Revert "make SkJumper stages normal Skia code"

This reverts commit 22e536e3a1a09405d1c0e6f071717a726d86e8d4.

Reason for revert: wrong include path :/

Original change's description:
> make SkJumper stages normal Skia code
> 
> Enough clients are using Clang now that we can say, use Clang to build
> if you want these software pipeline stages to go fast.
> 
> This lets us drop the offline build aspect of SkJumper stages, instead
> building as part of Skia using the SkOpts framework.
> 
> I think everything should work, except I've (temporarily) removed
> AVX-512 support.  I will put this back in a follow up.
> 
> I have had to drop Windows down to __vectorcall and our narrower
> stage calling convention that keeps the d-registers on the stack.
> I tried forcing sysv_abi, but that crashed Clang.  :/
> 
> Added a TODO to up the same narrower stage calling convention
> for lowp stages... we just *don't* today, for no good reason.
> 
> Change-Id: Iaaa792ffe4deab3508d2dc5d0008c163c24b3383
> Reviewed-on: https://skia-review.googlesource.com/110641
> Commit-Queue: Mike Klein <mtklein@chromium.org>
> Reviewed-by: Herb Derby <herb@google.com>
> Reviewed-by: Florin Malita <fmalita@chromium.org>

TBR=mtklein@chromium.org,herb@google.com,fmalita@chromium.org

Change-Id: I2bdc709c80cdfa6b13ff24e024b3721bef887f46
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/112741
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Mike Klein <mtklein@chromium.org>

1 files changed, 17 insertions, 3 deletions

diff --git a/gn/core.gni b/gn/core.gni
index 12a74ae93b..bcec7c02f0 100644
--- a/gn/core.gni
+++ b/gn/core.gni
@@ -440,8 +440,6 @@ skia_core_sources = [
   "$_include/core/SkUnPreMultiply.h",
   "$_include/core/SkVertices.h",
 
-  "$_src/jumper/SkJumper.cpp",
-
   # private
   "$_include/private/SkAtomics.h",
   "$_include/private/SkChecksum.h",
@@ -529,4 +527,20 @@ skia_core_sources = [
   "$_src/pathops/SkReduceOrder.h",
 ]
 
-skia_core_defines = []  #  Used to be used by Chromium, but no longer.
+skia_core_sources += [
+  "$_src/jumper/SkJumper.cpp",
+  "$_src/jumper/SkJumper_stages.cpp",
+  "$_src/jumper/SkJumper_stages_lowp.cpp",
+]
+skia_core_defines = []
+if (is_win) {
+  if (host_os == "win") {
+    skia_core_sources += [ "$_src/jumper/SkJumper_generated_win.S" ]
+  } else {
+    # TODO(thakis): Enable jumper in linux->win cross builds once the
+    # assembler situation is figured out, https://crbug.com/762167
+    skia_core_defines += [ "SK_JUMPER_USE_ASSEMBLY=0" ]
+  }
+} else if (target_cpu != "wasm") {
+  skia_core_sources += [ "$_src/jumper/SkJumper_generated.S" ]
+}