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target-ppc: Introduce TM Noops

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Add degenerate implementations of the non-privileged Transactional
Memory instructions tend., tabort*. and tsr.  This implementation
simply checks the MSR[TM] bit and then sets CR0 to 0b0000.  This
is a reasonable degenerate implementation since transactions are
never allowed to begin and hence MSR[TS] is always 0b00.

Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Tom Musta 2014-12-18 10:34:35 -06:00 committed by Alexander Graf
parent 0ff93d11bc
commit 56a846157e
1 changed files with 38 additions and 0 deletions
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38
target-ppc/translate.c
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@ -9683,6 +9683,30 @@ static void gen_tbegin(DisasContext *ctx)
gen_helper_tbegin(cpu_env);
}
#define GEN_TM_NOOP(name) \
static inline void gen_##name(DisasContext *ctx) \
{ \
if (unlikely(!ctx->tm_enabled)) { \
gen_exception_err(ctx, POWERPC_EXCP_FU, FSCR_IC_TM); \
return; \
} \
/* Because tbegin always fails in QEMU, these user \
* space instructions all have a simple implementation: \
* \
* CR[0] = 0b0 || MSR[TS] || 0b0 \
* = 0b0 || 0b00 || 0b0 \
*/ \
tcg_gen_movi_i32(cpu_crf[0], 0); \
}
GEN_TM_NOOP(tend);
GEN_TM_NOOP(tabort);
GEN_TM_NOOP(tabortwc);
GEN_TM_NOOP(tabortwci);
GEN_TM_NOOP(tabortdc);
GEN_TM_NOOP(tabortdci);
GEN_TM_NOOP(tsr);
static opcode_t opcodes[] = {
GEN_HANDLER(invalid, 0x00, 0x00, 0x00, 0xFFFFFFFF, PPC_NONE),
GEN_HANDLER(cmp, 0x1F, 0x00, 0x00, 0x00400000, PPC_INTEGER),
@ -11098,6 +11122,20 @@ GEN_SPEOP_LDST(evstwwo, 0x1E, 2),
GEN_HANDLER2_E(tbegin, "tbegin", 0x1F, 0x0E, 0x14, 0x01DFF800, \
PPC_NONE, PPC2_TM),
GEN_HANDLER2_E(tend, "tend", 0x1F, 0x0E, 0x15, 0x01FFF800, \
PPC_NONE, PPC2_TM),
GEN_HANDLER2_E(tabort, "tabort", 0x1F, 0x0E, 0x1C, 0x03E0F800, \
PPC_NONE, PPC2_TM),
GEN_HANDLER2_E(tabortwc, "tabortwc", 0x1F, 0x0E, 0x18, 0x00000000, \
PPC_NONE, PPC2_TM),
GEN_HANDLER2_E(tabortwci, "tabortwci", 0x1F, 0x0E, 0x1A, 0x00000000, \
PPC_NONE, PPC2_TM),
GEN_HANDLER2_E(tabortdc, "tabortdc", 0x1F, 0x0E, 0x19, 0x00000000, \
PPC_NONE, PPC2_TM),
GEN_HANDLER2_E(tabortdci, "tabortdci", 0x1F, 0x0E, 0x1B, 0x00000000, \
PPC_NONE, PPC2_TM),
GEN_HANDLER2_E(tsr, "tsr", 0x1F, 0x0E, 0x17, 0x03DFF800, \
PPC_NONE, PPC2_TM),
};
#include "helper_regs.h"