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[NVPTX] Add folding for cvt.rn.bf16x2.f32 #116109

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Nov 14, 2024
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[NVPTX] Add folding for cvt.rn.bf16x2.f32 #116109

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45db970
[NVPTX] Add folding for cvt.rn.bf16x2.f32
AlexMaclean Nov 11, 2024
3f8f50d
address comments
AlexMaclean Nov 13, 2024
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14 changes: 14 additions & 0 deletions llvm/lib/Target/NVPTX/NVPTXInstrInfo.td
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Original file line number Diff line number Diff line change
Expand Up @@ -739,6 +739,20 @@ let hasSideEffects = false in {
def CVT_f16x2_e5m2x2 : CVT_f16x2_fp8<"e5m2">;
}

def fpround_oneuse : PatFrag<(ops node:$a), (fpround node:$a), [{
return N->hasOneUse();
}]>;

def : Pat<(v2bf16 (build_vector (bf16 (fpround_oneuse Float32Regs:$a)),
(bf16 (fpround_oneuse Float32Regs:$b)))),
(CVT_bf16x2_f32 Float32Regs:$a, Float32Regs:$b, CvtRN)>,
Requires<[hasPTX<70>, hasSM<80>, hasBF16Math]>;

def : Pat<(v2f16 (build_vector (f16 (fpround_oneuse Float32Regs:$a)),
(f16 (fpround_oneuse Float32Regs:$b)))),
(CVT_f16x2_f32 Float32Regs:$a, Float32Regs:$b, CvtRN)>,
Requires<[hasPTX<70>, hasSM<80>, useFP16Math]>;

