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tcg/riscv: Support split-wx code generation

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Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2020-11-04 13:11:26 -08:00
parent 4b6a52d01e
commit 793f738196
2 changed files with 24 additions and 19 deletions
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41
tcg/riscv/tcg-target.c.inc
View file

@ -425,41 +425,44 @@ static void tcg_out_nop_fill(tcg_insn_unit *p, int count)
* Relocations
*/
static bool reloc_sbimm12(tcg_insn_unit *code_ptr, tcg_insn_unit *target)
static bool reloc_sbimm12(tcg_insn_unit *src_rw, const tcg_insn_unit *target)
{
intptr_t offset = (intptr_t)target - (intptr_t)code_ptr;
const tcg_insn_unit *src_rx = tcg_splitwx_to_rx(src_rw);
intptr_t offset = (intptr_t)target - (intptr_t)src_rx;
tcg_debug_assert((offset & 1) == 0);
if (offset == sextreg(offset, 0, 12)) {
code_ptr[0] |= encode_sbimm12(offset);
*src_rw |= encode_sbimm12(offset);
return true;
}
return false;
}
static bool reloc_jimm20(tcg_insn_unit *code_ptr, tcg_insn_unit *target)
static bool reloc_jimm20(tcg_insn_unit *src_rw, const tcg_insn_unit *target)
{
intptr_t offset = (intptr_t)target - (intptr_t)code_ptr;
const tcg_insn_unit *src_rx = tcg_splitwx_to_rx(src_rw);
intptr_t offset = (intptr_t)target - (intptr_t)src_rx;
tcg_debug_assert((offset & 1) == 0);
if (offset == sextreg(offset, 0, 20)) {
code_ptr[0] |= encode_ujimm20(offset);
*src_rw |= encode_ujimm20(offset);
return true;
}
return false;
}
static bool reloc_call(tcg_insn_unit *code_ptr, const tcg_insn_unit *target)
static bool reloc_call(tcg_insn_unit *src_rw, const tcg_insn_unit *target)
{
intptr_t offset = (intptr_t)target - (intptr_t)code_ptr;
const tcg_insn_unit *src_rx = tcg_splitwx_to_rx(src_rw);
intptr_t offset = (intptr_t)target - (intptr_t)src_rx;
int32_t lo = sextreg(offset, 0, 12);
int32_t hi = offset - lo;
if (offset == hi + lo) {
code_ptr[0] |= encode_uimm20(hi);
code_ptr[1] |= encode_imm12(lo);
src_rw[0] |= encode_uimm20(hi);
src_rw[1] |= encode_imm12(lo);
return true;
}
@ -532,7 +535,7 @@ static void tcg_out_movi(TCGContext *s, TCGType type, TCGReg rd,
if (tmp == (int32_t)tmp) {
tcg_out_opc_upper(s, OPC_AUIPC, rd, 0);
tcg_out_opc_imm(s, OPC_ADDI, rd, rd, 0);
ret = reloc_call(s->code_ptr - 2, (tcg_insn_unit *)val);
ret = reloc_call(s->code_ptr - 2, (const tcg_insn_unit *)val);
tcg_debug_assert(ret == true);
return;
}
@ -917,7 +920,7 @@ QEMU_BUILD_BUG_ON(TCG_TARGET_REG_BITS < TARGET_LONG_BITS);
QEMU_BUILD_BUG_ON(TLB_MASK_TABLE_OFS(0) > 0);
QEMU_BUILD_BUG_ON(TLB_MASK_TABLE_OFS(0) < -(1 << 11));
static void tcg_out_goto(TCGContext *s, tcg_insn_unit *target)
static void tcg_out_goto(TCGContext *s, const tcg_insn_unit *target)
{
tcg_out_opc_jump(s, OPC_JAL, TCG_REG_ZERO, 0);
bool ok = reloc_jimm20(s->code_ptr - 1, target);
@ -993,7 +996,8 @@ static void add_qemu_ldst_label(TCGContext *s, int is_ld, TCGMemOpIdx oi,
label->datahi_reg = datahi;
label->addrlo_reg = addrlo;
label->addrhi_reg = addrhi;
label->raddr = raddr;
/* TODO: Cast goes away when all hosts converted */
label->raddr = (void *)tcg_splitwx_to_rx(raddr);
label->label_ptr[0] = label_ptr[0];
}
@ -1012,7 +1016,7 @@ static bool tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *l)
}
/* resolve label address */
if (!reloc_sbimm12(l->label_ptr[0], s->code_ptr)) {
if (!reloc_sbimm12(l->label_ptr[0], tcg_splitwx_to_rx(s->code_ptr))) {
return false;
}
@ -1046,7 +1050,7 @@ static bool tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *l)
}
/* resolve label address */
if (!reloc_sbimm12(l->label_ptr[0], s->code_ptr)) {
if (!reloc_sbimm12(l->label_ptr[0], tcg_splitwx_to_rx(s->code_ptr))) {
return false;
}
@ -1232,7 +1236,7 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, bool is_64)
#endif
}
static tcg_insn_unit *tb_ret_addr;
static const tcg_insn_unit *tb_ret_addr;
static void tcg_out_op(TCGContext *s, TCGOpcode opc,
const TCGArg *args, const int *const_args)
@ -1780,11 +1784,12 @@ static void tcg_target_qemu_prologue(TCGContext *s)
tcg_out_opc_imm(s, OPC_JALR, TCG_REG_ZERO, tcg_target_call_iarg_regs[1], 0);
/* Return path for goto_ptr. Set return value to 0 */
tcg_code_gen_epilogue = s->code_ptr;
/* TODO: Cast goes away when all hosts converted */
tcg_code_gen_epilogue = (void *)tcg_splitwx_to_rx(s->code_ptr);
tcg_out_mov(s, TCG_TYPE_REG, TCG_REG_A0, TCG_REG_ZERO);
/* TB epilogue */
tb_ret_addr = s->code_ptr;
tb_ret_addr = tcg_splitwx_to_rx(s->code_ptr);
for (i = 0; i < ARRAY_SIZE(tcg_target_callee_save_regs); i++) {
tcg_out_ld(s, TCG_TYPE_REG, tcg_target_callee_save_regs[i],
TCG_REG_SP, SAVE_OFS + i * REG_SIZE);

2
tcg/riscv/tcg-target.h
View file

@ -171,6 +171,6 @@ void tb_target_set_jmp_target(uintptr_t, uintptr_t, uintptr_t, uintptr_t);
#define TCG_TARGET_NEED_POOL_LABELS
#define TCG_TARGET_HAS_MEMORY_BSWAP 0
#define TCG_TARGET_SUPPORT_MIRROR 0
#define TCG_TARGET_SUPPORT_MIRROR 1
#endif