85c50955e9
Reviewed-on: https://review.gerrithub.io/352803


Reviewed-by: Michael Pratt <michael@pratt.im>

*This loses spike support*

Change-Id: If29e76125814d51829fd49b0e621178541ec9d25
Reviewed-on: https://review.gerrithub.io/352802


Reviewed-by: Michael Pratt <michael@pratt.im>

This is the last piece needed to run Hello World and the riscvtests with
the runtime enabled.

Change-Id: Iec8766e3daec2f1f8dde65cdd03ea88ba4790521
Reviewed-on: https://review.gerrithub.io/352801


Reviewed-by: Michael Pratt <michael@pratt.im>

RISC-V is the first architecture supported by Go where the standard
function calling sequence has variable length under usual conditions.
For now I've set jmpdefer to assume a 12-byte sequence, but when
cmd/link is regularly generating the 4/8-byte sequences this will need
to be revisited.

Change-Id: I4bf7f933664565d897d1a1286a0ee44f67ce24af
Reviewed-on: https://review.gerrithub.io/352800


Reviewed-by: Michael Pratt <michael@pratt.im>

Stack checks and reflectcall are not yet online.

Change-Id: I2def5e4540330581e39ab2556a2c20da3f5c0b20
Reviewed-on: https://review.gerrithub.io/352799


Reviewed-by: Michael Pratt <michael@pratt.im>

Change-Id: I6288f1d9d19fd9b0a2b464000662b45c7a2dc4f1
Reviewed-on: https://review.gerrithub.io/352796


Reviewed-by: Michael Pratt <michael@pratt.im>

This gives a diagnostic if it turns out to be reachable and prevents a
stack address from ever pointing one-past-the-end of a function.

Change-Id: I9006b05a8593587821524071e28bb154644120c3
Reviewed-on: https://review.gerrithub.io/352794


Reviewed-by: Michael Pratt <michael@pratt.im>

This is sufficient for scheduler boot but crashes during GC boot.

Change-Id: Iae9c4cc46f8196107ac13d2ab74b1540e6d63da9
Reviewed-on: https://review.gerrithub.io/352792


Reviewed-by: Michael Pratt <michael@pratt.im>