//-----------------------------------
// Selection instructions (selp)
//-----------------------------------
Expand Down
54 changes: 18 additions & 36 deletions llvm/test/CodeGen/NVPTX/bf16-instructions.ll
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Original file line number Diff line number Diff line change
Expand Up @@ -204,7 +204,7 @@ define <2 x bfloat> @test_faddx2(<2 x bfloat> %a, <2 x bfloat> %b) #0 {
;
; SM80-LABEL: test_faddx2(
; SM80: {
; SM80-NEXT: .reg .b16 %rs<7>;
; SM80-NEXT: .reg .b16 %rs<5>;
; SM80-NEXT: .reg .b32 %r<4>;
; SM80-NEXT: .reg .f32 %f<7>;
; SM80-EMPTY:
Expand All @@ -216,18 +216,16 @@ define <2 x bfloat> @test_faddx2(<2 x bfloat> %a, <2 x bfloat> %b) #0 {
; SM80-NEXT: mov.b32 {%rs3, %rs4}, %r1;
; SM80-NEXT: cvt.f32.bf16 %f2, %rs4;
; SM80-NEXT: add.rn.f32 %f3, %f2, %f1;
; SM80-NEXT: cvt.rn.bf16.f32 %rs5, %f3;
; SM80-NEXT: cvt.f32.bf16 %f4, %rs1;
; SM80-NEXT: cvt.f32.bf16 %f5, %rs3;
; SM80-NEXT: add.rn.f32 %f6, %f5, %f4;
; SM80-NEXT: cvt.rn.bf16.f32 %rs6, %f6;
; SM80-NEXT: mov.b32 %r3, {%rs6, %rs5};
; SM80-NEXT: cvt.rn.bf16x2.f32 %r3, %f6, %f3;
; SM80-NEXT: st.param.b32 [func_retval0], %r3;
; SM80-NEXT: ret;
;
; SM80-FTZ-LABEL: test_faddx2(
; SM80-FTZ: {
; SM80-FTZ-NEXT: .reg .b16 %rs<7>;
; SM80-FTZ-NEXT: .reg .b16 %rs<5>;
; SM80-FTZ-NEXT: .reg .b32 %r<4>;
; SM80-FTZ-NEXT: .reg .f32 %f<7>;
; SM80-FTZ-EMPTY:
Expand All @@ -239,12 +237,10 @@ define <2 x bfloat> @test_faddx2(<2 x bfloat> %a, <2 x bfloat> %b) #0 {
; SM80-FTZ-NEXT: mov.b32 {%rs3, %rs4}, %r1;
; SM80-FTZ-NEXT: cvt.ftz.f32.bf16 %f2, %rs4;
; SM80-FTZ-NEXT: add.rn.ftz.f32 %f3, %f2, %f1;
; SM80-FTZ-NEXT: cvt.rn.bf16.f32 %rs5, %f3;
; SM80-FTZ-NEXT: cvt.ftz.f32.bf16 %f4, %rs1;
; SM80-FTZ-NEXT: cvt.ftz.f32.bf16 %f5, %rs3;
; SM80-FTZ-NEXT: add.rn.ftz.f32 %f6, %f5, %f4;
; SM80-FTZ-NEXT: cvt.rn.bf16.f32 %rs6, %f6;
; SM80-FTZ-NEXT: mov.b32 %r3, {%rs6, %rs5};
; SM80-FTZ-NEXT: cvt.rn.bf16x2.f32 %r3, %f6, %f3;
; SM80-FTZ-NEXT: st.param.b32 [func_retval0], %r3;
; SM80-FTZ-NEXT: ret;
;
Expand Down Expand Up @@ -311,7 +307,7 @@ define <2 x bfloat> @test_fsubx2(<2 x bfloat> %a, <2 x bfloat> %b) #0 {
;
; SM80-LABEL: test_fsubx2(
; SM80: {
; SM80-NEXT: .reg .b16 %rs<7>;
; SM80-NEXT: .reg .b16 %rs<5>;
; SM80-NEXT: .reg .b32 %r<4>;
; SM80-NEXT: .reg .f32 %f<7>;
; SM80-EMPTY:
Expand All @@ -323,18 +319,16 @@ define <2 x bfloat> @test_fsubx2(<2 x bfloat> %a, <2 x bfloat> %b) #0 {
; SM80-NEXT: mov.b32 {%rs3, %rs4}, %r1;
; SM80-NEXT: cvt.f32.bf16 %f2, %rs4;
; SM80-NEXT: sub.rn.f32 %f3, %f2, %f1;
; SM80-NEXT: cvt.rn.bf16.f32 %rs5, %f3;
; SM80-NEXT: cvt.f32.bf16 %f4, %rs1;
