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target-ppc: Add ISA2.06 lbarx, lharx Instructions 

This patch adds the byte and halfword variants of the Load and
Reserve instructions.   Since there is much commonality among
all forms of Load and Reserve, a macro is provided and the existing
implementations of lwarx and ldarx are refactoried to use this
macro.

Signed-off-by: Tom Musta <tommusta@gmail.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Tom Musta 2014-01-07 10:05:56 -06:00 committed by Alexander Graf
parent 1fa6c53304
commit 5c77a786e2
1 changed files with 24 additions and 26 deletions
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50
target-ppc/translate.c
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@ -3207,21 +3207,29 @@ static void gen_isync(DisasContext *ctx)
gen_stop_exception(ctx);
}
/* lwarx */
static void gen_lwarx(DisasContext *ctx)
{
TCGv t0;
TCGv gpr = cpu_gpr[rD(ctx->opcode)];
gen_set_access_type(ctx, ACCESS_RES);
t0 = tcg_temp_local_new();
gen_addr_reg_index(ctx, t0);
gen_check_align(ctx, t0, 0x03);
gen_qemu_ld32u(ctx, gpr, t0);
tcg_gen_mov_tl(cpu_reserve, t0);
tcg_gen_st_tl(gpr, cpu_env, offsetof(CPUPPCState, reserve_val));
tcg_temp_free(t0);
#define LARX(name, len, loadop) \
static void gen_##name(DisasContext *ctx) \
{ \
TCGv t0; \
TCGv gpr = cpu_gpr[rD(ctx->opcode)]; \
gen_set_access_type(ctx, ACCESS_RES); \
t0 = tcg_temp_local_new(); \
gen_addr_reg_index(ctx, t0); \
if ((len) > 1) { \
gen_check_align(ctx, t0, (len)-1); \
} \
gen_qemu_##loadop(ctx, gpr, t0); \
tcg_gen_mov_tl(cpu_reserve, t0); \
tcg_gen_st_tl(gpr, cpu_env, offsetof(CPUPPCState, reserve_val)); \
tcg_temp_free(t0); \
}
/* lwarx */
LARX(lbarx, 1, ld8u);
LARX(lharx, 2, ld16u);
LARX(lwarx, 4, ld32u);
#if defined(CONFIG_USER_ONLY)
static void gen_conditional_store (DisasContext *ctx, TCGv EA,
int reg, int size)
@ -3268,19 +3276,7 @@ static void gen_stwcx_(DisasContext *ctx)
#if defined(TARGET_PPC64)
/* ldarx */
static void gen_ldarx(DisasContext *ctx)
{
TCGv t0;
TCGv gpr = cpu_gpr[rD(ctx->opcode)];
gen_set_access_type(ctx, ACCESS_RES);
t0 = tcg_temp_local_new();
gen_addr_reg_index(ctx, t0);
gen_check_align(ctx, t0, 0x07);
gen_qemu_ld64(ctx, gpr, t0);
tcg_gen_mov_tl(cpu_reserve, t0);
tcg_gen_st_tl(gpr, cpu_env, offsetof(CPUPPCState, reserve_val));
tcg_temp_free(t0);
}
LARX(ldarx, 8, ld64);
/* stdcx. */
static void gen_stdcx_(DisasContext *ctx)
@ -9513,6 +9509,8 @@ GEN_HANDLER(stswi, 0x1F, 0x15, 0x16, 0x00000001, PPC_STRING),
GEN_HANDLER(stswx, 0x1F, 0x15, 0x14, 0x00000001, PPC_STRING),
GEN_HANDLER(eieio, 0x1F, 0x16, 0x1A, 0x03FFF801, PPC_MEM_EIEIO),
GEN_HANDLER(isync, 0x13, 0x16, 0x04, 0x03FFF801, PPC_MEM),
GEN_HANDLER_E(lbarx, 0x1F, 0x14, 0x01, 0, PPC_NONE, PPC2_ATOMIC_ISA206),
GEN_HANDLER_E(lharx, 0x1F, 0x14, 0x03, 0, PPC_NONE, PPC2_ATOMIC_ISA206),
GEN_HANDLER(lwarx, 0x1F, 0x14, 0x00, 0x00000000, PPC_RES),
GEN_HANDLER2(stwcx_, "stwcx.", 0x1F, 0x16, 0x04, 0x00000000, PPC_RES),
#if defined(TARGET_PPC64)