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| author | Aurelien Jarno <aurelien@aurel32.net> | 2017-05-01 23:20:43 +0200 |
|---|---|---|
| committer | Aurelien Jarno <aurelien@aurel32.net> | 2017-05-13 11:18:27 +0200 |
| commit | cb32f179e00c51b32bf37a15191179b4fc472d29 (patch) | |
| tree | 3609edd49ecde36e0157eb75fdbc1862a5dc5537 | |
| parent | aa3513176f8c6f3150a9499f3d22da6c86b6b097 (diff) | |
| download | qemu-cb32f179e00c51b32bf37a15191179b4fc472d29.zip qemu-cb32f179e00c51b32bf37a15191179b4fc472d29.tar.gz qemu-cb32f179e00c51b32bf37a15191179b4fc472d29.tar.bz2 | |
target/sh4: implement tas.b using atomic helper
We only emulate UP SH4, however as the tas.b instruction is used in the GNU
libc, this improve linux-user emulation.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
| -rw-r--r-- | target/sh4/translate.c | 19 |
1 files changed, 7 insertions, 12 deletions
diff --git a/target/sh4/translate.c b/target/sh4/translate.c index d61b176..baed19b 100644 --- a/target/sh4/translate.c +++ b/target/sh4/translate.c @@ -1634,19 +1634,14 @@ static void _decode_opc(DisasContext * ctx) tcg_gen_shri_i32(REG(B11_8), REG(B11_8), 16); return; case 0x401b: /* tas.b @Rn */ - { - TCGv addr, val; - addr = tcg_temp_local_new(); - tcg_gen_mov_i32(addr, REG(B11_8)); - val = tcg_temp_local_new(); - tcg_gen_qemu_ld_i32(val, addr, ctx->memidx, MO_UB); + { + TCGv val = tcg_const_i32(0x80); + tcg_gen_atomic_fetch_or_i32(val, REG(B11_8), val, + ctx->memidx, MO_UB); tcg_gen_setcondi_i32(TCG_COND_EQ, cpu_sr_t, val, 0); - tcg_gen_ori_i32(val, val, 0x80); - tcg_gen_qemu_st_i32(val, addr, ctx->memidx, MO_UB); - tcg_temp_free(val); - tcg_temp_free(addr); - } - return; + tcg_temp_free(val); + } + return; case 0xf00d: /* fsts FPUL,FRn - FPSCR: Nothing */ CHECK_FPU_ENABLED tcg_gen_mov_i32(cpu_fregs[FREG(B11_8)], cpu_fpul); |