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target-sparc: Directly implement easy ldd/std asis

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Backports commit e4dc0052a40d3e7b00ca0b008f345e2ed644aa20 from qemu
This commit is contained in:
Richard Henderson 2018-02-25 18:06:56 -05:00 committed by Lioncash
parent 1ed7df7720
commit eb285aa281
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GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 103 additions and 12 deletions
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115
qemu/target-sparc/translate.c
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@ -2114,6 +2114,7 @@ typedef enum {
GET_ASI_HELPER,
GET_ASI_EXCP,
GET_ASI_DIRECT,
GET_ASI_DTWINX,
} ASIType;
typedef struct {
@ -2173,18 +2174,26 @@ static DisasASI get_asi(DisasContext *dc, int insn, TCGMemOp memop)
switch (asi) {
case ASI_N: /* Nucleus */
case ASI_NL: /* Nucleus LE */
case ASI_TWINX_N:
case ASI_TWINX_NL:
mem_idx = MMU_NUCLEUS_IDX;
break;
case ASI_AIUP: /* As if user primary */
case ASI_AIUPL: /* As if user primary LE */
case ASI_TWINX_AIUP:
case ASI_TWINX_AIUP_L:
mem_idx = MMU_USER_IDX;
break;
case ASI_AIUS: /* As if user secondary */
case ASI_AIUSL: /* As if user secondary LE */
case ASI_TWINX_AIUS:
case ASI_TWINX_AIUS_L:
mem_idx = MMU_USER_SECONDARY_IDX;
break;
case ASI_S: /* Secondary */
case ASI_SL: /* Secondary LE */
case ASI_TWINX_S:
case ASI_TWINX_SL:
if (mem_idx == MMU_USER_IDX) {
mem_idx = MMU_USER_SECONDARY_IDX;
} else if (mem_idx == MMU_KERNEL_IDX) {
@ -2193,6 +2202,8 @@ static DisasASI get_asi(DisasContext *dc, int insn, TCGMemOp memop)
break;
case ASI_P: /* Primary */
case ASI_PL: /* Primary LE */
case ASI_TWINX_P:
case ASI_TWINX_PL:
break;
}
switch (asi) {
@ -2208,6 +2219,18 @@ static DisasASI get_asi(DisasContext *dc, int insn, TCGMemOp memop)
case ASI_PL:
type = GET_ASI_DIRECT;
break;
case ASI_TWINX_N:
case ASI_TWINX_NL:
case ASI_TWINX_AIUP:
case ASI_TWINX_AIUP_L:
case ASI_TWINX_AIUS:
case ASI_TWINX_AIUS_L:
case ASI_TWINX_P:
case ASI_TWINX_PL:
case ASI_TWINX_S:
case ASI_TWINX_SL:
type = GET_ASI_DTWINX;
break;
}
/* The little-endian asis all have bit 3 set. */
if (asi & 8) {
@ -2232,6 +2255,9 @@ static void gen_ld_asi(DisasContext *dc, TCGv dst, TCGv addr,
switch (da.type) {
case GET_ASI_EXCP:
break;
case GET_ASI_DTWINX: /* Reserved for ldda. */
gen_exception(dc, TT_ILL_INSN);
break;
case GET_ASI_DIRECT:
gen_address_mask(dc, addr);
tcg_gen_qemu_ld_tl(dc->uc, dst, addr, da.mem_idx, da.memop);
@ -2270,6 +2296,9 @@ static void gen_st_asi(DisasContext *dc, TCGv src, TCGv addr,
switch (da.type) {
case GET_ASI_EXCP:
break;
case GET_ASI_DTWINX: /* Reserved for stda. */
gen_exception(dc, TT_ILL_INSN);
break;
case GET_ASI_DIRECT:
gen_address_mask(dc, addr);
tcg_gen_qemu_st_tl(dc->uc, src, addr, da.mem_idx, da.memop);
@ -2441,33 +2470,60 @@ static void gen_stf_asi(DisasContext *dc, TCGv addr,
}
}
static void gen_ldda_asi(DisasContext *dc, TCGv hi, TCGv addr,
int insn, int rd)
static void gen_ldda_asi(DisasContext *dc, TCGv addr, int insn, int rd)
{
TCGContext *tcg_ctx = dc->uc->tcg_ctx;
DisasASI da = get_asi(dc, insn, MO_TEQ);
TCGv_i64 hi = gen_dest_gpr(dc, rd);
TCGv_i64 lo = gen_dest_gpr(dc, rd + 1);
switch (da.type) {
case GET_ASI_EXCP:
return;
case GET_ASI_DTWINX:
gen_check_align(dc, addr, 15);
gen_address_mask(dc, addr);
tcg_gen_qemu_ld_i64(dc->uc, hi, addr, da.mem_idx, da.memop);
tcg_gen_addi_tl(tcg_ctx, addr, addr, 8);
tcg_gen_qemu_ld_i64(dc->uc, lo, addr, da.mem_idx, da.memop);
break;
case GET_ASI_DIRECT:
{
TCGv_i64 tmp = tcg_temp_new_i64(tcg_ctx);
gen_address_mask(dc, addr);
tcg_gen_qemu_ld_i64(dc->uc, tmp, addr, da.mem_idx, da.memop);
