Warn about use of esp with DynASM x64.

1 files changed, 3 insertions, 1 deletions

diff --git a/dynasm/dasm_x86.lua b/dynasm/dasm_x86.lua
index 41144e12..aa1a5c32 100644
--- a/dynasm/dasm_x86.lua
+++ b/dynasm/dasm_x86.lua
@@ -786,7 +786,9 @@ local function parseoperand(param)
           if t.opsize == "f" then
             t.mode = t.reg == 0 and "fF" or "f"
           else
-            if reg == "@w4" then wwarn("bad idea, try again with `esp'") end
+            if reg == "@w4" or (x64 and reg == "@d4") then
+              wwarn("bad idea, try again with `"..(x64 and "rsp'" or "esp'"))
+            end
             t.mode = t.reg == 0 and "rmR" or (reg == "@b1" and "rmC" or "rm")
           end
           break