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target-ppc: emulate load doubleword pair instructions

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Needed for Power ISA version 2.05 compliance. The check for odd register
pairs is done using the invalid bits.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Aurelien Jarno 2013-04-20 08:56:20 +00:00 committed by Alexander Graf
parent 199f830d19
commit 05050ee804
1 changed files with 48 additions and 0 deletions
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48
target-ppc/translate.c
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@ -3300,6 +3300,52 @@ GEN_LDFS(lfd, ld64, 0x12, PPC_FLOAT);
/* lfs lfsu lfsux lfsx */
GEN_LDFS(lfs, ld32fs, 0x10, PPC_FLOAT);
/* lfdp */
static void gen_lfdp(DisasContext *ctx)
{
TCGv EA;
if (unlikely(!ctx->fpu_enabled)) {
gen_exception(ctx, POWERPC_EXCP_FPU);
return;
}
gen_set_access_type(ctx, ACCESS_FLOAT);
EA = tcg_temp_new();
gen_addr_imm_index(ctx, EA, 0); \
if (unlikely(ctx->le_mode)) {
gen_qemu_ld64(ctx, cpu_fpr[rD(ctx->opcode) + 1], EA);
tcg_gen_addi_tl(EA, EA, 8);
gen_qemu_ld64(ctx, cpu_fpr[rD(ctx->opcode)], EA);
} else {
gen_qemu_ld64(ctx, cpu_fpr[rD(ctx->opcode)], EA);
tcg_gen_addi_tl(EA, EA, 8);
gen_qemu_ld64(ctx, cpu_fpr[rD(ctx->opcode) + 1], EA);
}
tcg_temp_free(EA);
}
/* lfdpx */
static void gen_lfdpx(DisasContext *ctx)
{
TCGv EA;
if (unlikely(!ctx->fpu_enabled)) {
gen_exception(ctx, POWERPC_EXCP_FPU);
return;
}
gen_set_access_type(ctx, ACCESS_FLOAT);
EA = tcg_temp_new();
gen_addr_reg_index(ctx, EA);
if (unlikely(ctx->le_mode)) {
gen_qemu_ld64(ctx, cpu_fpr[rD(ctx->opcode) + 1], EA);
tcg_gen_addi_tl(EA, EA, 8);
gen_qemu_ld64(ctx, cpu_fpr[rD(ctx->opcode)], EA);
} else {
gen_qemu_ld64(ctx, cpu_fpr[rD(ctx->opcode)], EA);
tcg_gen_addi_tl(EA, EA, 8);
gen_qemu_ld64(ctx, cpu_fpr[rD(ctx->opcode) + 1], EA);
}
tcg_temp_free(EA);
}
/* lfiwax */
static void gen_lfiwax(DisasContext *ctx)
{
@ -9035,6 +9081,8 @@ 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),
GEN_HANDLER_E(lfdp, 0x39, 0xFF, 0xFF, 0x00200003, PPC_NONE, PPC2_ISA205),
GEN_HANDLER_E(lfdpx, 0x1F, 0x17, 0x18, 0x00200001, PPC_NONE, PPC2_ISA205),
#undef GEN_STF
#undef GEN_STUF