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Added code generation for first batch of FPU instructions; instructions added are most common instructions used in Quake.

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This commit is contained in:
TomW 2015-04-19 08:42:04 +01:00
commit 15bca849c8
11 changed files with 1179 additions and 48 deletions
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9
src/x87_ops.h
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@ -32,13 +32,13 @@
static inline void x87_set_mmx()
{
TOP = 0;
tag = 0;
*(uint64_t *)tag = 0;
ismmx = 1;
}
static inline void x87_emms()
{
tag = 0xffff;
*tag = 0x0303030303030303ll;
ismmx = 0;
}
@ -50,14 +50,13 @@ static inline void x87_push(double i)
{
TOP=(TOP-1)&7;
ST[TOP]=i;
tag&=~(3<<((TOP&7)<<1));
if (i==0.0) tag|=(1<<((TOP&7)<<1));
tag[TOP&7] = (i == 0.0) ? 1 : 0;
}
static inline double x87_pop()
{
double t=ST[TOP];
tag|=(3<<((TOP&7)<<1));
tag[TOP&7] = 3;
TOP=(TOP+1)&7;
return t;
}