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[AMDGPU] add test for usubsat; NFC

This commit is contained in:
Sanjay Patel 2021-10-19 12:13:49 -04:00
parent 081bad1d4d
commit c1ca9e3077
1 changed files with 40 additions and 0 deletions
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40
llvm/test/CodeGen/AMDGPU/usubsat.ll
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@ -73,6 +73,46 @@ define i16 @v_usubsat_i16(i16 %lhs, i16 %rhs) {
ret i16 %result
}
define i16 @usubsat_as_bithack_i16(i16 %x) {
; GFX6-LABEL: usubsat_as_bithack_i16:
; GFX6: ; %bb.0:
; GFX6-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GFX6-NEXT: v_bfe_i32 v1, v0, 0, 16
; GFX6-NEXT: v_ashrrev_i32_e32 v1, 15, v1
; GFX6-NEXT: v_xor_b32_e32 v0, 0xffff8000, v0
; GFX6-NEXT: v_and_b32_e32 v0, v1, v0
; GFX6-NEXT: s_setpc_b64 s[30:31]
;
; GFX8-LABEL: usubsat_as_bithack_i16:
; GFX8: ; %bb.0:
; GFX8-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GFX8-NEXT: v_ashrrev_i16_e32 v1, 15, v0
; GFX8-NEXT: v_xor_b32_e32 v0, 0xffff8000, v0
; GFX8-NEXT: v_and_b32_e32 v0, v1, v0
; GFX8-NEXT: s_setpc_b64 s[30:31]
;
; GFX9-LABEL: usubsat_as_bithack_i16:
; GFX9: ; %bb.0:
; GFX9-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GFX9-NEXT: v_ashrrev_i16_e32 v1, 15, v0
; GFX9-NEXT: v_xor_b32_e32 v0, 0xffff8000, v0
; GFX9-NEXT: v_and_b32_e32 v0, v1, v0
; GFX9-NEXT: s_setpc_b64 s[30:31]
;
; GFX10-LABEL: usubsat_as_bithack_i16:
; GFX10: ; %bb.0:
; GFX10-NEXT: s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
; GFX10-NEXT: s_waitcnt_vscnt null, 0x0
; GFX10-NEXT: v_ashrrev_i16 v1, 15, v0
; GFX10-NEXT: v_xor_b32_e32 v0, 0xffff8000, v0
; GFX10-NEXT: v_and_b32_e32 v0, v1, v0
; GFX10-NEXT: s_setpc_b64 s[30:31]
%signsplat = ashr i16 %x, 15
%flipsign = xor i16 %x, 32768
%result = and i16 %signsplat, %flipsign
ret i16 %result
}
define i32 @v_usubsat_i32(i32 %lhs, i32 %rhs) {
; GFX6-LABEL: v_usubsat_i32:
; GFX6: ; %bb.0: