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tcg: Introduce tcg_target_call_oarg_reg 

Replace the flat array tcg_target_call_oarg_regs[] with
a function call including the TCGCallReturnKind.

Extend the set of registers for ARM to r0-r3 to match the ABI:
https://github.com/ARM-software/abi-aa/blob/main/aapcs32/aapcs32.rst#result-return

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2022-10-20 00:55:36 +10:00
parent 313bdea84d
commit 5e3d0c199f
11 changed files with 72 additions and 46 deletions
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10
tcg/aarch64/tcg-target.c.inc
View File

@ -63,9 +63,13 @@ static const int tcg_target_call_iarg_regs[8] = {
TCG_REG_X0, TCG_REG_X1, TCG_REG_X2, TCG_REG_X3,
TCG_REG_X4, TCG_REG_X5, TCG_REG_X6, TCG_REG_X7
};
static const int tcg_target_call_oarg_regs[1] = {
TCG_REG_X0
};
static TCGReg tcg_target_call_oarg_reg(TCGCallReturnKind kind, int slot)
{
tcg_debug_assert(kind == TCG_CALL_RET_NORMAL);
tcg_debug_assert(slot >= 0 && slot <= 1);
return TCG_REG_X0 + slot;
}
#define TCG_REG_TMP TCG_REG_X30
#define TCG_VEC_TMP TCG_REG_V31

10
tcg/arm/tcg-target.c.inc
View File

@ -79,9 +79,13 @@ static const int tcg_target_reg_alloc_order[] = {
static const int tcg_target_call_iarg_regs[4] = {
TCG_REG_R0, TCG_REG_R1, TCG_REG_R2, TCG_REG_R3
};
static const int tcg_target_call_oarg_regs[2] = {
TCG_REG_R0, TCG_REG_R1
};
static TCGReg tcg_target_call_oarg_reg(TCGCallReturnKind kind, int slot)
{
tcg_debug_assert(kind == TCG_CALL_RET_NORMAL);
tcg_debug_assert(slot >= 0 && slot <= 3);
return TCG_REG_R0 + slot;
}
#define TCG_REG_TMP TCG_REG_R12
#define TCG_VEC_TMP TCG_REG_Q15

16
tcg/i386/tcg-target.c.inc
View File

@ -109,12 +109,16 @@ static const int tcg_target_call_iarg_regs[] = {
#endif
};
static const int tcg_target_call_oarg_regs[] = {
TCG_REG_EAX,
#if TCG_TARGET_REG_BITS == 32
TCG_REG_EDX
#endif
};
static TCGReg tcg_target_call_oarg_reg(TCGCallReturnKind kind, int slot)
{
switch (kind) {
case TCG_CALL_RET_NORMAL:
tcg_debug_assert(slot >= 0 && slot <= 1);
return slot ? TCG_REG_EDX : TCG_REG_EAX;
default:
g_assert_not_reached();
}
}
/* Constants we accept. */
#define TCG_CT_CONST_S32 0x100

10
tcg/loongarch64/tcg-target.c.inc
View File

@ -114,10 +114,12 @@ static const int tcg_target_call_iarg_regs[] = {
TCG_REG_A7,
};
static const int tcg_target_call_oarg_regs[] = {
TCG_REG_A0,
TCG_REG_A1,
};
static TCGReg tcg_target_call_oarg_reg(TCGCallReturnKind kind, int slot)
{
tcg_debug_assert(kind == TCG_CALL_RET_NORMAL);
tcg_debug_assert(slot >= 0 && slot <= 1);
return TCG_REG_A0 + slot;
}
#ifndef CONFIG_SOFTMMU
#define USE_GUEST_BASE (guest_base != 0)

10
tcg/mips/tcg-target.c.inc
View File

@ -136,10 +136,12 @@ static const TCGReg tcg_target_call_iarg_regs[] = {
#endif
};
static const TCGReg tcg_target_call_oarg_regs[2] = {
TCG_REG_V0,
TCG_REG_V1
};
static TCGReg tcg_target_call_oarg_reg(TCGCallReturnKind kind, int slot)
{
tcg_debug_assert(kind == TCG_CALL_RET_NORMAL);
tcg_debug_assert(slot >= 0 && slot <= 1);
return TCG_REG_V0 + slot;
}
static const tcg_insn_unit *tb_ret_addr;
static const tcg_insn_unit *bswap32_addr;

10
tcg/ppc/tcg-target.c.inc
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@ -186,10 +186,12 @@ static const int tcg_target_call_iarg_regs[] = {
TCG_REG_R10
};
static const int tcg_target_call_oarg_regs[] = {
TCG_REG_R3,
TCG_REG_R4
};
static TCGReg tcg_target_call_oarg_reg(TCGCallReturnKind kind, int slot)
{
tcg_debug_assert(kind == TCG_CALL_RET_NORMAL);
tcg_debug_assert(slot >= 0 && slot <= 1);
return TCG_REG_R3 + slot;
}
static const int tcg_target_callee_save_regs[] = {
#ifdef _CALL_DARWIN

10
tcg/riscv/tcg-target.c.inc
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@ -113,10 +113,12 @@ static const int tcg_target_call_iarg_regs[] = {
TCG_REG_A7,
};
static const int tcg_target_call_oarg_regs[] = {
TCG_REG_A0,
TCG_REG_A1,
};
static TCGReg tcg_target_call_oarg_reg(TCGCallReturnKind kind, int slot)
{
tcg_debug_assert(kind == TCG_CALL_RET_NORMAL);
tcg_debug_assert(slot >= 0 && slot <= 1);
return TCG_REG_A0 + slot;
}
#define TCG_CT_CONST_ZERO 0x100
#define TCG_CT_CONST_S12 0x200

9
tcg/s390x/tcg-target.c.inc
View File

@ -402,9 +402,12 @@ static const int tcg_target_call_iarg_regs[] = {
TCG_REG_R6,
};
static const int tcg_target_call_oarg_regs[] = {
TCG_REG_R2,
};
static TCGReg tcg_target_call_oarg_reg(TCGCallReturnKind kind, int slot)
{
tcg_debug_assert(kind == TCG_CALL_RET_NORMAL);
tcg_debug_assert(slot == 0);
return TCG_REG_R2;
}
#define S390_CC_EQ 8
#define S390_CC_LT 4

12
tcg/sparc64/tcg-target.c.inc
View File

@ -132,12 +132,12 @@ static const int tcg_target_call_iarg_regs[6] = {
TCG_REG_O5,
};
static const int tcg_target_call_oarg_regs[] = {
TCG_REG_O0,
TCG_REG_O1,
TCG_REG_O2,
TCG_REG_O3,
};
static TCGReg tcg_target_call_oarg_reg(TCGCallReturnKind kind, int slot)
{
tcg_debug_assert(kind == TCG_CALL_RET_NORMAL);
tcg_debug_assert(slot >= 0 && slot <= 3);
return TCG_REG_O0 + slot;
}
#define INSN_OP(x) ((x) << 30)
#define INSN_OP2(x) ((x) << 22)

9
tcg/tcg.c
View File

@ -151,6 +151,7 @@ static bool tcg_out_sti(TCGContext *s, TCGType type, TCGArg val,
TCGReg base, intptr_t ofs);
static void tcg_out_call(TCGContext *s, const tcg_insn_unit *target,
const TCGHelperInfo *info);
static TCGReg tcg_target_call_oarg_reg(TCGCallReturnKind kind, int slot);
static bool tcg_target_const_match(int64_t val, TCGType type, int ct);
#ifdef TCG_TARGET_NEED_LDST_LABELS
static int tcg_out_ldst_finalize(TCGContext *s);
@ -740,14 +741,16 @@ static void init_call_layout(TCGHelperInfo *info)
case dh_typecode_s64:
info->nr_out = 64 / TCG_TARGET_REG_BITS;
info->out_kind = TCG_CALL_RET_NORMAL;
assert(info->nr_out <= ARRAY_SIZE(tcg_target_call_oarg_regs));
/* Query the last register now to trigger any assert early. */
tcg_target_call_oarg_reg(info->out_kind, info->nr_out - 1);
break;
case dh_typecode_i128:
info->nr_out = 128 / TCG_TARGET_REG_BITS;
info->out_kind = TCG_CALL_RET_NORMAL; /* TODO */
switch (/* TODO */ TCG_CALL_RET_NORMAL) {
case TCG_CALL_RET_NORMAL:
assert(info->nr_out <= ARRAY_SIZE(tcg_target_call_oarg_regs));
/* Query the last register now to trigger any assert early. */
tcg_target_call_oarg_reg(info->out_kind, info->nr_out - 1);
break;
case TCG_CALL_RET_BY_REF:
/*
@ -4592,7 +4595,7 @@ static void tcg_reg_alloc_call(TCGContext *s, TCGOp *op)
case TCG_CALL_RET_NORMAL:
for (i = 0; i < nb_oargs; i++) {
TCGTemp *ts = arg_temp(op->args[i]);
TCGReg reg = tcg_target_call_oarg_regs[i];
TCGReg reg = tcg_target_call_oarg_reg(TCG_CALL_RET_NORMAL, i);
/* ENV should not be modified. */
tcg_debug_assert(!temp_readonly(ts));

12
tcg/tci/tcg-target.c.inc
View File

@ -200,12 +200,12 @@ static const int tcg_target_reg_alloc_order[] = {
/* No call arguments via registers. All will be stored on the "stack". */
static const int tcg_target_call_iarg_regs[] = { };
static const int tcg_target_call_oarg_regs[] = {
TCG_REG_R0,
#if TCG_TARGET_REG_BITS == 32
TCG_REG_R1
#endif
};
static TCGReg tcg_target_call_oarg_reg(TCGCallReturnKind kind, int slot)
{
tcg_debug_assert(kind == TCG_CALL_RET_NORMAL);
tcg_debug_assert(slot >= 0 && slot < 64 / TCG_TARGET_REG_BITS);
return TCG_REG_R0 + slot;
}
#ifdef CONFIG_DEBUG_TCG
static const char *const tcg_target_reg_names[TCG_TARGET_NB_REGS] = {