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target-ppc: emulate fcpsgn instruction 

Needed for Power ISA version 2.05 compliance.

Reviewed-by: Richard Henderson <rth@twiddle.net>
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 08:56:18 +00:00 committed by Alexander Graf
parent 725bcec288
commit f03328882f
1 changed files with 14 additions and 0 deletions
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14
target-ppc/translate.c
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@ -2258,6 +2258,19 @@ static void gen_fneg(DisasContext *ctx)
gen_compute_fprf(cpu_fpr[rD(ctx->opcode)], 0, Rc(ctx->opcode) != 0);
}
/* fcpsgn: PowerPC 2.05 specification */
/* XXX: beware that fcpsgn never checks for NaNs nor update FPSCR */
static void gen_fcpsgn(DisasContext *ctx)
{
if (unlikely(!ctx->fpu_enabled)) {
gen_exception(ctx, POWERPC_EXCP_FPU);
return;
}
tcg_gen_deposit_i64(cpu_fpr[rD(ctx->opcode)], cpu_fpr[rA(ctx->opcode)],
cpu_fpr[rB(ctx->opcode)], 0, 63);
gen_compute_fprf(cpu_fpr[rD(ctx->opcode)], 0, Rc(ctx->opcode) != 0);
}
/*** Floating-Point status & ctrl register ***/
/* mcrfs */
@ -8559,6 +8572,7 @@ GEN_HANDLER(fabs, 0x3F, 0x08, 0x08, 0x001F0000, PPC_FLOAT),
GEN_HANDLER(fmr, 0x3F, 0x08, 0x02, 0x001F0000, PPC_FLOAT),
GEN_HANDLER(fnabs, 0x3F, 0x08, 0x04, 0x001F0000, PPC_FLOAT),
GEN_HANDLER(fneg, 0x3F, 0x08, 0x01, 0x001F0000, PPC_FLOAT),
GEN_HANDLER_E(fcpsgn, 0x3F, 0x08, 0x00, 0x00000000, PPC_NONE, PPC2_ISA205),
GEN_HANDLER(mcrfs, 0x3F, 0x00, 0x02, 0x0063F801, PPC_FLOAT),
GEN_HANDLER(mffs, 0x3F, 0x07, 0x12, 0x001FF800, PPC_FLOAT),
GEN_HANDLER(mtfsb0, 0x3F, 0x06, 0x02, 0x001FF800, PPC_FLOAT),