llvm.trunc.f16.ll
2.26 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
; RUN: llc -amdgpu-scalarize-global-loads=false -march=amdgcn -mcpu=tahiti -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=SI %s
; RUN: llc -amdgpu-scalarize-global-loads=false -march=amdgcn -mcpu=fiji -mattr=-flat-for-global -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=VI %s
declare half @llvm.trunc.f16(half %a)
declare <2 x half> @llvm.trunc.v2f16(<2 x half> %a)
; GCN-LABEL: {{^}}trunc_f16
; GCN: buffer_load_ushort v[[A_F16:[0-9]+]]
; SI: v_cvt_f32_f16_e32 v[[A_F32:[0-9]+]], v[[A_F16]]
; SI: v_trunc_f32_e32 v[[R_F32:[0-9]+]], v[[A_F32]]
; SI: v_cvt_f16_f32_e32 v[[R_F16:[0-9]+]], v[[R_F32]]
; VI: v_trunc_f16_e32 v[[R_F16:[0-9]+]], v[[A_F16]]
; GCN: buffer_store_short v[[R_F16]]
; GCN: s_endpgm
define amdgpu_kernel void @trunc_f16(
half addrspace(1)* %r,
half addrspace(1)* %a) {
entry:
%a.val = load half, half addrspace(1)* %a
%r.val = call half @llvm.trunc.f16(half %a.val)
store half %r.val, half addrspace(1)* %r
ret void
}
; GCN-LABEL: {{^}}trunc_v2f16
; GCN: buffer_load_dword v[[A_V2_F16:[0-9]+]]
; SI-DAG: v_cvt_f32_f16_e32 v[[A_F32_0:[0-9]+]], v[[A_V2_F16]]
; SI-DAG: v_lshrrev_b32_e32 v[[A_F16_1:[0-9]+]], 16, v[[A_V2_F16]]
; SI-DAG: v_cvt_f32_f16_e32 v[[A_F32_1:[0-9]+]], v[[A_F16_1]]
; SI-DAG: v_trunc_f32_e32 v[[R_F32_0:[0-9]+]], v[[A_F32_0]]
; SI-DAG: v_cvt_f16_f32_e32 v[[R_F16_0:[0-9]+]], v[[R_F32_0]]
; SI-DAG: v_trunc_f32_e32 v[[R_F32_1:[0-9]+]], v[[A_F32_1]]
; SI-DAG: v_cvt_f16_f32_e32 v[[R_F16_1:[0-9]+]], v[[R_F32_1]]
; SI-DAG: v_lshlrev_b32_e32 v[[R_F16_HI:[0-9]+]], 16, v[[R_F16_1]]
; SI-NOT: v_and_b32
; SI: v_or_b32_e32 v[[R_V2_F16:[0-9]+]], v[[R_F16_0]], v[[R_F16_HI]]
; VI-DAG: v_trunc_f16_e32 v[[R_F16_0:[0-9]+]], v[[A_V2_F16]]
; VI-DAG: v_trunc_f16_sdwa v[[R_F16_1:[0-9]+]], v[[A_V2_F16]] dst_sel:WORD_1 dst_unused:UNUSED_PAD src0_sel:WORD_1
; VI-NOT: v_and_b32
; VI: v_or_b32_e32 v[[R_V2_F16:[0-9]+]], v[[R_F16_0]], v[[R_F16_1]]
; GCN: buffer_store_dword v[[R_V2_F16]]
; GCN: s_endpgm
define amdgpu_kernel void @trunc_v2f16(
<2 x half> addrspace(1)* %r,
<2 x half> addrspace(1)* %a) {
entry:
%a.val = load <2 x half>, <2 x half> addrspace(1)* %a
%r.val = call <2 x half> @llvm.trunc.v2f16(<2 x half> %a.val)
store <2 x half> %r.val, <2 x half> addrspace(1)* %r
ret void
}