tree b0283cf9ffbc23000ca74fa9314c4545c419addb
parent 8e0be05ec7c369387c0ed3c9cf37968c6d3afbbd
author Joel Sing <joel@sing.id.au> 1579446044 +1100
committer Joel Sing <joel@sing.id.au> 1579447712 +0000

reflect: correct riscv64 assembly

R0 is not a thing in riscv64 assembly - use ZERO (rather than X0) since
the rest of this currently uses ABI names.

Updates #27532

Change-Id: I28fb68e9f80d05231a07c5921e7062777234e2c5
Reviewed-on: https://go-review.googlesource.com/c/go/+/215437
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>