[VE] Support copysign math function

[kaz7]

Summary

VE doesn't have instruction for copysign, so expand it. Add a
regression test also.

llvm/lib/Target/VE/VEISelLowering.cpp

VETargetLowering::VETargetLowering(const TargetMachine &TM,
   setOperationAction(ISD::FDIV, MVT::f128, Expand);
 
   for (MVT FPVT : {MVT::f32, MVT::f64}) {
     // f32 and f64 uses ConstantFP.  f128 uses ConstantPool.
     setOperationAction(ISD::ConstantFP, FPVT, Legal);
   }
   /// } Floating-point Ops
 
+  /// Floating-point math functions {
+
+  // VE doesn't have following floating point math functions.
+  for (MVT VT : MVT::fp_valuetypes()) {
+    setOperationAction(ISD::FCOPYSIGN, VT, Expand);
+  }
+
+  /// } Floating-point math functions
+
   setStackPointerRegisterToSaveRestore(VE::SX11);
 
   // We have target-specific dag combine patterns for the following nodes:
   setTargetDAGCombine(ISD::TRUNCATE);
 
   // Set function alignment to 16 bytes
   setMinFunctionAlignment(Align(16));
 

llvm/test/CodeGen/VE/fp_copysign.ll

+; RUN: llc < %s -mtriple=ve | FileCheck %s
+
+;;; Test ‘llvm.copysign.*’ Intrinsic
+;;;
+;;; Syntax:
+;;;   This is an overloaded intrinsic. You can use llvm.copysign on any
+;;;   floating-point or vector of floating-point type. Not all targets
+;;;   support all types however.
+;;;
+;;; declare float     @llvm.copysign.f32(float  %Mag, float  %Sgn)
+;;; declare double    @llvm.copysign.f64(double %Mag, double %Sgn)
+;;; declare x86_fp80  @llvm.copysign.f80(x86_fp80  %Mag, x86_fp80  %Sgn)
+;;; declare fp128     @llvm.copysign.f128(fp128 %Mag, fp128 %Sgn)
+;;; declare ppc_fp128 @llvm.copysign.ppcf128(ppc_fp128  %Mag, ppc_fp128  %Sgn)
+;;;
+;;; Overview:
+;;;   The ‘llvm.copysign.*’ intrinsics return a value with the magnitude of
+;;;   the first operand and the sign of the second operand.
+;;;
+;;; Arguments:
+;;;   The arguments and return value are floating-point numbers of the same
+;;;   type.
+;;;
+;;; Semantics:
+;;;   This function returns the same values as the libm copysign functions
+;;;   would, and handles error conditions in the same way.
+;;;
+;;; Note:
+;;;   We test only float/double/fp128.
+
+; Function Attrs: nounwind readnone
+define float @copysign_float_var(float %0, float %1) {
+; CHECK-LABEL: copysign_float_var:
+; CHECK:       .LBB{{[0-9]+}}_2:
+; CHECK-NEXT:    sra.l %s1, %s1, 32
+; CHECK-NEXT:    lea %s2, -2147483648
+; CHECK-NEXT:    and %s2, %s2, (32)0
+; CHECK-NEXT:    and %s1, %s1, %s2
+; CHECK-NEXT:    sra.l %s0, %s0, 32
+; CHECK-NEXT:    and %s0, %s0, (33)0
+; CHECK-NEXT:    or %s0, %s0, %s1
+; CHECK-NEXT:    sll %s0, %s0, 32
+; CHECK-NEXT:    or %s11, 0, %s9
