Initial support for loading/storing bit-fields

4 files changed, 42 insertions, 0 deletions

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 }