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tcg-ppc: Conditionally reserve TCG_GUEST_BASE_REG.

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We need not reserve the register unless we're going to use it.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: malc <av1474@comtv.ru>
This commit is contained in:
Richard Henderson 2010-05-06 05:50:45 +00:00 committed by malc
parent 408392b30d
commit b9e946c781
2 changed files with 8 additions and 9 deletions
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8
tcg/ppc/tcg-target.c
View File

@ -933,7 +933,10 @@ static void tcg_target_qemu_prologue (TCGContext *s)
tcg_out32 (s, STW | RS (0) | RA (1) | (frame_size + LR_OFFSET));
#ifdef CONFIG_USE_GUEST_BASE
tcg_out_movi (s, TCG_TYPE_I32, TCG_GUEST_BASE_REG, GUEST_BASE);
if (GUEST_BASE) {
tcg_out_movi (s, TCG_TYPE_I32, TCG_GUEST_BASE_REG, GUEST_BASE);
tcg_regset_set_reg(s->reserved_regs, TCG_GUEST_BASE_REG);
}
#endif
tcg_out32 (s, MTSPR | RS (3) | CTR);
@ -1914,9 +1917,6 @@ static void tcg_target_init(TCGContext *s)
#ifdef _CALL_SYSV
tcg_regset_set_reg(s->reserved_regs, TCG_REG_R13);
#endif
#ifdef CONFIG_USE_GUEST_BASE
tcg_regset_set_reg(s->reserved_regs, TCG_GUEST_BASE_REG);
#endif
tcg_add_target_add_op_defs(ppc_op_defs);
}

9
tcg/ppc64/tcg-target.c
View File

@ -899,7 +899,10 @@ static void tcg_target_qemu_prologue (TCGContext *s)
tcg_out32 (s, STD | RS (0) | RA (1) | (frame_size + 16));
#ifdef CONFIG_USE_GUEST_BASE
tcg_out_movi (s, TCG_TYPE_I64, TCG_GUEST_BASE_REG, GUEST_BASE);
if (GUEST_BASE) {
tcg_out_movi (s, TCG_TYPE_I64, TCG_GUEST_BASE_REG, GUEST_BASE);
tcg_regset_set_reg(s->reserved_regs, TCG_GUEST_BASE_REG);
}
#endif
tcg_out32 (s, MTSPR | RS (3) | CTR);
@ -1692,9 +1695,5 @@ static void tcg_target_init (TCGContext *s)
#endif
tcg_regset_set_reg (s->reserved_regs, TCG_REG_R13);
#ifdef CONFIG_USE_GUEST_BASE
tcg_regset_set_reg(s->reserved_regs, TCG_GUEST_BASE_REG);
#endif
tcg_add_target_add_op_defs (ppc_op_defs);
}