; SM80-NEXT: cvt.f32.bf16 %f5, %rs3;
; SM80-NEXT: sub.rn.f32 %f6, %f5, %f4;
; SM80-NEXT: cvt.rn.bf16.f32 %rs6, %f6;
; SM80-NEXT: mov.b32 %r3, {%rs6, %rs5};
; SM80-NEXT: cvt.rn.bf16x2.f32 %r3, %f6, %f3;
; SM80-NEXT: st.param.b32 [func_retval0], %r3;
; SM80-NEXT: ret;
;
; SM80-FTZ-LABEL: test_fsubx2(
; SM80-FTZ: {
; SM80-FTZ-NEXT: .reg .b16 %rs<7>;
; SM80-FTZ-NEXT: .reg .b16 %rs<5>;
; SM80-FTZ-NEXT: .reg .b32 %r<4>;
; SM80-FTZ-NEXT: .reg .f32 %f<7>;
; SM80-FTZ-EMPTY:
Expand All @@ -346,12 +340,10 @@ define <2 x bfloat> @test_fsubx2(<2 x bfloat> %a, <2 x bfloat> %b) #0 {
; SM80-FTZ-NEXT: mov.b32 {%rs3, %rs4}, %r1;
; SM80-FTZ-NEXT: cvt.ftz.f32.bf16 %f2, %rs4;
; SM80-FTZ-NEXT: sub.rn.ftz.f32 %f3, %f2, %f1;
; SM80-FTZ-NEXT: cvt.rn.bf16.f32 %rs5, %f3;
; SM80-FTZ-NEXT: cvt.ftz.f32.bf16 %f4, %rs1;
; SM80-FTZ-NEXT: cvt.ftz.f32.bf16 %f5, %rs3;
; SM80-FTZ-NEXT: sub.rn.ftz.f32 %f6, %f5, %f4;
; SM80-FTZ-NEXT: cvt.rn.bf16.f32 %rs6, %f6;
; SM80-FTZ-NEXT: mov.b32 %r3, {%rs6, %rs5};
; SM80-FTZ-NEXT: cvt.rn.bf16x2.f32 %r3, %f6, %f3;
; SM80-FTZ-NEXT: st.param.b32 [func_retval0], %r3;
; SM80-FTZ-NEXT: ret;
;
Expand Down Expand Up @@ -418,7 +410,7 @@ define <2 x bfloat> @test_fmulx2(<2 x bfloat> %a, <2 x bfloat> %b) #0 {
;
; SM80-LABEL: test_fmulx2(
; SM80: {
; SM80-NEXT: .reg .b16 %rs<7>;
; SM80-NEXT: .reg .b16 %rs<5>;
; SM80-NEXT: .reg .b32 %r<4>;
; SM80-NEXT: .reg .f32 %f<7>;
; SM80-EMPTY:
Expand All @@ -430,18 +422,16 @@ define <2 x bfloat> @test_fmulx2(<2 x bfloat> %a, <2 x bfloat> %b) #0 {
; SM80-NEXT: mov.b32 {%rs3, %rs4}, %r1;
; SM80-NEXT: cvt.f32.bf16 %f2, %rs4;
; SM80-NEXT: mul.rn.f32 %f3, %f2, %f1;
; SM80-NEXT: cvt.rn.bf16.f32 %rs5, %f3;
; SM80-NEXT: cvt.f32.bf16 %f4, %rs1;
; SM80-NEXT: cvt.f32.bf16 %f5, %rs3;
; SM80-NEXT: mul.rn.f32 %f6, %f5, %f4;
; SM80-NEXT: cvt.rn.bf16.f32 %rs6, %f6;
; SM80-NEXT: mov.b32 %r3, {%rs6, %rs5};
; SM80-NEXT: cvt.rn.bf16x2.f32 %r3, %f6, %f3;
; SM80-NEXT: st.param.b32 [func_retval0], %r3;
; SM80-NEXT: ret;
;
; SM80-FTZ-LABEL: test_fmulx2(
; SM80-FTZ: {
; SM80-FTZ-NEXT: .reg .b16 %rs<7>;
; SM80-FTZ-NEXT: .reg .b16 %rs<5>;
; SM80-FTZ-NEXT: .reg .b32 %r<4>;
; SM80-FTZ-NEXT: .reg .f32 %f<7>;
; SM80-FTZ-EMPTY:
Expand All @@ -453,12 +443,10 @@ define <2 x bfloat> @test_fmulx2(<2 x bfloat> %a, <2 x bfloat> %b) #0 {
; SM80-FTZ-NEXT: mov.b32 {%rs3, %rs4}, %r1;
; SM80-FTZ-NEXT: cvt.ftz.f32.bf16 %f2, %rs4;
; SM80-FTZ-NEXT: mul.rn.ftz.f32 %f3, %f2, %f1;
; SM80-FTZ-NEXT: cvt.rn.bf16.f32 %rs5, %f3;
; SM80-FTZ-NEXT: cvt.ftz.f32.bf16 %f4, %rs1;
; SM80-FTZ-NEXT: cvt.ftz.f32.bf16 %f5, %rs3;
; SM80-FTZ-NEXT: mul.rn.ftz.f32 %f6, %f5, %f4;
