Benchmark

incremental/QF_ABVFP/20210211-Vector/Railway_C/b8ba2a1f.smt2

These benchmarks were generated using VectorCAST's [1] automated test-case
generation capability, an industrial symbolic execution engine targeted towards
generating high-coverage test-suites for safety-critical C and C++.

While VectorCAST can target multiple SMT solvers via a generic Python API, it
does not support generating SMTLIB2 files directly. Consequently, these
benchmarks were obtained using Z3's [2] 'smtlib2_log' [3] facility to capture
all interactions between VectorCAST and the SMT solver, including all push/pop
commands.

The input to the test-case generator was:

    * A *C* file,

    * which came from project from the *Railway* market

[1] https://www.vector.com/int/en/products/products-a-z/software/vectorcast

[2] Leonardo de Moura, Nikolaj Bjorner (2008), "Z3: An Efficient SMT Solver".
In: Proceedings of TACAS 2008.

[3] Z3 4.8.7 release notes:
https://raw.githubusercontent.com/Z3Prover/z3/master/RELEASE_NOTES
Benchmark
Size121556
Compressed Size3678
License Creative Commons Attribution 4.0 International (CC-BY-4.0)
Categoryindustrial
First Occurrence2021-07-18
Generated ByAndrew V. Jones (andrew.jones@vector.com)
Generated On2021-02-11 00:00:00
GeneratorVectorCAST 2020sp6, ATG 2.0c-pre
Dolmen OK1
strict Dolmen OK1
check-sat calls41
Query 1
Status unknown
Inferred Status None
Size 1540
Compressed Size935
Max. Term Depth3
Asserts 1
Declared Functions0
Declared Constants1
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite1 distinct1 bvult1
Query 2
Status unknown
Inferred Status None
Size 2503
Compressed Size1043
Max. Term Depth7
Asserts 2
Declared Functions0
Declared Constants1
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite1 and1 distinct3 let1
bvadd1 bvmul7 bvurem1 bvult1
Query 3
Status unknown
Inferred Status None
Size 2624
Compressed Size1052
Max. Term Depth7
Asserts 3
Declared Functions0
Declared Constants1
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite1 and2 distinct5 let1
bvadd1 bvmul7 bvurem1 bvult1
Query 4
Status unknown
Inferred Status None
Size 2749
Compressed Size1067
Max. Term Depth7
Asserts 4
Declared Functions0
Declared Constants1
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite2 and2 =1 distinct6
let1 bvadd1 bvmul7 bvurem1
bvult1
Query 5
Status unknown
Inferred Status None
Size 3237
Compressed Size1181
Max. Term Depth7
Asserts 5
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite3 and3 =1 distinct6
let2 bvadd1 bvmul7 bvurem1
bvult1 bvule1 select1 store3
Query 6
Status unknown
Inferred Status None
Size 11045
Compressed Size2292
Max. Term Depth37
Asserts 6
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite5 and4 =1 distinct46
let32 extract70 bvnot99 bvand62
bvadd17 bvmul15 bvurem1 bvult3
bvule2 bvuge1 zero_extend9 select17
store7
Query 7
Status unknown
Inferred Status None
Size 11744
Compressed Size2454
Max. Term Depth37
Asserts 6
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite5 and4 =1 distinct48
let32 extract70 bvnot99 bvand62
bvadd18 bvmul15 bvurem1 bvult3
bvule2 bvuge1 zero_extend9 select19
store8 fp4 fp.add2 fp.div1
fp.leq1 fp.geq1 roundTowardPositive3 to_fp1
Query 8
Status unknown
Inferred Status None
Size 11745
Compressed Size2454
Max. Term Depth37
Asserts 6
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite5 and4 =1 distinct48
let32 extract70 bvnot99 bvand62
bvadd18 bvmul15 bvurem1 bvult3
bvule2 bvuge1 zero_extend9 select19
store8 fp4 fp.add2 fp.div1
fp.leq1 fp.geq1 roundTowardPositive3 to_fp1
Query 9
Status unknown
Inferred Status None
Size 11008
Compressed Size2286
Max. Term Depth37
Asserts 6
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite5 and4 =1 distinct45
let32 extract70 bvnot99 bvand62
