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[PATCH 05/12] tcg/mips: Split out tcg_out_movi_one
From: |
Richard Henderson |
Subject: |
[PATCH 05/12] tcg/mips: Split out tcg_out_movi_one |
Date: |
Fri, 7 Apr 2023 20:03:52 -0700 |
Emit all constants that can be loaded in exactly one insn.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
tcg/mips/tcg-target.c.inc | 26 ++++++++++++++++++++------
1 file changed, 20 insertions(+), 6 deletions(-)
diff --git a/tcg/mips/tcg-target.c.inc b/tcg/mips/tcg-target.c.inc
index c2f8d6550b..f0ae418ba6 100644
--- a/tcg/mips/tcg-target.c.inc
+++ b/tcg/mips/tcg-target.c.inc
@@ -514,20 +514,34 @@ static bool tcg_out_mov(TCGContext *s, TCGType type,
TCGReg ret, TCGReg arg)
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,
TCGReg ret, tcg_target_long arg)
{
if (TCG_TARGET_REG_BITS == 64 && type == TCG_TYPE_I32) {
arg = (int32_t)arg;
}
- if (arg == (int16_t)arg) {
- tcg_out_opc_imm(s, OPC_ADDIU, ret, TCG_REG_ZERO, arg);
- return;
- }
- if (arg == (uint16_t)arg) {
- tcg_out_opc_imm(s, OPC_ORI, ret, TCG_REG_ZERO, arg);
+
+ if (tcg_out_movi_one(s, ret, arg)) {
return;
}
+
if (TCG_TARGET_REG_BITS == 32 || arg == (int32_t)arg) {
tcg_out_opc_imm(s, OPC_LUI, ret, TCG_REG_ZERO, arg >> 16);
} else {
--
2.34.1
- [PATCH for-8.1 00/12] tcg/mips: Backend improvements, Richard Henderson, 2023/04/07
- [PATCH 02/12] tcg/mips: Move TCG_GUEST_BASE_REG to S7, Richard Henderson, 2023/04/07
- [PATCH 01/12] tcg/mips: Move TCG_AREG0 to S8, Richard Henderson, 2023/04/07
- [PATCH 03/12] tcg/mips: Unify TCG_GUEST_BASE_REG tests, Richard Henderson, 2023/04/07
- [PATCH 05/12] tcg/mips: Split out tcg_out_movi_one,
Richard Henderson <=
- [PATCH 09/12] tcg/mips: Try tb-relative addresses in tcg_out_movi, Richard Henderson, 2023/04/07
- [PATCH 10/12] tcg/mips: Try three insns with shift and add in tcg_out_movi, Richard Henderson, 2023/04/07
- [PATCH 08/12] tcg/mips: Aggressively use the constant pool for n64 calls, Richard Henderson, 2023/04/07
- [PATCH 07/12] tcg/mips: Use the constant pool for 64-bit constants, Richard Henderson, 2023/04/07
- [PATCH 12/12] tcg/mips: Replace MIPS_BE with HOST_BIG_ENDIAN, Richard Henderson, 2023/04/07
- [PATCH 11/12] tcg/mips: Use qemu_build_not_reached for LO/HI_OFF, Richard Henderson, 2023/04/07