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fine-tuning x86 gcc codegen

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This commit is contained in:
Daniel Borca 2004-03-31 08:31:41 +00:00
parent b48c575983
commit 13822537a7
2 changed files with 35 additions and 20 deletions
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27
src/mesa/tnl/t_vtx_x86.c
View file

@ -109,6 +109,25 @@ do { \
#define FIXUPREL( CODE, KNOWN_OFFSET, CHECKVAL, NEWVAL )\
do { \
GLuint subst = 0x10101010 + CHECKVAL; \
\
if (DONT_KNOW_OFFSETS) { \
while (*(int *)(CODE+offset) != subst) offset++; \
*(int *)(CODE+offset) = (int)(NEWVAL) - ((int)(CODE)+offset) - 4; \
if (0) fprintf(stderr, "%s/%d: offset %d, new value: 0x%x\n", __FILE__, __LINE__, offset, (int)(NEWVAL) - ((int)(CODE)+offset) - 4); \
offset += 4; \
} \
else { \
int *icode = (int *)(CODE+KNOWN_OFFSET); \
assert (*icode == subst); \
*icode = (int)(NEWVAL) - (int)(icode) - 4; \
} \
} while (0)
/* Build specialized versions of the immediate calls on the fly for
* the current state. Generic x86 versions.
@ -125,7 +144,7 @@ static struct _tnl_dynfn *makeX86Vertex1fv( GLcontext *ctx, int vertex_size )
FIXUP(dfn->code, 0, 0, (int)&tnl->vtx.vbptr);
FIXUP(dfn->code, 0, 3, (int)&tnl->vtx.counter);
FIXUP(dfn->code, 0, 3, (int)&tnl->vtx.counter);
FIXUP(dfn->code, 0, 4, (int)&notify);
FIXUPREL(dfn->code, 0, 4, (int)&notify);
return dfn;
}
@ -141,7 +160,7 @@ static struct _tnl_dynfn *makeX86Vertex2fv( GLcontext *ctx, int vertex_size )
FIXUP(dfn->code, 0, 0, (int)&tnl->vtx.vbptr);
FIXUP(dfn->code, 0, 3, (int)&tnl->vtx.counter);
FIXUP(dfn->code, 0, 3, (int)&tnl->vtx.counter);
FIXUP(dfn->code, 0, 4, (int)&notify);
FIXUPREL(dfn->code, 0, 4, (int)&notify);
return dfn;
}
@ -157,7 +176,7 @@ static struct _tnl_dynfn *makeX86Vertex3fv( GLcontext *ctx, int vertex_size )
FIXUP(dfn->code, 0, 0, (int)&tnl->vtx.vbptr);
FIXUP(dfn->code, 0, 3, (int)&tnl->vtx.counter);
FIXUP(dfn->code, 0, 3, (int)&tnl->vtx.counter);
FIXUP(dfn->code, 0, 4, (int)&notify);
FIXUPREL(dfn->code, 0, 4, (int)&notify);
return dfn;
}
@ -172,7 +191,7 @@ static struct _tnl_dynfn *makeX86Vertex4fv( GLcontext *ctx, int vertex_size )
FIXUP(dfn->code, 0, 0, (int)&tnl->vtx.vbptr);
FIXUP(dfn->code, 0, 3, (int)&tnl->vtx.counter);
FIXUP(dfn->code, 0, 3, (int)&tnl->vtx.counter);
FIXUP(dfn->code, 0, 4, (int)&notify);
FIXUPREL(dfn->code, 0, 4, (int)&notify);
return dfn;
}

28
src/mesa/tnl/t_vtx_x86_gcc.S
View file

@ -66,10 +66,9 @@ GLOBL ( _x86_Vertex1fv )
pop %edi
dec %edx // counter--
movl %edx, SUBST(3) // 0x3 --> counter
je .5 // if (counter != 0)
ret // return
.5: mov $SUBST(4), %eax // else notify()
jmp *%eax // jmp $0x10101014 doesn't seem to work
.short 0x840f // if (counter == 0)
.long SUBST(4) // notify()
ret // return
GLOBL ( _x86_Vertex1fv_end )
@ -94,10 +93,9 @@ GLOBL ( _x86_Vertex2fv )
pop %edi
dec %edx // counter--
movl %edx, SUBST(3) // save counter
je .6 // if (counter != 0)
ret // return
.6: mov $SUBST(4), %eax // else notify()
jmp *%eax // jmp $0x10101014 doesn't seem to work
.short 0x840f // if (counter == 0)
.long SUBST(4) // notify()
ret // return
GLOBL ( _x86_Vertex2fv_end )
.align 4
@ -123,10 +121,9 @@ GLOBL ( _x86_Vertex3fv )
pop %edi
dec %edx // counter--
movl %edx, SUBST(3) // save counter
je .7 // if (counter != 0)
ret // return
.7: mov $SUBST(4), %eax // else notify()
jmp *%eax // jmp $0x10101014 doesn't seem to work
.short 0x840f // if (counter == 0)
.long SUBST(4) // notify()
ret // return
GLOBL ( _x86_Vertex3fv_end )
@ -155,10 +152,9 @@ GLOBL ( _x86_Vertex4fv )
pop %edi
dec %edx // counter--
movl %edx, SUBST(3) // save counter
je .6 // if (counter != 0)
ret // return
.8: mov $SUBST(4), %eax // else notify()
jmp *%eax // jmp $0x10101014 doesn't seem to work
.short 0x840f // if (counter == 0)
.long SUBST(4) // notify()
ret // return
GLOBL ( _x86_Vertex4fv_end )