llvm-project/llvm/test/CodeGen/AMDGPU/mul_uint24-amdgcn.ll

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

declare i32 @llvm.amdgcn.workitem.id.x() nounwind readnone
declare i32 @llvm.amdgcn.workitem.id.y() nounwind readnone

; FUNC-LABEL: {{^}}test_umul24_i32:
; GCN: v_mul_u32_u24
define amdgpu_kernel void @test_umul24_i32(i32 addrspace(1)* %out, i32 %a, i32 %b) {
entry:
  %0 = shl i32 %a, 8
  %a_24 = lshr i32 %0, 8
  %1 = shl i32 %b, 8
  %b_24 = lshr i32 %1, 8
  %2 = mul i32 %a_24, %b_24
  store i32 %2, i32 addrspace(1)* %out
  ret void
}

; FUNC-LABEL: {{^}}test_umul24_i16_sext:
; SI: v_mul_u32_u24_e{{(32|64)}} [[VI_MUL:v[0-9]]], {{[sv][0-9], [sv][0-9]}}
; SI: v_bfe_i32 v{{[0-9]}}, [[VI_MUL]], 0, 16

; VI: s_mul_i32 [[MUL:s[0-9]+]]
; VI: s_sext_i32_i16 s{{[0-9]+}}, [[MUL]]
define amdgpu_kernel void @test_umul24_i16_sext(i32 addrspace(1)* %out, i16 %a, i16 %b) {
entry:
  %mul = mul i16 %a, %b
  %ext = sext i16 %mul to i32
  store i32 %ext, i32 addrspace(1)* %out
  ret void
}

; FUNC-LABEL: {{^}}test_umul24_i16_vgpr_sext:
; SI: v_mul_u32_u24_e{{(32|64)}} [[MUL:v[0-9]]], {{[sv][0-9], [sv][0-9]}}
; VI: v_mul_lo_u16_e{{(32|64)}} [[MUL:v[0-9]]], {{[sv][0-9], [sv][0-9]}}
; GCN: v_bfe_i32 v{{[0-9]}}, [[MUL]], 0, 16
define amdgpu_kernel void @test_umul24_i16_vgpr_sext(i32 addrspace(1)* %out, i16 addrspace(1)* %in) {
  %tid.x = call i32 @llvm.amdgcn.workitem.id.x()
  %tid.y = call i32 @llvm.amdgcn.workitem.id.y()
  %ptr_a = getelementptr i16, i16 addrspace(1)* %in, i32 %tid.x
  %ptr_b = getelementptr i16, i16 addrspace(1)* %in, i32 %tid.y
  %a = load i16, i16 addrspace(1)* %ptr_a
  %b = load i16, i16 addrspace(1)* %ptr_b
  %mul = mul i16 %a, %b
  %val = sext i16 %mul to i32
  store i32 %val, i32 addrspace(1)* %out
  ret void
}

; FUNC-LABEL: {{^}}test_umul24_i16:
; SI: s_and_b32
; SI: v_mul_u32_u24_e32
; SI: v_and_b32_e32

; VI: s_mul_i32
; VI: s_and_b32
define amdgpu_kernel void @test_umul24_i16(i32 addrspace(1)* %out, i16 %a, i16 %b) {
entry:
  %mul = mul i16 %a, %b
  %ext = zext i16 %mul to i32
  store i32 %ext, i32 addrspace(1)* %out
  ret void
}

; FUNC-LABEL: {{^}}test_umul24_i16_vgpr:
; SI: v_mul_u32_u24_e32
; SI: v_and_b32_e32
; VI: v_mul_lo_u16
define amdgpu_kernel void @test_umul24_i16_vgpr(i32 addrspace(1)* %out, i16 addrspace(1)* %in) {
  %tid.x = call i32 @llvm.amdgcn.workitem.id.x()
  %tid.y = call i32 @llvm.amdgcn.workitem.id.y()
  %ptr_a = getelementptr i16, i16 addrspace(1)* %in, i32 %tid.x
  %ptr_b = getelementptr i16, i16 addrspace(1)* %in, i32 %tid.y
  %a = load i16, i16 addrspace(1)* %ptr_a
  %b = load i16, i16 addrspace(1)* %ptr_b
  %mul = mul i16 %a, %b
  %val = zext i16 %mul to i32
  store i32 %val, i32 addrspace(1)* %out
  ret void
}

