Add SSAT, SSAT16, USAT and USAT16 ARM32 instructions (#954)

* Implement SMULWB, SMULWT, SMLAWB, SMLAWT, and add tests for some multiply instructions

* Improve test descriptions

* Rename SMULH to SMUL__

* Add SSAT, SSAT16, USAT and USAT16 ARM32 instructions

* Fix new tests

* Replace AND 0xFFFF with 16-bits zero extension (more efficient)

ARMeilleure/Instructions/InstName.cs

@@ -81,8 +81,11 @@ namespace ARMeilleure.Instructions
         Sdiv,
         Smaddl,
         Smsubl,
-        Smulh,
+        Smul__,
         Smull,
+        Smulw_,
+        Ssat,
+        Ssat16,
         Stlr,
         Stlxp,
         Stlxr,
@@ -491,9 +494,10 @@ namespace ARMeilleure.Instructions
         Rsb,
         Rsc,
         Sbfx,
-        Smlab,
+        Smla__,
         Smlal,
-        Smlalh,
+        Smlal__,
+        Smlaw_,
         Smmla,
         Smmls,
         Smmul,
@@ -519,6 +523,8 @@ namespace ARMeilleure.Instructions
         Ubfx,
         Umlal,
         Umull,
+        Usat,
+        Usat16,
         Uxtb,
         Uxtb16,
         Uxth,