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cell: checkpoint: more work in emit_function_call()

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Simple function call works now, but we don't save/restore the caller's registers yet.
This commit is contained in:
Brian Paul 2008-09-26 17:59:19 -06:00
parent 55b65d3b42
commit fe1c9872ae
1 changed files with 39 additions and 6 deletions
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45
src/gallium/drivers/cell/ppu/cell_gen_fp.c
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@ -1105,7 +1105,10 @@ emit_function_call(struct codegen *gen,
uint addr;
int ch;
assert(num_args <= 2);
/* XXX temporary value */
const int frameSize = 64; /* stack frame (activation record) size */
assert(num_args <= 3);
/* lookup function address */
{
@ -1119,7 +1122,9 @@ emit_function_call(struct codegen *gen,
assert(addr && "spu function not found");
}
sprintf(comment, "CALL %s:", funcname);
addr /= 4; /* discard 2 least significant bits */
snprintf(comment, sizeof(comment), "CALL %s:", funcname);
spe_comment(gen->f, -4, comment);
for (ch = 0; ch < 4; ch++) {
@ -1131,12 +1136,40 @@ emit_function_call(struct codegen *gen,
s_regs[a] = get_src_reg(gen, ch, &inst->FullSrcRegisters[a]);
}
/* XXX not done */
(void) s_regs;
(void) d_reg;
/* Basically:
* save registers on stack
* move parameters to registers 3, 4, 5...
* call function
* save return value (reg 3)
* restore registers from stack
*/
spe_bisl(gen->f, SPE_REG_RA, addr, 0, 0); /* XXX untested! */
/* XXX hack: load first function param */
spe_move(gen->f, 3, s_regs[0]);
/* save $lr on stack # stqd $lr,16($sp) */
spe_stqd(gen->f, SPE_REG_RA, SPE_REG_SP, 16);
/* save stack pointer # stqd $sp,-frameSize($sp) */
spe_stqd(gen->f, SPE_REG_SP, SPE_REG_SP, -frameSize);
/* XXX save registers to stack here */
/* adjust stack pointer # ai $sp,$sp,-frameSize */
spe_ai(gen->f, SPE_REG_SP, SPE_REG_SP, -frameSize);
/* branch to function, save return addr */
spe_brasl(gen->f, SPE_REG_RA, addr);
/* restore stack pointer # ai $sp,$sp,frameSize */
spe_ai(gen->f, SPE_REG_SP, SPE_REG_SP, frameSize);
/* XXX restore registers from stack here */
/* restore $lr # lqd $lr,16($sp) */
spe_lqd(gen->f, SPE_REG_RA, SPE_REG_SP, 16);
/* XXX hack: save function's return value */
spe_move(gen->f, d_reg, 3);
store_dest_reg(gen, d_reg, ch, &inst->FullDstRegisters[0]);
free_itemps(gen);