llvm/test/CodeGen/NVPTX/fp-fold-sub.ll

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 6
; RUN: llc < %s -mtriple=nvptx64 -mcpu=sm_20 | FileCheck %s
; RUN: llc < %s -mtriple=nvptx64 -mcpu=sm_53 -mattr=+ptx60 | FileCheck %s
; RUN: %if ptxas-sm_20 %{ llc < %s -mtriple=nvptx64 -mcpu=sm_20 | %ptxas-verify -arch=sm_20 %}

define float @sub_f32(float %a, float %b) {
; CHECK-LABEL: sub_f32(
; CHECK:       {
; CHECK-NEXT:    .reg .b32 %r<9>;
; CHECK-EMPTY:
; CHECK-NEXT:  // %bb.0:
; CHECK-NEXT:    ld.param.b32 %r1, [sub_f32_param_0];
; CHECK-NEXT:    ld.param.b32 %r2, [sub_f32_param_1];
; CHECK-NEXT:    sub.rn.f32 %r3, %r1, %r2;
; CHECK-NEXT:    sub.rn.ftz.f32 %r4, %r1, %r3;
; CHECK-NEXT:    sub.rz.f32 %r5, %r1, %r4;
; CHECK-NEXT:    sub.rz.ftz.f32 %r6, %r1, %r5;
; CHECK-NEXT:    sub.rm.f32 %r7, %r1, %r6;
; CHECK-NEXT:    sub.rm.ftz.f32 %r8, %r1, %r7;
; CHECK-NEXT:    st.param.b32 [func_retval0], %r8;
; CHECK-NEXT:    ret;
  %f0 = fneg float %b
  %r1 = call float @llvm.nvvm.add.rn.f(float %a, float %f0)

  %f1 = fneg float %r1
  %r2 = call float @llvm.nvvm.add.rn.ftz.f(float %a, float %f1)

  %f2 = fneg float %r2
  %r3 = call float @llvm.nvvm.add.rz.f(float %a, float %f2)

  %f3 = fneg float %r3
  %r4 = call float @llvm.nvvm.add.rz.ftz.f(float %a, float %f3)

  %f4 = fneg float %r4
  %r5 = call float @llvm.nvvm.add.rm.f(float %a, float %f4)

  %f5 = fneg float %r5
  %r6 = call float @llvm.nvvm.add.rm.ftz.f(float %a, float %f5)

  ret float %r6
}

define double @sub_f64(double %a, double %b) {
; CHECK-LABEL: sub_f64(
; CHECK:       {
; CHECK-NEXT:    .reg .b64 %rd<7>;
; CHECK-EMPTY:
; CHECK-NEXT:  // %bb.0:
; CHECK-NEXT:    ld.param.b64 %rd1, [sub_f64_param_0];
; CHECK-NEXT:    ld.param.b64 %rd2, [sub_f64_param_1];
; CHECK-NEXT:    sub.rn.f64 %rd3, %rd1, %rd2;
; CHECK-NEXT:    sub.rz.f64 %rd4, %rd1, %rd3;
; CHECK-NEXT:    sub.rm.f64 %rd5, %rd1, %rd4;
; CHECK-NEXT:    sub.rp.f64 %rd6, %rd1, %rd5;
; CHECK-NEXT:    st.param.b64 [func_retval0], %rd6;
; CHECK-NEXT:    ret;
  %f0 = fneg double %b
  %r1 = call double @llvm.nvvm.add.rn.d(double %a, double %f0)

  %f1 = fneg double %r1
  %r2 = call double @llvm.nvvm.add.rz.d(double %a, double %f1)

  %f2 = fneg double %r2
  %r3 = call double @llvm.nvvm.add.rm.d(double %a, double %f2)

  %f3 = fneg double %r3
  %r4 = call double @llvm.nvvm.add.rp.d(double %a, double %f3)

  ret double %r4
}