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Improved handling of integer inputs to the new sum() implementation.

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FossilOrigin-Name: 31561c63bde6af2210296810fd66232b935033b4d26273a6b8a52142c54b4e12
This commit is contained in:
drh
2023-07-06 20:34:06 +00:00
parent 68c88ea04f
commit 7d0103bb06
3 changed files with 23 additions and 14 deletions
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manifest
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@@ -1,5 +1,5 @@
C A\smore\sprecise\simplementation\sof\ssqlite3RealToI64().
D 2023-07-06T18:29:15.324
C Improved\shandling\sof\sinteger\sinputs\sto\sthe\snew\ssum()\simplementation.
D 2023-07-06T20:34:06.486
F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
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F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -590,7 +590,7 @@ F src/delete.c cd5f5cd06ed0b6a882ec1a8c2a0d73b3cecb28479ad19e9931c4706c5e2182be
F src/expr.c 8d1656b65e26af3e34f78e947ac423f0d20c214ed25a67486e433bf16ca6b543
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F src/fkey.c a7fcbf7e66d14dbb73cf49f31489ebf66d0e6006c62b95246924a3bae9f37b36
F src/func.c 994a3a30d36c079c6e26d6653d770153675590daa549d3692eb38c5ac05dc663
F src/func.c b2325dc2fb0b43874fa5f2ae4e83262bdda952fc317b294dfca5ce70d5049bcd
F src/global.c a16553245e315ee0cda8f9b0bf744efef9dc99f86e9d77f58975ea58824ded92
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F src/hash.h 3340ab6e1d13e725571d7cee6d3e3135f0779a7d8e76a9ce0a85971fa3953c51
@@ -2043,8 +2043,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
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# Remove this line to create a well-formed Fossil manifest.

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@@ -1 +1 @@
8813317cb52990d90bd48de163b6e35ddcad2b6f3187aa28b28e2e088b4489ce
31561c63bde6af2210296810fd66232b935033b4d26273a6b8a52142c54b4e12

23
src/func.c
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@@ -1704,11 +1704,14 @@ static void kahanBabuskaNeumaierStep(
** Add a (possibly large) integer to the running sum.
*/
static void kahanBabuskaNeumaierStepInt64(volatile SumCtx *pSum, i64 iVal){
volatile double rVal = (double)iVal;
kahanBabuskaNeumaierStep(pSum, rVal);
if( iVal<=-4503599627370496 || iVal>=+4503599627370496 ){
double rDiff = (double)(iVal - (i64)rVal);
kahanBabuskaNeumaierStep(pSum, rDiff);
i64 iBig, iSm;
iSm = iVal % 16384;
iBig = iVal - iSm;
kahanBabuskaNeumaierStep(pSum, iBig);
kahanBabuskaNeumaierStep(pSum, iSm);
}else{
kahanBabuskaNeumaierStep(pSum, (double)iVal);
}
}
@@ -1716,11 +1719,17 @@ static void kahanBabuskaNeumaierStepInt64(volatile SumCtx *pSum, i64 iVal){
** Initialize the Kahan-Babaska-Neumaier sum from a 64-bit integer
*/
static void kahanBabuskaNeumaierInit(
volatile SumCtx *pSum,
volatile SumCtx *p,
i64 iVal
){
pSum->rSum = (double)iVal;
pSum->rErr = (double)(iVal - (i64)pSum->rSum);
if( iVal<=-4503599627370496 || iVal>=+4503599627370496 ){
i64 iSm = iVal % 16384;
p->rSum = (double)(iVal - iSm);
p->rErr = (double)iSm;
}else{
p->rSum = (double)iVal;
p->rErr = 0.0;
}
}
/*