[mlir][tosa] Fix floating point offset for tosa.resize

Offset is a signed value, so use `arith.sitofp`

See also #59585

Reviewed By: NatashaKnk, jpienaar

Differential Revision: https://reviews.llvm.org/D140958

Author: rwalkr

mlir/lib/Conversion/TosaToLinalg/TosaToLinalg.cpp

@@ -1614,7 +1614,7 @@ class GenericResizeConverter : public OpRewritePattern<tosa::ResizeOp> {
         Value val = b.create<arith::UIToFPOp>(b.getF32Type(), in);
         scaleN = b.create<arith::UIToFPOp>(b.getF32Type(), scaleN);
         scaleD = b.create<arith::UIToFPOp>(b.getF32Type(), scaleD);
-        offset = b.create<arith::UIToFPOp>(b.getF32Type(), offset);
+        offset = b.create<arith::SIToFPOp>(b.getF32Type(), offset);
         val = b.create<arith::MulFOp>(val, scaleD);
         val = b.create<arith::AddFOp>(val, offset);
         val = b.create<arith::DivFOp>(val, scaleN);

mlir/test/Conversion/TosaToLinalg/tosa-to-linalg-resize.mlir

@@ -310,7 +310,7 @@ func.func @resize_nearest_fp(%input: tensor<1x50x48x1xf32>) -> () {
   // CHECK: %[[Y0:.+]] = arith.uitofp %[[Y]]
   // CHECK: %[[SCALE_Y_N:.*]] = arith.uitofp %[[ISCALE_Y_N]]
   // CHECK: %[[SCALE_Y_D:.*]] = arith.uitofp %[[ISCALE_Y_D]]
-  // CHECK: %[[OFFSET_Y:.*]] = arith.uitofp %[[IOFFSET_Y]]
+  // CHECK: %[[OFFSET_Y:.*]] = arith.sitofp %[[IOFFSET_Y]]
   // CHECK: %[[VAL_29:.*]] = arith.mulf %[[Y0]], %[[SCALE_Y_D]]
   // CHECK: %[[VAL_31:.*]] = arith.addf %[[VAL_29]], %[[OFFSET_Y]]
   // CHECK: %[[VAL_33:.*]] = arith.divf %[[VAL_31]], %[[SCALE_Y_N]]
@@ -321,7 +321,7 @@ func.func @resize_nearest_fp(%input: tensor<1x50x48x1xf32>) -> () {
   // CHECK: %[[X0:.+]] = arith.uitofp %[[X]]
   // CHECK: %[[SCALE_X_N:.*]] = arith.uitofp %[[ISCALE_X_N]]
   // CHECK: %[[SCALE_X_D:.*]] = arith.uitofp %[[ISCALE_X_D]]
-  // CHECK: %[[OFFSET_X:.*]] = arith.uitofp %[[IOFFSET_X]]
+  // CHECK: %[[OFFSET_X:.*]] = arith.sitofp %[[IOFFSET_X]]
   // CHECK: %[[VAL_30:.*]] = arith.mulf %[[X0]], %[[SCALE_X_D]]
   // CHECK: %[[VAL_32:.*]] = arith.addf %[[VAL_30]], %[[OFFSET_X]]
   // CHECK: %[[VAL_34:.*]] = arith.divf %[[VAL_32]], %[[SCALE_X_N]]
@@ -384,7 +384,7 @@ func.func @resize_bilinear_fp(%input: tensor<1x23x24x1xf32>) -> () {
   // CHECK: %[[Y0:.+]] = arith.uitofp %[[Y]]
   // CHECK: %[[SCALE_Y_N:.*]] = arith.uitofp %[[ISCALE_Y_N]]
   // CHECK: %[[SCALE_Y_D:.*]] = arith.uitofp %[[ISCALE_Y_D]]
-  // CHECK: %[[OFFSET_Y:.*]] = arith.uitofp %[[IOFFSET_Y]]
+  // CHECK: %[[OFFSET_Y:.*]] = arith.sitofp %[[IOFFSET_Y]]
   // CHECK: %[[VAL_29:.*]] = arith.mulf %[[Y0]], %[[SCALE_Y_D]]
   // CHECK: %[[VAL_31:.*]] = arith.addf %[[VAL_29]], %[[OFFSET_Y]]
   // CHECK: %[[VAL_33:.*]] = arith.divf %[[VAL_31]], %[[SCALE_Y_N]]
@@ -395,7 +395,7 @@ func.func @resize_bilinear_fp(%input: tensor<1x23x24x1xf32>) -> () {
   // CHECK: %[[X0:.+]] = arith.uitofp %[[X]]
   // CHECK: %[[SCALE_X_N:.*]] = arith.uitofp %[[ISCALE_X_N]]
   // CHECK: %[[SCALE_X_D:.*]] = arith.uitofp %[[ISCALE_X_D]]
-  // CHECK: %[[OFFSET_X:.*]] = arith.uitofp %[[IOFFSET_X]]
+  // CHECK: %[[OFFSET_X:.*]] = arith.sitofp %[[IOFFSET_X]]
   // CHECK: %[[VAL_30:.*]] = arith.mulf %[[X0]], %[[SCALE_X_D]]
   // CHECK: %[[VAL_32:.*]] = arith.addf %[[VAL_30]], %[[OFFSET_X]]
   // CHECK: %[[VAL_34:.*]] = arith.divf %[[VAL_32]], %[[SCALE_X_N]]