forked from OSchip/llvm-project
[Fixed Point Arithmetic] Fixed Point Subtraction
This patch covers subtraction between fixed point types and other fixed point types or integers, using the conversion rules described in 4.1.4 of N1169. Differential Revision: https://reviews.llvm.org/D55844 llvm-svn: 351371
This commit is contained in:
Leonard Chan
parent
33c49c0c82
commit
837da5d3ec
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@ -740,7 +740,7 @@ public:
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}
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// Helper functions for fixed point binary operations.
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Value *EmitFixedPointAdd(const BinOpInfo &Ops);
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Value *EmitFixedPointBinOp(const BinOpInfo &Ops);
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BinOpInfo EmitBinOps(const BinaryOperator *E);
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LValue EmitCompoundAssignLValue(const CompoundAssignOperator *E,
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@ -3360,19 +3360,20 @@ Value *ScalarExprEmitter::EmitAdd(const BinOpInfo &op) {
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}
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if (op.isFixedPointBinOp())
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return EmitFixedPointAdd(op);
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return EmitFixedPointBinOp(op);
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return Builder.CreateAdd(op.LHS, op.RHS, "add");
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}
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/// The resulting value must be calculated with exact precision, so the operands
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/// may not be the same type.
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Value *ScalarExprEmitter::EmitFixedPointAdd(const BinOpInfo &op) {
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Value *ScalarExprEmitter::EmitFixedPointBinOp(const BinOpInfo &op) {
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using llvm::APSInt;
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using llvm::ConstantInt;
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const auto *BinOp = cast<BinaryOperator>(op.E);
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assert(BinOp->getOpcode() == BO_Add && "Expected operation to be addition");
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assert((BinOp->getOpcode() == BO_Add || BinOp->getOpcode() == BO_Sub) &&
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"Expected operation to be addition or subtraction");
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// The result is a fixed point type and at least one of the operands is fixed
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// point while the other is either fixed point or an int. This resulting type
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@ -3397,13 +3398,62 @@ Value *ScalarExprEmitter::EmitFixedPointAdd(const BinOpInfo &op) {
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// Perform the actual addition.
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Value *Result;
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if (ResultFixedSema.isSaturated()) {
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llvm::Intrinsic::ID IID = ResultFixedSema.isSigned()
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? llvm::Intrinsic::sadd_sat
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: llvm::Intrinsic::uadd_sat;
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Result = Builder.CreateBinaryIntrinsic(IID, FullLHS, FullRHS);
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} else {
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Result = Builder.CreateAdd(FullLHS, FullRHS);
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switch (BinOp->getOpcode()) {
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case BO_Add: {
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if (ResultFixedSema.isSaturated()) {
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llvm::Intrinsic::ID IID = ResultFixedSema.isSigned()
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? llvm::Intrinsic::sadd_sat
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: llvm::Intrinsic::uadd_sat;
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Result = Builder.CreateBinaryIntrinsic(IID, FullLHS, FullRHS);
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} else {
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Result = Builder.CreateAdd(FullLHS, FullRHS);
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}
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break;
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}
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case BO_Sub: {
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if (ResultFixedSema.isSaturated()) {
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llvm::Intrinsic::ID IID = ResultFixedSema.isSigned()
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? llvm::Intrinsic::ssub_sat
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: llvm::Intrinsic::usub_sat;
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Result = Builder.CreateBinaryIntrinsic(IID, FullLHS, FullRHS);
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} else {
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Result = Builder.CreateSub(FullLHS, FullRHS);
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}
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break;
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}
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case BO_Mul:
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case BO_Div:
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case BO_Shl:
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case BO_Shr:
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case BO_Cmp:
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case BO_LT:
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case BO_GT:
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case BO_LE:
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case BO_GE:
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case BO_EQ:
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case BO_NE:
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case BO_LAnd:
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case BO_LOr:
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case BO_MulAssign:
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case BO_DivAssign:
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case BO_AddAssign:
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case BO_SubAssign:
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case BO_ShlAssign:
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case BO_ShrAssign:
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llvm_unreachable("Found unimplemented fixed point binary operation");
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case BO_PtrMemD:
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case BO_PtrMemI:
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case BO_Rem:
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case BO_Xor:
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case BO_And:
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case BO_Or:
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case BO_Assign:
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case BO_RemAssign:
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case BO_AndAssign:
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case BO_XorAssign:
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case BO_OrAssign:
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case BO_Comma:
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llvm_unreachable("Found unsupported binary operation for fixed point types.");
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}
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// Convert to the result type.
