ARM: add some integer/floating point conversion libcalls
Add some Windows on ARM specific library calls. These are provided by msvcrt,
and can be used to perform integer to floating-point conversions (and
vice-versa) mirroring similar functions in the RTABI.
llvm-svn: 208949
diff --git a/llvm/lib/Target/ARM/ARMISelLowering.cpp b/llvm/lib/Target/ARM/ARMISelLowering.cpp
index d5617dd..c2d9b7a 100644
--- a/llvm/lib/Target/ARM/ARMISelLowering.cpp
+++ b/llvm/lib/Target/ARM/ARMISelLowering.cpp
@@ -418,6 +418,28 @@
setLibcallCallingConv(RTLIB::MEMSET, CallingConv::ARM_AAPCS);
}
+ if (Subtarget->isTargetWindows()) {
+ static const struct {
+ const RTLIB::Libcall Op;
+ const char * const Name;
+ const CallingConv::ID CC;
+ } LibraryCalls[] = {
+ { RTLIB::FPTOSINT_F32_I64, "__stoi64", CallingConv::ARM_AAPCS_VFP },
+ { RTLIB::FPTOSINT_F64_I64, "__dtoi64", CallingConv::ARM_AAPCS_VFP },
+ { RTLIB::FPTOUINT_F32_I64, "__stou64", CallingConv::ARM_AAPCS_VFP },
+ { RTLIB::FPTOUINT_F64_I64, "__dtou64", CallingConv::ARM_AAPCS_VFP },
+ { RTLIB::SINTTOFP_I64_F32, "__i64tos", CallingConv::ARM_AAPCS_VFP },
+ { RTLIB::SINTTOFP_I64_F64, "__i64tod", CallingConv::ARM_AAPCS_VFP },
+ { RTLIB::UINTTOFP_I64_F32, "__u64tos", CallingConv::ARM_AAPCS_VFP },
+ { RTLIB::UINTTOFP_I64_F64, "__u64tod", CallingConv::ARM_AAPCS_VFP },
+ };
+
+ for (const auto &LC : LibraryCalls) {
+ setLibcallName(LC.Op, LC.Name);
+ setLibcallCallingConv(LC.Op, LC.CC);
+ }
+ }
+
// Use divmod compiler-rt calls for iOS 5.0 and later.
if (Subtarget->getTargetTriple().isiOS() &&
!Subtarget->getTargetTriple().isOSVersionLT(5, 0)) {
diff --git a/llvm/test/CodeGen/ARM/Windows/integer-floating-point-conversion.ll b/llvm/test/CodeGen/ARM/Windows/integer-floating-point-conversion.ll
new file mode 100644
index 0000000..acf21a1
--- /dev/null
+++ b/llvm/test/CodeGen/ARM/Windows/integer-floating-point-conversion.ll
@@ -0,0 +1,74 @@
+; RUN: llc -mtriple thumbv7-windows -filetype asm -o - %s | FileCheck %s
+
+define arm_aapcs_vfpcc i64 @stoi64(float %f) {
+entry:
+ %conv = fptosi float %f to i64
+ ret i64 %conv
+}
+
+; CHECK-LABEL: stoi64
+; CHECK: bl __stoi64
+
+define arm_aapcs_vfpcc i64 @stou64(float %f) {
+entry:
+ %conv = fptoui float %f to i64
+ ret i64 %conv
+}
+
+; CHECK-LABEL: stou64
+; CHECK: bl __stou64
+
+define arm_aapcs_vfpcc float @i64tos(i64 %i64) {
+entry:
+ %conv = sitofp i64 %i64 to float
+ ret float %conv
+}
+
+; CHECK-LABEL: i64tos
+; CHECK: bl __i64tos
+
+define arm_aapcs_vfpcc float @u64tos(i64 %u64) {
+entry:
+ %conv = uitofp i64 %u64 to float
+ ret float %conv
+}
+
+; CHECK-LABEL: u64tos
+; CHECK: bl __u64tos
+
+define arm_aapcs_vfpcc i64 @dtoi64(double %d) {
+entry:
+ %conv = fptosi double %d to i64
+ ret i64 %conv
+}
+
+; CHECK-LABEL: dtoi64
+; CHECK: bl __dtoi64
+
+define arm_aapcs_vfpcc i64 @dtou64(double %d) {
+entry:
+ %conv = fptoui double %d to i64
+ ret i64 %conv
+}
+
+; CHECK-LABEL: dtou64
+; CHECK: bl __dtou64
+
+define arm_aapcs_vfpcc double @i64tod(i64 %i64) {
+entry:
+ %conv = sitofp i64 %i64 to double
+ ret double %conv
+}
+
+; CHECK-LABEL: i64tod
+; CHECK: bl __i64tod
+
+define arm_aapcs_vfpcc double @u64tod(i64 %i64) {
+entry:
+ %conv = uitofp i64 %i64 to double
+ ret double %conv
+}
+
+; CHECK-LABEL: u64tod
+; CHECK: bl __u64tod
+