llvm/test/CodeGen/AMDGPU/fmax3.ll

; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck -check-prefixes=GCN,SI %s
; RUN: llc -march=amdgcn -mcpu=tonga -mattr=-flat-for-global -verify-machineinstrs < %s | FileCheck -check-prefixes=GCN,VI %s
; RUN: llc -march=amdgcn -mcpu=gfx900 -mattr=-flat-for-global -verify-machineinstrs < %s | FileCheck -check-prefixes=GCN,GFX9 %s

; GCN-LABEL: {{^}}test_fmax3_olt_0_f32:
; GCN: buffer_load_dword [[REGC:v[0-9]+]]
; GCN: buffer_load_dword [[REGB:v[0-9]+]]
; GCN: buffer_load_dword [[REGA:v[0-9]+]]
; GCN: v_max3_f32 [[RESULT:v[0-9]+]], [[REGC]], [[REGB]], [[REGA]]
; GCN: buffer_store_dword [[RESULT]],
; GCN: s_endpgm
define amdgpu_kernel void @test_fmax3_olt_0_f32(float addrspace(1)* %out, float addrspace(1)* %aptr, float addrspace(1)* %bptr, float addrspace(1)* %cptr) #0 {
  %a = load volatile  float, float addrspace(1)* %aptr, align 4
  %b = load volatile float, float addrspace(1)* %bptr, align 4
  %c = load volatile float, float addrspace(1)* %cptr, align 4
  %f0 = call float @llvm.maxnum.f32(float %a, float %b)
  %f1 = call float @llvm.maxnum.f32(float %f0, float %c)
  store float %f1, float addrspace(1)* %out, align 4
  ret void
}

; Commute operand of second fmax
; GCN-LABEL: {{^}}test_fmax3_olt_1_f32:
; GCN: buffer_load_dword [[REGB:v[0-9]+]]
; GCN: buffer_load_dword [[REGA:v[0-9]+]]
; GCN: buffer_load_dword [[REGC:v[0-9]+]]
; GCN: v_max3_f32 [[RESULT:v[0-9]+]], [[REGC]], [[REGB]], [[REGA]]
; GCN: buffer_store_dword [[RESULT]],
; GCN: s_endpgm
define amdgpu_kernel void @test_fmax3_olt_1_f32(float addrspace(1)* %out, float addrspace(1)* %aptr, float addrspace(1)* %bptr, float addrspace(1)* %cptr) #0 {
  %a = load volatile float, float addrspace(1)* %aptr, align 4
  %b = load volatile float, float addrspace(1)* %bptr, align 4
  %c = load volatile float, float addrspace(1)* %cptr, align 4
  %f0 = call float @llvm.maxnum.f32(float %a, float %b)
  %f1 = call float @llvm.maxnum.f32(float %c, float %f0)
  store float %f1, float addrspace(1)* %out, align 4
  ret void
}

; GCN-LABEL: {{^}}test_fmax3_olt_0_f16:
; GCN: buffer_load_ushort [[REGC:v[0-9]+]]
; GCN: buffer_load_ushort [[REGB:v[0-9]+]]
; GCN: buffer_load_ushort [[REGA:v[0-9]+]]

; SI: v_max3_f32 [[RESULT_F32:v[0-9]+]],
; SI: v_cvt_f16_f32_e32 [[RESULT:v[0-9]+]], [[RESULT]]

; VI: v_max_f16_e32
; VI: v_max_f16_e32 [[RESULT:v[0-9]+]],

; GFX9: v_max3_f16 [[RESULT:v[0-9]+]], [[REGC]], [[REGB]], [[REGA]]
; GCN: buffer_store_short [[RESULT]],
define amdgpu_kernel void @test_fmax3_olt_0_f16(half addrspace(1)* %out, half addrspace(1)* %aptr, half addrspace(1)* %bptr, half addrspace(1)* %cptr) #0 {
  %a = load volatile  half, half addrspace(1)* %aptr, align 2
  %b = load volatile half, half addrspace(1)* %bptr, align 2
  %c = load volatile half, half addrspace(1)* %cptr, align 2
  %f0 = call half @llvm.maxnum.f16(half %a, half %b)
  %f1 = call half @llvm.maxnum.f16(half %f0, half %c)
  store half %f1, half addrspace(1)* %out, align 2
  ret void
}

; Commute operand of second fmax
; GCN-LABEL: {{^}}test_fmax3_olt_1_f16:
; GCN: buffer_load_ushort [[REGB:v[0-9]+]]
; GCN: buffer_load_ushort [[REGA:v[0-9]+]]
; GCN: buffer_load_ushort [[REGC:v[0-9]+]]

; SI: v_max3_f32 [[RESULT_F32:v[0-9]+]],
; SI: v_cvt_f16_f32_e32 [[RESULT:v[0-9]+]], [[RESULT]]

; VI: v_max_f16_e32
; VI: v_max_f16_e32 [[RESULT:v[0-9]+]],

; GFX9: v_max3_f16 [[RESULT:v[0-9]+]], [[REGC]], [[REGB]], [[REGA]]
; GCN: buffer_store_short [[RESULT]],
define amdgpu_kernel void @test_fmax3_olt_1_f16(half addrspace(1)* %out, half addrspace(1)* %aptr, half addrspace(1)* %bptr, half addrspace(1)* %cptr) #0 {
  %a = load volatile half, half addrspace(1)* %aptr, align 2
  %b = load volatile half, half addrspace(1)* %bptr, align 2
  %c = load volatile half, half addrspace(1)* %cptr, align 2
  %f0 = call half @llvm.maxnum.f16(half %a, half %b)
  %f1 = call half @llvm.maxnum.f16(half %c, half %f0)
  store half %f1, half addrspace(1)* %out, align 2
  ret void
}

declare i32 @llvm.amdgcn.workitem.id.x() #1
declare float @llvm.maxnum.f32(float, float) #1
declare half @llvm.maxnum.f16(half, half) #1

attributes #0 = { nounwind }
attributes #1 = { nounwind readnone speculatable }