add movbe

Author: RSDuck

catnip/x64assembler.nim

@@ -739,6 +739,14 @@ genAssembler cmov:
     (reg32, rm32, cond): (rex, 0x0F, 0x40 + ord(cond), modrm(rm, reg))
     (reg64, rm64, cond): (op64, 0x0F, 0x40 + ord(cond), modrm(rm, reg))
 
+genAssembler movbe:
+    (reg16, rmMemOnly): (op16, rex, 0x0F, 0x38, 0xF0, modrm(rm, reg))
+    (reg32, rmMemOnly): (rex, 0x0F, 0x38, 0xF0, modrm(rm, reg))
+    (reg64, rmMemOnly): (op64, 0x0F, 0x38, 0xF0, modrm(rm, reg))
+    (rmMemOnly, reg16): (op16, rex, 0x0F, 0x38, 0xF1, modrm(rm, reg))
+    (rmMemOnly, reg32): (rex, 0x0F, 0x38, 0xF1, modrm(rm, reg))
+    (rmMemOnly, reg64): (op64, 0x0F, 0x38, 0xF1, modrm(rm, reg))
+
 genAssembler cwd: (): (op16, 0x99)
 genAssembler cdq: (): (0x99)
 genAssembler cqo: (): (op64, 0x99)

tests/test1.nim

@@ -342,6 +342,19 @@ proc main =
         s.jcc(condNotZero, funcStart)
         s.ret()
 
+    s.movbe(regAx, memMemOnly(regRax))
+    s.movbe(regAx, memMemOnly(regR15))
+    s.movbe(regEax, memMemOnly(regRax))
+    s.movbe(regEax, memMemOnly(regR15))
+    s.movbe(regRax, memMemOnly(regRax))
+    s.movbe(regRax, memMemOnly(regR15))
+    s.movbe(memMemOnly(regRax), regAx)
+    s.movbe(memMemOnly(regR15), regAx)
+    s.movbe(memMemOnly(regRax), regEax)
+    s.movbe(memMemOnly(regR15), regEax)
+    s.movbe(memMemOnly(regRax), regRax)
+    s.movbe(memMemOnly(regR15), regRax)
+
     let stream = newFileStream("assembled.bin", fmWrite)
     stream.writeData(addr data[0], s.offset)
     stream.close()