ARM: Implement conversion to/from half precision.

[gem5.git] / src / arch / arm / isa / formats / fp.isa

diff --git a/src/arch/arm/isa/formats/fp.isa b/src/arch/arm/isa/formats/fp.isa
index d509fc28adca7e807dd536d05fe57be0135b4531..03e574648ba040fdad804f2731e0014e4fde0a8b 100644 (file)
--- a/src/arch/arm/isa/formats/fp.isa
+++ b/src/arch/arm/isa/formats/fp.isa
@@ -655,8 +655,23 @@ let {{
                 }
               case 0x2:
               case 0x3:
-                // Between half and single precision.
-                return new WarnUnimplemented("vcvtb, vcvtt", machInst);
+                {
+                    const bool toHalf = bits(machInst, 16);
+                    const bool top = bits(machInst, 7);
+                    if (top) {
+                        if (toHalf) {
+                            return new VcvtFpSFpHT(machInst, vd, vm);
+                        } else {
+                            return new VcvtFpHTFpS(machInst, vd, vm);
+                        }
+                    } else {
+                        if (toHalf) {
+                            return new VcvtFpSFpHB(machInst, vd, vm);
+                        } else {
+                            return new VcvtFpHBFpS(machInst, vd, vm);
+                        }
+                    }
+                }
               case 0x4:
                 if (single) {
                     if (e) {