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-rw-r--r--riscv/insns/mhacc.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/riscv/insns/mhacc.h b/riscv/insns/mhacc.h
new file mode 100644
index 00000000..77de911d
--- /dev/null
+++ b/riscv/insns/mhacc.h
@@ -0,0 +1,4 @@
+require_extension('P');
+require_rv32;
+sreg_t mres = sext32(RS1) * sext32(RS2);
+WRITE_RD(RD + (mres >> 32)); \ No newline at end of file