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-rw-r--r--gcc/libgcc2.c223
1 files changed, 78 insertions, 145 deletions
diff --git a/gcc/libgcc2.c b/gcc/libgcc2.c
index 05cb315cb9d..34171ad9002 100644
--- a/gcc/libgcc2.c
+++ b/gcc/libgcc2.c
@@ -63,13 +63,9 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
DWtype
__negdi2 (DWtype u)
{
- DWunion w;
- DWunion uu;
-
- uu.ll = u;
-
- w.s.low = -uu.s.low;
- w.s.high = -uu.s.high - ((UWtype) w.s.low > 0);
+ const DWunion uu = {.ll = u};
+ const DWunion w = { {.low = -uu.s.low,
+ .high = -uu.s.high - ((UWtype) -uu.s.low > 0) } };
return w.ll;
}
@@ -79,9 +75,7 @@ __negdi2 (DWtype u)
Wtype
__addvsi3 (Wtype a, Wtype b)
{
- Wtype w;
-
- w = a + b;
+ const Wtype w = a + b;
if (b >= 0 ? w < a : w > a)
abort ();
@@ -94,9 +88,7 @@ __addvsi3 (Wtype a, Wtype b)
DWtype
__addvdi3 (DWtype a, DWtype b)
{
- DWtype w;
-
- w = a + b;
+ const DWtype w = a + b;
if (b >= 0 ? w < a : w > a)
abort ();
@@ -109,9 +101,7 @@ __addvdi3 (DWtype a, DWtype b)
Wtype
__subvsi3 (Wtype a, Wtype b)
{
- DWtype w;
-
- w = a - b;
+ const DWtype w = a - b;
if (b >= 0 ? w > a : w < a)
abort ();
@@ -124,9 +114,7 @@ __subvsi3 (Wtype a, Wtype b)
DWtype
__subvdi3 (DWtype a, DWtype b)
{
- DWtype w;
-
- w = a - b;
+ const DWtype w = a - b;
if (b >= 0 ? w > a : w < a)
abort ();
@@ -140,9 +128,7 @@ __subvdi3 (DWtype a, DWtype b)
Wtype
__mulvsi3 (Wtype a, Wtype b)
{
- DWtype w;
-
- w = (DWtype) a * (DWtype) b;
+ const DWtype w = (DWtype) a * (DWtype) b;
if (((a >= 0) == (b >= 0))
? (UDWtype) w > (UDWtype) (((DWtype) 1 << (WORD_SIZE - 1)) - 1)
@@ -157,9 +143,7 @@ __mulvsi3 (Wtype a, Wtype b)
Wtype
__negvsi2 (Wtype a)
{
- Wtype w;
-
- w = -a;
+ const Wtype w = -a;
if (a >= 0 ? w > 0 : w < 0)
abort ();
@@ -172,9 +156,7 @@ __negvsi2 (Wtype a)
DWtype
__negvdi2 (DWtype a)
{
- DWtype w;
-
- w = -a;
+ const DWtype w = -a;
if (a >= 0 ? w > 0 : w < 0)
abort ();
@@ -230,10 +212,8 @@ __mulvdi3 (DWtype u, DWtype v)
{
/* The unchecked multiplication needs 3 Wtype x Wtype multiplications,
but the checked multiplication needs only two. */
- DWunion uu, vv;
-
- uu.ll = u;
- vv.ll = v;
+ const DWunion uu = {.ll = u};
+ const DWunion vv = {.ll = v};
if (__builtin_expect (uu.s.high == uu.s.low >> (WORD_SIZE - 1), 1))
{
@@ -247,10 +227,11 @@ __mulvdi3 (DWtype u, DWtype v)
else
{
/* Two multiplications. */
- DWunion w0, w1;
+ DWunion w0 = {.ll = (UDWtype) (UWtype) uu.s.low
+ * (UDWtype) (UWtype) vv.s.low};
+ DWunion w1 = {.ll = (UDWtype) (UWtype) uu.s.low
+ * (UDWtype) (UWtype) vv.s.high};
- w0.ll = (UDWtype) (UWtype) uu.s.low * (UDWtype) (UWtype) vv.s.low;
- w1.ll = (UDWtype) (UWtype) uu.s.low * (UDWtype) (UWtype) vv.s.high;
if (vv.s.high < 0)
w1.s.high -= uu.s.low;
if (uu.s.low < 0)
@@ -269,10 +250,11 @@ __mulvdi3 (DWtype u, DWtype v)
{
/* v fits into a single Wtype. */