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@ -3442,6 +3492,9 @@ Value *ScalarExprEmitter::EmitSub(const BinOpInfo &op) {
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return propagateFMFlags(V, op);
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}
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if (op.isFixedPointBinOp())
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return EmitFixedPointBinOp(op);
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return Builder.CreateSub(op.LHS, op.RHS, "sub");
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}
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@ -0,0 +1,390 @@
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// RUN: %clang_cc1 -ffixed-point -S -emit-llvm %s -o - | FileCheck %s --check-prefixes=CHECK,SIGNED
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// RUN: %clang_cc1 -ffixed-point -fpadding-on-unsigned-fixed-point -S -emit-llvm %s -o - | FileCheck %s --check-prefixes=CHECK,UNSIGNED
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void SignedSubtraction() {
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// CHECK-LABEL: SignedSubtraction
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short _Accum sa;
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_Accum a, b, c, d;
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long _Accum la;
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unsigned short _Accum usa;
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unsigned _Accum ua;
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unsigned long _Accum ula;
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short _Fract sf;
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_Fract f;
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long _Fract lf;
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unsigned short _Fract usf;
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unsigned _Fract uf;
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unsigned long _Fract ulf;
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// Same type
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// CHECK: [[SA:%[0-9]+]] = load i16, i16* %sa, align 2
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// CHECK-NEXT: [[SA2:%[0-9]+]] = load i16, i16* %sa, align 2
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// CHECK-NEXT: [[SUM:%[0-9]+]] = sub i16 [[SA]], [[SA2]]
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// CHECK-NEXT: store i16 [[SUM]], i16* %sa, align 2
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sa = sa - sa;
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// To larger scale and larger width
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// CHECK: [[SA:%[0-9]+]] = load i16, i16* %sa, align 2
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// CHECK-NEXT: [[A:%[0-9]+]] = load i32, i32* %a, align 4
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// CHECK-NEXT: [[EXT_SA:%[a-z0-9]+]] = sext i16 [[SA]] to i32
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// CHECK-NEXT: [[SA:%[a-z0-9]+]] = shl i32 [[EXT_SA]], 8
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// CHECK-NEXT: [[SUM:%[0-9]+]] = sub i32 [[SA]], [[A]]
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// CHECK-NEXT: store i32 [[SUM]], i32* %a, align 4
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a = sa - a;
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// To same scale and smaller width
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// CHECK: [[SA:%[0-9]+]] = load i16, i16* %sa, align 2
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// CHECK-NEXT: [[SF:%[0-9]+]] = load i8, i8* %sf, align 1
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// CHECK-NEXT: [[EXT_SF:%[a-z0-9]+]] = sext i8 [[SF]] to i16
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// CHECK-NEXT: [[SUM:%[0-9]+]] = sub i16 [[SA]], [[EXT_SF]]
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// CHECK-NEXT: store i16 [[SUM]], i16* %sa, align 2
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sa = sa - sf;
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// To smaller scale and same width.
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// CHECK: [[SA:%[0-9]+]] = load i16, i16* %sa, align 2
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// CHECK-NEXT: [[F:%[0-9]+]] = load i16, i16* %f, align 2
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// CHECK-NEXT: [[EXT_SA:%[a-z0-9]+]] = sext i16 [[SA]] to i24
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// CHECK-NEXT: [[SA:%[a-z0-9]+]] = shl i24 [[EXT_SA]], 8
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// CHECK-NEXT: [[EXT_F:%[a-z0-9]+]] = sext i16 [[F]] to i24
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// CHECK-NEXT: [[SUM:%[0-9]+]] = sub i24 [[SA]], [[EXT_F]]
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// CHECK-NEXT: [[RES:%[a-z0-9]+]] = ashr i24 [[SUM]], 8
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// CHECK-NEXT: [[TRUNC_RES:%[a-z0-9]+]] = trunc i24 [[RES]] to i16
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// CHECK-NEXT: store i16 [[TRUNC_RES]], i16* %sa, align 2
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sa = sa - f;
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// To smaller scale and smaller width
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// CHECK: [[A:%[0-9]+]] = load i32, i32* %a, align 4
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// CHECK-NEXT: [[SF:%[0-9]+]] = load i8, i8* %sf, align 1
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// CHECK-NEXT: [[EXT_SF:%[a-z0-9]+]] = sext i8 [[SF]] to i32
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// CHECK-NEXT: [[SF:%[a-z0-9]+]] = shl i32 [[EXT_SF]], 8
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// CHECK-NEXT: [[SUM:%[0-9]+]] = sub i32 [[A]], [[SF]]
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// CHECK-NEXT: store i32 [[SUM]], i32* %a, align 4
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a = a - sf;
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// To larger scale and same width
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// CHECK: [[A:%[0-9]+]] = load i32, i32* %a, align 4
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// CHECK-NEXT: [[LF:%[0-9]+]] = load i32, i32* %lf, align 4
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// CHECK-NEXT: [[EXT_A:%[a-z0-9]+]] = sext i32 [[A]] to i48
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// CHECK-NEXT: [[A:%[a-z0-9]+]] = shl i48 [[EXT_A]], 16
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// CHECK-NEXT: [[EXT_LF:%[a-z0-9]+]] = sext i32 [[LF]] to i48
