lightning.git - Portable just-in-time compiler library

diff --git a/lib/jit_ppc-cpu.c b/lib/jit_ppc-cpu.c
index 4cfa561..729d275 100644
--- a/lib/jit_ppc-cpu.c
+++ b/lib/jit_ppc-cpu.c

@@ -16,10 +16,7 @@

*/

#if PROTO

-/* quite a lot of space for fixed computation of possible stack arguments

- * this currently is done mostly to keep it simple, as the vm has only

- * one function */

-# define stack_framesize 224

+# define stack_framesize 80

# define ii(i) *_jit->pc.ui++ = i

# define can_sign_extend_short_p(im) ((im) >= -32768 && (im) <= 32767)

# define can_zero_extend_short_p(im) ((im) >= 0 && (im) <= 65535)

@@ -2209,46 +2206,37 @@ _calli_p(jit_state_t *_jit, jit_word_t i0)

static void

_prolog(jit_state_t *_jit, jit_node_t *node)

{

- unsigned long regno;

+ unsigned long regno;

- subi(_SP_REGNO, _SP_REGNO, stack_framesize);

/* return address */

MFLR(_R0_REGNO);

- stxi(0, _SP_REGNO, _R0_REGNO);

- /* save any clobbered callee save fpr register */

- /* FIXME actually, no "clean" interface to use these registers */

- for (regno = _F31; regno >= _F14; regno--) {

- if (jit_regset_tstbit(_jit->function->regset, regno))

- stxi_d(stack_framesize - rn(regno) * 8, _SP_REGNO, regno);

- }

/* save any clobbered callee save gpr register */

regno = jit_regset_scan1(_jit->function->regset, _R14);

if (regno == ULONG_MAX || regno > _R31)

regno = _R31; /* aka _FP_REGNO */

- STMW(regno, _SP_REGNO, rn(regno) * 4 + 8);

- movr(_FP_REGNO, _SP_REGNO);

- /* alloca and/or space for excess parameters */

- subi(_SP_REGNO, _SP_REGNO, _jit->function->stack);

+ STMW(rn(regno), _SP_REGNO, -(32 * 4) + rn(regno) * 4);

+

+ stxi(8, _SP_REGNO, _R0_REGNO);

+ STWU(_SP_REGNO, _SP_REGNO, -(stack_framesize + _jit->function->stack + 16));

+ addi(_FP_REGNO, _SP_REGNO, _jit->function->stack + 16);

}

static void

_epilog(jit_state_t *_jit, jit_node_t *node)

{

- unsigned long regno;

+ unsigned long regno;

+

+ //ldxi(_SP_REGNO, _SP_REGNO, 0);

+ LWZ(_SP_REGNO, _SP_REGNO, 0);

+ ldxi(_R0_REGNO, _SP_REGNO, 8);

+

+ MTLR(_R0_REGNO);

- movr(_SP_REGNO, _FP_REGNO);

- for (regno = _F31; regno >= _F14; regno--) {

- if (jit_regset_tstbit(_jit->function->regset, regno))

- ldxi_d(regno, _SP_REGNO, stack_framesize - rn(regno) * 8);

- }

regno = jit_regset_scan1(_jit->function->regset, _R14);

if (regno == ULONG_MAX || regno > _R31)

regno = _R31; /* aka _FP_REGNO */

- LMW(rn(regno), _SP_REGNO, regno * 4 + 8);

- ldxi(_R0_REGNO, _SP_REGNO, 0);

- addi(_SP_REGNO, _SP_REGNO, stack_framesize);

- MTLR(_R0_REGNO);

+ LMW(rn(regno), _SP_REGNO, -(32 * 4) + rn(regno) * 4);

BLR();

}