/* Two multiplications. */
- DWunion w0, w1;
+ DWunion w0 = {.ll = (UDWtype) (UWtype) uu.s.low
+ * (UDWtype) (UWtype) vv.s.low};
+ DWunion w1 = {.ll = (UDWtype) (UWtype) uu.s.high
+ * (UDWtype) (UWtype) vv.s.low};
- w0.ll = (UDWtype) (UWtype) uu.s.low * (UDWtype) (UWtype) vv.s.low;
- w1.ll = (UDWtype) (UWtype) uu.s.high * (UDWtype) (UWtype) vv.s.low;
if (uu.s.high < 0)
w1.s.high -= vv.s.low;
if (vv.s.low < 0)
@@ -293,10 +275,8 @@ __mulvdi3 (DWtype u, DWtype v)
{
if (uu.s.high == 0 && vv.s.high == 0)
{
- DWtype w;
-
- w = (UDWtype) (UWtype) uu.s.low
- * (UDWtype) (UWtype) vv.s.low;
+ const DWtype w = (UDWtype) (UWtype) uu.s.low
+ * (UDWtype) (UWtype) vv.s.low;
if (__builtin_expect (w >= 0, 1))
return w;
}
@@ -305,10 +285,9 @@ __mulvdi3 (DWtype u, DWtype v)
{
if (uu.s.high == 0 && vv.s.high == (Wtype) -1)
{
- DWunion ww;
+ DWunion ww = {.ll = (UDWtype) (UWtype) uu.s.low
+ * (UDWtype) (UWtype) vv.s.low};
- ww.ll = (UDWtype) (UWtype) uu.s.low
- * (UDWtype) (UWtype) vv.s.low;
ww.s.high -= uu.s.low;
if (__builtin_expect (ww.s.high < 0, 1))
return ww.ll;
@@ -321,10 +300,9 @@ __mulvdi3 (DWtype u, DWtype v)
{
if (uu.s.high == (Wtype) -1 && vv.s.high == 0)
{
- DWunion ww;
+ DWunion ww = {.ll = (UDWtype) (UWtype) uu.s.low
+ * (UDWtype) (UWtype) vv.s.low};
- ww.ll = (UDWtype) (UWtype) uu.s.low
- * (UDWtype) (UWtype) vv.s.low;
ww.s.high -= vv.s.low;
if (__builtin_expect (ww.s.high < 0, 1))
return ww.ll;
@@ -334,10 +312,9 @@ __mulvdi3 (DWtype u, DWtype v)
{
if (uu.s.high == (Wtype) -1 && vv.s.high == (Wtype) - 1)
{
- DWunion ww;
+ DWunion ww = {.ll = (UDWtype) (UWtype) uu.s.low
+ * (UDWtype) (UWtype) vv.s.low};
- ww.ll = (UDWtype) (UWtype) uu.s.low
- * (UDWtype) (UWtype) vv.s.low;
ww.s.high -= uu.s.low;
ww.s.high -= vv.s.low;
if (__builtin_expect (ww.s.high >= 0, 1))
@@ -360,16 +337,13 @@ __mulvdi3 (DWtype u, DWtype v)
DWtype
__lshrdi3 (DWtype u, word_type b)
{
- DWunion w;
- word_type bm;
- DWunion uu;
-
if (b == 0)
return u;
- uu.ll = u;
+ const DWunion uu = {.ll = u};
+ const word_type bm = (sizeof (Wtype) * BITS_PER_UNIT) - b;
+ DWunion w;
- bm = (sizeof (Wtype) * BITS_PER_UNIT) - b;
if (bm <= 0)
{
w.s.high = 0;
@@ -377,7 +351,7 @@ __lshrdi3 (DWtype u, word_type b)
}
else
{
- UWtype carries = (UWtype) uu.s.high << bm;
+ const UWtype carries = (UWtype) uu.s.high << bm;
w.s.high = (UWtype) uu.s.high >> b;
w.s.low = ((UWtype) uu.s.low >> b) | carries;
@@ -391,16 +365,13 @@ __lshrdi3 (DWtype u, word_type b)
DWtype
__ashldi3 (DWtype u, word_type b)
{
- DWunion w;
- word_type bm;
- DWunion uu;
-
if (b == 0)
return u;
- uu.ll = u;
+ const DWunion uu = {.ll = u};
+ const word_type bm = (sizeof (Wtype) * BITS_PER_UNIT) - b;
+ DWunion w;
- bm = (sizeof (Wtype) * BITS_PER_UNIT) - b;
if (bm <= 0)
{
w.s.low = 0;
@@ -408,7 +379,7 @@ __ashldi3 (DWtype u, word_type b)
}
else
{