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// CHECK-NEXT: [[SUM:%[0-9]+]] = sub i48 [[A]], [[EXT_LF]]
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// CHECK-NEXT: [[RES:%[a-z0-9]+]] = ashr i48 [[SUM]], 16
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// CHECK-NEXT: [[TRUNC_RES:%[a-z0-9]+]] = trunc i48 [[RES]] to i32
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// CHECK-NEXT: store i32 [[TRUNC_RES]], i32* %a, align 4
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a = a - lf;
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// With corresponding unsigned type
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// CHECK: [[SA:%[0-9]+]] = load i16, i16* %sa, align 2
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// CHECK-NEXT: [[USA:%[0-9]+]] = load i16, i16* %usa, align 2
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// SIGNED-NEXT: [[SA_EXT:%[a-z0-9]+]] = sext i16 [[SA]] to i17
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// SIGNED-NEXT: [[SA:%[a-z0-9]+]] = shl i17 [[SA_EXT]], 1
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// SIGNED-NEXT: [[USA_EXT:%[a-z0-9]+]] = zext i16 [[USA]] to i17
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// SIGNED-NEXT: [[SUM:%[0-9]+]] = sub i17 [[SA]], [[USA_EXT]]
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// SIGNED-NEXT: [[RESULT:%[a-z0-9]+]] = ashr i17 [[SUM]], 1
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// SIGNED-NEXT: [[SUM:%[a-z0-9]+]] = trunc i17 [[RESULT]] to i16
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// UNSIGNED-NEXT: [[SUM:%[0-9]+]] = sub i16 [[SA]], [[USA]]
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// CHECK-NEXT: store i16 [[SUM]], i16* %sa, align 2
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sa = sa - usa;
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// With unsigned of larger scale
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// CHECK: [[SA:%[0-9]+]] = load i16, i16* %sa, align 2
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// CHECK-NEXT: [[USA:%[0-9]+]] = load i32, i32* %ua, align 4
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// SIGNED-NEXT: [[SA_EXT:%[a-z0-9]+]] = sext i16 [[SA]] to i33
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// SIGNED-NEXT: [[SA:%[a-z0-9]+]] = shl i33 [[SA_EXT]], 9
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// SIGNED-NEXT: [[USA_EXT:%[a-z0-9]+]] = zext i32 [[USA]] to i33
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// SIGNED-NEXT: [[SUM:%[0-9]+]] = sub i33 [[SA]], [[USA_EXT]]
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// SIGNED-NEXT: [[RESULT:%[a-z0-9]+]] = ashr i33 [[SUM]], 1
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// SIGNED-NEXT: [[SUM:%[a-z0-9]+]] = trunc i33 [[RESULT]] to i32
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// UNSIGNED-NEXT: [[EXT_SA:%[a-z0-9]+]] = sext i16 [[SA]] to i32
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// UNSIGNED-NEXT: [[SA:%[a-z0-9]+]] = shl i32 [[EXT_SA]], 8
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// UNSIGNED-NEXT: [[SUM:%[0-9]+]] = sub i32 [[SA]], [[USA]]
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// CHECK-NEXT: store i32 [[SUM]], i32* %a, align 4
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a = sa - ua;
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// With unsigned of smaller width
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// CHECK: [[SA:%[0-9]+]] = load i16, i16* %sa, align 2
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// CHECK-NEXT: [[USF:%[0-9]+]] = load i8, i8* %usf, align 1
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// SIGNED-NEXT: [[SA_EXT:%[a-z0-9]+]] = sext i16 [[SA]] to i17
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// SIGNED-NEXT: [[SA:%[a-z0-9]+]] = shl i17 [[SA_EXT]], 1
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// SIGNED-NEXT: [[USF_EXT:%[a-z0-9]+]] = zext i8 [[USF]] to i17
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// SIGNED-NEXT: [[SUM:%[0-9]+]] = sub i17 [[SA]], [[USF_EXT]]
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// SIGNED-NEXT: [[RESULT:%[a-z0-9]+]] = ashr i17 [[SUM]], 1
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// SIGNED-NEXT: [[SUM:%[a-z0-9]+]] = trunc i17 [[RESULT]] to i16
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// UNSIGNED-NEXT: [[EXT_USF:%[a-z0-9]+]] = zext i8 [[USF]] to i16
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// UNSIGNED-NEXT: [[SUM:%[0-9]+]] = sub i16 [[SA]], [[EXT_USF]]
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// CHECK-NEXT: store i16 [[SUM]], i16* %sa, align 2
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sa = sa - usf;
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// With unsigned of larger width and smaller scale
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// CHECK: [[SA:%[0-9]+]] = load i16, i16* %sa, align 2
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// CHECK-NEXT: [[ULF:%[0-9]+]] = load i32, i32* %ulf, align 4
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// SIGNED-NEXT: [[SA_EXT:%[a-z0-9]+]] = sext i16 [[SA]] to i41
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// SIGNED-NEXT: [[SA:%[a-z0-9]+]] = shl i41 [[SA_EXT]], 25
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// SIGNED-NEXT: [[ULF_EXT:%[a-z0-9]+]] = zext i32 [[ULF]] to i41
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// SIGNED-NEXT: [[SUM:%[0-9]+]] = sub i41 [[SA]], [[ULF_EXT]]
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// SIGNED-NEXT: [[RESULT:%[a-z0-9]+]] = ashr i41 [[SUM]], 25
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// SIGNED-NEXT: [[RES_TRUNC:%[a-z0-9]+]] = trunc i41 [[RESULT]] to i16
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// UNSIGNED-NEXT: [[EXT_SA:%[a-z0-9]+]] = sext i16 [[SA]] to i40
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// UNSIGNED-NEXT: [[SA:%[a-z0-9]+]] = shl i40 [[EXT_SA]], 24
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// UNSIGNED-NEXT: [[EXT_ULF:%[a-z0-9]+]] = zext i32 [[ULF]] to i40
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// UNSIGNED-NEXT: [[SUM:%[0-9]+]] = sub i40 [[SA]], [[EXT_ULF]]
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// UNSIGNED-NEXT: [[RES:%[a-z0-9]+]] = ashr i40 [[SUM]], 24
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// UNSIGNED-NEXT: [[RES_TRUNC:%[a-z0-9]+]] = trunc i40 [[RES]] to i16
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// CHECK-NEXT: store i16 [[RES_TRUNC]], i16* %sa, align 2
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sa = sa - ulf;
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// Chained additions of the same signed type should result in the same
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// semantics width.
