haraldwolff/qemu-patch-raspberry4
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tcg/arm: remove useless register tests in qemu_ld/st

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addr_reg, data_reg and data_reg2 can't be register r0 or r1 du to the
constraints. Don't check if they equals these registers.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Aurelien Jarno 2010-04-09 20:52:48 +02:00
parent 67dcab7327
commit 2633a2d015
1 changed files with 10 additions and 20 deletions
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30
tcg/arm/tcg-target.c
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@ -1048,10 +1048,8 @@ static inline void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, int opc)
# if TARGET_LONG_BITS == 32
tcg_out_dat_imm(s, COND_AL, ARITH_MOV, TCG_REG_R1, 0, mem_index);
# else
if (addr_reg2 != TCG_REG_R1) {
tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
TCG_REG_R1, 0, addr_reg2, SHIFT_IMM_LSL(0));
}
tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
TCG_REG_R1, 0, addr_reg2, SHIFT_IMM_LSL(0));
tcg_out_dat_imm(s, COND_AL, ARITH_MOV, TCG_REG_R2, 0, mem_index);
# endif
tcg_out_bl(s, COND_AL, (tcg_target_long) qemu_ld_helpers[s_bits] -
@ -1257,10 +1255,8 @@ static inline void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, int opc)
tcg_out_b(s, COND_EQ, 8);
/* TODO: move this code to where the constants pool will be */
if (addr_reg != TCG_REG_R0) {
tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
TCG_REG_R0, 0, addr_reg, SHIFT_IMM_LSL(0));
}
tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
TCG_REG_R0, 0, addr_reg, SHIFT_IMM_LSL(0));
# if TARGET_LONG_BITS == 32
switch (opc) {
case 0:
@ -1272,17 +1268,13 @@ static inline void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, int opc)
tcg_out_dat_imm(s, COND_AL, ARITH_MOV, TCG_REG_R2, 0, mem_index);
break;
case 2:
if (data_reg != TCG_REG_R1) {
tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
TCG_REG_R1, 0, data_reg, SHIFT_IMM_LSL(0));
}
tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
TCG_REG_R1, 0, data_reg, SHIFT_IMM_LSL(0));
tcg_out_dat_imm(s, COND_AL, ARITH_MOV, TCG_REG_R2, 0, mem_index);
break;
case 3:
if (data_reg != TCG_REG_R1) {
tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
TCG_REG_R1, 0, data_reg, SHIFT_IMM_LSL(0));
}
tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
TCG_REG_R1, 0, data_reg, SHIFT_IMM_LSL(0));
if (data_reg2 != TCG_REG_R2) {
tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
TCG_REG_R2, 0, data_reg2, SHIFT_IMM_LSL(0));
@ -1291,10 +1283,8 @@ static inline void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, int opc)
break;
}
# else
if (addr_reg2 != TCG_REG_R1) {
tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
TCG_REG_R1, 0, addr_reg2, SHIFT_IMM_LSL(0));
}
tcg_out_dat_reg(s, COND_AL, ARITH_MOV,
TCG_REG_R1, 0, addr_reg2, SHIFT_IMM_LSL(0));
switch (opc) {
case 0:
tcg_out_ext8u(s, COND_AL, TCG_REG_R2, data_reg);