- UWtype carries = (UWtype) uu.s.low >> bm;
+ const UWtype carries = (UWtype) uu.s.low >> bm;
w.s.low = (UWtype) uu.s.low << b;
w.s.high = ((UWtype) uu.s.high << b) | carries;
@@ -422,16 +393,13 @@ __ashldi3 (DWtype u, word_type b)
DWtype
__ashrdi3 (DWtype u, word_type b)
{
- DWunion w;
- word_type bm;
- DWunion uu;
-
if (b == 0)
return u;
- uu.ll = u;
+ const DWunion uu = {.ll = u};
+ const word_type bm = (sizeof (Wtype) * BITS_PER_UNIT) - b;
+ DWunion w;
- bm = (sizeof (Wtype) * BITS_PER_UNIT) - b;
if (bm <= 0)
{
/* w.s.high = 1..1 or 0..0 */
@@ -440,7 +408,7 @@ __ashrdi3 (DWtype u, word_type b)
}
else
{
- UWtype carries = (UWtype) uu.s.high << bm;
+ const UWtype carries = (UWtype) uu.s.high << bm;
w.s.high = uu.s.high >> b;
w.s.low = ((UWtype) uu.s.low >> b) | carries;
@@ -472,10 +440,9 @@ extern int __ffsDI2 (DWtype u);
int
__ffsDI2 (DWtype u)
{
- DWunion uu;
+ const DWunion uu = {.ll = u};
UWtype word, count, add;
- uu.ll = u;
if (uu.s.low != 0)
word = uu.s.low, add = 0;
else if (uu.s.high != 0)
@@ -492,13 +459,10 @@ __ffsDI2 (DWtype u)
DWtype
__muldi3 (DWtype u, DWtype v)
{
- DWunion w;
- DWunion uu, vv;
+ const DWunion uu = {.ll = u};
+ const DWunion vv = {.ll = v};
+ DWunion w = {.ll = __umulsidi3 (uu.s.low, vv.s.low)};
- uu.ll = u,
- vv.ll = v;
-
- w.ll = __umulsidi3 (uu.s.low, vv.s.low);
w.s.high += ((UWtype) uu.s.low * (UWtype) vv.s.high
+ (UWtype) uu.s.high * (UWtype) vv.s.low);
@@ -667,11 +631,10 @@ extern int __clzDI2 (UDWtype x);
int
__clzDI2 (UDWtype x)
{
- DWunion uu;
+ const DWunion uu = {.ll = x};
UWtype word;
Wtype ret, add;
- uu.ll = x;
if (uu.s.high)
word = uu.s.high, add = 0;
else
@@ -702,11 +665,10 @@ extern int __ctzDI2 (UDWtype x);
int
__ctzDI2 (UDWtype x)
{
- DWunion uu;
+ const DWunion uu = {.ll = x};
UWtype word;
Wtype ret, add;
- uu.ll = x;
if (uu.s.low)
word = uu.s.low, add = 0;
else
@@ -794,11 +756,8 @@ extern int __parityDI2 (UDWtype x);
int
__parityDI2 (UDWtype x)
{
- DWunion uu;
- UWtype nx;
-
- uu.ll = x;
- nx = uu.s.low ^ uu.s.high;
+ const DWunion uu = {.ll = x};
+ UWtype nx = uu.s.low ^ uu.s.high;
#if W_TYPE_SIZE > 64
# error "fill out the table"
@@ -825,16 +784,13 @@ static inline __attribute__ ((__always_inline__))
UDWtype
__udivmoddi4 (UDWtype n, UDWtype d, UDWtype *rp)
{
- DWunion ww;
- DWunion nn, dd;
+ const DWunion nn = {.ll = n};
+ const DWunion dd = {.ll = d};
DWunion rr;
UWtype d0, d1, n0, n1, n2;
UWtype q0, q1;
UWtype b, bm;
- nn.ll = n;
- dd.ll = d;
-
d0 = dd.s.low;
d1 = dd.s.high;
n0 = nn.s.low;
@@ -1034,8 +990,7 @@ __udivmoddi4 (UDWtype n, UDWtype d, UDWtype *rp)
}
}
- ww.s.low = q0;
- ww.s.high = q1;
+ const DWunion ww = {{.low = q0, .high = q1}};
return ww.ll;
}
#endif
@@ -1045,12 +1000,10 @@ DWtype
__divdi3 (DWtype u, DWtype v)
{
word_type c = 0;
- DWunion uu, vv;
+ DWunion uu = {.ll = u};
+ DWunion vv = {.ll = v};