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// CHECK: [[A:%[0-9]+]] = load i32, i32* %a, align 4
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// CHECK-NEXT: [[B:%[0-9]+]] = load i32, i32* %b, align 4
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// CHECK-NEXT: [[SUM:%[0-9]+]] = sub i32 [[A]], [[B]]
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// CHECK-NEXT: [[C:%[0-9]+]] = load i32, i32* %c, align 4
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// CHECK-NEXT: [[SUM2:%[0-9]+]] = sub i32 [[SUM]], [[C]]
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// CHECK-NEXT: [[D:%[0-9]+]] = load i32, i32* %d, align 4
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// CHECK-NEXT: [[SUM3:%[0-9]+]] = sub i32 [[SUM2]], [[D]]
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// CHECK-NEXT: store i32 [[SUM3]], i32* %a, align 4
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a = a - b - c - d;
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}
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void UnsignedSubtraction() {
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// CHECK-LABEL: UnsignedSubtraction
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unsigned short _Accum usa;
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unsigned _Accum ua;
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unsigned long _Accum ula;
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unsigned short _Fract usf;
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unsigned _Fract uf;
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unsigned long _Fract ulf;
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// CHECK: [[USA:%[0-9]+]] = load i16, i16* %usa, align 2
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// CHECK-NEXT: [[USA2:%[0-9]+]] = load i16, i16* %usa, align 2
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// CHECK-NEXT: [[SUM:%[0-9]+]] = sub i16 [[USA]], [[USA2]]
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// CHECK-NEXT: store i16 [[SUM]], i16* %usa, align 2
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usa = usa - usa;
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// CHECK: [[USA:%[0-9]+]] = load i16, i16* %usa, align 2
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// CHECK-NEXT: [[UA:%[0-9]+]] = load i32, i32* %ua, align 4
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// CHECK-NEXT: [[EXT_USA:%[a-z0-9]+]] = zext i16 [[USA]] to i32
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// CHECK-NEXT: [[USA:%[a-z0-9]+]] = shl i32 [[EXT_USA]], 8
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// CHECK-NEXT: [[SUM:%[0-9]+]] = sub i32 [[USA]], [[UA]]
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// CHECK-NEXT: store i32 [[SUM]], i32* %ua, align 4
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ua = usa - ua;
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// CHECK: [[USA:%[0-9]+]] = load i16, i16* %usa, align 2
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// CHECK-NEXT: [[USF:%[0-9]+]] = load i8, i8* %usf, align 1
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// CHECK-NEXT: [[EXT_USF:%[a-z0-9]+]] = zext i8 [[USF]] to i16
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// CHECK-NEXT: [[SUM:%[0-9]+]] = sub i16 [[USA]], [[EXT_USF]]
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// CHECK-NEXT: store i16 [[SUM]], i16* %usa, align 2
