summaryrefslogtreecommitdiff
path: root/src/unistd/superh/pipe.s
diff options
context:
space:
mode:
Diffstat (limited to 'src/unistd/superh/pipe.s')
-rw-r--r--src/unistd/superh/pipe.s27
1 files changed, 27 insertions, 0 deletions
diff --git a/src/unistd/superh/pipe.s b/src/unistd/superh/pipe.s
new file mode 100644
index 00000000..d865ae3a
--- /dev/null
+++ b/src/unistd/superh/pipe.s
@@ -0,0 +1,27 @@
+.global pipe
+.type pipe, @function
+pipe:
+ mov #42, r3
+ trapa #17
+
+ ! work around hardware bug
+ or r0, r0
+ or r0, r0
+ or r0, r0
+ or r0, r0
+ or r0, r0
+
+ cmp/pz r0
+ bt 1f
+
+ mov.l L1, r1
+ braf r1
+ mov r0, r4
+
+1: mov.l r0, @(0,r4)
+ mov.l r1, @(4,r4)
+ rts
+ mov #0, r0
+
+.align 2
+L1: .long __syscall_ret@PLT-(1b-.)