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draw: michal's patch for calling powf... teapot still not quite right

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This commit is contained in:
Keith Whitwell 2008-05-29 13:26:01 +01:00
parent a233f65f9b
commit 8f887b4252
2 changed files with 47 additions and 0 deletions
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46
src/gallium/auxiliary/draw/draw_vs_aos.c
View file

@ -1372,11 +1372,20 @@ static boolean emit_MAD( struct aos_compilation *cp, const struct tgsi_full_inst
return TRUE;
}
/* A wrapper for powf().
* Makes sure it is cdecl and operates on floats.
*/
static float PIPE_CDECL _powerf( float x, float y )
{
return powf( x, y );
}
/* Really not sufficient -- need to check for conditions that could
* generate inf/nan values, which will slow things down hugely.
*/
static boolean emit_POW( struct aos_compilation *cp, const struct tgsi_full_instruction *op )
{
#if 0
x87_fld_src(cp, &op->FullSrcRegisters[1], 0); /* a1.x */
x87_fld_src(cp, &op->FullSrcRegisters[0], 0); /* a0.x a1.x */
x87_fyl2x(cp->func); /* a1*log2(a0) */
@ -1384,6 +1393,42 @@ static boolean emit_POW( struct aos_compilation *cp, const struct tgsi_full_inst
x87_emit_ex2( cp ); /* 2^(a1*log2(a0)) */
x87_fstp_dest4(cp, &op->FullDstRegisters[0]);
#else
uint i;
/* For absolute correctness, need to spill/invalidate all XMM regs
* too.
*/
for (i = 0; i < 8; i++) {
if (cp->xmm[i].dirty)
spill(cp, i);
aos_release_xmm_reg(cp, i);
}
/* Push caller-save (ie scratch) regs.
*/
x86_cdecl_caller_push_regs( cp->func );
x86_lea( cp->func, cp->stack_ESP, x86_make_disp(cp->stack_ESP, -8) );
x87_fld_src( cp, &op->FullSrcRegisters[1], 0 );
x87_fstp( cp->func, x86_make_disp( cp->stack_ESP, 4 ) );
x87_fld_src( cp, &op->FullSrcRegisters[0], 0 );
x87_fstp( cp->func, x86_make_disp( cp->stack_ESP, 0 ) );
x86_mov_reg_imm( cp->func, cp->tmp_EAX, (unsigned long) _powerf );
x86_call( cp->func, cp->tmp_EAX );
x86_lea( cp->func, cp->stack_ESP, x86_make_disp(cp->stack_ESP, 8) );
x86_cdecl_caller_pop_regs( cp->func );
/* Note retval on x87 stack:
*/
cp->func->x87_stack++;
x87_fstp_dest4( cp, &op->FullDstRegisters[0] );
#endif
return TRUE;
}
@ -1781,6 +1826,7 @@ static boolean build_vertex_program( struct draw_vs_varient_aos_sse *varient,
cp.machine_EDX = x86_make_reg(file_REG32, reg_DX);
cp.count_ESI = x86_make_reg(file_REG32, reg_SI);
cp.temp_EBP = x86_make_reg(file_REG32, reg_BP);
cp.stack_ESP = x86_make_reg( file_REG32, reg_SP );
x86_init_func(cp.func);

1
src/gallium/auxiliary/draw/draw_vs_aos.h
View file

@ -160,6 +160,7 @@ struct aos_compilation {
struct x86_reg machine_EDX;
struct x86_reg count_ESI; /* decrements to zero */
struct x86_reg temp_EBP;
struct x86_reg stack_ESP;
};
struct x86_reg aos_get_xmm_reg( struct aos_compilation *cp );