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| author | Tom Musta <tommusta@gmail.com> | 2014-12-18 10:34:36 -0600 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2015-01-07 16:16:28 +0100 |
| commit | aeedd58234e7f211bcd6d0ad04cdc60c2a967aca (patch) | |
| tree | e91a5ddd7a45d467796047a44ec060535329b6b8 /target-ppc | |
| parent | 56a846157edaba3389eb141e104774451d82ce51 (diff) | |
| download | qemu-aeedd58234e7f211bcd6d0ad04cdc60c2a967aca.tar.gz qemu-aeedd58234e7f211bcd6d0ad04cdc60c2a967aca.tar.bz2 qemu-aeedd58234e7f211bcd6d0ad04cdc60c2a967aca.zip | |
target-ppc: Introduce tcheck
Add a degenerate implementation of the Transaction Check (tcheck)
instruction. Since transaction always immediately fail, this
implementation simply sets CR[BF] to 0b1000, i.e. TDOOMED = 1
and MSR[TS] == 0.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'target-ppc')
| -rw-r--r-- | target-ppc/translate.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/target-ppc/translate.c b/target-ppc/translate.c index 9c820d1e88..95a2198462 100644 --- a/target-ppc/translate.c +++ b/target-ppc/translate.c @@ -9707,6 +9707,21 @@ GEN_TM_NOOP(tabortdc); GEN_TM_NOOP(tabortdci); GEN_TM_NOOP(tsr); +static void gen_tcheck(DisasContext *ctx) +{ + if (unlikely(!ctx->tm_enabled)) { + gen_exception_err(ctx, POWERPC_EXCP_FU, FSCR_IC_TM); + return; + } + /* Because tbegin always fails, the tcheck implementation + * is simple: + * + * CR[CRF] = TDOOMED || MSR[TS] || 0b0 + * = 0b1 || 0b00 || 0b0 + */ + tcg_gen_movi_i32(cpu_crf[crfD(ctx->opcode)], 0x8); +} + static opcode_t opcodes[] = { GEN_HANDLER(invalid, 0x00, 0x00, 0x00, 0xFFFFFFFF, PPC_NONE), GEN_HANDLER(cmp, 0x1F, 0x00, 0x00, 0x00400000, PPC_INTEGER), @@ -11136,6 +11151,8 @@ 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), +GEN_HANDLER2_E(tcheck, "tcheck", 0x1F, 0x0E, 0x16, 0x007FF800, \ + PPC_NONE, PPC2_TM), }; #include "helper_regs.h" |