; SM80-FTZ-NEXT: cvt.rn.bf16.f32 %rs6, %f6;
; SM80-FTZ-NEXT: mov.b32 %r3, {%rs6, %rs5};
; SM80-FTZ-NEXT: cvt.rn.bf16x2.f32 %r3, %f6, %f3;
; SM80-FTZ-NEXT: st.param.b32 [func_retval0], %r3;
; SM80-FTZ-NEXT: ret;
;
Expand Down Expand Up @@ -525,7 +513,7 @@ define <2 x bfloat> @test_fdiv(<2 x bfloat> %a, <2 x bfloat> %b) #0 {
;
; SM80-LABEL: test_fdiv(
; SM80: {
; SM80-NEXT: .reg .b16 %rs<7>;
; SM80-NEXT: .reg .b16 %rs<5>;
; SM80-NEXT: .reg .b32 %r<4>;
; SM80-NEXT: .reg .f32 %f<7>;
; SM80-EMPTY:
Expand All @@ -537,18 +525,16 @@ define <2 x bfloat> @test_fdiv(<2 x bfloat> %a, <2 x bfloat> %b) #0 {
; SM80-NEXT: mov.b32 {%rs3, %rs4}, %r1;
; SM80-NEXT: cvt.f32.bf16 %f2, %rs4;
; SM80-NEXT: div.rn.f32 %f3, %f2, %f1;
; SM80-NEXT: cvt.rn.bf16.f32 %rs5, %f3;
; SM80-NEXT: cvt.f32.bf16 %f4, %rs1;
; SM80-NEXT: cvt.f32.bf16 %f5, %rs3;
; SM80-NEXT: div.rn.f32 %f6, %f5, %f4;
; SM80-NEXT: cvt.rn.bf16.f32 %rs6, %f6;
; SM80-NEXT: mov.b32 %r3, {%rs6, %rs5};
; SM80-NEXT: cvt.rn.bf16x2.f32 %r3, %f6, %f3;
; SM80-NEXT: st.param.b32 [func_retval0], %r3;
; SM80-NEXT: ret;
;
; SM80-FTZ-LABEL: test_fdiv(
; SM80-FTZ: {
; SM80-FTZ-NEXT: .reg .b16 %rs<7>;
; SM80-FTZ-NEXT: .reg .b16 %rs<5>;
; SM80-FTZ-NEXT: .reg .b32 %r<4>;
; SM80-FTZ-NEXT: .reg .f32 %f<7>;
; SM80-FTZ-EMPTY:
Expand All @@ -560,18 +546,16 @@ define <2 x bfloat> @test_fdiv(<2 x bfloat> %a, <2 x bfloat> %b) #0 {
; SM80-FTZ-NEXT: mov.b32 {%rs3, %rs4}, %r1;
; SM80-FTZ-NEXT: cvt.ftz.f32.bf16 %f2, %rs4;
; SM80-FTZ-NEXT: div.rn.ftz.f32 %f3, %f2, %f1;
; SM80-FTZ-NEXT: cvt.rn.bf16.f32 %rs5, %f3;
; SM80-FTZ-NEXT: cvt.ftz.f32.bf16 %f4, %rs1;
; SM80-FTZ-NEXT: cvt.ftz.f32.bf16 %f5, %rs3;
; SM80-FTZ-NEXT: div.rn.ftz.f32 %f6, %f5, %f4;
; SM80-FTZ-NEXT: cvt.rn.bf16.f32 %rs6, %f6;
; SM80-FTZ-NEXT: mov.b32 %r3, {%rs6, %rs5};
; SM80-FTZ-NEXT: cvt.rn.bf16x2.f32 %r3, %f6, %f3;
; SM80-FTZ-NEXT: st.param.b32 [func_retval0], %r3;
; SM80-FTZ-NEXT: ret;
;
; SM90-LABEL: test_fdiv(
; SM90: {
; SM90-NEXT: .reg .b16 %rs<7>;
; SM90-NEXT: .reg .b16 %rs<5>;
; SM90-NEXT: .reg .b32 %r<4>;
; SM90-NEXT: .reg .f32 %f<7>;
; SM90-EMPTY:
Expand All @@ -583,12 +567,10 @@ define <2 x bfloat> @test_fdiv(<2 x bfloat> %a, <2 x bfloat> %b) #0 {
; SM90-NEXT: mov.b32 {%rs3, %rs4}, %r1;
; SM90-NEXT: cvt.f32.bf16 %f2, %rs4;
; SM90-NEXT: div.rn.f32 %f3, %f2, %f1;
; SM90-NEXT: cvt.rn.bf16.f32 %rs5, %f3;
; SM90-NEXT: cvt.f32.bf16 %f4, %rs1;
; SM90-NEXT: cvt.f32.bf16 %f5, %rs3;
; SM90-NEXT: div.rn.f32 %f6, %f5, %f4;
; SM90-NEXT: cvt.rn.bf16.f32 %rs6, %f6;
; SM90-NEXT: mov.b32 %r3, {%rs6, %rs5};
; SM90-NEXT: cvt.rn.bf16x2.f32 %r3, %f6, %f3;
; SM90-NEXT: st.param.b32 [func_retval0], %r3;