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usa = usa - usf;
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// CHECK: [[USA:%[0-9]+]] = load i16, i16* %usa, align 2
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// CHECK-NEXT: [[UF:%[0-9]+]] = load i16, i16* %uf, align 2
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// CHECK-NEXT: [[USA_EXT:%[a-z0-9]+]] = zext i16 [[USA]] to i24
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// CHECK-NEXT: [[USA:%[a-z0-9]+]] = shl i24 [[USA_EXT]], 8
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// CHECK-NEXT: [[UF_EXT:%[a-z0-9]+]] = zext i16 [[UF]] to i24
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// CHECK-NEXT: [[SUM:%[0-9]+]] = sub i24 [[USA]], [[UF_EXT]]
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// CHECK-NEXT: [[RES:%[a-z0-9]+]] = lshr i24 [[SUM]], 8
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// CHECK-NEXT: [[RES_TRUNC:%[a-z0-9]+]] = trunc i24 [[RES]] to i16
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// CHECK-NEXT: store i16 [[RES_TRUNC]], i16* %usa, align 2
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usa = usa - uf;
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}
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void IntSubtraction() {
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// CHECK-LABEL: IntSubtraction
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short _Accum sa;
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_Accum a;
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unsigned short _Accum usa;
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_Sat short _Accum sa_sat;
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int i;
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unsigned int ui;
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long _Fract lf;
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_Bool b;
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// CHECK: [[SA:%[0-9]+]] = load i16, i16* %sa, align 2
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// CHECK-NEXT: [[I:%[0-9]+]] = load i32, i32* %i, align 4
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// CHECK-NEXT: [[SA_EXT:%[a-z0-9]+]] = sext i16 [[SA]] to i39
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// CHECK-NEXT: [[I_EXT:%[a-z0-9]+]] = sext i32 [[I]] to i39
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// CHECK-NEXT: [[I:%[a-z0-9]+]] = shl i39 [[I_EXT]], 7
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// CHECK-NEXT: [[SUM:%[0-9]+]] = sub i39 [[SA_EXT]], [[I]]
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// CHECK-NEXT: [[RES:%[a-z0-9]+]] = trunc i39 [[SUM]] to i16
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// CHECK-NEXT: store i16 [[RES]], i16* %sa, align 2
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sa = sa - i;
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// CHECK: [[SA:%[0-9]+]] = load i16, i16* %sa, align 2
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// CHECK-NEXT: [[UI:%[0-9]+]] = load i32, i32* %ui, align 4
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// CHECK-NEXT: [[SA_EXT:%[a-z0-9]+]] = sext i16 [[SA]] to i40
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// CHECK-NEXT: [[UI_EXT:%[a-z0-9]+]] = zext i32 [[UI]] to i40
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// CHECK-NEXT: [[UI:%[a-z0-9]+]] = shl i40 [[UI_EXT]], 7
|
||||
