ARM64: Fuse FP multiply-add/sub.

Contributed by Djordje Kovacevic and Stefan Pejic from RT-RK.com.

1 files changed, 5 insertions, 0 deletions

diff --git a/src/lj_emit_arm64.h b/src/lj_emit_arm64.h
index 6686802b..e0f43689 100644
--- a/src/lj_emit_arm64.h
+++ b/src/lj_emit_arm64.h
@@ -74,6 +74,11 @@ static uint32_t emit_isfpk64(uint64_t n)
 
 /* -- Emit basic instructions --------------------------------------------- */
 
+static void emit_dnma(ASMState *as, A64Ins ai, Reg rd, Reg rn, Reg rm, Reg ra)
+{
+  *--as->mcp = ai | A64F_D(rd) | A64F_N(rn) | A64F_M(rm) | A64F_A(ra);
+}
+
 static void emit_dnm(ASMState *as, A64Ins ai, Reg rd, Reg rn, Reg rm)
 {
   *--as->mcp = ai | A64F_D(rd) | A64F_N(rn) | A64F_M(rm);