softmmu templates: optionally pass CPUState to memory access functions
Optionally, make memory access helpers take a parameter for CPUState
instead of relying on global env.
On most targets, perform simple moves to reorder registers. On i386,
switch from regparm(3) calling convention to standard stack-based
version.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
diff --git a/tcg/sparc/tcg-target.c b/tcg/sparc/tcg-target.c
index b287122..80f0818 100644
--- a/tcg/sparc/tcg-target.c
+++ b/tcg/sparc/tcg-target.c
@@ -59,6 +59,12 @@
};
#endif
+#ifdef CONFIG_TCG_PASS_AREG0
+#define ARG_OFFSET 1
+#else
+#define ARG_OFFSET 0
+#endif
+
static const int tcg_target_reg_alloc_order[] = {
TCG_REG_L0,
TCG_REG_L1,
@@ -86,9 +92,9 @@
static const int tcg_target_call_oarg_regs[] = {
TCG_REG_O0,
-#if TCG_TARGET_REG_BITS == 32
- TCG_REG_O1
-#endif
+ TCG_REG_O1,
+ TCG_REG_O2,
+ TCG_REG_O3,
};
static inline int check_fit_tl(tcg_target_long val, unsigned int bits)
@@ -155,6 +161,9 @@
tcg_regset_reset_reg(ct->u.regs, TCG_REG_O0);
tcg_regset_reset_reg(ct->u.regs, TCG_REG_O1);
tcg_regset_reset_reg(ct->u.regs, TCG_REG_O2);
+#ifdef CONFIG_TCG_PASS_AREG0
+ tcg_regset_reset_reg(ct->u.regs, TCG_REG_O3);
+#endif
break;
case 'I':
ct->ct |= TCG_CT_CONST_S11;
@@ -706,6 +715,27 @@
#include "../../softmmu_defs.h"
+#ifdef CONFIG_TCG_PASS_AREG0
+/* helper signature: helper_ld_mmu(CPUState *env, target_ulong addr,
+ int mmu_idx) */
+static const void * const qemu_ld_helpers[4] = {
+ helper_ldb_mmu,
+ helper_ldw_mmu,
+ helper_ldl_mmu,
+ helper_ldq_mmu,
+};
+
+/* helper signature: helper_st_mmu(CPUState *env, target_ulong addr,
+ uintxx_t val, int mmu_idx) */
+static const void * const qemu_st_helpers[4] = {
+ helper_stb_mmu,
+ helper_stw_mmu,
+ helper_stl_mmu,
+ helper_stq_mmu,
+};
+#else
+/* legacy helper signature: __ld_mmu(target_ulong addr, int
+ mmu_idx) */
static const void * const qemu_ld_helpers[4] = {
__ldb_mmu,
__ldw_mmu,
@@ -713,6 +743,8 @@
__ldq_mmu,
};
+/* legacy helper signature: __st_mmu(target_ulong addr, uintxx_t val,
+ int mmu_idx) */
static const void * const qemu_st_helpers[4] = {
__stb_mmu,
__stw_mmu,
@@ -720,6 +752,7 @@
__stq_mmu,
};
#endif
+#endif
#if TARGET_LONG_BITS == 32
#define TARGET_LD_OP LDUW
@@ -801,6 +834,17 @@
/* mov */
tcg_out_movi(s, TCG_TYPE_I32, arg1, mem_index);
+#ifdef CONFIG_TCG_PASS_AREG0
+ /* XXX/FIXME: suboptimal */
+ tcg_out_mov(s, TCG_TYPE_I32, tcg_target_call_iarg_regs[3],
+ tcg_target_call_iarg_regs[2]);
+ tcg_out_mov(s, TCG_TYPE_I64, tcg_target_call_iarg_regs[2],
+ tcg_target_call_iarg_regs[1]);
+ tcg_out_mov(s, TCG_TYPE_TL, tcg_target_call_iarg_regs[1],
+ tcg_target_call_iarg_regs[0]);
+ tcg_out_mov(s, TCG_TYPE_PTR, tcg_target_call_iarg_regs[0],
+ TCG_AREG0);
+#endif
/* XXX: move that code at the end of the TB */
/* qemu_ld_helper[s_bits](arg0, arg1) */
