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target-mips: add gen_base_offset_addr 

This is a common pattern in existing code.  We'll also use it to
implement the mips16 SAVE/RESTORE instructions.

Signed-off-by: Nathan Froyd <froydnj@codesourcery.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Nathan Froyd 2009-12-08 10:01:01 -08:00 committed by Aurelien Jarno
parent 7dca4ad050
commit 662d748516
1 changed files with 16 additions and 24 deletions
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40
target-mips/translate.c
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@ -981,6 +981,19 @@ OP_ST_ATOMIC(scd,st64,ld64,0x7);
#endif
#undef OP_ST_ATOMIC
static void gen_base_offset_addr (DisasContext *ctx, TCGv addr,
int base, int16_t offset)
{
if (base == 0) {
tcg_gen_movi_tl(addr, offset);
} else if (offset == 0) {
gen_load_gpr(addr, base);
} else {
tcg_gen_movi_tl(addr, offset);
gen_op_addr_add(ctx, addr, cpu_gpr[base], addr);
}
}
/* Load and store */
static void gen_ldst (DisasContext *ctx, uint32_t opc, int rt,
int base, int16_t offset)
@ -989,14 +1002,7 @@ static void gen_ldst (DisasContext *ctx, uint32_t opc, int rt,
TCGv t0 = tcg_temp_new();
TCGv t1 = tcg_temp_new();
if (base == 0) {
tcg_gen_movi_tl(t0, offset);
} else if (offset == 0) {
gen_load_gpr(t0, base);
} else {
tcg_gen_movi_tl(t0, offset);
gen_op_addr_add(ctx, t0, cpu_gpr[base], t0);
}
gen_base_offset_addr(ctx, t0, base, offset);
/* Don't do NOP if destination is zero: we must perform the actual
memory access. */
switch (opc) {
@ -1147,14 +1153,7 @@ static void gen_st_cond (DisasContext *ctx, uint32_t opc, int rt,
t0 = tcg_temp_local_new();
if (base == 0) {
tcg_gen_movi_tl(t0, offset);
} else if (offset == 0) {
gen_load_gpr(t0, base);
} else {
tcg_gen_movi_tl(t0, offset);
gen_op_addr_add(ctx, t0, cpu_gpr[base], t0);
}
gen_base_offset_addr(ctx, t0, base, offset);
/* Don't do NOP if destination is zero: we must perform the actual
memory access. */
@ -1186,14 +1185,7 @@ static void gen_flt_ldst (DisasContext *ctx, uint32_t opc, int ft,
const char *opn = "flt_ldst";
TCGv t0 = tcg_temp_new();
if (base == 0) {
tcg_gen_movi_tl(t0, offset);
} else if (offset == 0) {
gen_load_gpr(t0, base);
} else {
tcg_gen_movi_tl(t0, offset);
gen_op_addr_add(ctx, t0, cpu_gpr[base], t0);
}
gen_base_offset_addr(ctx, t0, base, offset);
/* Don't do NOP if destination is zero: we must perform the actual
memory access. */
switch (opc) {