bvadd17 bvmul15 bvurem1 bvult3
bvule2 bvuge1 zero_extend9 select17
store7
Query 10
Status unknown
Inferred Status None
Size 11325
Compressed Size2365
Max. Term Depth37
Asserts 6
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite6 not1 and4 =2
distinct46 let32 extract71 bvnot99
bvand63 bvadd18 bvmul15 bvurem1
bvult3 bvule2 bvuge1 zero_extend10
select19 store8
Query 11
Status unknown
Inferred Status None
Size 11010
Compressed Size2288
Max. Term Depth37
Asserts 6
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite5 and4 =1 distinct45
let32 extract70 bvnot99 bvand62
bvadd17 bvmul15 bvurem1 bvult3
bvule2 bvuge1 zero_extend9 select17
store7
Query 12
Status unknown
Inferred Status None
Size 11011
Compressed Size2288
Max. Term Depth37
Asserts 6
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite5 and4 =1 distinct45
let32 extract70 bvnot99 bvand62
bvadd17 bvmul15 bvurem1 bvult3
bvule2 bvuge1 zero_extend9 select17
store7
Query 13
Status unknown
Inferred Status None
Size 4496
Compressed Size1379
Max. Term Depth12
Asserts 6
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite6 and4 =1 distinct7
let7 bvadd7 bvmul10 bvurem1
bvult2 bvule2 select11 store7
fp.lt1 to_fp1
Query 14
Status unknown
Inferred Status None
Size 5748
Compressed Size1386
Max. Term Depth12
Asserts 7
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite9 and5 =1 distinct8
let12 bvadd13 bvmul13 bvurem1
bvult3 bvule3 select21 store11
fp.lt2 to_fp2
Query 15
Status unknown
Inferred Status None
Size 7213
Compressed Size1460
Max. Term Depth13
Asserts 8
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite14 and6 =1 distinct10
let18 bvadd19 bvmul16 bvurem1
bvult4 bvule4 select31 store15
fp1 fp.lt3 fp.gt1 to_fp4
Query 16
Status unknown
Inferred Status None
Size 7214
Compressed Size1466
Max. Term Depth13
Asserts 8
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite14 and6 =1 distinct10
let18 bvadd19 bvmul16 bvurem1
bvult4 bvule4 select31 store15
fp1 fp.lt3 fp.gt1 to_fp4
Query 17
Status unknown
Inferred Status None
Size 13518
Compressed Size2460
Max. Term Depth37
Asserts 8
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite11 and6 =1 distinct47
let42 extract70 bvnot99 bvand62
bvadd29 bvmul21 bvurem1 bvult5
bvule4 bvuge1 zero_extend9 select37
store15 fp.lt2 to_fp2
Query 18
Status unknown
Inferred Status None
Size 6981
Compressed Size1462
Max. Term Depth12
Asserts 8
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite12 and6 =1 distinct9
let17 extract1 bvadd19 bvmul16
bvurem1 bvult4 bvule4 bvslt1
sign_extend1 select31 store15 fp.lt2
to_fp2
Query 19
Status unknown
Inferred Status None
Size 8211
Compressed Size1471
Max. Term Depth12
Asserts 9
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite15 and7 =1 distinct10
let22 extract2 bvadd25 bvmul19
bvurem1 bvult5 bvule5 bvslt2
sign_extend2 select41 store19 fp.lt2
to_fp2
Query 20
Status unknown
Inferred Status None
Size 9769
Compressed Size1547
Max. Term Depth14
Asserts 10
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite20 and8 =1 distinct12
let29 extract5 bvadd31 bvmul22
bvurem1 bvult6 bvule6 bvslt3
bvsgt1 sign_extend5 select51 store23
fp.lt2 to_fp2
Query 21
Status unknown
Inferred Status None
Size 9770
Compressed Size1550
Max. Term Depth14
Asserts 10
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite20 and8 =1 distinct12
let29 extract5 bvadd31 bvmul22
bvurem1 bvult6 bvule6 bvslt3
bvsgt1 sign_extend5 select51 store23
fp.lt2 to_fp2
Query 22
Status unknown
Inferred Status None
Size 15981
Compressed Size2536
Max. Term Depth37
Asserts 10
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite17 and8 =1 distinct49
let52 extract72 bvnot99 bvand62
bvadd41 bvmul27 bvurem1 bvult7
bvule6 bvuge1 bvslt2 zero_extend9
sign_extend2 select57 store23 fp.lt2