DWtype w;
- uu.ll = u;
- vv.ll = v;
-
if (uu.s.high < 0)
c = ~c,
uu.ll = -uu.ll;
@@ -1071,12 +1024,10 @@ DWtype
__moddi3 (DWtype u, DWtype v)
{
word_type c = 0;
- DWunion uu, vv;
+ DWunion uu = {.ll = u};
+ DWunion vv = {.ll = v};
DWtype w;
- uu.ll = u;
- vv.ll = v;
-
if (uu.s.high < 0)
c = ~c,
uu.ll = -uu.ll;
@@ -1115,9 +1066,8 @@ __udivdi3 (UDWtype n, UDWtype d)
word_type
__cmpdi2 (DWtype a, DWtype b)
{
- DWunion au, bu;
-
- au.ll = a, bu.ll = b;
+ const DWunion au = {.ll = a};
+ const DWunion bu = {.ll = b};
if (au.s.high < bu.s.high)
return 0;
@@ -1135,9 +1085,8 @@ __cmpdi2 (DWtype a, DWtype b)
word_type
__ucmpdi2 (DWtype a, DWtype b)
{
- DWunion au, bu;
-
- au.ll = a, bu.ll = b;
+ const DWunion au = {.ll = a};
+ const DWunion bu = {.ll = b};
if ((UWtype) au.s.high < (UWtype) bu.s.high)
return 0;
@@ -1158,17 +1107,14 @@ __ucmpdi2 (DWtype a, DWtype b)
DWtype
__fixunstfDI (TFtype a)
{
- TFtype b;
- UDWtype v;
-
if (a < 0)
return 0;
/* Compute high word of result, as a flonum. */
- b = (a / HIGH_WORD_COEFF);
+ const TFtype b = (a / HIGH_WORD_COEFF);
/* Convert that to fixed (but not to DWtype!),
and shift it into the high word. */
- v = (UWtype) b;
+ UDWtype v = (UWtype) b;
v <<= WORD_SIZE;
/* Remove high part from the TFtype, leaving the low part as flonum. */
a -= (TFtype)v;
@@ -1200,17 +1146,14 @@ __fixtfdi (TFtype a)
DWtype
__fixunsxfDI (XFtype a)
{
- XFtype b;
- UDWtype v;
-
if (a < 0)
return 0;
/* Compute high word of result, as a flonum. */
- b = (a / HIGH_WORD_COEFF);
+ const XFtype b = (a / HIGH_WORD_COEFF);
/* Convert that to fixed (but not to DWtype!),
and shift it into the high word. */
- v = (UWtype) b;
+ UDWtype v = (UWtype) b;
v <<= WORD_SIZE;
/* Remove high part from the XFtype, leaving the low part as flonum. */
a -= (XFtype)v;
@@ -1242,17 +1185,15 @@ __fixxfdi (XFtype a)
DWtype
__fixunsdfDI (DFtype a)
{
- UWtype hi, lo;
-
/* Get high part of result. The division here will just moves the radix
point and will not cause any rounding. Then the conversion to integral
type chops result as desired. */
- hi = a / HIGH_WORD_COEFF;
+ const UWtype hi = a / HIGH_WORD_COEFF;
/* Get low part of result. Convert `hi' to floating type and scale it back,
then subtract this from the number being converted. This leaves the low
part. Convert that to integral type. */
- lo = (a - ((DFtype) hi) * HIGH_WORD_COEFF);
+ const UWtype lo = (a - ((DFtype) hi) * HIGH_WORD_COEFF);
/* Assemble result from the two parts. */
return ((UDWtype) hi << WORD_SIZE) | lo;
@@ -1279,18 +1220,17 @@ __fixunssfDI (SFtype original_a)
/* Convert the SFtype to a DFtype, because that is surely not going
to lose any bits. Some day someone else can write a faster version
that avoids converting to DFtype, and verify it really works right. */
- DFtype a = original_a;
- UWtype hi, lo;