; SM90-NEXT: ret;
%r = fdiv <2 x bfloat> %a, %b
Expand Down
8 changes: 2 additions & 6 deletions llvm/test/CodeGen/NVPTX/bf16x2-instructions-approx.ll
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Expand Up @@ -13,9 +13,7 @@ declare <2 x bfloat> @llvm.cos.f16(<2 x bfloat> %a) #0
; CHECK-DAG: cvt.f32.bf16 [[AF1:%f[0-9]+]], [[A1]];
; CHECK-DAG: sin.approx.f32 [[RF0:%f[0-9]+]], [[AF0]];
; CHECK-DAG: sin.approx.f32 [[RF1:%f[0-9]+]], [[AF1]];
; CHECK-DAG: cvt.rn.bf16.f32 [[R0:%rs[0-9]+]], [[RF0]];
; CHECK-DAG: cvt.rn.bf16.f32 [[R1:%rs[0-9]+]], [[RF1]];
; CHECK: mov.b32 [[R:%r[0-9]+]], {[[R0]], [[R1]]}
; CHECK: cvt.rn.bf16x2.f32 [[R:%r[0-9]+]], [[RF0]], [[RF1]]
; CHECK: st.param.b32 [func_retval0], [[R]];
; CHECK: ret;
define <2 x bfloat> @test_sin(<2 x bfloat> %a) #0 #1 {
Expand All @@ -30,9 +28,7 @@ define <2 x bfloat> @test_sin(<2 x bfloat> %a) #0 #1 {
; CHECK-DAG: cvt.f32.bf16 [[AF1:%f[0-9]+]], [[A1]];
; CHECK-DAG: cos.approx.f32 [[RF0:%f[0-9]+]], [[AF0]];
; CHECK-DAG: cos.approx.f32 [[RF1:%f[0-9]+]], [[AF1]];
; CHECK-DAG: cvt.rn.bf16.f32 [[R0:%rs[0-9]+]], [[RF0]];
; CHECK-DAG: cvt.rn.bf16.f32 [[R1:%rs[0-9]+]], [[RF1]];
; CHECK: mov.b32 [[R:%r[0-9]+]], {[[R0]], [[R1]]}
; CHECK: cvt.rn.bf16x2.f32 [[R:%r[0-9]+]], [[RF0]], [[RF1]]
; CHECK: st.param.b32 [func_retval0], [[R]];
; CHECK: ret;
define <2 x bfloat> @test_cos(<2 x bfloat> %a) #0 #1 {
Expand Down
36 changes: 10 additions & 26 deletions llvm/test/CodeGen/NVPTX/bf16x2-instructions.ll
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Original file line number Diff line number Diff line change
Expand Up @@ -26,9 +26,7 @@ define <2 x bfloat> @test_ret_const() #0 {
; SM80-DAG: cvt.f32.bf16 [[FA1:%f[0-9]+]], [[A1]]
; SM80-DAG: add.rn.f32 [[FR0:%f[0-9]+]], [[FA0]], 0f3F800000;
; SM80-DAG: add.rn.f32 [[FR1:%f[0-9]+]], [[FA1]], 0f40000000;
; SM80-DAG: cvt.rn.bf16.f32 [[R0:%rs[0-9]+]], [[FR0]]
; SM80-DAG: cvt.rn.bf16.f32 [[R1:%rs[0-9]+]], [[FR1]]
; SM80-DAG: mov.b32 [[R:%r[0-9]+]], {[[R0]], [[R1]]}
; SM80-DAG: cvt.rn.bf16x2.f32 [[R:%r[0-9]+]], [[FR0]], [[FR1]];
;
; CHECK-NEXT: st.param.b32 [func_retval0], [[R]];
; CHECK-NEXT: ret;
Expand Down Expand Up @@ -68,9 +66,7 @@ define bfloat @test_fadd_imm_1(bfloat %a) #0 {
; SM80-DAG: cvt.f32.bf16 [[FB1:%f[0-9]+]], [[B1]];
; SM80-DAG: sub.rn.f32 [[FR0:%f[0-9]+]], [[FA0]], [[FB0]];
; SM80-DAG: sub.rn.f32 [[FR1:%f[0-9]+]], [[FA1]], [[FB1]];
; SM80-DAG: cvt.rn.bf16.f32 [[R0:%rs[0-9]+]], [[FR0]];
; SM80-DAG: cvt.rn.bf16.f32 [[R1:%rs[0-9]+]], [[FR1]];
; SM80: mov.b32 [[R:%r[0-9]+]], {[[R0]], [[R1]]};
; SM80-DAG: cvt.rn.bf16x2.f32 [[R:%r[0-9]+]], [[FR0]], [[FR1]];

