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-rw-r--r--sysdeps/i960/mul_1.s23
1 files changed, 23 insertions, 0 deletions
diff --git a/sysdeps/i960/mul_1.s b/sysdeps/i960/mul_1.s
new file mode 100644
index 0000000000..e75ea42d39
--- /dev/null
+++ b/sysdeps/i960/mul_1.s
@@ -0,0 +1,23 @@
+.text
+ .align 4
+ .globl ___mpn_mul_1
+___mpn_mul_1:
+ subo g2,0,g2
+ shlo 2,g2,g4
+ subo g4,g1,g1
+ subo g4,g0,g13
+ mov 0,g0
+
+ cmpo 1,0 # clear C bit on AC.cc
+
+Loop: ld (g1)[g2*4],g5
+ emul g3,g5,g6
+
+ addc g0,g6,g6 # relies on that C bit is clear
+ st g6,(g13)[g2*4]
+ addc 0,g7,g0
+
+ addo g2,1,g2
+ cmpobne 0,g2,Loop # when branch is taken, clears C bit
+
+ ret