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target/arm: Convert T16, load (literal)

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Backports commit 46beb58efbb8a2a32f601a041aa22801a3138ece from qemu
This commit is contained in:
Richard Henderson 2019-11-20 12:43:44 -05:00 committed by Lioncash
parent fad910c50b
commit 2bc615157d
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GPG key ID: 4E3C3CC1031BA9C7
2 changed files with 6 additions and 41 deletions
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4
qemu/target/arm/t16.decode
View file

@ -113,6 +113,10 @@ LDRH_ri 10001 ..... ... ... @ldst_ri_2
STR_ri 10010 ... ........ @ldst_spec_i rn=13
LDR_ri 10011 ... ........ @ldst_spec_i rn=13
# Load (PC-relative)
LDR_ri 01001 ... ........ @ldst_spec_i rn=15
# Add PC/SP (immediate)
ADR 10100 rd:3 ........ imm=%imm8_0x4

43
qemu/target/arm/translate.c
View file

@ -1025,14 +1025,6 @@ static inline void gen_aa32_ld##SUFF(DisasContext *s, TCGv_i32 val, \
TCGv_i32 a32, int index) \
{ \
gen_aa32_ld_i32(s, val, a32, index, OPC | s->be_data); \
} \
static inline void gen_aa32_ld##SUFF##_iss(DisasContext *s, \
TCGv_i32 val, \
TCGv_i32 a32, int index, \
ISSInfo issinfo) \
{ \
gen_aa32_ld##SUFF(s, val, a32, index); \
disas_set_da_iss(s, OPC, issinfo); \
}
#define DO_GEN_ST(SUFF, OPC) \
@ -1040,14 +1032,6 @@ static inline void gen_aa32_st##SUFF(DisasContext *s, TCGv_i32 val, \
TCGv_i32 a32, int index) \
{ \
gen_aa32_st_i32(s, val, a32, index, OPC | s->be_data); \
} \
static inline void gen_aa32_st##SUFF##_iss(DisasContext *s, \
TCGv_i32 val, \
TCGv_i32 a32, int index, \
ISSInfo issinfo) \
{ \
gen_aa32_st##SUFF(s, val, a32, index); \
disas_set_da_iss(s, OPC, issinfo | ISSIsWrite); \
}
static inline void gen_aa32_frob64(DisasContext *s, TCGv_i64 val)
@ -1100,9 +1084,7 @@ static inline void gen_aa32_st64(DisasContext *s, TCGv_i64 val,
gen_aa32_st_i64(s, val, a32, index, MO_Q | s->be_data);
}
DO_GEN_LD(8s, MO_SB)
DO_GEN_LD(8u, MO_UB)
DO_GEN_LD(16s, MO_SW)
DO_GEN_LD(16u, MO_UW)
DO_GEN_LD(32u, MO_UL)
DO_GEN_ST(8, MO_UB)
@ -11108,11 +11090,10 @@ static void disas_thumb2_insn(DisasContext *s, uint32_t insn)
static void disas_thumb_insn(DisasContext *s, uint32_t insn)
{
TCGContext *tcg_ctx = s->uc->tcg_ctx;
uint32_t val, rd;
uint32_t val;
int32_t offset;
TCGv_i32 tmp;
TCGv_i32 tmp2;
TCGv_i32 addr;
if (disas_t16(s, insn)) {
return;
@ -11122,27 +11103,7 @@ static void disas_thumb_insn(DisasContext *s, uint32_t insn)
switch (insn >> 12) {
case 0: case 1: /* add/sub (3reg, 2reg imm), shift imm; in decodetree */
case 2: case 3: /* add, sub, cmp, mov (reg, imm), in decodetree */
goto illegal_op;
case 4:
if (insn & (1 << 11)) {
rd = (insn >> 8) & 7;
/* load pc-relative. Bit 1 of PC is ignored. */
addr = add_reg_for_lit(s, 15, (insn & 0xff) * 4);
tmp = tcg_temp_new_i32(tcg_ctx);
gen_aa32_ld32u_iss(s, tmp, addr, get_mem_index(s),
rd | ISSIs16Bit);
tcg_temp_free_i32(tcg_ctx, addr);
store_reg(s, rd, tmp);
break;
}
/*
* 0b0100_00xx_xxxx_xxxx
* - Data-processing (two low registers), in decodetree
* - data processing extended, branch and exchange, in decodetree
*/
goto illegal_op;
case 4: /* ldr lit, data proc (2reg), data proc ext, bx; in decodetree */
case 5: /* load/store register offset, in decodetree */
case 6: /* load/store word immediate offset, in decodetree */
case 7: /* load/store byte immediate offset, in decodetree */