; FUNC-LABEL: {{^}}test_umul24_i8_vgpr:
; SI: v_mul_u32_u24_e{{(32|64)}} [[MUL:v[0-9]]], {{[sv][0-9], [sv][0-9]}}
; VI: v_mul_lo_u16_e{{(32|64)}} [[MUL:v[0-9]]], {{[sv][0-9], [sv][0-9]}}
; GCN: v_bfe_i32 v{{[0-9]}}, [[MUL]], 0, 8
define amdgpu_kernel void @test_umul24_i8_vgpr(i32 addrspace(1)* %out, i8 addrspace(1)* %a, i8 addrspace(1)* %b) {
entry:
  %tid.x = call i32 @llvm.amdgcn.workitem.id.x()
  %tid.y = call i32 @llvm.amdgcn.workitem.id.y()
  %a.ptr = getelementptr i8, i8 addrspace(1)* %a, i32 %tid.x
  %b.ptr = getelementptr i8, i8 addrspace(1)* %b, i32 %tid.y
  %a.l = load i8, i8 addrspace(1)* %a.ptr
  %b.l = load i8, i8 addrspace(1)* %b.ptr
  %mul = mul i8 %a.l, %b.l
  %ext = sext i8 %mul to i32
  store i32 %ext, i32 addrspace(1)* %out
  ret void
}

; FUNC-LABEL: {{^}}test_umulhi24_i32_i64:
; GCN-NOT: and
; GCN: v_mul_hi_u32_u24_e32 [[RESULT:v[0-9]+]],
; GCN-NEXT: buffer_store_dword [[RESULT]]
define amdgpu_kernel void @test_umulhi24_i32_i64(i32 addrspace(1)* %out, i32 %a, i32 %b) {
entry:
  %a.24 = and i32 %a, 16777215
  %b.24 = and i32 %b, 16777215
  %a.24.i64 = zext i32 %a.24 to i64
  %b.24.i64 = zext i32 %b.24 to i64
  %mul48 = mul i64 %a.24.i64, %b.24.i64
  %mul48.hi = lshr i64 %mul48, 32
  %mul24hi = trunc i64 %mul48.hi to i32
  store i32 %mul24hi, i32 addrspace(1)* %out
  ret void
}

; FUNC-LABEL: {{^}}test_umulhi24:
; GCN-NOT: and
; GCN: v_mul_hi_u32_u24_e32 [[RESULT:v[0-9]+]],
; GCN-NEXT: buffer_store_dword [[RESULT]]
define amdgpu_kernel void @test_umulhi24(i32 addrspace(1)* %out, i64 %a, i64 %b) {
entry:
  %a.24 = and i64 %a, 16777215
  %b.24 = and i64 %b, 16777215
  %mul48 = mul i64 %a.24, %b.24
  %mul48.hi = lshr i64 %mul48, 32
  %mul24.hi = trunc i64 %mul48.hi to i32
  store i32 %mul24.hi, i32 addrspace(1)* %out
  ret void
}

; Multiply with 24-bit inputs and 64-bit output.
; FUNC-LABEL: {{^}}test_umul24_i64:
; GCN-NOT: and
; GCN-NOT: lshr
; GCN-DAG: v_mul_u32_u24_e32
; GCN-DAG: v_mul_hi_u32_u24_e32
; GCN: buffer_store_dwordx2
define amdgpu_kernel void @test_umul24_i64(i64 addrspace(1)* %out, i64 %a, i64 %b) {
entry:
  %tmp0 = shl i64 %a, 40
  %a_24 = lshr i64 %tmp0, 40
  %tmp1 = shl i64 %b, 40
  %b_24 = lshr i64 %tmp1, 40
  %tmp2 = mul i64 %a_24, %b_24
  store i64 %tmp2, i64 addrspace(1)* %out
  ret void
}

; FUNC-LABEL: {{^}}test_umul24_i64_square:
; GCN: s_load_dword [[A:s[0-9]+]]
; GCN-NOT: s_and_b32
; GCN-DAG: v_mul_hi_u32_u24_e64 v{{[0-9]+}}, [[A]], [[A]]
; GCN-DAG: v_mul_u32_u24_e64 v{{[0-9]+}}, [[A]], [[A]]
define amdgpu_kernel void @test_umul24_i64_square(i64 addrspace(1)* %out, [8 x i32], i64 %a) {
entry:
  %tmp0 = shl i64 %a, 40
  %a.24 = lshr i64 %tmp0, 40
  %tmp2 = mul i64 %a.24, %a.24
  store i64 %tmp2, i64 addrspace(1)* %out
  ret void
}

; FUNC-LABEL: {{^}}test_umulhi16_i32:
; GCN: s_and_b32
; GCN: s_and_b32
; GCN: v_mul_u32_u24_e32 [[MUL24:v[0-9]+]]
; GCN: v_lshrrev_b32_e32 v{{[0-9]+}}, 16, [[MUL24]]
define amdgpu_kernel void @test_umulhi16_i32(i16 addrspace(1)* %out, i32 %a, i32 %b) {
entry:
  %a.16 = and i32 %a, 65535
  %b.16 = and i32 %b, 65535
  %mul = mul i32 %a.16, %b.16
  %hi = lshr i32 %mul, 16
  %mulhi = trunc i32 %hi to i16
  store i16 %mulhi, i16 addrspace(1)* %out
  ret void
}

