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target/mips: Fix MIPS64 MFC0 UserLocal on BE host

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Using MFC0 to read CP0_UserLocal uses tcg_gen_ld32s_tl, however
CP0_UserLocal is a target_ulong. On a big endian host with a MIPS64
target this reads and sign extends the more significant half of the
64-bit register.

Fix this by using ld_tl to load the whole target_ulong and ext32s_tl to
sign extend it, as done for various other target_ulong COP0 registers.

Fixes: d279279e2b ("target-mips: implement UserLocal Register")
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Yongbok Kim <yongbok.kim@imgtec.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: Petar Jovanovic <petar.jovanovic@imgtec.com>
Reviewed-by: Yongbok Kim <yongbok.kim@imgtec.com>
Signed-off-by: Yongbok Kim <yongbok.kim@imgtec.com>
This commit is contained in:
James Hogan 2017-07-18 12:55:46 +01:00 committed by Yongbok Kim
parent 25d0233c1a
commit e40df9a80b
1 changed files with 3 additions and 2 deletions
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5
target/mips/translate.c
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@ -5144,8 +5144,9 @@ static void gen_mfc0(DisasContext *ctx, TCGv arg, int reg, int sel)
goto cp0_unimplemented;
case 2:
CP0_CHECK(ctx->ulri);
tcg_gen_ld32s_tl(arg, cpu_env,
offsetof(CPUMIPSState, active_tc.CP0_UserLocal));
tcg_gen_ld_tl(arg, cpu_env,
offsetof(CPUMIPSState, active_tc.CP0_UserLocal));
tcg_gen_ext32s_tl(arg, arg);
rn = "UserLocal";
break;
default: