diff options
author | Blue Swirl <blauwirbel@gmail.com> | 2012-02-15 18:02:32 +0000 |
---|---|---|
committer | Blue Swirl <blauwirbel@gmail.com> | 2012-03-18 12:21:48 +0000 |
commit | 6a18ae2d2947532d5c26439548afa0481c4529f9 (patch) | |
tree | 3500cfc398fd03282a6987b8773d76ebb6a13a8c /tcg | |
parent | 361dea401f529fc136aaeb49c82b2a5bb7faa316 (diff) | |
download | hqemu-6a18ae2d2947532d5c26439548afa0481c4529f9.zip hqemu-6a18ae2d2947532d5c26439548afa0481c4529f9.tar.gz |
i386: Remove REGPARM
Use stack based calling convention (GCC default) for interfacing with
generated code instead of register based convention (regparm(3)).
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Diffstat (limited to 'tcg')
-rw-r--r-- | tcg/i386/tcg-target.c | 112 | ||||
-rw-r--r-- | tcg/ppc/tcg-target.h | 2 | ||||
-rw-r--r-- | tcg/tcg.c | 14 | ||||
-rw-r--r-- | tcg/tcg.h | 7 |
4 files changed, 58 insertions, 77 deletions
diff --git a/tcg/i386/tcg-target.c b/tcg/i386/tcg-target.c index fafd900..c4e940d 100644 --- a/tcg/i386/tcg-target.c +++ b/tcg/i386/tcg-target.c @@ -116,17 +116,7 @@ static inline int tcg_target_get_call_iarg_regs_count(int flags) return 6; } - flags &= TCG_CALL_TYPE_MASK; - switch(flags) { - case TCG_CALL_TYPE_STD: - return 0; - case TCG_CALL_TYPE_REGPARM_1: - case TCG_CALL_TYPE_REGPARM_2: - case TCG_CALL_TYPE_REGPARM: - return flags - TCG_CALL_TYPE_REGPARM_1 + 1; - default: - tcg_abort(); - } + return 0; } /* parse target specific constraints */ @@ -1148,7 +1138,12 @@ static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, int data_reg, data_reg2 = 0; int addrlo_idx; #if defined(CONFIG_SOFTMMU) - int mem_index, s_bits, arg_idx; + int mem_index, s_bits; +#if TCG_TARGET_REG_BITS == 64 + int arg_idx; +#else + int stack_adjust; +#endif uint8_t *label_ptr[3]; #endif @@ -1184,16 +1179,33 @@ static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, } /* XXX: move that code at the end of the TB */ +#if TCG_TARGET_REG_BITS == 32 + tcg_out_pushi(s, mem_index); + stack_adjust = 4; + if (TARGET_LONG_BITS == 64) { + tcg_out_push(s, args[addrlo_idx + 1]); + stack_adjust += 4; + } + tcg_out_push(s, args[addrlo_idx]); + stack_adjust += 4; +#else /* The first argument is already loaded with addrlo. */ arg_idx = 1; - if (TCG_TARGET_REG_BITS == 32 && TARGET_LONG_BITS == 64) { - tcg_out_mov(s, TCG_TYPE_I32, tcg_target_call_iarg_regs[arg_idx++], - args[addrlo_idx + 1]); - } tcg_out_movi(s, TCG_TYPE_I32, tcg_target_call_iarg_regs[arg_idx], mem_index); +#endif + tcg_out_calli(s, (tcg_target_long)qemu_ld_helpers[s_bits]); +#if TCG_TARGET_REG_BITS == 32 + if (stack_adjust == (TCG_TARGET_REG_BITS / 8)) { + /* Pop and discard. This is 2 bytes smaller than the add. */ + tcg_out_pop(s, TCG_REG_ECX); + } else if (stack_adjust != 0) { + tcg_out_addi(s, TCG_REG_CALL_STACK, stack_adjust); + } +#endif + switch(opc) { case 0 | 4: tcg_out_ext8s(s, data_reg, TCG_REG_EAX, P_REXW); @@ -1359,45 +1371,27 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, } /* XXX: move that code at the end of the TB */ - if (TCG_TARGET_REG_BITS == 64) { - tcg_out_mov(s, (opc == 3 ? TCG_TYPE_I64 : TCG_TYPE_I32), - TCG_REG_RSI, data_reg); - tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_RDX, mem_index); - stack_adjust = 0; - } else if (TARGET_LONG_BITS == 32) { - tcg_out_mov(s, TCG_TYPE_I32, TCG_REG_EDX, data_reg); - if (opc == 3) { - tcg_out_mov(s, TCG_TYPE_I32, TCG_REG_ECX, data_reg2); - tcg_out_pushi(s, mem_index); - stack_adjust = 4; - } else { - tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_ECX, mem_index); - stack_adjust = 0; - } - } else { - if (opc == 3) { - tcg_out_mov(s, TCG_TYPE_I32, TCG_REG_EDX, args[addrlo_idx + 1]); - tcg_out_pushi(s, mem_index); - tcg_out_push(s, data_reg2); - tcg_out_push(s, data_reg); - stack_adjust = 12; - } else { - tcg_out_mov(s, TCG_TYPE_I32, TCG_REG_EDX, args[addrlo_idx + 1]); - switch(opc) { - case 0: - tcg_out_ext8u(s, TCG_REG_ECX, data_reg); - break; - case 1: - tcg_out_ext16u(s, TCG_REG_ECX, data_reg); - break; - case 2: - tcg_out_mov(s, TCG_TYPE_I32, TCG_REG_ECX, data_reg); - break; - } - tcg_out_pushi(s, mem_index); - stack_adjust = 4; - } +#if TCG_TARGET_REG_BITS == 32 + tcg_out_pushi(s, mem_index); + stack_adjust = 4; + if (opc == 3) { + tcg_out_push(s, data_reg2); + stack_adjust += 4; + } + tcg_out_push(s, data_reg); + stack_adjust += 4; + if (TARGET_LONG_BITS == 64) { + tcg_out_push(s, args[addrlo_idx + 1]); + stack_adjust += 4; } + tcg_out_push(s, args[addrlo_idx]); + stack_adjust += 4; +#else + tcg_out_mov(s, (opc == 3 ? TCG_TYPE_I64 : TCG_TYPE_I32), + TCG_REG_RSI, data_reg); + tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_RDX, mem_index); + stack_adjust = 0; +#endif tcg_out_calli(s, (tcg_target_long)qemu_st_helpers[s_bits]); @@ -1962,9 +1956,15 @@ static void tcg_target_qemu_prologue(TCGContext *s) tcg_out_push(s, tcg_target_callee_save_regs[i]); } - tcg_out_addi(s, TCG_REG_ESP, -stack_addend); - +#if TCG_TARGET_REG_BITS == 32 + tcg_out_ld(s, TCG_TYPE_PTR, TCG_AREG0, TCG_REG_ESP, + (ARRAY_SIZE(tcg_target_callee_save_regs) + 1) * 4); + tcg_out_ld(s, TCG_TYPE_PTR, tcg_target_call_iarg_regs[1], TCG_REG_ESP, + (ARRAY_SIZE(tcg_target_callee_save_regs) + 2) * 4); +#else tcg_out_mov(s, TCG_TYPE_PTR, TCG_AREG0, tcg_target_call_iarg_regs[0]); +#endif + tcg_out_addi(s, TCG_REG_ESP, -stack_addend); /* jmp *tb. */ tcg_out_modrm(s, OPC_GRP5, EXT5_JMPN_Ev, tcg_target_call_iarg_regs[1]); diff --git a/tcg/ppc/tcg-target.h b/tcg/ppc/tcg-target.h index 3f22aaa..2f37fd2 100644 --- a/tcg/ppc/tcg-target.h +++ b/tcg/ppc/tcg-target.h @@ -98,5 +98,5 @@ typedef enum { #define TCG_TARGET_HAS_GUEST_BASE #define tcg_qemu_tb_exec(env, tb_ptr) \ - ((long REGPARM __attribute__ ((longcall)) \ + ((long __attribute__ ((longcall)) \ (*)(void *, void *))code_gen_prologue)(env, tb_ptr) @@ -594,9 +594,6 @@ void tcg_register_helper(void *func, const char *name) void tcg_gen_callN(TCGContext *s, TCGv_ptr func, unsigned int flags, int sizemask, TCGArg ret, int nargs, TCGArg *args) { -#if defined(TCG_TARGET_I386) && TCG_TARGET_REG_BITS < 64 - int call_type; -#endif int i; int real_args; int nb_rets; @@ -621,9 +618,6 @@ void tcg_gen_callN(TCGContext *s, TCGv_ptr func, unsigned int flags, *gen_opc_ptr++ = INDEX_op_call; nparam = gen_opparam_ptr++; -#if defined(TCG_TARGET_I386) && TCG_TARGET_REG_BITS < 64 - call_type = (flags & TCG_CALL_TYPE_MASK); -#endif if (ret != TCG_CALL_DUMMY_ARG) { #if TCG_TARGET_REG_BITS < 64 if (sizemask & 1) { @@ -649,14 +643,6 @@ void tcg_gen_callN(TCGContext *s, TCGv_ptr func, unsigned int flags, #if TCG_TARGET_REG_BITS < 64 int is_64bit = sizemask & (1 << (i+1)*2); if (is_64bit) { -#ifdef TCG_TARGET_I386 - /* REGPARM case: if the third parameter is 64 bit, it is - allocated on the stack */ - if (i == 2 && call_type == TCG_CALL_TYPE_REGPARM) { - call_type = TCG_CALL_TYPE_REGPARM_2; - flags = (flags & ~TCG_CALL_TYPE_MASK) | call_type; - } -#endif #ifdef TCG_TARGET_CALL_ALIGN_ARGS /* some targets want aligned 64 bit args */ if (real_args & 1) { @@ -252,11 +252,6 @@ typedef int TCGv_i64; #define TCGV_UNUSED_I64(x) x = MAKE_TCGV_I64(-1) /* call flags */ -#define TCG_CALL_TYPE_MASK 0x000f -#define TCG_CALL_TYPE_STD 0x0000 /* standard C call */ -#define TCG_CALL_TYPE_REGPARM_1 0x0001 /* i386 style regparm call (1 reg) */ -#define TCG_CALL_TYPE_REGPARM_2 0x0002 /* i386 style regparm call (2 regs) */ -#define TCG_CALL_TYPE_REGPARM 0x0003 /* i386 style regparm call (3 regs) */ /* A pure function only reads its arguments and TCG global variables and cannot raise exceptions. Hence a call to a pure function can be safely suppressed if the return value is not used. */ @@ -589,5 +584,5 @@ extern uint8_t code_gen_prologue[]; /* TCG targets may use a different definition of tcg_qemu_tb_exec. */ #if !defined(tcg_qemu_tb_exec) # define tcg_qemu_tb_exec(env, tb_ptr) \ - ((tcg_target_ulong REGPARM (*)(void *, void *))code_gen_prologue)(env, tb_ptr) + ((tcg_target_ulong (*)(void *, void *))code_gen_prologue)(env, tb_ptr) #endif |