; FUNC-LABEL: {{^}}test_umul24_i33:
; GCN: s_load_dword s
; GCN: s_load_dword s
; GCN-NOT: and
; GCN-NOT: lshr
; GCN-DAG: v_mul_u32_u24_e32 v[[MUL_LO:[0-9]+]],
; GCN-DAG: v_mul_hi_u32_u24_e32 v[[MUL_HI:[0-9]+]],
; GCN-DAG: v_and_b32_e32 v[[HI:[0-9]+]], 1, v[[MUL_HI]]
; GCN: buffer_store_dwordx2 v{{\[}}[[MUL_LO]]:[[HI]]{{\]}}
define amdgpu_kernel void @test_umul24_i33(i64 addrspace(1)* %out, i33 %a, i33 %b) {
entry:
  %tmp0 = shl i33 %a, 9
  %a_24 = lshr i33 %tmp0, 9
  %tmp1 = shl i33 %b, 9
  %b_24 = lshr i33 %tmp1, 9
  %tmp2 = mul i33 %a_24, %b_24
  %ext = zext i33 %tmp2 to i64
  store i64 %ext, i64 addrspace(1)* %out
  ret void
}

; FUNC-LABEL: {{^}}test_umulhi24_i33:
; GCN: s_load_dword s
; GCN: s_load_dword s
; GCN-NOT: and
; GCN-NOT: lshr
; GCN: v_mul_hi_u32_u24_e32 v[[MUL_HI:[0-9]+]],
; GCN-NEXT: v_and_b32_e32 v[[HI:[0-9]+]], 1, v[[MUL_HI]]
; GCN-NEXT: buffer_store_dword v[[HI]]
define amdgpu_kernel void @test_umulhi24_i33(i32 addrspace(1)* %out, i33 %a, i33 %b) {
entry:
  %tmp0 = shl i33 %a, 9
  %a_24 = lshr i33 %tmp0, 9
  %tmp1 = shl i33 %b, 9
  %b_24 = lshr i33 %tmp1, 9
  %tmp2 = mul i33 %a_24, %b_24
  %hi = lshr i33 %tmp2, 32
  %trunc = trunc i33 %hi to i32
  store i32 %trunc, i32 addrspace(1)* %out
  ret void
}


; Make sure the created any_extend is ignored to use the real bits
; being multiplied.

; GCN-LABEL: {{^}}test_umul24_anyextend_i24_src0_src1:
; GCN-DAG: v_mul_u32_u24_e32 v0, 0xea, v0
; GCN-DAG: v_mul_u32_u24_e32 v1, 0x39b, v1
; GCN: v_mul_u32_u24_e32 v0, v0, v1
; GCN: v_and_b32_e32 v0, 0x1fffe, v0
; GCN: v_mul_u32_u24_e32 v0, 0x63, v0
; GCN: s_setpc_b64
define i17 @test_umul24_anyextend_i24_src0_src1(i24 %a, i24 %b) {
entry:
  %aa = mul i24 %a, 234
  %bb = mul i24 %b, 923
  %a_32 = zext i24 %aa to i32
  %b_32 = zext i24 %bb to i32
  %mul = mul i32 %a_32, %b_32
  %trunc = trunc i32 %mul to i17
  %arst = mul i17 %trunc, 99
  ret i17 %arst
}

; GCN-LABEL: {{^}}test_umul24_anyextend_i23_src0_src1:
; GCN: s_mov_b32 [[U23_MASK:s[0-9]+]], 0x7fffff
; GCN-DAG: v_and_b32_e32 v0, [[U23_MASK]], v0
; GCN-DAG: v_and_b32_e32 v1, [[U23_MASK]], v1
; GCN-DAG: v_mul_u32_u24_e32 v0, 0xea, v0
; GCN-DAG: v_mul_u32_u24_e32 v1, 0x39b, v1
; GCN: v_and_b32_e32 v1, s6, v1
; GCN: v_and_b32_e32 v0, 0x7ffffe, v0
; GCN: v_mul_u32_u24_e32 v0, v0, v1
; GCN: v_and_b32_e32 v0, 0x1fffe, v0
; GCN: v_mul_u32_u24_e32 v0, 0x63, v0
; GCN: s_setpc_b64
define i17 @test_umul24_anyextend_i23_src0_src1(i23 %a, i23 %b) {
entry:
  %aa = mul i23 %a, 234
  %bb = mul i23 %b, 923
  %a_32 = zext i23 %aa to i32
  %b_32 = zext i23 %bb to i32
  %mul = mul i32 %a_32, %b_32
  %trunc = trunc i32 %mul to i17
  %arst = mul i17 %trunc, 99
  ret i17 %arst
}