Subzero: Add a script that builds a hybrid Subzero/llc native executable.
The script translates a pexe using both Subzero and llc, and then uses linker tricks to resolve each symbol into either its Subzero or llc version. This enables quick bisection-based debugging of Subzero code generation.
BUG= none
R=jfb@chromium.org, jvoung@chromium.org
Review URL: https://codereview.chromium.org/551953002
diff --git a/runtime/szrt.c b/runtime/szrt.c
new file mode 100644
index 0000000..908c20e
--- /dev/null
+++ b/runtime/szrt.c
@@ -0,0 +1,77 @@
+//===- subzero/runtime/szrt.c - Subzero runtime source ----------*- C++ -*-===//
+//
+// The Subzero Code Generator
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the runtime helper routines that are needed by
+// Subzero. This needs to be compiled by some non-Subzero compiler.
+//
+//===----------------------------------------------------------------------===//
+
+#include <stdint.h>
+#include <stdlib.h>
+
+void ice_unreachable(void) {
+ abort();
+}
+
+uint32_t cvtftoui32(float value) {
+ return (uint32_t) value;
+}
+
+uint32_t cvtdtoui32(double value) {
+ return (uint32_t) value;
+}
+
+int64_t cvtftosi64(float value) {
+ return (int64_t) value;
+}
+
+int64_t cvtdtosi64(double value) {
+ return (int64_t) value;
+}
+
+uint64_t cvtftoui64(float value) {
+ return (uint64_t) value;
+}
+
+uint64_t cvtdtoui64(double value) {
+ return (uint64_t) value;
+}
+
+float cvtui32tof(uint32_t value) {
+ return (float) value;
+}
+
+float cvtsi64tof(int64_t value) {
+ return (float) value;
+}
+
+float cvtui64tof(uint64_t value) {
+ return (float) value;
+}
+
+double cvtui32tod(uint32_t value) {
+ return (double) value;
+}
+
+double cvtsi64tod(int64_t value) {
+ return (double) value;
+}
+
+double cvtui64tod(uint64_t value) {
+ return (double) value;
+}
+
+/* TODO(stichnot):
+ Sz_fptoui_v4f32
+ Sz_uitofp_v4i32
+ Sz_bitcast_v8i1_to_i8
+ Sz_bitcast_v16i1_to_i16
+ Sz_bitcast_i8_to_v8i1
+ Sz_bitcast_i16_to_v16i1
+*/
