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math-emu/op-2.h: Use statement expressions to prevent negative constant shift 

This modification is quoted from glibc 'commit <
sysdeps/unix/sysv/linux/sparc/sparc64/dl-procinfo.c: Moved to>
(fe0b1e854ad32a69b260)'

Signed-off-by: Vincent Chen <vincentc@andestech.com>
Acked-by: Greentime Hu <greentime@andestech.com>
Signed-off-by: Greentime Hu <greentime@andestech.com>
This commit is contained in:
Vincent Chen 2018-11-22 11:14:37 +08:00 committed by Greentime Hu
parent 44e92e0364
commit 7adb3e998f
1 changed files with 46 additions and 51 deletions
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97
include/math-emu/op-2.h
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@ -31,61 +31,56 @@
#define _FP_FRAC_HIGH_2(X) (X##_f1)
#define _FP_FRAC_LOW_2(X) (X##_f0)
#define _FP_FRAC_WORD_2(X,w) (X##_f##w)
#define _FP_FRAC_SLL_2(X, N) ( \
(void) (((N) < _FP_W_TYPE_SIZE) \
? ({ \
if (__builtin_constant_p(N) && (N) == 1) { \
X##_f1 = X##_f1 + X##_f1 + \
(((_FP_WS_TYPE) (X##_f0)) < 0); \
X##_f0 += X##_f0; \
} else { \
X##_f1 = X##_f1 << (N) | X##_f0 >> \
(_FP_W_TYPE_SIZE - (N)); \
X##_f0 <<= (N); \
} \
0; \
}) \
: ({ \
X##_f1 = X##_f0 << ((N) - _FP_W_TYPE_SIZE); \
X##_f0 = 0; \
})))
#define _FP_FRAC_SLL_2(X,N) \
do { \
if ((N) < _FP_W_TYPE_SIZE) \
{ \
if (__builtin_constant_p(N) && (N) == 1) \
{ \
X##_f1 = X##_f1 + X##_f1 + (((_FP_WS_TYPE)(X##_f0)) < 0); \
X##_f0 += X##_f0; \
} \
else \
{ \
X##_f1 = X##_f1 << (N) | X##_f0 >> (_FP_W_TYPE_SIZE - (N)); \
X##_f0 <<= (N); \
} \
} \
else \
{ \
X##_f1 = X##_f0 << ((N) - _FP_W_TYPE_SIZE); \
X##_f0 = 0; \
} \
} while (0)
#define _FP_FRAC_SRL_2(X,N) \
do { \
if ((N) < _FP_W_TYPE_SIZE) \
{ \
X##_f0 = X##_f0 >> (N) | X##_f1 << (_FP_W_TYPE_SIZE - (N)); \
X##_f1 >>= (N); \
} \
else \
{ \
X##_f0 = X##_f1 >> ((N) - _FP_W_TYPE_SIZE); \
X##_f1 = 0; \
} \
} while (0)
#define _FP_FRAC_SRL_2(X, N) ( \
(void) (((N) < _FP_W_TYPE_SIZE) \
? ({ \
X##_f0 = X##_f0 >> (N) | X##_f1 << (_FP_W_TYPE_SIZE - (N)); \
X##_f1 >>= (N); \
}) \
: ({ \
X##_f0 = X##_f1 >> ((N) - _FP_W_TYPE_SIZE); \
X##_f1 = 0; \
})))
/* Right shift with sticky-lsb. */
#define _FP_FRAC_SRS_2(X,N,sz) \
do { \
if ((N) < _FP_W_TYPE_SIZE) \
{ \
X##_f0 = (X##_f1 << (_FP_W_TYPE_SIZE - (N)) | X##_f0 >> (N) | \
(__builtin_constant_p(N) && (N) == 1 \
? X##_f0 & 1 \
: (X##_f0 << (_FP_W_TYPE_SIZE - (N))) != 0)); \
X##_f1 >>= (N); \
} \
else \
{ \
X##_f0 = (X##_f1 >> ((N) - _FP_W_TYPE_SIZE) | \
(((X##_f1 << (2*_FP_W_TYPE_SIZE - (N))) | X##_f0) != 0)); \
X##_f1 = 0; \
} \
} while (0)
#define _FP_FRAC_SRS_2(X, N, sz) ( \
(void) (((N) < _FP_W_TYPE_SIZE) \
? ({ \
X##_f0 = (X##_f1 << (_FP_W_TYPE_SIZE - (N)) | X##_f0 >> (N) \
| (__builtin_constant_p(N) && (N) == 1 \
? X##_f0 & 1 \
: (X##_f0 << (_FP_W_TYPE_SIZE - (N))) != 0)); \
X##_f1 >>= (N); \
}) \
: ({ \
X##_f0 = (X##_f1 >> ((N) - _FP_W_TYPE_SIZE) \
| ((((N) == _FP_W_TYPE_SIZE \
? 0 \
: (X##_f1 << (2*_FP_W_TYPE_SIZE - (N)))) \
| X##_f0) != 0)); \
X##_f1 = 0; \
})))
#define _FP_FRAC_ADDI_2(X,I) \
__FP_FRAC_ADDI_2(X##_f1, X##_f0, I)