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tcg-hppa: Load GUEST_BASE as an immediate. 

Now that the prologue is generated after GUEST_BASE is fixed,
we can load it as an immediate, and also avoid reserving the
register if it isn't necessary.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Richard Henderson 2010-05-06 08:50:42 -07:00 committed by Aurelien Jarno
parent 9002ec794e
commit 4b31713dc4
1 changed files with 4 additions and 8 deletions
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12
tcg/hppa/tcg-target.c
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@ -1629,11 +1629,10 @@ void tcg_target_qemu_prologue(TCGContext *s)
} }
#ifdef CONFIG_USE_GUEST_BASE #ifdef CONFIG_USE_GUEST_BASE
/* Note that GUEST_BASE can change after the prologue is generated. if (GUEST_BASE != 0) {
To combat that, load the value from the variable instead of tcg_out_movi(s, TCG_TYPE_PTR, TCG_GUEST_BASE_REG, GUEST_BASE);
embedding a constant here. */ tcg_regset_set_reg(s->reserved_regs, TCG_GUEST_BASE_REG);
tcg_out_ld(s, TCG_TYPE_PTR, TCG_GUEST_BASE_REG, }
TCG_REG_R0, (tcg_target_long)&guest_base);
#endif #endif
/* Jump to TB, and adjust R18 to be the return address. */ /* Jump to TB, and adjust R18 to be the return address. */
@ -1679,9 +1678,6 @@ void tcg_target_init(TCGContext *s)
tcg_regset_set_reg(s->reserved_regs, TCG_REG_DP); /* data pointer */ tcg_regset_set_reg(s->reserved_regs, TCG_REG_DP); /* data pointer */
tcg_regset_set_reg(s->reserved_regs, TCG_REG_SP); /* stack pointer */ tcg_regset_set_reg(s->reserved_regs, TCG_REG_SP); /* stack pointer */
tcg_regset_set_reg(s->reserved_regs, TCG_REG_R31); /* ble link reg */ tcg_regset_set_reg(s->reserved_regs, TCG_REG_R31); /* ble link reg */
#ifdef CONFIG_USE_GUEST_BASE
tcg_regset_set_reg(s->reserved_regs, TCG_GUEST_BASE_REG);
#endif
tcg_add_target_add_op_defs(hppa_op_defs); tcg_add_target_add_op_defs(hppa_op_defs);
} }