From ea4a14c7a4943498f49c26824d68a8d4776c5ddc Mon Sep 17 00:00:00 2001
From: Michael Forney <mforney@mforney.org>
Date: Sun, 14 Apr 2019 12:28:14 -0700
Subject: Initial support for loading/storing bit-fields

---
 tests/bitfield-load-signed.c     |  7 +++++++
 tests/bitfield-load-signed.qbe   | 14 ++++++++++++++
 tests/bitfield-load-unsigned.c   |  7 +++++++
 tests/bitfield-load-unsigned.qbe | 14 ++++++++++++++
 4 files changed, 42 insertions(+)
 create mode 100644 tests/bitfield-load-signed.c
 create mode 100644 tests/bitfield-load-signed.qbe
 create mode 100644 tests/bitfield-load-unsigned.c
 create mode 100644 tests/bitfield-load-unsigned.qbe

(limited to 'tests')

diff --git a/tests/bitfield-load-signed.c b/tests/bitfield-load-signed.c
new file mode 100644
index 0000000..837ad24
--- /dev/null
+++ b/tests/bitfield-load-signed.c
@@ -0,0 +1,7 @@
+struct {
+	signed : 4, x : 15, : 13;
+} s;
+
+void f(void) {
+	s.x;
+}
diff --git a/tests/bitfield-load-signed.qbe b/tests/bitfield-load-signed.qbe
new file mode 100644
index 0000000..bc3f457
--- /dev/null
+++ b/tests/bitfield-load-signed.qbe
@@ -0,0 +1,14 @@
+export
+function $f() {
+@start.1
+@body.2
+	%.1 =l copy $s
+	%.2 =l mul 0, 1
+	%.3 =l add %.1, %.2
+	%.4 =l copy %.3
+	%.5 =w loadsw %.4
+	%.6 =w shl %.5, 13
+	%.7 =w sar %.6, 17
+	ret
+}
+export data $s = align 4 { z 4 }
diff --git a/tests/bitfield-load-unsigned.c b/tests/bitfield-load-unsigned.c
new file mode 100644
index 0000000..5a9e5fa
--- /dev/null
+++ b/tests/bitfield-load-unsigned.c
@@ -0,0 +1,7 @@
+struct {
+	unsigned : 4, x : 15, : 13;
+} s;
+
+void f(void) {
+	s.x;
+}
diff --git a/tests/bitfield-load-unsigned.qbe b/tests/bitfield-load-unsigned.qbe
new file mode 100644
index 0000000..c4ea94b
--- /dev/null
+++ b/tests/bitfield-load-unsigned.qbe
@@ -0,0 +1,14 @@
+export
+function $f() {
+@start.1
+@body.2
+	%.1 =l copy $s
+	%.2 =l mul 0, 1
+	%.3 =l add %.1, %.2
+	%.4 =l copy %.3
+	%.5 =w loaduw %.4
+	%.6 =w shl %.5, 13
+	%.7 =w shr %.6, 17
+	ret
+}
+export data $s = align 4 { z 4 }
-- 
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