// CHECK-NEXT: [[SUM:%[0-9]+]] = sub i40 [[SA_EXT]], [[UI]]
|
||||
// CHECK-NEXT: [[RES:%[a-z0-9]+]] = trunc i40 [[SUM]] to i16
|
||||
// CHECK-NEXT: store i16 [[RES]], i16* %sa, align 2
|
||||
sa = sa - ui;
|
||||
|
||||
// CHECK: [[USA:%[0-9]+]] = load i16, i16* %usa, align 2
|
||||
// CHECK-NEXT: [[I:%[0-9]+]] = load i32, i32* %i, align 4
|
||||
// SIGNED-NEXT: [[USA_EXT:%[a-z0-9]+]] = zext i16 [[USA]] to i40
|
||||
// SIGNED-NEXT: [[I_EXT:%[a-z0-9]+]] = sext i32 [[I]] to i40
|
||||
// SIGNED-NEXT: [[I:%[a-z0-9]+]] = shl i40 [[I_EXT]], 8
|
||||
// SIGNED-NEXT: [[SUM:%[0-9]+]] = sub i40 [[USA_EXT]], [[I]]
|
||||
// SIGNED-NEXT: [[RES:%[a-z0-9]+]] = trunc i40 [[SUM]] to i16
|
||||
// UNSIGNED-NEXT: [[USA_EXT:%[a-z0-9]+]] = zext i16 [[USA]] to i39
|
||||
// UNSIGNED-NEXT: [[I_EXT:%[a-z0-9]+]] = sext i32 [[I]] to i39
|
||||
// UNSIGNED-NEXT: [[I:%[a-z0-9]+]] = shl i39 [[I_EXT]], 7
|
||||
// UNSIGNED-NEXT: [[SUM:%[0-9]+]] = sub i39 [[USA_EXT]], [[I]]
|
||||
// UNSIGNED-NEXT: [[RES:%[a-z0-9]+]] = trunc i39 [[SUM]] to i16
|
||||
// CHECK-NEXT: store i16 [[RES]], i16* %usa, align 2
|
||||
usa = usa - i;
|
||||
|
||||
// CHECK: [[USA:%[0-9]+]] = load i16, i16* %usa, align 2
|
||||
// CHECK-NEXT: [[I:%[0-9]+]] = load i32, i32* %ui, align 4
|
||||
// SIGNED-NEXT: [[USA_EXT:%[a-z0-9]+]] = zext i16 [[USA]] to i40
|
||||
// SIGNED-NEXT: [[I_EXT:%[a-z0-9]+]] = zext i32 [[I]] to i40
|
||||
// SIGNED-NEXT: [[I:%[a-z0-9]+]] = shl i40 [[I_EXT]], 8
|
||||
// SIGNED-NEXT: [[SUM:%[0-9]+]] = sub i40 [[USA_EXT]], [[I]]
|
||||
// SIGNED-NEXT: [[RES:%[a-z0-9]+]] = trunc i40 [[SUM]] to i16
|
||||
// UNSIGNED-NEXT: [[USA_EXT:%[a-z0-9]+]] = zext i16 [[USA]] to i39
|
||||
// UNSIGNED-NEXT: [[I_EXT:%[a-z0-9]+]] = zext i32 [[I]] to i39
|
||||
// UNSIGNED-NEXT: [[I:%[a-z0-9]+]] = shl i39 [[I_EXT]], 7
|
||||
// UNSIGNED-NEXT: [[SUM:%[0-9]+]] = sub i39 [[USA_EXT]], [[I]]
|
||||
// UNSIGNED-NEXT: [[RES:%[a-z0-9]+]] = trunc i39 [[SUM]] to i16
|
||||
// CHECK-NEXT: store i16 [[RES]], i16* %usa, align 2
|
||||
usa = usa - ui;
|
||||
|
||||
// CHECK: [[LF:%[0-9]+]] = load i32, i32* %lf, align 4
|
||||
// CHECK-NEXT: [[UI:%[0-9]+]] = load i32, i32* %ui, align 4
|
||||
// CHECK-NEXT: [[LF_EXT:%[a-z0-9]+]] = sext i32 [[LF]] to i64
|
||||
// CHECK-NEXT: [[UI_EXT:%[a-z0-9]+]] = zext i32 [[UI]] to i64
|
||||
// CHECK-NEXT: [[UI:%[a-z0-9]+]] = shl i64 [[UI_EXT]], 31
|
||||
// CHECK-NEXT: [[SUM:%[0-9]+]] = sub i64 [[LF_EXT]], [[UI]]
|
||||
// CHECK-NEXT: [[RES:%[a-z0-9]+]] = trunc i64 [[SUM]] to i32
|
||||
// CHECK-NEXT: store i32 [[RES]], i32* %lf, align 4
|
||||
lf = lf - ui;
|
||||
|
||||
// CHECK: [[ACCUM:%[0-9]+]] = load i32, i32* %a, align 4
|
||||
// CHECK-NEXT: [[BOOL:%[0-9]+]] = load i8, i8* %b, align 1
|
||||
// CHECK-NEXT: [[AS_BOOL:%[a-z0-9]+]] = trunc i8 [[BOOL]] to i1
|
||||
// CHECK-NEXT: [[BOOL_EXT:%[a-z0-9]+]] = zext i1 [[AS_BOOL]] to i32
|
||||
// CHECK-NEXT: [[ACCUM_EXT:%[a-z0-9]+]] = sext i32 [[ACCUM]] to i47
|
||||
// CHECK-NEXT: [[BOOL:%[a-z0-9]+]] = sext i32 [[BOOL_EXT]] to i47
|
||||
// CHECK-NEXT: [[BOOL_EXT:%[a-z0-9]+]] = shl i47 [[BOOL]], 15
|
||||
// CHECK-NEXT: [[SUM:%[0-9]+]] = sub i47 [[ACCUM_EXT]], [[BOOL_EXT]]
|
||||
// CHECK-NEXT: [[RESULT:%[a-z0-9]+]] = trunc i47 [[SUM]] to i32
|
||||
// CHECK-NEXT: store i32 [[RESULT]], i32* %a, align 4
|
||||
a = a - b;
|
||||
}
|
||||
|
||||
void SaturatedSubtraction() {
|
||||
// CHECK-LABEL: SaturatedSubtraction
|
||||
short _Accum sa;
|
||||
_Accum a;
|
||||
