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asm tweaks

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This commit is contained in:
Mathieu Lacage
2010-08-24 23:10:06 +02:00
parent 6bfe742905
commit f331937ac9
1 changed files with 29 additions and 66 deletions
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95
src/simulator/uint64x64-cairo.h
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@@ -121,47 +121,18 @@ private:
++_v.hi;
}
}
inline int Compare (const uint64x64_t &o) const
{
int status;
uint64x64_t tmp = *this;
tmp -= o;
status = (((int64_t)(tmp)._v.hi) < 0)?-1:
(((tmp)._v.hi == 0 && (tmp)._v.lo == 0))?0:1;
return status;
}
cairo_int128_t _v;
};
#if defined(UINT64x64_CAIRO_ASM)
#define xCMP_ls "jl"
#define xCMP_le "jle"
#define COMPARE(a,b,op) \
({ \
int status; \
asm ("mov 0(%1),%%eax\n\t" \
"add 0(%2),%%eax\n\t" \
"mov 4(%1),%%eax\n\t" \
"adc 4(%2),%%eax\n\t" \
"mov 8(%1),%%eax\n\t" \
"adc 8(%2),%%eax\n\t" \
"mov 12(%1),%%eax\n\t" \
"adc 12(%2),%%eax\n\t" \
x##op " 1f\n\t" \
"mov $0,%0\n\t" \
"ja 2f\n" \
"1:\tmov $1,%0\n\t" \
"2:" \
: "=r" (status) \
: "r" (&a._v), "r" (&b._v) \
: "%eax", "cc"); \
bool retval = status == 1; \
retval; \
})
#else
#define xCMP_ls(a) (((int64_t)(a)._v.hi) < 0)
#define xCMP_le(a) ((((int64_t)(a)._v.hi) < 0) || ((a)._v.hi == 0 && (a)._v.lo == 0))
#define COMPARE(a,b,op) \
({ \
uint64x64_t tmp = a; \
tmp -= b; \
bool result = x##op(tmp); \
result; \
})
#endif
inline bool operator == (const uint64x64_t &lhs, const uint64x64_t &rhs)
{
return lhs._v.hi == rhs._v.hi && lhs._v.lo == lhs._v.lo;
@@ -174,36 +145,32 @@ inline bool operator != (const uint64x64_t &lhs, const uint64x64_t &rhs)
inline bool operator < (const uint64x64_t &lhs, const uint64x64_t &rhs)
{
return COMPARE(lhs,rhs,CMP_ls);
return lhs.Compare (rhs) < 0;
}
inline bool operator <= (const uint64x64_t &lhs, const uint64x64_t &rhs)
{
return COMPARE(lhs,rhs,CMP_le);
return lhs.Compare (rhs) <= 0;
}
inline bool operator >= (const uint64x64_t &lhs, const uint64x64_t &rhs)
{
return !(lhs < rhs);
return lhs.Compare (rhs) >= 0;
}
inline bool operator > (const uint64x64_t &lhs, const uint64x64_t &rhs)
{
return !(lhs <= rhs);
return lhs.Compare (rhs) > 0;
}
inline uint64x64_t &operator += (uint64x64_t &lhs, const uint64x64_t &rhs)
{
#if UINT64x64_CAIRO_ASM
asm ("mov 0(%0),%%eax\n\t"
"add 0(%1),%%eax\n\t"
"mov %%eax,0(%0)\n\t"
"mov 4(%0),%%eax\n\t"
"adc 4(%1),%%eax\n\t"
"mov %%eax,4(%0)\n\t"
"mov 8(%0),%%eax\n\t"
"adc 8(%1),%%eax\n\t"
"mov %%eax,8(%0)\n\t"
"mov 12(%0),%%eax\n\t"
"adc 12(%1),%%eax\n\t"
"mov %%eax,12(%0)\n\t"
asm ("mov 0(%1),%%eax\n\t"
"add %%eax,0(%0)\n\t"
"mov 4(%1),%%eax\n\t"
"adc %%eax,4(%0)\n\t"
"mov 8(%1),%%eax\n\t"
"adc %%eax,8(%0)\n\t"
"mov 12(%1),%%eax\n\t"
"adc %%eax,12(%0)\n\t"
:
: "r" (&lhs._v), "r" (&rhs._v)
: "%eax", "cc");
@@ -220,18 +187,14 @@ inline uint64x64_t &operator += (uint64x64_t &lhs, const uint64x64_t &rhs)
inline uint64x64_t &operator -= (uint64x64_t &lhs, const uint64x64_t &rhs)
{
#if UINT64x64_CAIRO_ASM
asm ("mov 0(%0),%%eax\n\t"
"sub 0(%1),%%eax\n\t"
"mov %%eax,0(%0)\n\t"
"mov 4(%0),%%eax\n\t"
"sbb 4(%1),%%eax\n\t"
"mov %%eax,4(%0)\n\t"
"mov 8(%0),%%eax\n\t"
"sbb 8(%1),%%eax\n\t"
"mov %%eax,8(%0)\n\t"
"mov 12(%0),%%eax\n\t"
"sbb 12(%1),%%eax\n\t"
"mov %%eax,12(%0)\n\t"
asm ("mov 0(%1),%%eax\n\t"
"sub %%eax,0(%0)\n\t"
"mov 4(%1),%%eax\n\t"
"sbb %%eax,4(%0)\n\t"
"mov 8(%1),%%eax\n\t"
"sbb %%eax,8(%0)\n\t"
"mov 12(%1),%%eax\n\t"
"sbb %%eax,12(%0)\n\t"
:
: "r" (&lhs._v), "r" (&rhs._v)
: "%eax", "cc");