; CHECK: st.param.b32 [func_retval0], [[R]];
; CHECK: ret;
Expand All @@ -93,9 +89,7 @@ define <2 x bfloat> @test_fsubx2(<2 x bfloat> %a, <2 x bfloat> %b) #0 {
; SM80-DAG: cvt.f32.bf16 [[FB1:%f[0-9]+]], [[B1]];
; SM80-DAG: mul.rn.f32 [[FR0:%f[0-9]+]], [[FA0]], [[FB0]];
; SM80-DAG: mul.rn.f32 [[FR1:%f[0-9]+]], [[FA1]], [[FB1]];
; SM80-DAG: cvt.rn.bf16.f32 [[R0:%rs[0-9]+]], [[FR0]];
; SM80-DAG: cvt.rn.bf16.f32 [[R1:%rs[0-9]+]], [[FR1]];
; SM80: mov.b32 [[R:%r[0-9]+]], {[[R0]], [[R1]]};
; SM80-DAG: cvt.rn.bf16x2.f32 [[R:%r[0-9]+]], [[FR0]], [[FR1]];

; CHECK: st.param.b32 [func_retval0], [[R]];
; CHECK: ret;
Expand All @@ -116,9 +110,7 @@ define <2 x bfloat> @test_fmulx2(<2 x bfloat> %a, <2 x bfloat> %b) #0 {
; CHECK-DAG: cvt.f32.bf16 [[FB1:%f[0-9]+]], [[B1]];
; CHECK-DAG: div.rn.f32 [[FR0:%f[0-9]+]], [[FA0]], [[FB0]];
; CHECK-DAG: div.rn.f32 [[FR1:%f[0-9]+]], [[FA1]], [[FB1]];
; CHECK-DAG: cvt.rn.bf16.f32 [[R0:%rs[0-9]+]], [[FR0]];
; CHECK-DAG: cvt.rn.bf16.f32 [[R1:%rs[0-9]+]], [[FR1]];
; CHECK-NEXT: mov.b32 [[R:%r[0-9]+]], {[[R0]], [[R1]]}
; CHECK: cvt.rn.bf16x2.f32 [[R:%r[0-9]+]], [[FR0]], [[FR1]];
; CHECK-NEXT: st.param.b32 [func_retval0], [[R]];
; CHECK-NEXT: ret;

