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tcg/mips: Split out tcg_out_movi_one 

Emit all constants that can be loaded in exactly one insn.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2021-08-06 12:02:59 -10:00
parent 53c4fa2726
commit 47a572865a
1 changed files with 20 additions and 6 deletions
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26
tcg/mips/tcg-target.c.inc
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@ -510,20 +510,34 @@ static bool tcg_out_mov(TCGContext *s, TCGType type, TCGReg ret, TCGReg arg)
return true; return true;
} }
static bool tcg_out_movi_one(TCGContext *s, TCGReg ret, tcg_target_long arg)
{
if (arg == (int16_t)arg) {
tcg_out_opc_imm(s, OPC_ADDIU, ret, TCG_REG_ZERO, arg);
return true;
}
if (arg == (uint16_t)arg) {
tcg_out_opc_imm(s, OPC_ORI, ret, TCG_REG_ZERO, arg);
return true;
}
if (arg == (int32_t)arg && (arg & 0xffff) == 0) {
tcg_out_opc_imm(s, OPC_LUI, ret, TCG_REG_ZERO, arg >> 16);
return true;
}
return false;
}
static void tcg_out_movi(TCGContext *s, TCGType type, static void tcg_out_movi(TCGContext *s, TCGType type,
TCGReg ret, tcg_target_long arg) TCGReg ret, tcg_target_long arg)
{ {
if (TCG_TARGET_REG_BITS == 64 && type == TCG_TYPE_I32) { if (TCG_TARGET_REG_BITS == 64 && type == TCG_TYPE_I32) {
arg = (int32_t)arg; arg = (int32_t)arg;
} }
if (arg == (int16_t)arg) {
tcg_out_opc_imm(s, OPC_ADDIU, ret, TCG_REG_ZERO, arg); if (tcg_out_movi_one(s, ret, arg)) {
return;
}
if (arg == (uint16_t)arg) {
tcg_out_opc_imm(s, OPC_ORI, ret, TCG_REG_ZERO, arg);
return; return;
} }
if (TCG_TARGET_REG_BITS == 32 || arg == (int32_t)arg) { if (TCG_TARGET_REG_BITS == 32 || arg == (int32_t)arg) {
tcg_out_opc_imm(s, OPC_LUI, ret, TCG_REG_ZERO, arg >> 16); tcg_out_opc_imm(s, OPC_LUI, ret, TCG_REG_ZERO, arg >> 16);
} else { } else {