+  %3 = tail call float @llvm.copysign.f32(float %0, float %1)
+  ret float %3
+}
+
+; Function Attrs: nounwind readnone speculatable willreturn
+declare float @llvm.copysign.f32(float, float)
+
+; Function Attrs: nounwind readnone
+define double @copysign_double_var(double %0, double %1) {
+; CHECK-LABEL: copysign_double_var:
+; CHECK:       .LBB{{[0-9]+}}_2:
+; CHECK-NEXT:    and %s1, %s1, (1)1
+; CHECK-NEXT:    and %s0, %s0, (1)0
+; CHECK-NEXT:    or %s0, %s0, %s1
+; CHECK-NEXT:    or %s11, 0, %s9
+  %3 = tail call double @llvm.copysign.f64(double %0, double %1)
+  ret double %3
+}
+
+; Function Attrs: nounwind readnone speculatable willreturn
+declare double @llvm.copysign.f64(double, double)
+
+; Function Attrs: nounwind readnone
+define fp128 @copysign_quad_var(fp128 %0, fp128 %1) {
+; CHECK-LABEL: copysign_quad_var:
+; CHECK:       .LBB{{[0-9]+}}_2:
+; CHECK-NEXT:    st %s3, 192(, %s11)
+; CHECK-NEXT:    st %s2, 200(, %s11)
+; CHECK-NEXT:    st %s1, 176(, %s11)
+; CHECK-NEXT:    st %s0, 184(, %s11)
+; CHECK-NEXT:    ld1b.zx %s0, 207(, %s11)
+; CHECK-NEXT:    ld1b.zx %s1, 191(, %s11)
+; CHECK-NEXT:    lea %s2, 128
+; CHECK-NEXT:    and %s0, %s0, %s2
+; CHECK-NEXT:    and %s1, %s1, (57)0
+; CHECK-NEXT:    or %s0, %s1, %s0
+; CHECK-NEXT:    st1b %s0, 191(, %s11)
+; CHECK-NEXT:    ld %s1, 176(, %s11)
+; CHECK-NEXT:    ld %s0, 184(, %s11)
+; CHECK-NEXT:    or %s11, 0, %s9
+  %3 = tail call fp128 @llvm.copysign.f128(fp128 %0, fp128 %1)
+  ret fp128 %3
+}
+
+; Function Attrs: nounwind readnone speculatable willreturn
+declare fp128 @llvm.copysign.f128(fp128, fp128)
+
+; Function Attrs: nounwind readnone
+define float @copysign_float_zero(float %0) {
+; CHECK-LABEL: copysign_float_zero:
+; CHECK:       .LBB{{[0-9]+}}_2:
+; CHECK-NEXT:    sra.l %s0, %s0, 32
+; CHECK-NEXT:    lea %s1, -2147483648
+; CHECK-NEXT:    and %s1, %s1, (32)0
+; CHECK-NEXT:    and %s0, %s0, %s1
+; CHECK-NEXT:    sll %s0, %s0, 32
+; CHECK-NEXT:    or %s11, 0, %s9
+  %2 = tail call float @llvm.copysign.f32(float 0.000000e+00, float %0)
+  ret float %2
+}
+
+; Function Attrs: nounwind readnone
+define double @copysign_double_zero(double %0) {
+; CHECK-LABEL: copysign_double_zero:
+; CHECK:       .LBB{{[0-9]+}}_2:
+; CHECK-NEXT:    and %s0, %s0, (1)1
+; CHECK-NEXT:    or %s11, 0, %s9
+  %2 = tail call double @llvm.copysign.f64(double 0.000000e+00, double %0)
+  ret double %2
+}
+
+; Function Attrs: nounwind readnone
+define fp128 @copysign_quad_zero(fp128 %0) {
+; CHECK-LABEL: copysign_quad_zero:
+; CHECK:       .LBB{{[0-9]+}}_2:
+; CHECK-NEXT:    lea %s2, .LCPI{{[0-9]+}}_0@lo
+; CHECK-NEXT:    and %s2, %s2, (32)0
+; CHECK-NEXT:    lea.sl %s2, .LCPI{{[0-9]+}}_0@hi(, %s2)