long _Accum la;
|
||||
unsigned short _Accum usa;
|
||||
unsigned _Accum ua;
|
||||
unsigned long _Accum ula;
|
||||
|
||||
_Sat short _Accum sa_sat;
|
||||
_Sat _Accum a_sat;
|
||||
_Sat long _Accum la_sat;
|
||||
_Sat unsigned short _Accum usa_sat;
|
||||
_Sat unsigned _Accum ua_sat;
|
||||
_Sat unsigned long _Accum ula_sat;
|
||||
_Sat unsigned _Fract uf_sat;
|
||||
|
||||
int i;
|
||||
unsigned int ui;
|
||||
|
||||
// CHECK: [[SA:%[0-9]+]] = load i16, i16* %sa, align 2
|
||||
// CHECK-NEXT: [[SA_SAT:%[0-9]+]] = load i16, i16* %sa_sat, align 2
|
||||
// CHECK-NEXT: [[SUM:%[0-9]+]] = call i16 @llvm.ssub.sat.i16(i16 [[SA]], i16
|
||||
// [[SA_SAT]])
|
||||
// CHECK-NEXT: store i16 [[SUM]], i16* %sa_sat, align 2
|
||||
sa_sat = sa - sa_sat;
|
||||
|
||||
// CHECK: [[USA:%[0-9]+]] = load i16, i16* %usa, align 2
|
||||
// CHECK-NEXT: [[USA_SAT:%[0-9]+]] = load i16, i16* %usa_sat, align 2
|
||||
// SIGNED-NEXT: [[SUM:%[0-9]+]] = call i16 @llvm.usub.sat.i16(i16 [[USA]], i16 [[USA_SAT]])
|
||||
// SIGNED-NEXT: store i16 [[SUM]], i16* %usa_sat, align 2
|
||||
// UNSIGNED-NEXT: [[USA_TRUNC:%[a-z0-9]+]] = trunc i16 [[USA]] to i15
|
||||
// UNSIGNED-NEXT: [[USA_SAT_TRUNC:%[a-z0-9]+]] = trunc i16 [[USA_SAT]] to i15
|
||||
// UNSIGNED-NEXT: [[SUM:%[0-9]+]] = call i15 @llvm.usub.sat.i15(i15 [[USA_TRUNC]], i15 [[USA_SAT_TRUNC]])
|
||||
// UNSIGNED-NEXT: [[SUM_EXT:%[a-z0-9]+]] = zext i15 [[SUM]] to i16
|
||||
// UNSIGNED-NEXT: store i16 [[SUM_EXT]], i16* %usa_sat, align 2
|
||||
usa_sat = usa - usa_sat;
|
||||
|
||||
// CHECK: [[UA:%[0-9]+]] = load i32, i32* %ua, align 4
|
||||
// CHECK-NEXT: [[USA:%[0-9]+]] = load i16, i16* %usa_sat, align 2
|
||||
// SIGNED-NEXT: [[USA_EXT:%[a-z0-9]+]] = zext i16 [[USA]] to i32
|
||||
// SIGNED-NEXT: [[USA:%[a-z0-9]+]] = shl i32 [[USA_EXT]], 8
|
||||
// SIGNED-NEXT: [[SUM:%[0-9]+]] = call i32 @llvm.usub.sat.i32(i32 [[UA]], i32 [[USA]])
|
||||
// SIGNED-NEXT: store i32 [[SUM]], i32* %ua_sat, align 4
|
||||
// UNSIGNED-NEXT: [[UA_TRUNC:%[a-z0-9]+]] = trunc i32 [[UA]] to i31
|
||||
// UNSIGNED-NEXT: [[USA_EXT:%[a-z0-9]+]] = zext i16 [[USA]] to i31
|
||||
// UNSIGNED-NEXT: [[USA:%[a-z0-9]+]] = shl i31 [[USA_EXT]], 8
|
||||
// UNSIGNED-NEXT: [[SUM:%[0-9]+]] = call i31 @llvm.usub.sat.i31(i31 [[UA_TRUNC]], i31 [[USA]])
|
||||
// UNSIGNED-NEXT: [[SUM_EXT:%[a-z0-9]+]] = zext i31 [[SUM]] to i32
|
||||
// UNSIGNED-NEXT: store i32 [[SUM_EXT]], i32* %ua_sat, align 4
|
||||
ua_sat = ua - usa_sat;
|
||||
|
||||
// CHECK: [[SA_SAT:%[0-9]+]] = load i16, i16* %sa_sat, align 2
|
||||
// CHECK-NEXT: [[I:%[0-9]+]] = load i32, i32* %i, align 4
|
||||
// CHECK-NEXT: [[SA_SAT_EXT:%[a-z0-9]+]] = sext i16 [[SA_SAT]] to i39
|
||||
// CHECK-NEXT: [[I_EXT:%[a-z0-9]+]] = sext i32 [[I]] to i39
|
||||
// CHECK-NEXT: [[I:%[a-z0-9]+]] = shl i39 [[I_EXT]], 7
|
||||
// CHECK-NEXT: [[SUM:%[0-9]+]] = call i39 @llvm.ssub.sat.i39(i39 [[SA_SAT_EXT]], i39 [[I]])
|
||||
// CHECK-NEXT: [[USE_MAX:%[0-9]+]] = icmp sgt i39 [[SUM]], 32767
|
||||
// CHECK-NEXT: [[RES:%[a-z0-9]+]] = select i1 [[USE_MAX]], i39 32767, i39 [[SUM]]
|
||||
// CHECK-NEXT: [[USE_MIN:%[0-9]+]] = icmp slt i39 [[RES]], -32768
|
||||
// CHECK-NEXT: [[RES2:%[a-z0-9]+]] = select i1 [[USE_MIN]], i39 -32768, i39 [[RES]]
|
||||
// CHECK-NEXT: [[RES3:%[a-z0-9]+]] = trunc i39 [[RES2]] to i16
|
||||
// CHECK-NEXT: store i16 [[RES3]], i16* %sa_sat, align 2
|
||||
sa_sat = sa_sat - i;
|
||||
|
||||
// CHECK: [[SA_SAT:%[0-9]+]] = load i16, i16* %sa_sat, align 2
