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ppc: Add initial jit_va_ calls to ppc

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* lib/jit_ppc-cpu.c, lib/jit_ppc-fpu.c, lib/jit_ppc.c:
	Add base support to jit vararg functions to the PowerPC backend.
This commit is contained in:
pcpa 2015-05-05 20:55:05 -03:00
parent 2c8b5e530c
commit cc217f0608
4 changed files with 108 additions and 0 deletions
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55
lib/jit_ppc-cpu.c
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@ -854,6 +854,10 @@ static jit_word_t _calli_p(jit_state_t*,jit_word_t);
static void _prolog(jit_state_t*, jit_node_t*);
# define epilog(node) _epilog(_jit, node)
static void _epilog(jit_state_t*, jit_node_t*);
# define vastart(r0) _vastart(_jit, r0)
static void _vastart(jit_state_t*, jit_int32_t);
# define vaarg(r0, r1) _vaarg(_jit, r0, r1)
static void _vaarg(jit_state_t*, jit_int32_t, jit_int32_t);
# define patch_at(i,l) _patch_at(_jit,i,l)
static void _patch_at(jit_state_t*,jit_word_t,jit_word_t);
#endif
@ -3280,6 +3284,12 @@ _prolog(jit_state_t *_jit, jit_node_t *node)
stxi_i(_jitc->function->aoffoff, _FP_REGNO, rn(regno));
jit_unget_reg(regno);
}
if (_jitc->function->self.call & jit_call_varargs) {
for (regno = _jitc->function->vagp; jit_arg_reg_p(regno); ++regno)
stxi(gpr_save_area - (8 - regno) * sizeof(jit_word_t),
_FP_REGNO, rn(JIT_RA0 - regno));
}
}
static void
@ -3329,6 +3339,51 @@ _epilog(jit_state_t *_jit, jit_node_t *node)
BLR();
}
static void
_vastart(jit_state_t *_jit, jit_int32_t r0)
{
jit_int32_t reg;
assert(_jitc->function->self.call & jit_call_varargs);
/* Return jit_va_list_t in the register argument */
addi(r0, _FP_REGNO, _jitc->function->vaoff);
reg = jit_get_reg(jit_class_gpr);
/* Initialize stack pointer to the first stack argument.
* The -16 is to account for the 4 argument registers
* always saved, and _jitc->function->vagp is to account
* for declared arguments. */
addi(rn(reg), _FP_REGNO, gpr_save_area -
8 * sizeof(jit_word_t) + _jitc->function->vagp * sizeof(jit_word_t));
stxi(offsetof(jit_va_list_t, stack), r0, rn(reg));
jit_unget_reg(reg);
}
static void
_vaarg(jit_state_t *_jit, jit_int32_t r0, jit_int32_t r1)
{
jit_int32_t inv, reg;
assert(_jitc->function->self.call & jit_call_varargs);
reg = jit_get_reg(jit_class_gpr);
if ((inv = reg == _R0)) reg = jit_get_reg(jit_class_gpr);
/* Load varargs stack pointer. */
ldxi(rn(reg), r1, offsetof(jit_va_list_t, stack));
/* Load argument. */
ldr(r0, rn(reg));
/* Update vararg stack pointer. */
addi(rn(reg), rn(reg), sizeof(jit_word_t));
stxi(offsetof(jit_va_list_t, stack), r1, rn(reg));
jit_unget_reg(reg);
if (inv) jit_unget_reg(_R0);
}
static void
_patch_at(jit_state_t *_jit, jit_word_t instr, jit_word_t label)
{