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target-mips: Misaligned memory accesses for R6 

Release 6 requires misaligned memory access support for all ordinary memory
access instructions (for example, LW/SW, LWC1/SWC1).
However misaligned support is not provided for certain special memory accesses
such as atomics (for example, LL/SC).

Signed-off-by: Yongbok Kim <yongbok.kim@imgtec.com>
Reviewed-by: Leon Alrae <leon.alrae@imgtec.com>
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
This commit is contained in:
Yongbok Kim 2015-06-01 12:13:22 +01:00 committed by Leon Alrae
parent 71c199c81d
commit be3a8c53b4
2 changed files with 28 additions and 13 deletions
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39
target-mips/translate.c
View File

@ -1414,6 +1414,7 @@ typedef struct DisasContext {
int32_t CP0_Config1;
/* Routine used to access memory */
int mem_idx;
TCGMemOp default_tcg_memop_mask;
uint32_t hflags, saved_hflags;
int bstate;
target_ulong btarget;
@ -2086,12 +2087,14 @@ static void gen_ld(DisasContext *ctx, uint32_t opc,
switch (opc) {
#if defined(TARGET_MIPS64)
case OPC_LWU:
tcg_gen_qemu_ld_tl(t0, t0, ctx->mem_idx, MO_TEUL);
tcg_gen_qemu_ld_tl(t0, t0, ctx->mem_idx, MO_TEUL |
ctx->default_tcg_memop_mask);
gen_store_gpr(t0, rt);
opn = "lwu";
break;
case OPC_LD:
tcg_gen_qemu_ld_tl(t0, t0, ctx->mem_idx, MO_TEQ);
tcg_gen_qemu_ld_tl(t0, t0, ctx->mem_idx, MO_TEQ |
ctx->default_tcg_memop_mask);
gen_store_gpr(t0, rt);
opn = "ld";
break;
@ -2162,17 +2165,20 @@ static void gen_ld(DisasContext *ctx, uint32_t opc,
opn = "lwpc";
break;
case OPC_LW:
tcg_gen_qemu_ld_tl(t0, t0, ctx->mem_idx, MO_TESL);
tcg_gen_qemu_ld_tl(t0, t0, ctx->mem_idx, MO_TESL |
ctx->default_tcg_memop_mask);
gen_store_gpr(t0, rt);
opn = "lw";
break;
case OPC_LH:
tcg_gen_qemu_ld_tl(t0, t0, ctx->mem_idx, MO_TESW);
tcg_gen_qemu_ld_tl(t0, t0, ctx->mem_idx, MO_TESW |
ctx->default_tcg_memop_mask);
gen_store_gpr(t0, rt);
opn = "lh";
break;
case OPC_LHU:
tcg_gen_qemu_ld_tl(t0, t0, ctx->mem_idx, MO_TEUW);
tcg_gen_qemu_ld_tl(t0, t0, ctx->mem_idx, MO_TEUW |
ctx->default_tcg_memop_mask);
gen_store_gpr(t0, rt);
opn = "lhu";
break;
@ -2256,7 +2262,8 @@ static void gen_st (DisasContext *ctx, uint32_t opc, int rt,
switch (opc) {
#if defined(TARGET_MIPS64)
case OPC_SD:
tcg_gen_qemu_st_tl(t1, t0, ctx->mem_idx, MO_TEQ);
tcg_gen_qemu_st_tl(t1, t0, ctx->mem_idx, MO_TEQ |
ctx->default_tcg_memop_mask);
opn = "sd";
break;
case OPC_SDL:
@ -2271,11 +2278,13 @@ static void gen_st (DisasContext *ctx, uint32_t opc, int rt,
break;
#endif
case OPC_SW:
tcg_gen_qemu_st_tl(t1, t0, ctx->mem_idx, MO_TEUL);
tcg_gen_qemu_st_tl(t1, t0, ctx->mem_idx, MO_TEUL |
ctx->default_tcg_memop_mask);
opn = "sw";
break;
case OPC_SH:
tcg_gen_qemu_st_tl(t1, t0, ctx->mem_idx, MO_TEUW);
tcg_gen_qemu_st_tl(t1, t0, ctx->mem_idx, MO_TEUW |
ctx->default_tcg_memop_mask);
opn = "sh";
break;
case OPC_SB:
@ -2352,7 +2361,8 @@ static void gen_flt_ldst (DisasContext *ctx, uint32_t opc, int ft,
case OPC_LWC1:
{
TCGv_i32 fp0 = tcg_temp_new_i32();
tcg_gen_qemu_ld_i32(fp0, t0, ctx->mem_idx, MO_TESL);
tcg_gen_qemu_ld_i32(fp0, t0, ctx->mem_idx, MO_TESL |
ctx->default_tcg_memop_mask);
gen_store_fpr32(ctx, fp0, ft);
tcg_temp_free_i32(fp0);
}
@ -2362,7 +2372,8 @@ static void gen_flt_ldst (DisasContext *ctx, uint32_t opc, int ft,
{
TCGv_i32 fp0 = tcg_temp_new_i32();
gen_load_fpr32(ctx, fp0, ft);
tcg_gen_qemu_st_i32(fp0, t0, ctx->mem_idx, MO_TEUL);
tcg_gen_qemu_st_i32(fp0, t0, ctx->mem_idx, MO_TEUL |
ctx->default_tcg_memop_mask);
tcg_temp_free_i32(fp0);
}
opn = "swc1";
@ -2370,7 +2381,8 @@ static void gen_flt_ldst (DisasContext *ctx, uint32_t opc, int ft,
case OPC_LDC1:
{
TCGv_i64 fp0 = tcg_temp_new_i64();
tcg_gen_qemu_ld_i64(fp0, t0, ctx->mem_idx, MO_TEQ);
tcg_gen_qemu_ld_i64(fp0, t0, ctx->mem_idx, MO_TEQ |
ctx->default_tcg_memop_mask);
gen_store_fpr64(ctx, fp0, ft);
tcg_temp_free_i64(fp0);
}
@ -2380,7 +2392,8 @@ static void gen_flt_ldst (DisasContext *ctx, uint32_t opc, int ft,
{
TCGv_i64 fp0 = tcg_temp_new_i64();
gen_load_fpr64(ctx, fp0, ft);
tcg_gen_qemu_st_i64(fp0, t0, ctx->mem_idx, MO_TEQ);
tcg_gen_qemu_st_i64(fp0, t0, ctx->mem_idx, MO_TEQ |
ctx->default_tcg_memop_mask);
tcg_temp_free_i64(fp0);
}
opn = "sdc1";
@ -19149,6 +19162,8 @@ gen_intermediate_code_internal(MIPSCPU *cpu, TranslationBlock *tb,
#else
ctx.mem_idx = ctx.hflags & MIPS_HFLAG_KSU;
#endif
ctx.default_tcg_memop_mask = (ctx.insn_flags & ISA_MIPS32R6) ?
MO_UNALN : MO_ALIGN;
num_insns = 0;
max_insns = tb->cflags & CF_COUNT_MASK;
if (max_insns == 0)

2
target-mips/translate_init.c
View File

@ -607,7 +607,7 @@ static const mips_def_t mips_defs[] =
},
{
/* A generic CPU supporting MIPS64 Release 6 ISA.
FIXME: Support IEEE 754-2008 FP and misaligned memory accesses.
FIXME: Support IEEE 754-2008 FP.
Eventually this should be replaced by a real CPU model. */
.name = "MIPS64R6-generic",
.CP0_PRid = 0x00010000,