DynASM/x64: Add VREG support to mov64.

Thanks to Peter Cawley.

1 files changed, 8 insertions, 2 deletions

diff --git a/dynasm/dasm_x86.lua b/dynasm/dasm_x86.lua
index 07ddd98d..824c6343 100644
--- a/dynasm/dasm_x86.lua
+++ b/dynasm/dasm_x86.lua
@@ -1678,7 +1678,7 @@ if x64 then
   function map_op.mov64_2(params)
     if not params then return { "reg, imm", "reg, [disp]", "[disp], reg" } end
     if secpos+2 > maxsecpos then wflush() end
-    local opcode, op64, sz, rex
+    local opcode, op64, sz, rex, vreg
     local op64 = match(params[1], "^%[%s*(.-)%s*%]$")
     if op64 then
       local a = parseoperand(params[2])
@@ -1699,11 +1699,17 @@ if x64 then
           werror("bad operand mode")
         end
         op64 = params[2]
-        opcode = 0xb8 + band(a.reg, 7) -- !x64: no VREG support.
+        if a.reg == -1 then
+          vreg = a.vreg
+          opcode = 0xb8
+        else
+          opcode = 0xb8 + band(a.reg, 7)
+        end
         rex = a.reg > 7 and 9 or 8
       end
     end
     wputop(sz, opcode, rex)
+    if vreg then waction("VREG", vreg); wputxb(0) end
     waction("IMM_D", format("(unsigned int)(%s)", op64))
     waction("IMM_D", format("(unsigned int)((%s)>>32)", op64))
   end