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target-ppc: emulate lfiwax instruction

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Needed for Power ISA version 2.05 compliance.

Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
[agraf: fix tcg debug error]
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Aurelien Jarno 2013-04-20 08:56:19 +00:00 committed by Alexander Graf
parent f03328882f
commit 199f830d19
1 changed files with 21 additions and 0 deletions
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21
target-ppc/translate.c
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@ -3300,6 +3300,26 @@ GEN_LDFS(lfd, ld64, 0x12, PPC_FLOAT);
/* lfs lfsu lfsux lfsx */
GEN_LDFS(lfs, ld32fs, 0x10, PPC_FLOAT);
/* lfiwax */
static void gen_lfiwax(DisasContext *ctx)
{
TCGv EA;
TCGv t0;
if (unlikely(!ctx->fpu_enabled)) {
gen_exception(ctx, POWERPC_EXCP_FPU);
return;
}
gen_set_access_type(ctx, ACCESS_FLOAT);
EA = tcg_temp_new();
t0 = tcg_temp_new();
gen_addr_reg_index(ctx, EA);
gen_qemu_ld32u(ctx, t0, EA);
tcg_gen_ext_tl_i64(cpu_fpr[rD(ctx->opcode)], t0);
tcg_gen_ext32s_i64(cpu_fpr[rD(ctx->opcode)], cpu_fpr[rD(ctx->opcode)]);
tcg_temp_free(EA);
tcg_temp_free(t0);
}
/*** Floating-point store ***/
#define GEN_STF(name, stop, opc, type) \
static void glue(gen_, name)(DisasContext *ctx) \
@ -9014,6 +9034,7 @@ GEN_LDXF(name, ldop, 0x17, op | 0x00, type)
GEN_LDFS(lfd, ld64, 0x12, PPC_FLOAT)
GEN_LDFS(lfs, ld32fs, 0x10, PPC_FLOAT)
GEN_HANDLER_E(lfiwax, 0x1f, 0x17, 0x1a, 0x00000001, PPC_NONE, PPC2_ISA205),
#undef GEN_STF
#undef GEN_STUF