/* Note that LE ldda acts as if each 32-bit register
result is byte swapped. Having just performed one
64-bit bswap, we need now to swap the writebacks. */
if ((da.memop & MO_BSWAP) == MO_TE) {
tcg_gen_extr32_i64(tcg_ctx, lo, hi, tmp);
} else {
tcg_gen_extr32_i64(tcg_ctx, hi, lo, tmp);
}
tcg_temp_free_i64(tcg_ctx, tmp);
}
break;
default:
{
TCGv_i32 r_asi = tcg_const_i32(tcg_ctx, da.asi);
TCGv_i64 tmp;
save_state(dc);
gen_helper_ldda_asi(tcg_ctx, tcg_ctx->cpu_env, addr, r_asi);
tcg_temp_free_i32(tcg_ctx, r_asi);
tmp = gen_dest_gpr(dc, rd);
tcg_gen_ld_i64(tcg_ctx, tmp, tcg_ctx->cpu_env, offsetof(CPUSPARCState, qt0.high));
gen_store_gpr(dc, rd, tmp);
tmp = gen_dest_gpr(dc, rd + 1);
tcg_gen_ld_i64(tcg_ctx, tmp, tcg_ctx->cpu_env, offsetof(CPUSPARCState, qt0.low));
gen_store_gpr(dc, rd + 1, tmp);
tcg_gen_ld_i64(tcg_ctx, hi, tcg_ctx->cpu_env, offsetof(CPUSPARCState, qt0.high));
tcg_gen_ld_i64(tcg_ctx, lo, tcg_ctx->cpu_env, offsetof(CPUSPARCState, qt0.low));
}
break;
}
gen_store_gpr(dc, rd, hi);
gen_store_gpr(dc, rd + 1, lo);
}
static void gen_stda_asi(DisasContext *dc, TCGv hi, TCGv addr,
@ -2480,6 +2536,33 @@ static void gen_stda_asi(DisasContext *dc, TCGv hi, TCGv addr,
switch (da.type) {
case GET_ASI_EXCP:
break;
case GET_ASI_DTWINX:
gen_check_align(dc, addr, 15);
gen_address_mask(dc, addr);
tcg_gen_qemu_st_i64(dc->uc, hi, addr, da.mem_idx, da.memop);
tcg_gen_addi_tl(tcg_ctx, addr, addr, 8);
tcg_gen_qemu_st_i64(dc->uc, lo, addr, da.mem_idx, da.memop);
break;
case GET_ASI_DIRECT:
{
TCGv_i64 t64 = tcg_temp_new_i64(tcg_ctx);
/* Note that LE stda acts as if each 32-bit register result is
byte swapped. We will perform one 64-bit LE store, so now
we must swap the order of the construction. */
if ((da.memop & MO_BSWAP) == MO_TE) {
tcg_gen_concat32_i64(tcg_ctx, t64, lo, hi);
} else {
tcg_gen_concat32_i64(tcg_ctx, t64, hi, lo);
}
gen_address_mask(dc, addr);
tcg_gen_qemu_st_i64(dc->uc, t64, addr, da.mem_idx, da.memop);
tcg_temp_free_i64(tcg_ctx, t64);
}
break;
default:
{
TCGv_i32 r_asi = tcg_const_i32(tcg_ctx, da.asi);
@ -2522,8 +2605,7 @@ static void gen_casx_asi(DisasContext *dc, TCGv addr, TCGv val2,
#elif !defined(CONFIG_USER_ONLY)
static void gen_ldda_asi(DisasContext *dc, TCGv hi, TCGv addr,
int insn, int rd)
static void gen_ldda_asi(DisasContext *dc, TCGv addr, int insn, int rd)
{
/* ??? Work around an apparent bug in Ubuntu gcc 4.8.2-10ubuntu2+12,
whereby "rd + 1" elicits "error: array subscript is above array".
@ -2531,6 +2613,7 @@ static void gen_ldda_asi(DisasContext *dc, TCGv hi, TCGv addr,
are unchanged. */
TCGContext *tcg_ctx = dc->uc->tcg_ctx;
TCGv lo = gen_dest_gpr(dc, rd | 1);
TCGv hi = gen_dest_gpr(dc, rd);
TCGv_i64 t64 = tcg_temp_new_i64(tcg_ctx);
DisasASI da = get_asi(dc, insn, MO_TEQ);
@ -2538,6 +2621,10 @@ static void gen_ldda_asi(DisasContext *dc, TCGv hi, TCGv addr,
case GET_ASI_EXCP:
tcg_temp_free_i64(tcg_ctx, t64);
return;
case GET_ASI_DIRECT:
gen_address_mask(dc, addr);
tcg_gen_qemu_ld_i64(dc->uc, t64, addr, da.mem_idx, da.memop);
break;
default:
{
TCGv_i32 r_asi = tcg_const_i32(tcg_ctx, da.asi);
@ -2572,6 +2659,10 @@ static void gen_stda_asi(DisasContext *dc, TCGv hi, TCGv addr,
switch (da.type) {
case GET_ASI_EXCP:
break;
case GET_ASI_DIRECT:
gen_address_mask(dc, addr);
tcg_gen_qemu_st_i64(dc->uc, t64, addr, da.mem_idx, da.memop);
break;
default:
{
TCGv_i32 r_asi = tcg_const_i32(tcg_ctx, da.asi);
@ -5075,7 +5166,7 @@ static void disas_sparc_insn(DisasContext * dc, unsigned int insn, bool hook_ins
if (rd & 1) {
goto illegal_insn;
}
gen_ldda_asi(dc, cpu_val, cpu_addr, insn, rd);
gen_ldda_asi(dc, cpu_addr, insn, rd);
goto skip_move;
case 0x19: /* ldsba, load signed byte alternate */
gen_ld_asi(dc, cpu_val, cpu_addr, insn, MO_SB);