Merge pull request #12572 from wateret/armel/dblarg_stack

[RyuJIT/armel] Passing stack double arguments

1 files changed, 10 insertions, 0 deletions

diff --git a/src/jit/codegenarmarch.cpp b/src/jit/codegenarmarch.cpp
index bb5069ac1d..e5146445a4 100644
--- a/src/jit/codegenarmarch.cpp
+++ b/src/jit/codegenarmarch.cpp
@@ -555,6 +555,16 @@ void CodeGen::genPutArgStk(GenTreePutArgStk* treeNode)
         {
             genConsumeReg(source);
             emit->emitIns_S_R(storeIns, storeAttr, source->gtRegNum, varNumOut, argOffsetOut);
+            if (compiler->opts.compUseSoftFP && targetType == TYP_LONG)
+            {
+                // This case currently only occurs for double types that are passed as TYP_LONG;
+                // actual long types would have been decomposed by now.
+                assert(source->IsCopyOrReload());
+                regNumber otherReg = (regNumber)source->AsCopyOrReload()->GetRegNumByIdx(1);
+                assert(otherReg != REG_NA);
+                argOffsetOut += EA_4BYTE;
+                emit->emitIns_S_R(storeIns, storeAttr, otherReg, varNumOut, argOffsetOut);
+            }
         }
         argOffsetOut += EA_SIZE_IN_BYTES(storeAttr);
         assert(argOffsetOut <= argOffsetMax); // We can't write beyound the outgoing area area