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Break out of potentially infinite rescaling loops in xLARGV, xLARTG and xLARTGP #419

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Merged
langou merged 11 commits into from
Feb 18, 2021
Merged

Break out of potentially infinite rescaling loops in xLARGV, xLARTG and xLARTGP #419

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3c125d6
Merge pull request #1 from Reference-LAPACK/master
martin-frbg Dec 21, 2019
de1fbc2
Merge pull request #2 from Reference-LAPACK/master
martin-frbg Jun 6, 2020
600c5e9
Break out of potentially infinite rescaling loop after 20 iterations
martin-frbg Jun 6, 2020
ef8afbe
Break out of potentially infinite rescaling loop after 20 iterations
martin-frbg Jun 6, 2020
ac3f163
Break out of potentially infinite rescaling loop after 20 iterations
martin-frbg Jun 6, 2020
7439cc0
Break out of potentially infinite rescaling loop after 20 iterations
martin-frbg Jun 6, 2020
267d3d1
Break out of potentially infinite rescaling loop after 20 iterations
martin-frbg Jun 6, 2020
2e9b52c
Break out of potentially infinite rescaling loop after 20 iterations
martin-frbg Jun 6, 2020
9297ae4
Break out of potentially inifinite rescaling loop after 20 iterations
martin-frbg Jun 6, 2020
cd1db43
Break out of potentially infinite rescaling loop after 20 iterations
martin-frbg Jun 6, 2020
0065263
Break out of potentially infinite rescaling loop after 20 iterations
martin-frbg Jun 6, 2020
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2 changes: 1 addition & 1 deletion SRC/clargv.f
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Original file line number Diff line number Diff line change
Expand Up @@ -200,7 +200,7 @@ SUBROUTINE CLARGV( N, X, INCX, Y, INCY, C, INCC )
FS = FS*SAFMN2
GS = GS*SAFMN2
SCALE = SCALE*SAFMN2
IF( SCALE.GE.SAFMX2 )
IF( SCALE.GE.SAFMX2 .AND. COUNT .LT. 20 )
$ GO TO 10
ELSE IF( SCALE.LE.SAFMN2 ) THEN
IF( G.EQ.CZERO ) THEN
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2 changes: 1 addition & 1 deletion SRC/clartg.f
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Expand Up @@ -161,7 +161,7 @@ SUBROUTINE CLARTG( F, G, CS, SN, R )
FS = FS*SAFMN2
GS = GS*SAFMN2
SCALE = SCALE*SAFMN2
IF( SCALE.GE.SAFMX2 )
IF( SCALE.GE.SAFMX2 .AND. COUNT .LT. 20)
$ GO TO 10
ELSE IF( SCALE.LE.SAFMN2 ) THEN
IF( G.EQ.CZERO.OR.SISNAN( ABS( G ) ) ) THEN
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2 changes: 1 addition & 1 deletion SRC/dlartg.f
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Expand Up @@ -163,7 +163,7 @@ SUBROUTINE DLARTG( F, G, CS, SN, R )
F1 = F1*SAFMN2
G1 = G1*SAFMN2
SCALE = MAX( ABS( F1 ), ABS( G1 ) )
IF( SCALE.GE.SAFMX2 )
IF( SCALE.GE.SAFMX2 .AND. COUNT .LT. 20)
$ GO TO 10
R = SQRT( F1**2+G1**2 )
CS = F1 / R
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2 changes: 1 addition & 1 deletion SRC/dlartgp.f
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Original file line number Diff line number Diff line change
Expand Up @@ -161,7 +161,7 @@ SUBROUTINE DLARTGP( F, G, CS, SN, R )
F1 = F1*SAFMN2
G1 = G1*SAFMN2
SCALE = MAX( ABS( F1 ), ABS( G1 ) )
IF( SCALE.GE.SAFMX2 )
IF( SCALE.GE.SAFMX2 .AND. COUNT .LT. 20 )
$ GO TO 10
R = SQRT( F1**2+G1**2 )
CS = F1 / R
Expand Down
2 changes: 1 addition & 1 deletion SRC/slartg.f
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Original file line number Diff line number Diff line change
Expand Up @@ -163,7 +163,7 @@ SUBROUTINE SLARTG( F, G, CS, SN, R )
F1 = F1*SAFMN2
G1 = G1*SAFMN2
SCALE = MAX( ABS( F1 ), ABS( G1 ) )
IF( SCALE.GE.SAFMX2 )
IF( SCALE.GE.SAFMX2 .AND. COUNT .LT. 20)
$ GO TO 10
R = SQRT( F1**2+G1**2 )
CS = F1 / R
Expand Down
2 changes: 1 addition & 1 deletion SRC/slartgp.f
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Original file line number Diff line number Diff line change
Expand Up @@ -161,7 +161,7 @@ SUBROUTINE SLARTGP( F, G, CS, SN, R )
F1 = F1*SAFMN2
G1 = G1*SAFMN2
SCALE = MAX( ABS( F1 ), ABS( G1 ) )
IF( SCALE.GE.SAFMX2 )
IF( SCALE.GE.SAFMX2 .AND. COUNT .LT. 20)
$ GO TO 10
R = SQRT( F1**2+G1**2 )
CS = F1 / R
Expand Down
2 changes: 1 addition & 1 deletion SRC/zlargv.f
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Original file line number Diff line number Diff line change
Expand Up @@ -201,7 +201,7 @@ SUBROUTINE ZLARGV( N, X, INCX, Y, INCY, C, INCC )
FS = FS*SAFMN2
GS = GS*SAFMN2
SCALE = SCALE*SAFMN2
IF( SCALE.GE.SAFMX2 )
IF( SCALE.GE.SAFMX2 .AND. COUNT .LT. 20 )
$ GO TO 10
ELSE IF( SCALE.LE.SAFMN2 ) THEN
IF( G.EQ.CZERO ) THEN
Expand Down
2 changes: 1 addition & 1 deletion SRC/zlartg.f
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Original file line number Diff line number Diff line change
Expand Up @@ -161,7 +161,7 @@ SUBROUTINE ZLARTG( F, G, CS, SN, R )
FS = FS*SAFMN2
GS = GS*SAFMN2
SCALE = SCALE*SAFMN2
IF( SCALE.GE.SAFMX2 )
IF( SCALE.GE.SAFMX2 .AND. COUNT .LT. 20 )
$ GO TO 10
ELSE IF( SCALE.LE.SAFMN2 ) THEN
IF( G.EQ.CZERO.OR.DISNAN( ABS( G ) ) ) THEN
Expand Down