|
||||
// CHECK-NEXT: [[I:%[0-9]+]] = load i32, i32* %ui, align 4
|
||||
// CHECK-NEXT: [[SA_SAT_EXT:%[a-z0-9]+]] = sext i16 [[SA_SAT]] to i40
|
||||
// CHECK-NEXT: [[I_EXT:%[a-z0-9]+]] = zext i32 [[I]] to i40
|
||||
// CHECK-NEXT: [[I:%[a-z0-9]+]] = shl i40 [[I_EXT]], 7
|
||||
// CHECK-NEXT: [[SUM:%[0-9]+]] = call i40 @llvm.ssub.sat.i40(i40 [[SA_SAT_EXT]], i40 [[I]])
|
||||
// CHECK-NEXT: [[USE_MAX:%[0-9]+]] = icmp sgt i40 [[SUM]], 32767
|
||||
// CHECK-NEXT: [[RES:%[a-z0-9]+]] = select i1 [[USE_MAX]], i40 32767, i40 [[SUM]]
|
||||
// CHECK-NEXT: [[USE_MIN:%[0-9]+]] = icmp slt i40 [[RES]], -32768
|
||||
// CHECK-NEXT: [[RES2:%[a-z0-9]+]] = select i1 [[USE_MIN]], i40 -32768, i40 [[RES]]
|
||||
// CHECK-NEXT: [[RES3:%[a-z0-9]+]] = trunc i40 [[RES2]] to i16
|
||||
// CHECK-NEXT: store i16 [[RES3]], i16* %sa_sat, align 2
|
||||
sa_sat = sa_sat - ui;
|
||||
|
||||
// CHECK: [[UF_SAT:%[0-9]+]] = load i16, i16* %uf_sat, align 2
|
||||
// CHECK-NEXT: [[UF_SAT2:%[0-9]+]] = load i16, i16* %uf_sat, align 2
|
||||
// SIGNED-NEXT: [[SUM:%[0-9]+]] = call i16 @llvm.usub.sat.i16(i16 [[UF_SAT]], i16 [[UF_SAT2]])
|
||||
// SIGNED-NEXT: store i16 [[SUM]], i16* %uf_sat, align 2
|
||||
// UNSIGNED-NEXT: [[UF_SAT_TRUNC:%[a-z0-9]+]] = trunc i16 [[UF_SAT]] to i15
|
||||
// UNSIGNED-NEXT: [[UF_SAT_TRUNC2:%[a-z0-9]+]] = trunc i16 [[UF_SAT2]] to i15
|
||||
// UNSIGNED-NEXT: [[SUM:%[0-9]+]] = call i15 @llvm.usub.sat.i15(i15 [[UF_SAT_TRUNC]], i15 [[UF_SAT_TRUNC2]])
|
||||
// UNSIGNED-NEXT: [[SUM_EXT:%[a-z0-9]+]] = zext i15 [[SUM]] to i16
|
||||
// UNSIGNED-NEXT: store i16 [[SUM_EXT]], i16* %uf_sat, align 2
|
||||
uf_sat = uf_sat - uf_sat;
|
||||
|
||||
// CHECK: [[USA_SAT:%[0-9]+]] = load i16, i16* %usa_sat, align 2
|
||||
// CHECK-NEXT: [[I:%[0-9]+]] = load i32, i32* %i, align 4
|
||||
// SIGNED-NEXT: [[USA_SAT_RESIZE:%[a-z0-9]+]] = zext i16 [[USA_SAT]] to i40
|
||||
// SIGNED-NEXT: [[I_RESIZE:%[a-z0-9]+]] = sext i32 [[I]] to i40
|
||||
// SIGNED-NEXT: [[I_UPSCALE:%[a-z0-9]+]] = shl i40 [[I_RESIZE]], 8
|
||||
// SIGNED-NEXT: [[SUM:%[0-9]+]] = call i40 @llvm.usub.sat.i40(i40 [[USA_SAT_RESIZE]], i40 [[I_UPSCALE]])
|
||||
// SIGNED-NEXT: [[USE_MAX:%[0-9]+]] = icmp sgt i40 [[SUM]], 65535
|
||||
// SIGNED-NEXT: [[RESULT:%[a-z0-9]+]] = select i1 [[USE_MAX]], i40 65535, i40 [[SUM]]
|
||||
// SIGNED-NEXT: [[USE_MIN:%[0-9]+]] = icmp slt i40 [[RESULT]], 0
|
||||
// SIGNED-NEXT: [[RESULT2:%[a-z0-9]+]] = select i1 [[USE_MIN]], i40 0, i40 [[RESULT]]
|
||||
// SIGNED-NEXT: [[RESULT:%[a-z0-9]+]] = trunc i40 [[RESULT2]] to i16
|
||||
// UNSIGNED-NEXT: [[USA_SAT_RESIZE:%[a-z0-9]+]] = zext i16 [[USA_SAT]] to i39
|
||||
// UNSIGNED-NEXT: [[I_RESIZE:%[a-z0-9]+]] = sext i32 [[I]] to i39
|
||||
// UNSIGNED-NEXT: [[I_UPSCALE:%[a-z0-9]+]] = shl i39 [[I_RESIZE]], 7
|
||||
// UNSIGNED-NEXT: [[SUM:%[0-9]+]] = call i39 @llvm.usub.sat.i39(i39 [[USA_SAT_RESIZE]], i39 [[I_UPSCALE]])
|
||||
// UNSIGNED-NEXT: [[USE_MAX:%[0-9]+]] = icmp sgt i39 [[SUM]], 32767
|
||||
// UNSIGNED-NEXT: [[RESULT:%[a-z0-9]+]] = select i1 [[USE_MAX]], i39 32767, i39 [[SUM]]
|
||||
// UNSIGNED-NEXT: [[USE_MIN:%[0-9]+]] = icmp slt i39 [[RESULT]], 0
|
||||
// UNSIGNED-NEXT: [[RESULT2:%[a-z0-9]+]] = select i1 [[USE_MIN]], i39 0, i39 [[RESULT]]
|
||||
// UNSIGNED-NEXT: [[RESULT:%[a-z0-9]+]] = trunc i39 [[RESULT2]] to i16
|
||||
// CHECK-NEXT: store i16 [[RESULT]], i16* %usa_sat, align 2
|
||||
usa_sat = usa_sat - i;
|
||||
}
|
||||
Loading…
Reference in New Issue