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[PATCH v2 74/76] target/microblaze: Remove cpu_R[0]
From: |
Richard Henderson |
Subject: |
[PATCH v2 74/76] target/microblaze: Remove cpu_R[0] |
Date: |
Fri, 28 Aug 2020 07:19:27 -0700 |
Do not initialize cpu_R[0], as this should be totally unused.
The cpu_for_read and cpu_for_write functions use a local temp.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/microblaze/translate.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/target/microblaze/translate.c b/target/microblaze/translate.c
index 8f69ca50b2..8c287457a9 100644
--- a/target/microblaze/translate.c
+++ b/target/microblaze/translate.c
@@ -1842,7 +1842,13 @@ void mb_tcg_init(void)
static const struct {
TCGv_i32 *var; int ofs; char name[8];
} i32s[] = {
- R(0), R(1), R(2), R(3), R(4), R(5), R(6), R(7),
+ /*
+ * Note that r0 is handled specially in reg_for_read
+ * and reg_for_write. Nothing should touch cpu_R[0].
+ * Leave that element NULL, which will assert quickly
+ * inside the tcg generator functions.
+ */
+ R(1), R(2), R(3), R(4), R(5), R(6), R(7),
R(8), R(9), R(10), R(11), R(12), R(13), R(14), R(15),
R(16), R(17), R(18), R(19), R(20), R(21), R(22), R(23),
R(24), R(25), R(26), R(27), R(28), R(29), R(30), R(31),
--
2.25.1
- [PATCH v2 65/76] target/microblaze: Reorganize branching, (continued)
- [PATCH v2 65/76] target/microblaze: Reorganize branching, Richard Henderson, 2020/08/28
- [PATCH v2 66/76] target/microblaze: Convert dec_br to decodetree, Richard Henderson, 2020/08/28
- [PATCH v2 68/76] target/microblaze: Convert dec_rts to decodetree, Richard Henderson, 2020/08/28
- [PATCH v2 67/76] target/microblaze: Convert dec_bcc to decodetree, Richard Henderson, 2020/08/28
- [PATCH v2 69/76] target/microblaze: Tidy do_rti, do_rtb, do_rte, Richard Henderson, 2020/08/28
- [PATCH v2 71/76] target/microblaze: Convert dec_msr to decodetree, Richard Henderson, 2020/08/28
- [PATCH v2 70/76] target/microblaze: Convert msrclr, msrset to decodetree, Richard Henderson, 2020/08/28
- [PATCH v2 72/76] target/microblaze: Convert dec_stream to decodetree, Richard Henderson, 2020/08/28
- [PATCH v2 73/76] target/microblaze: Remove last of old decoder, Richard Henderson, 2020/08/28
- [PATCH v2 75/76] target/microblaze: Add flags markup to some helpers, Richard Henderson, 2020/08/28
- [PATCH v2 74/76] target/microblaze: Remove cpu_R[0],
Richard Henderson <=
- [PATCH v2 76/76] target/microblaze: Reduce linux-user address space to 32-bit, Richard Henderson, 2020/08/28
- Re: [PATCH v2 00/76] target/microblaze improvements, Edgar E. Iglesias, 2020/08/31