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73b770d782
The z13 vector facility includes some instructions that operate only on the high f64 in a v2f64, effectively extending the FP register set from 16 to 32 registers. It's still better to use the old instructions if the operands happen to fit though, since the older instructions have a shorter encoding. Based on a patch by Richard Sandiford. llvm-svn: 236524
189 lines
6.0 KiB
LLVM
189 lines
6.0 KiB
LLVM
; Test 64-bit floating-point comparison. The tests assume a z10 implementation
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; of select, using conditional branches rather than LOCGR.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 \
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; RUN: | FileCheck -check-prefix=CHECK -check-prefix=CHECK-SCALAR %s
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; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z13 \
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; RUN: | FileCheck -check-prefix=CHECK -check-prefix=CHECK-VECTOR %s
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declare double @foo()
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; Check comparison with registers.
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define i64 @f1(i64 %a, i64 %b, double %f1, double %f2) {
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; CHECK-LABEL: f1:
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; CHECK: cdbr %f0, %f2
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; CHECK-SCALAR-NEXT: je
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; CHECK-SCALAR: lgr %r2, %r3
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; CHECK-VECTOR-NEXT: locgrne %r2, %r3
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; CHECK: br %r14
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%cond = fcmp oeq double %f1, %f2
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%res = select i1 %cond, i64 %a, i64 %b
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ret i64 %res
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}
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; Check the low end of the CDB range.
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define i64 @f2(i64 %a, i64 %b, double %f1, double *%ptr) {
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; CHECK-LABEL: f2:
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; CHECK: cdb %f0, 0(%r4)
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; CHECK-SCALAR-NEXT: je
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; CHECK-SCALAR: lgr %r2, %r3
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; CHECK-VECTOR-NEXT: locgrne %r2, %r3
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; CHECK: br %r14
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%f2 = load double , double *%ptr
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%cond = fcmp oeq double %f1, %f2
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%res = select i1 %cond, i64 %a, i64 %b
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ret i64 %res
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}
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; Check the high end of the aligned CDB range.
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define i64 @f3(i64 %a, i64 %b, double %f1, double *%base) {
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; CHECK-LABEL: f3:
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; CHECK: cdb %f0, 4088(%r4)
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; CHECK-SCALAR-NEXT: je
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; CHECK-SCALAR: lgr %r2, %r3
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; CHECK-VECTOR-NEXT: locgrne %r2, %r3
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; CHECK: br %r14
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%ptr = getelementptr double, double *%base, i64 511
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%f2 = load double , double *%ptr
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%cond = fcmp oeq double %f1, %f2
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%res = select i1 %cond, i64 %a, i64 %b
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ret i64 %res
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}
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; Check the next doubleword up, which needs separate address logic.
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; Other sequences besides this one would be OK.
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define i64 @f4(i64 %a, i64 %b, double %f1, double *%base) {
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; CHECK-LABEL: f4:
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; CHECK: aghi %r4, 4096
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; CHECK: cdb %f0, 0(%r4)
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; CHECK-SCALAR-NEXT: je
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; CHECK-SCALAR: lgr %r2, %r3
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; CHECK-VECTOR-NEXT: locgrne %r2, %r3
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; CHECK: br %r14
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%ptr = getelementptr double, double *%base, i64 512
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%f2 = load double , double *%ptr
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%cond = fcmp oeq double %f1, %f2
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%res = select i1 %cond, i64 %a, i64 %b
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ret i64 %res
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}
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; Check negative displacements, which also need separate address logic.
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define i64 @f5(i64 %a, i64 %b, double %f1, double *%base) {
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; CHECK-LABEL: f5:
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; CHECK: aghi %r4, -8
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; CHECK: cdb %f0, 0(%r4)
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; CHECK-SCALAR-NEXT: je
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; CHECK-SCALAR: lgr %r2, %r3
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; CHECK-VECTOR-NEXT: locgrne %r2, %r3
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; CHECK: br %r14
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%ptr = getelementptr double, double *%base, i64 -1
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%f2 = load double , double *%ptr
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%cond = fcmp oeq double %f1, %f2
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%res = select i1 %cond, i64 %a, i64 %b
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ret i64 %res
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}
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; Check that CDB allows indices.
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define i64 @f6(i64 %a, i64 %b, double %f1, double *%base, i64 %index) {
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; CHECK-LABEL: f6:
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; CHECK: sllg %r1, %r5, 3
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; CHECK: cdb %f0, 800(%r1,%r4)
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; CHECK-SCALAR-NEXT: je
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; CHECK-SCALAR: lgr %r2, %r3
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; CHECK-VECTOR-NEXT: locgrne %r2, %r3
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; CHECK: br %r14
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%ptr1 = getelementptr double, double *%base, i64 %index
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%ptr2 = getelementptr double, double *%ptr1, i64 100
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%f2 = load double , double *%ptr2
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%cond = fcmp oeq double %f1, %f2
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%res = select i1 %cond, i64 %a, i64 %b
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ret i64 %res
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}
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; Check that comparisons of spilled values can use CDB rather than CDBR.