Expand Down Expand Up @@ -287,9 +279,7 @@ define <2 x bfloat> @test_select_cc_bf16_f32(<2 x bfloat> %a, <2 x bfloat> %b,

; CHECK-LABEL: test_fptrunc_2xfloat(
; CHECK: ld.param.v2.f32 {[[A0:%f[0-9]+]], [[A1:%f[0-9]+]]}, [test_fptrunc_2xfloat_param_0];
; CHECK-DAG: cvt.rn.bf16.f32 [[R0:%rs[0-9]+]], [[A0]];
; CHECK-DAG: cvt.rn.bf16.f32 [[R1:%rs[0-9]+]], [[A1]];
; CHECK: mov.b32 [[R:%r[0-9]+]], {[[R0]], [[R1]]}
; CHECK: cvt.rn.bf16x2.f32 [[R:%r[0-9]+]], [[A0]], [[A1]];
; CHECK: st.param.b32 [func_retval0], [[R]];
; CHECK: ret;
define <2 x bfloat> @test_fptrunc_2xfloat(<2 x float> %a) #0 {
Expand Down Expand Up @@ -359,9 +349,7 @@ declare <2 x bfloat> @llvm.fmuladd.f16(<2 x bfloat> %a, <2 x bfloat> %b, <2 x bf
; CHECK-DAG: cvt.f32.bf16 [[AF1:%f[0-9]+]], [[A1]];
; CHECK-DAG: sqrt.rn.f32 [[RF0:%f[0-9]+]], [[AF0]];
; CHECK-DAG: sqrt.rn.f32 [[RF1:%f[0-9]+]], [[AF1]];
; CHECK-DAG: cvt.rn.bf16.f32 [[R0:%rs[0-9]+]], [[RF0]];
; CHECK-DAG: cvt.rn.bf16.f32 [[R1:%rs[0-9]+]], [[RF1]];
; CHECK: mov.b32 [[R:%r[0-9]+]], {[[R0]], [[R1]]}
; CHECK-DAG: cvt.rn.bf16x2.f32 [[R:%r[0-9]+]], [[RF0]], [[RF1]];
; CHECK: st.param.b32 [func_retval0], [[R]];
; CHECK: ret;
define <2 x bfloat> @test_sqrt(<2 x bfloat> %a) #0 {
Expand Down Expand Up @@ -436,9 +424,7 @@ define <2 x bfloat> @test_maxnum(<2 x bfloat> %a, <2 x bfloat> %b) #0 {
; SM80-DAG: cvt.f32.bf16 [[FA1:%f[0-9]+]], [[A1]];
; SM80-DAG: cvt.rmi.f32.f32 [[RF0:%f[0-9]+]], [[FA0]];
; SM80-DAG: cvt.rmi.f32.f32 [[RF1:%f[0-9]+]], [[FA1]];
; SM80-DAG: cvt.rn.bf16.f32 [[R0:%rs[0-9]+]], [[RF0]];
; SM80-DAG: cvt.rn.bf16.f32 [[R1:%rs[0-9]+]], [[RF1]];
; CHECK: mov.b32 [[R:%r[0-9]+]], {[[R0]], [[R1]]}
; SM80: cvt.rn.bf16x2.f32 [[R:%r[0-9]+]], [[RF0]], [[RF1]];
; CHECK: st.param.b32 [func_retval0], [[R]];
; CHECK: ret;
define <2 x bfloat> @test_floor(<2 x bfloat> %a) #0 {
Expand All @@ -455,9 +441,7 @@ define <2 x bfloat> @test_floor(<2 x bfloat> %a) #0 {
; SM80-DAG: cvt.f32.bf16 [[FA1:%f[0-9]+]], [[A1]];
; SM80-DAG: cvt.rpi.f32.f32 [[RF0:%f[0-9]+]], [[FA0]];
; SM80-DAG: cvt.rpi.f32.f32 [[RF1:%f[0-9]+]], [[FA1]];
; SM80-DAG: cvt.rn.bf16.f32 [[R0:%rs[0-9]+]], [[RF0]];
; SM80-DAG: cvt.rn.bf16.f32 [[R1:%rs[0-9]+]], [[RF1]];
; CHECK: mov.b32 [[R:%r[0-9]+]], {[[R0]], [[R1]]}
; SM80: cvt.rn.bf16x2.f32 [[R:%r[0-9]+]], [[RF0]], [[RF1]];
; CHECK: st.param.b32 [func_retval0], [[R]];
; CHECK: ret;
define <2 x bfloat> @test_ceil(<2 x bfloat> %a) #0 {
Expand All @@ -470,7 +454,7 @@ define <2 x bfloat> @test_ceil(<2 x bfloat> %a) #0 {
; CHECK-DAG: mov.b32 {[[A0:%rs[0-9]+]], [[A1:%rs[0-9]+]]}, [[A]];
; SM90: cvt.rzi.bf16.bf16 [[R1:%rs[0-9]+]], [[A1]];
; SM90: cvt.rzi.bf16.bf16 [[R0:%rs[0-9]+]], [[A0]];
; CHECK: mov.b32 [[R:%r[0-9]+]], {[[R0]], [[R1]]}
; SM90: mov.b32 [[R:%r[0-9]+]], {[[R0]], [[R1]]}
; CHECK: st.param.b32 [func_retval0], [[R]];
; CHECK: ret;
define <2 x bfloat> @test_trunc(<2 x bfloat> %a) #0 {
Expand All @@ -483,7 +467,7 @@ define <2 x bfloat> @test_trunc(<2 x bfloat> %a) #0 {
; CHECK-DAG: mov.b32 {[[A0:%rs[0-9]+]], [[A1:%rs[0-9]+]]}, [[A]];
; SM90: cvt.rni.bf16.bf16 [[R1:%rs[0-9]+]], [[A1]];
; SM90: cvt.rni.bf16.bf16 [[R0:%rs[0-9]+]], [[A0]];
; CHECK: mov.b32 [[R:%r[0-9]+]], {[[R0]], [[R1]]}
; SM90: mov.b32 [[R:%r[0-9]+]], {[[R0]], [[R1]]}
; CHECK: st.param.b32 [func_retval0], [[R]];
; CHECK: ret;
define <2 x bfloat> @test_rint(<2 x bfloat> %a) #0 {
Expand Down
21 changes: 21 additions & 0 deletions llvm/test/CodeGen/NVPTX/convert-sm80.ll
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Original file line number Diff line number Diff line change
Expand Up @@ -135,3 +135,24 @@ ret i32 %val
}