+; CHECK-NEXT:    ld %s4, 8(, %s2)
+; CHECK-NEXT:    ld %s5, (, %s2)
+; CHECK-NEXT:    st %s1, 192(, %s11)
+; CHECK-NEXT:    st %s0, 200(, %s11)
+; CHECK-NEXT:    st %s5, 176(, %s11)
+; CHECK-NEXT:    st %s4, 184(, %s11)
+; CHECK-NEXT:    ld1b.zx %s0, 207(, %s11)
+; CHECK-NEXT:    ld1b.zx %s1, 191(, %s11)
+; CHECK-NEXT:    lea %s2, 128
+; CHECK-NEXT:    and %s0, %s0, %s2
+; CHECK-NEXT:    and %s1, %s1, (57)0
+; CHECK-NEXT:    or %s0, %s1, %s0
+; CHECK-NEXT:    st1b %s0, 191(, %s11)
+; CHECK-NEXT:    ld %s1, 176(, %s11)
+; CHECK-NEXT:    ld %s0, 184(, %s11)
+; CHECK-NEXT:    or %s11, 0, %s9
+  %2 = tail call fp128 @llvm.copysign.f128(fp128 0xL00000000000000000000000000000000, fp128 %0)
+  ret fp128 %2
+}
+
+; Function Attrs: nounwind readnone
+define float @copysign_float_const(float %0) {
+; CHECK-LABEL: copysign_float_const:
+; CHECK:       .LBB{{[0-9]+}}_2:
+; CHECK-NEXT:    sra.l %s0, %s0, 32
+; CHECK-NEXT:    lea %s1, -2147483648
+; CHECK-NEXT:    and %s1, %s1, (32)0
+; CHECK-NEXT:    and %s0, %s0, %s1
+; CHECK-NEXT:    lea %s1, 1073741824
+; CHECK-NEXT:    or %s0, %s0, %s1
+; CHECK-NEXT:    sll %s0, %s0, 32
+; CHECK-NEXT:    or %s11, 0, %s9
+  %2 = tail call float @llvm.copysign.f32(float -2.000000e+00, float %0)
+  ret float %2
+}
+
+; Function Attrs: nounwind readnone
+define double @copysign_double_const(double %0) {
+; CHECK-LABEL: copysign_double_const:
+; CHECK:       .LBB{{[0-9]+}}_2:
+; CHECK-NEXT:    and %s0, %s0, (1)1
+; CHECK-NEXT:    lea.sl %s1, 1073741824
+; CHECK-NEXT:    or %s0, %s0, %s1
+; CHECK-NEXT:    or %s11, 0, %s9
+  %2 = tail call double @llvm.copysign.f64(double -2.000000e+00, double %0)
+  ret double %2
+}
+
+; Function Attrs: nounwind readnone
+define fp128 @copysign_quad_const(fp128 %0) {
+; CHECK-LABEL: copysign_quad_const:
+; CHECK:       .LBB{{[0-9]+}}_2:
+; CHECK-NEXT:    lea %s2, .LCPI{{[0-9]+}}_0@lo
+; CHECK-NEXT:    and %s2, %s2, (32)0
+; CHECK-NEXT:    lea.sl %s2, .LCPI{{[0-9]+}}_0@hi(, %s2)
+; CHECK-NEXT:    ld %s4, 8(, %s2)
+; CHECK-NEXT:    ld %s5, (, %s2)
+; CHECK-NEXT:    st %s1, 192(, %s11)
+; CHECK-NEXT:    st %s0, 200(, %s11)
+; CHECK-NEXT:    st %s5, 176(, %s11)
+; CHECK-NEXT:    st %s4, 184(, %s11)
+; CHECK-NEXT:    ld1b.zx %s0, 207(, %s11)
+; CHECK-NEXT:    ld1b.zx %s1, 191(, %s11)
+; CHECK-NEXT:    lea %s2, 128
+; CHECK-NEXT:    and %s0, %s0, %s2
+; CHECK-NEXT:    and %s1, %s1, (57)0
+; CHECK-NEXT:    or %s0, %s1, %s0
+; CHECK-NEXT:    st1b %s0, 191(, %s11)
+; CHECK-NEXT:    ld %s1, 176(, %s11)
+; CHECK-NEXT:    ld %s0, 184(, %s11)
+; CHECK-NEXT:    or %s11, 0, %s9
+  %2 = tail call fp128 @llvm.copysign.f128(fp128 0xL0000000000000000C000000000000000, fp128 %0)
+  ret fp128 %2
+}