to_fp2
Query 23
Status unknown
Inferred Status None
Size 9466
Compressed Size1486
Max. Term Depth12
Asserts 10
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite18 and8 =1 distinct11
let27 extract2 bvadd31 bvmul22
bvurem1 bvult6 bvule6 bvslt2
sign_extend2 select51 store23 fp.lt3
to_fp3
Query 24
Status unknown
Inferred Status None
Size 10718
Compressed Size1490
Max. Term Depth12
Asserts 11
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite21 and9 =1 distinct12
let32 extract2 bvadd37 bvmul25
bvurem1 bvult7 bvule7 bvslt2
sign_extend2 select61 store27 fp.lt4
to_fp4
Query 25
Status unknown
Inferred Status None
Size 12554
Compressed Size1638
Max. Term Depth12
Asserts 12
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite25 and10 =1 distinct16
let38 extract2 bvadd43 bvmul28
bvurem1 bvult8 bvule8 bvslt2
sign_extend2 select71 store31 fp5
fp.add1 fp.mul1 fp.leq1 fp.lt5
fp.geq1 roundTowardPositive2 to_fp6
Query 26
Status unknown
Inferred Status None
Size 14318
Compressed Size1720
Max. Term Depth13
Asserts 13
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite30 and11 =1 distinct18
let44 extract2 bvadd49 bvmul31
bvurem1 bvult9 bvule9 bvslt3
sign_extend2 select81 store35 fp8
fp.add2 fp.mul2 fp.leq1 fp.lt6
fp.geq1 roundTowardPositive4 roundTowardZero1 fp.to_sbv1
to_fp8
Query 27
Status unknown
Inferred Status None
Size 16082
Compressed Size1721
Max. Term Depth13
Asserts 14
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite35 and12 =1 distinct20
let50 extract2 bvadd55 bvmul34
bvurem1 bvult10 bvule10 bvslt4
sign_extend2 select91 store39 fp11
fp.add3 fp.mul3 fp.leq1 fp.lt7
fp.geq1 roundTowardPositive6 roundTowardZero2 fp.to_sbv2
to_fp10
Query 28
Status unknown
Inferred Status None
Size 18055
Compressed Size1796
Max. Term Depth14
Asserts 15
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite42 not1 and13 =1
distinct23 let58 extract2 bvadd61
bvmul37 bvurem1 bvult11 bvule11
bvslt5 bvsgt1 sign_extend2 select101
store43 fp14 fp.add4 fp.mul4
fp.leq1 fp.lt8 fp.geq1 roundTowardPositive8
roundTowardZero3 fp.to_sbv3 to_fp12
Query 29
Status unknown
Inferred Status None
Size 20028
Compressed Size1811
Max. Term Depth14
Asserts 16
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite49 not2 and14 =1
distinct26 let66 extract2 bvadd67
bvmul40 bvurem1 bvult12 bvule12
bvslt6 bvsgt2 sign_extend2 select111
store47 fp17 fp.add5 fp.mul5
fp.leq1 fp.lt9 fp.geq1 roundTowardPositive10
roundTowardZero4 fp.to_sbv4 to_fp14
Query 30
Status unknown
Inferred Status None
Size 27796
Compressed Size2874
Max. Term Depth37
Asserts 17
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite51 not2 and15 =1
distinct65 let96 extract72 bvnot99
bvand62 bvadd83 bvmul48 bvurem1
bvult14 bvule13 bvuge1 bvslt6
bvsgt2 zero_extend9 sign_extend2 select127
store51 fp17 fp.add5 fp.mul5
fp.leq1 fp.lt9 fp.geq1 roundTowardPositive10
roundTowardZero4 fp.to_sbv4 to_fp14
Query 31
Status unknown
Inferred Status None
Size 21287
Compressed Size1828
Max. Term Depth14
Asserts 17
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite52 not3 and15 =1
distinct27 let71 extract2 bvadd73
bvmul43 bvurem1 bvult13 bvule13
bvslt6 bvsgt2 sign_extend2 select121
store51 fp17 fp.add5 fp.mul5
fp.leq1 fp.lt10 fp.geq1 roundTowardPositive10
roundTowardZero4 fp.to_sbv4 to_fp15
Query 32
Status unknown
Inferred Status None
Size 22545
Compressed Size1842
Max. Term Depth14
Asserts 18
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite55 not4 and16 =1
distinct28 let76 extract2 bvadd79
bvmul46 bvurem1 bvult14 bvule14
bvslt6 bvsgt2 sign_extend2 select131
store55 fp17 fp.add5 fp.mul5
fp.leq1 fp.lt11 fp.geq1 roundTowardPositive10
roundTowardZero4 fp.to_sbv4 to_fp16
Query 33
Status unknown
Inferred Status None
Size 24381
