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Fix missing truncation UNDERFLOW.

This commit is contained in:
Marcus Shawcroft 2012-11-13 17:01:05 +00:00
parent 640ac3f1bf
commit 47594329a9
3 changed files with 36 additions and 30 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2012-11-13 Marcus Shawcroft <marcus.shawcroft@linaro.org>
* soft-fp/op-common.h (_FP_PACK_SEMIRAW): Move underflow
detection to immediately after _FP_ROUND().
* soft-fp/soft-fp.h (_FP_ROUND): Don't round if working
bits are 0.
2012-11-11 David S. Miller <davem@davemloft.net> 2012-11-11 David S. Miller <davem@davemloft.net>
* sysdeps/unix/sysv/linux/sparc/sparc64/get_clockfreq.c: Include * sysdeps/unix/sysv/linux/sparc/sparc64/get_clockfreq.c: Include

25
soft-fp/op-common.h
View File

@ -134,6 +134,12 @@ do { \
#define _FP_PACK_SEMIRAW(fs, wc, X) \ #define _FP_PACK_SEMIRAW(fs, wc, X) \
do { \ do { \
_FP_ROUND(wc, X); \ _FP_ROUND(wc, X); \
if (X##_e == 0 && !_FP_FRAC_ZEROP_##wc(X)) \
{ \
if ((FP_CUR_EXCEPTIONS & FP_EX_INEXACT) \
|| (FP_TRAPPING_EXCEPTIONS & FP_EX_UNDERFLOW)) \
FP_SET_EXCEPTION(FP_EX_UNDERFLOW); \
} \
if (_FP_FRAC_HIGH_##fs(X) \ if (_FP_FRAC_HIGH_##fs(X) \
& (_FP_OVERFLOW_##fs >> 1)) \ & (_FP_OVERFLOW_##fs >> 1)) \
{ \ { \
@ -143,24 +149,15 @@ do { \
_FP_OVERFLOW_SEMIRAW(fs, wc, X); \ _FP_OVERFLOW_SEMIRAW(fs, wc, X); \
} \ } \
_FP_FRAC_SRL_##wc(X, _FP_WORKBITS); \ _FP_FRAC_SRL_##wc(X, _FP_WORKBITS); \
if (!_FP_EXP_NORMAL(fs, wc, X) && !_FP_FRAC_ZEROP_##wc(X)) \ if (X##_e == _FP_EXPMAX_##fs && !_FP_FRAC_ZEROP_##wc(X)) \
{ \ { \
if (X##_e == 0) \ if (!_FP_KEEPNANFRACP) \
{ \ { \
if ((FP_CUR_EXCEPTIONS & FP_EX_INEXACT) \ _FP_FRAC_SET_##wc(X, _FP_NANFRAC_##fs); \
|| (FP_TRAPPING_EXCEPTIONS & FP_EX_UNDERFLOW)) \ X##_s = _FP_NANSIGN_##fs; \
FP_SET_EXCEPTION(FP_EX_UNDERFLOW); \
} \ } \
else \ else \
{ \ _FP_FRAC_HIGH_RAW_##fs(X) |= _FP_QNANBIT_##fs; \
if (!_FP_KEEPNANFRACP) \
{ \
_FP_FRAC_SET_##wc(X, _FP_NANFRAC_##fs); \
X##_s = _FP_NANSIGN_##fs; \
} \
else \
_FP_FRAC_HIGH_RAW_##fs(X) |= _FP_QNANBIT_##fs; \
} \
} \ } \
} while (0) } while (0)

34
soft-fp/soft-fp.h
View File

@ -158,22 +158,24 @@ do { \
#define _FP_ROUND(wc, X) \ #define _FP_ROUND(wc, X) \
do { \ do { \
if (_FP_FRAC_LOW_##wc(X) & 7) \ if (_FP_FRAC_LOW_##wc(X) & 7) \
FP_SET_EXCEPTION(FP_EX_INEXACT); \ { \
switch (FP_ROUNDMODE) \ FP_SET_EXCEPTION(FP_EX_INEXACT); \
{ \ switch (FP_ROUNDMODE) \
case FP_RND_NEAREST: \ { \
_FP_ROUND_NEAREST(wc,X); \ case FP_RND_NEAREST: \
break; \ _FP_ROUND_NEAREST(wc,X); \
case FP_RND_ZERO: \ break; \
_FP_ROUND_ZERO(wc,X); \ case FP_RND_ZERO: \
break; \ _FP_ROUND_ZERO(wc,X); \
case FP_RND_PINF: \ break; \
_FP_ROUND_PINF(wc,X); \ case FP_RND_PINF: \
break; \ _FP_ROUND_PINF(wc,X); \
case FP_RND_MINF: \ break; \
_FP_ROUND_MINF(wc,X); \ case FP_RND_MINF: \
break; \ _FP_ROUND_MINF(wc,X); \
} \ break; \
} \
} \
} while (0) } while (0)
#define FP_CLS_NORMAL 0 #define FP_CLS_NORMAL 0