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[PATCH v2 2/5] target/mips: Replace GET_LMASK() macro by get_lmask(32) f
From: |
Philippe Mathieu-Daudé |
Subject: |
[PATCH v2 2/5] target/mips: Replace GET_LMASK() macro by get_lmask(32) function |
Date: |
Wed, 18 Aug 2021 23:55:14 +0200 |
The target endianess information is stored in the BigEndian
bit of the Config0 register in CP0.
Replace the GET_LMASK() macro by an inlined get_lmask() function,
passing CPUMIPSState and the word size as argument.
We can remove one use of the TARGET_WORDS_BIGENDIAN definition.
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
target/mips/tcg/ldst_helper.c | 32 +++++++++++++++++++++-----------
1 file changed, 21 insertions(+), 11 deletions(-)
diff --git a/target/mips/tcg/ldst_helper.c b/target/mips/tcg/ldst_helper.c
index 8d1dfea6766..c48a2818681 100644
--- a/target/mips/tcg/ldst_helper.c
+++ b/target/mips/tcg/ldst_helper.c
@@ -57,30 +57,39 @@ static inline bool cpu_is_bigendian(CPUMIPSState *env)
return extract32(env->CP0_Config0, CP0C0_BE, 1);
}
-#ifdef TARGET_WORDS_BIGENDIAN
-#define GET_LMASK(v) ((v) & 3)
-#else
-#define GET_LMASK(v) (((v) & 3) ^ 3)
-#endif
+static inline target_ulong get_lmask(CPUMIPSState *env,
+ target_ulong value, unsigned bits)
+{
+ unsigned mask = (bits / BITS_PER_BYTE) - 1;
+
+ value &= mask;
+
+ if (cpu_is_bigendian(env)) {
+ value ^= mask;
+ }
+
+ return value;
+}
void helper_swl(CPUMIPSState *env, target_ulong arg1, target_ulong arg2,
int mem_idx)
{
+ target_ulong lmask = get_lmask(env, arg2, 32);
int dir = cpu_is_bigendian(env) ? 1 : -1;
cpu_stb_mmuidx_ra(env, arg2, (uint8_t)(arg1 >> 24), mem_idx, GETPC());
- if (GET_LMASK(arg2) <= 2) {
+ if (lmask <= 2) {
cpu_stb_mmuidx_ra(env, arg2 + 1 * dir, (uint8_t)(arg1 >> 16),
mem_idx, GETPC());
}
- if (GET_LMASK(arg2) <= 1) {
+ if (lmask <= 1) {
cpu_stb_mmuidx_ra(env, arg2 + 2 * dir, (uint8_t)(arg1 >> 8),
mem_idx, GETPC());
}
- if (GET_LMASK(arg2) == 0) {
+ if (lmask == 0) {
cpu_stb_mmuidx_ra(env, arg2 + 3 * dir, (uint8_t)arg1,
mem_idx, GETPC());
}
@@ -89,21 +98,22 @@ void helper_swl(CPUMIPSState *env, target_ulong arg1,
target_ulong arg2,
void helper_swr(CPUMIPSState *env, target_ulong arg1, target_ulong arg2,
int mem_idx)
{
+ target_ulong lmask = get_lmask(env, arg2, 32);
int dir = cpu_is_bigendian(env) ? 1 : -1;
cpu_stb_mmuidx_ra(env, arg2, (uint8_t)arg1, mem_idx, GETPC());
- if (GET_LMASK(arg2) >= 1) {
+ if (lmask >= 1) {
cpu_stb_mmuidx_ra(env, arg2 - 1 * dir, (uint8_t)(arg1 >> 8),
mem_idx, GETPC());
}
- if (GET_LMASK(arg2) >= 2) {
+ if (lmask >= 2) {
cpu_stb_mmuidx_ra(env, arg2 - 2 * dir, (uint8_t)(arg1 >> 16),
mem_idx, GETPC());
}
- if (GET_LMASK(arg2) == 3) {
+ if (lmask == 3) {
cpu_stb_mmuidx_ra(env, arg2 - 3 * dir, (uint8_t)(arg1 >> 24),
mem_idx, GETPC());
}
--
2.31.1
- [PATCH v2 0/5] target/mips: Replace TARGET_WORDS_BIGENDIAN by cpu_is_bigendian(), Philippe Mathieu-Daudé, 2021/08/18
- [PATCH v2 1/5] target/mips: Call cpu_is_bigendian & inline GET_OFFSET in ld/st helpers, Philippe Mathieu-Daudé, 2021/08/18
- [PATCH v2 2/5] target/mips: Replace GET_LMASK() macro by get_lmask(32) function,
Philippe Mathieu-Daudé <=
- [PATCH v2 3/5] target/mips: Replace GET_LMASK64() macro by get_lmask(64) function, Philippe Mathieu-Daudé, 2021/08/18
- [PATCH v2 4/5] target/mips: Store CP0_Config0 in DisasContext, Philippe Mathieu-Daudé, 2021/08/18
- [PATCH v2 5/5] target/mips: Replace TARGET_WORDS_BIGENDIAN by cpu_is_bigendian(), Philippe Mathieu-Daudé, 2021/08/18
- Re: [PATCH v2 0/5] target/mips: Replace TARGET_WORDS_BIGENDIAN by cpu_is_bigendian(), Philippe Mathieu-Daudé, 2021/08/21