Compressed Size1850
Max. Term Depth14
Asserts 19
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite59 not4 and17 =1
distinct32 let82 extract2 bvadd85
bvmul49 bvurem1 bvult15 bvule15
bvslt6 bvsgt2 sign_extend2 select141
store59 fp22 fp.add6 fp.mul6
fp.leq2 fp.lt12 fp.geq2 roundTowardPositive12
roundTowardZero4 fp.to_sbv4 to_fp18
Query 34
Status unknown
Inferred Status None
Size 26188
Compressed Size1871
Max. Term Depth14
Asserts 20
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite64 not5 and18 =1
distinct34 let89 extract2 bvadd91
bvmul52 bvurem1 bvult16 bvule16
bvslt7 bvsgt2 sign_extend2 select151
store63 fp25 fp.add7 fp.mul7
fp.leq2 fp.lt13 fp.geq2 roundTowardPositive14
roundTowardZero5 fp.to_sbv5 to_fp20
Query 35
Status unknown
Inferred Status None
Size 27995
Compressed Size1882
Max. Term Depth14
Asserts 21
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite69 not6 and19 =1
distinct36 let96 extract2 bvadd97
bvmul55 bvurem1 bvult17 bvule17
bvslt8 bvsgt2 sign_extend2 select161
store67 fp28 fp.add8 fp.mul8
fp.leq2 fp.lt14 fp.geq2 roundTowardPositive16
roundTowardZero6 fp.to_sbv6 to_fp22
Query 36
Status unknown
Inferred Status None
Size 29968
Compressed Size1886
Max. Term Depth14
Asserts 22
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite76 not7 and20 =1
distinct39 let104 extract2 bvadd103
bvmul58 bvurem1 bvult18 bvule18
bvslt9 bvsgt3 sign_extend2 select171
store71 fp31 fp.add9 fp.mul9
fp.leq2 fp.lt15 fp.geq2 roundTowardPositive18
roundTowardZero7 fp.to_sbv7 to_fp24
Query 37
Status unknown
Inferred Status None
Size 31941
Compressed Size1888
Max. Term Depth14
Asserts 23
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite83 not8 and21 =1
distinct42 let112 extract2 bvadd109
bvmul61 bvurem1 bvult19 bvule19
bvslt10 bvsgt4 sign_extend2 select181
store75 fp34 fp.add10 fp.mul10
fp.leq2 fp.lt16 fp.geq2 roundTowardPositive20
roundTowardZero8 fp.to_sbv8 to_fp26
Query 38
Status unknown
Inferred Status None
Size 32354
Compressed Size1912
Max. Term Depth14
Asserts 24
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite84 not8 and22 =1
distinct43 let113 extract2 bvadd109
bvmul61 bvurem1 bvult19 bvule20
bvslt10 bvsgt4 sign_extend2 select182
store78 fp34 fp.add10 fp.mul10
fp.leq2 fp.lt16 fp.geq2 roundTowardPositive20
roundTowardZero8 fp.to_sbv8 to_fp26
Query 39
Status unknown
Inferred Status None
Size 33659
Compressed Size1978
Max. Term Depth14
Asserts 25
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite87 not9 and23 =1
distinct44 let119 extract3 bvadd116
bvmul64 bvudiv1 bvurem1 bvult20
bvule21 bvugt1 bvslt10 bvsgt4
zero_extend1 sign_extend2 select192 store82
fp34 fp.add10 fp.mul10 fp.leq2
fp.lt16 fp.geq2 roundTowardPositive20 roundTowardZero8
fp.to_sbv8 to_fp26
Query 40
Status unknown
Inferred Status None
Size 34964
Compressed Size1985
Max. Term Depth14
Asserts 26
Declared Functions0
Declared Constants3
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite90 not10 and24 =1
distinct45 let125 extract4 bvadd123
bvmul67 bvudiv2 bvurem1 bvult21
bvule22 bvugt2 bvslt10 bvsgt4
zero_extend2 sign_extend2 select202 store86
fp34 fp.add10 fp.mul10 fp.leq2
fp.lt16 fp.geq2 roundTowardPositive20 roundTowardZero8
fp.to_sbv8 to_fp26
Query 41
Status unknown
Inferred Status None
Size 35565
Compressed Size2032
Max. Term Depth14
Asserts 27
Declared Functions0
Declared Constants4
Declared Sorts 0
Defined Functions0
Defined Recursive Functions 0
Defined Sorts0
Constants0
Declared Datatypes0

Symbols

ite91 not10 and25 =1
distinct47 let126 extract4 bvadd123
bvmul67 bvudiv2 bvurem1 bvult21
bvule23 bvugt2 bvslt10 bvsgt5
zero_extend5 sign_extend2 select203 store89
fp34 fp.add10 fp.mul10 fp.leq2
fp.lt16 fp.geq2 roundTowardPositive20 roundTowardZero8
fp.to_sbv8 to_fp26