+ const DFtype a = original_a;
/* Get high part of result. The division here will just moves the radix
point and will not cause any rounding. Then the conversion to integral
type chops result as desired. */
- hi = a / HIGH_WORD_COEFF;
+ const UWtype hi = a / HIGH_WORD_COEFF;
/* Get low part of result. Convert `hi' to floating type and scale it back,
then subtract this from the number being converted. This leaves the low
part. Convert that to integral type. */
- lo = (a - ((DFtype) hi) * HIGH_WORD_COEFF);
+ const UWtype lo = (a - ((DFtype) hi) * HIGH_WORD_COEFF);
/* Assemble result from the two parts. */
return ((UDWtype) hi << WORD_SIZE) | lo;
@@ -1315,9 +1255,7 @@ __fixsfdi (SFtype a)
XFtype
__floatdixf (DWtype u)
{
- XFtype d;
-
- d = (Wtype) (u >> WORD_SIZE);
+ XFtype d = (Wtype) (u >> WORD_SIZE);
d *= HIGH_HALFWORD_COEFF;
d *= HIGH_HALFWORD_COEFF;
d += (UWtype) (u & (HIGH_WORD_COEFF - 1));
@@ -1334,9 +1272,7 @@ __floatdixf (DWtype u)
TFtype
__floatditf (DWtype u)
{
- TFtype d;
-
- d = (Wtype) (u >> WORD_SIZE);
+ TFtype d = (Wtype) (u >> WORD_SIZE);
d *= HIGH_HALFWORD_COEFF;
d *= HIGH_HALFWORD_COEFF;
d += (UWtype) (u & (HIGH_WORD_COEFF - 1));
@@ -1353,9 +1289,7 @@ __floatditf (DWtype u)
DFtype
__floatdidf (DWtype u)
{
- DFtype d;
-
- d = (Wtype) (u >> WORD_SIZE);
+ DFtype d = (Wtype) (u >> WORD_SIZE);
d *= HIGH_HALFWORD_COEFF;
d *= HIGH_HALFWORD_COEFF;
d += (UWtype) (u & (HIGH_WORD_COEFF - 1));
@@ -1376,11 +1310,6 @@ __floatdidf (DWtype u)
SFtype
__floatdisf (DWtype u)
{
- /* Do the calculation in DFmode
- so that we don't lose any of the precision of the high word
- while multiplying it. */
- DFtype f;
-
/* Protect against double-rounding error.
Represent any low-order bits, that might be truncated in DFmode,
by a bit that won't be lost. The bit can go in anywhere below the
@@ -1401,7 +1330,10 @@ __floatdisf (DWtype u)
}
}
}
- f = (Wtype) (u >> WORD_SIZE);
+ /* Do the calculation in DFmode
+ so that we don't lose any of the precision of the high word
+ while multiplying it. */
+ DFtype f = (Wtype) (u >> WORD_SIZE);
f *= HIGH_HALFWORD_COEFF;
f *= HIGH_HALFWORD_COEFF;
f += (UWtype) (u & (HIGH_WORD_COEFF - 1));
@@ -1510,7 +1442,7 @@ __gcc_bcmp (const unsigned char *s1, const unsigned char *s2, size_t size)
{
while (size > 0)
{
- unsigned char c1 = *s1++, c2 = *s2++;
+ const unsigned char c1 = *s1++, c2 = *s2++;
if (c1 != c2)
return c1 - c2;
size--;
@@ -1690,8 +1622,9 @@ __do_global_ctors (void)
For systems which support a .init section we use the .init section
to run __do_global_ctors, so we need not do anything here. */
+extern void SYMBOL__MAIN (void);
void
-SYMBOL__MAIN ()
+SYMBOL__MAIN (void)
{
/* Support recursive calls to `main': run initializers just once. */
static int initialized;
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-07 06:35:38 +0000