declare i32 @llvm.nvvm.f2tf32.rna(float)


define <2 x bfloat> @fold_ff2bf16x2(float %a, float %b) {
; CHECK-LABEL: fold_ff2bf16x2
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@Artem-B Artem-B Nov 13, 2024

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We may as well automate check generation in this test file, too. For vector construction, theorder of inputs is important and we're not capturing it in this file right now.

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@AlexMaclean AlexMaclean Nov 13, 2024

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Sounds good, I've updated the test file.

; CHECK: cvt.rn.bf16x2.f32
%ah = fptrunc float %a to bfloat
%bh = fptrunc float %b to bfloat
%v0 = insertelement <2 x bfloat> poison, bfloat %ah, i64 0
%v1 = insertelement <2 x bfloat> %v0, bfloat %bh, i64 1
ret <2 x bfloat> %v1
}

define <2 x half> @fold_ff2f16x2(float %a, float %b) {
; CHECK-LABEL: fold_ff2f16x2
; CHECK: cvt.rn.f16x2.f32
%ah = fptrunc float %a to half
%bh = fptrunc float %b to half
%v0 = insertelement <2 x half> poison, half %ah, i64 0
%v1 = insertelement <2 x half> %v0, half %bh, i64 1
ret <2 x half> %v1
}
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