fix bfe for true16 mode

Author: broxigarchen

llvm/lib/Target/AMDGPU/SIInstructions.td

@@ -2623,6 +2623,8 @@ def : GCNPat<
   (i32 (DivergentSextInreg<i1> i32:$src)),
   (V_BFE_I32_e64 i32:$src, (i32 0), (i32 1))>;
 
+foreach p = [NotHasTrue16BitInsts, UseFakeTrue16Insts] in
+let True16Predicate = p in {
 def : GCNPat <
   (i16 (DivergentSextInreg<i1> i16:$src)),
   (V_BFE_I32_e64 $src, (i32 0), (i32 1))
@@ -2632,6 +2634,23 @@ def : GCNPat <
   (i16 (DivergentSextInreg<i8> i16:$src)),
   (V_BFE_I32_e64 $src, (i32 0), (i32 8))
 >;
+}
+
+let True16Predicate = UseRealTrue16Insts in {
+def : GCNPat <
+  (i16 (DivergentSextInreg<i1> i16:$src)),
+  (V_BFE_I32_e64
+   (REG_SEQUENCE VGPR_32, VGPR_16:$src, lo16, (i16 (IMPLICIT_DEF)), hi16),
+   (i32 0), (i32 1))
+>;
+
+def : GCNPat <
+  (i16 (DivergentSextInreg<i8> i16:$src)),
+  (V_BFE_I32_e64
+   (REG_SEQUENCE VGPR_32, VGPR_16:$src, lo16, (i16 (IMPLICIT_DEF)), hi16),
+   (i32 0), (i32 8))
+>;
+}
 
 def : GCNPat<
   (i32 (DivergentSextInreg<i8> i32:$src)),

llvm/lib/Target/AMDGPU/VOP3Instructions.td

@@ -319,11 +319,21 @@ let SchedRW = [Write64Bit] in {
 } // End SchedRW = [Write64Bit]
 } // End isReMaterializable = 1
 
+foreach p = [NotHasTrue16BitInsts, UseFakeTrue16Insts] in
+let True16Predicate = p in
 def : GCNPat<
   (i32 (DivergentUnaryFrag<sext> i16:$src)),
   (i32 (V_BFE_I32_e64 i16:$src, (i32 0), (i32 0x10)))
 >;
 
+let True16Predicate = UseRealTrue16Insts in
+def : GCNPat<
+  (i32 (DivergentUnaryFrag<sext> i16:$src)),
+  (i32 (V_BFE_I32_e64
+       (REG_SEQUENCE VGPR_32, VGPR_16:$src, lo16, (i16 (IMPLICIT_DEF)), hi16),
+       (i32 0), (i32 0x10)))
+>;
+
 let isReMaterializable = 1 in {
 let SubtargetPredicate = isGFX6GFX7GFX10Plus in {
 defm V_MULLIT_F32 : VOP3Inst <"v_mullit_f32", VOP3_Profile<VOP_F32_F32_F32_F32>>;
@@ -423,6 +433,8 @@ def V_INTERP_P1LV_F16 : VOP3Interp <"v_interp_p1lv_f16", VOP3_INTERP16<[f32, f32
 
 } // End SubtargetPredicate = Has16BitInsts, isCommutable = 1
 
+foreach p = [NotHasTrue16BitInsts, UseFakeTrue16Insts] in
+let True16Predicate = p in
 def : GCNPat<
   (i64 (DivergentUnaryFrag<sext> i16:$src)),
     (REG_SEQUENCE VReg_64,
@@ -432,6 +444,18 @@ def : GCNPat<
       ), VGPR_32)), sub1)
 >;
 
+let True16Predicate = UseRealTrue16Insts in
+def : GCNPat<
+  (i64 (DivergentUnaryFrag<sext> i16:$src)),
+    (REG_SEQUENCE VReg_64,
+      (i32 (V_BFE_I32_e64
+            (REG_SEQUENCE VGPR_32, VGPR_16:$src, lo16, (i16 (IMPLICIT_DEF)), hi16),
+            (S_MOV_B32 (i32 0)), (S_MOV_B32 (i32 0x10)))), sub0,
+      (i32 (COPY_TO_REGCLASS
+         (V_ASHRREV_I32_e32 (S_MOV_B32 (i32 0x1f)), (i32 (V_BFE_I32_e64 $src, (S_MOV_B32 (i32 0)), (S_MOV_B32 (i32 0x10))))
+      ), VGPR_32)), sub1)
+>;
+
 let SubtargetPredicate = isGFX8Plus, Uses = [MODE, M0, EXEC], OtherPredicates = [isNotGFX90APlus] in {
 def V_INTERP_P1_F32_e64  : VOP3Interp <"v_interp_p1_f32", VOP3_INTERP>;
 def V_INTERP_P2_F32_e64  : VOP3Interp <"v_interp_p2_f32", VOP3_INTERP>;