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define double @f7(double *%ptr0) {
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; CHECK-LABEL: f7:
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; CHECK: brasl %r14, foo@PLT
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; CHECK-SCALAR: cdb {{%f[0-9]+}}, 160(%r15)
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; CHECK: br %r14
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%ptr1 = getelementptr double, double *%ptr0, i64 2
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%ptr2 = getelementptr double, double *%ptr0, i64 4
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%ptr3 = getelementptr double, double *%ptr0, i64 6
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%ptr4 = getelementptr double, double *%ptr0, i64 8
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%ptr5 = getelementptr double, double *%ptr0, i64 10
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%ptr6 = getelementptr double, double *%ptr0, i64 12
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%ptr7 = getelementptr double, double *%ptr0, i64 14
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%ptr8 = getelementptr double, double *%ptr0, i64 16
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%ptr9 = getelementptr double, double *%ptr0, i64 18
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%ptr10 = getelementptr double, double *%ptr0, i64 20
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%val0 = load double , double *%ptr0
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%val1 = load double , double *%ptr1
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%val2 = load double , double *%ptr2
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%val3 = load double , double *%ptr3
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%val4 = load double , double *%ptr4
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%val5 = load double , double *%ptr5
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%val6 = load double , double *%ptr6
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%val7 = load double , double *%ptr7
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%val8 = load double , double *%ptr8
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%val9 = load double , double *%ptr9
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%val10 = load double , double *%ptr10
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%ret = call double @foo()
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%cmp0 = fcmp olt double %ret, %val0
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%cmp1 = fcmp olt double %ret, %val1
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%cmp2 = fcmp olt double %ret, %val2
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%cmp3 = fcmp olt double %ret, %val3
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%cmp4 = fcmp olt double %ret, %val4
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%cmp5 = fcmp olt double %ret, %val5
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%cmp6 = fcmp olt double %ret, %val6
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%cmp7 = fcmp olt double %ret, %val7
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%cmp8 = fcmp olt double %ret, %val8
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%cmp9 = fcmp olt double %ret, %val9
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%cmp10 = fcmp olt double %ret, %val10
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%sel0 = select i1 %cmp0, double %ret, double 0.0
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%sel1 = select i1 %cmp1, double %sel0, double 1.0
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%sel2 = select i1 %cmp2, double %sel1, double 2.0
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%sel3 = select i1 %cmp3, double %sel2, double 3.0
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%sel4 = select i1 %cmp4, double %sel3, double 4.0
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%sel5 = select i1 %cmp5, double %sel4, double 5.0
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%sel6 = select i1 %cmp6, double %sel5, double 6.0
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%sel7 = select i1 %cmp7, double %sel6, double 7.0
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%sel8 = select i1 %cmp8, double %sel7, double 8.0
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%sel9 = select i1 %cmp9, double %sel8, double 9.0
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%sel10 = select i1 %cmp10, double %sel9, double 10.0
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ret double %sel10
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}
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; Check comparison with zero.
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define i64 @f8(i64 %a, i64 %b, double %f) {
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; CHECK-LABEL: f8:
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; CHECK-SCALAR: ltdbr %f0, %f0
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; CHECK-SCALAR-NEXT: je
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; CHECK-SCALAR: lgr %r2, %r3
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; CHECK-VECTOR: lzdr %f1
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; CHECK-VECTOR-NEXT: cdbr %f0, %f1
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; CHECK-VECTOR-NEXT: locgrne %r2, %r3
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; CHECK: br %r14
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%cond = fcmp oeq double %f, 0.0
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%res = select i1 %cond, i64 %a, i64 %b
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ret i64 %res
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}
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; Check the comparison can be reversed if that allows CDB to be used,
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define i64 @f9(i64 %a, i64 %b, double %f2, double *%ptr) {
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; CHECK-LABEL: f9:
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; CHECK: cdb %f0, 0(%r4)
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; CHECK-SCALAR-NEXT: jl
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; CHECK-SCALAR: lgr %r2, %r3
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; CHECK-VECTOR-NEXT: locgrnl %r2, %r3
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; CHECK: br %r14
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%f1 = load double , double *%ptr
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%cond = fcmp ogt double %f1, %f2
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%res = select i1 %cond, i64 %a, i64 %b
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ret i64 %res
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}
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