diff mbox series

[v2,1/5] target/mips: Call cpu_is_bigendian & inline GET_OFFSET in ld/st helpers

Message ID 20210818215517.2560994-2-f4bug@amsat.org
State New
Headers show
Series target/mips: Replace TARGET_WORDS_BIGENDIAN by cpu_is_bigendian() | expand

Commit Message

Philippe Mathieu-Daudé Aug. 18, 2021, 9:55 p.m. UTC 
The target endianess information is stored in the BigEndian
bit of the Config0 register in CP0.

As a first step, inline the GET_OFFSET() macro, calling
cpu_is_bigendian() to get the 'direction' of the offset.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 target/mips/tcg/ldst_helper.c | 55 +++++++++++++++++++++--------------
 1 file changed, 33 insertions(+), 22 deletions(-)

Comments

Richard Henderson Aug. 18, 2021, 10:34 p.m. UTC | #1 
On 8/18/21 11:55 AM, Philippe Mathieu-Daudé wrote:
> The target endianess information is stored in the BigEndian
> bit of the Config0 register in CP0.
> 
> As a first step, inline the GET_OFFSET() macro, calling
> cpu_is_bigendian() to get the 'direction' of the offset.
> 
> Signed-off-by: Philippe Mathieu-Daudé<f4bug@amsat.org>
> ---
>   target/mips/tcg/ldst_helper.c | 55 +++++++++++++++++++++--------------
>   1 file changed, 33 insertions(+), 22 deletions(-)

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

r~
diff mbox series

Patch

diff --git a/target/mips/tcg/ldst_helper.c b/target/mips/tcg/ldst_helper.c
index d42812b8a6a..8d1dfea6766 100644
--- a/target/mips/tcg/ldst_helper.c
+++ b/target/mips/tcg/ldst_helper.c
@@ -52,31 +52,36 @@  HELPER_LD_ATOMIC(lld, ldq, 0x7, (target_ulong))
 
 #endif /* !CONFIG_USER_ONLY */
 
+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)
-#define GET_OFFSET(addr, offset) (addr + (offset))
 #else
 #define GET_LMASK(v) (((v) & 3) ^ 3)
-#define GET_OFFSET(addr, offset) (addr - (offset))
 #endif
 
 void helper_swl(CPUMIPSState *env, target_ulong arg1, target_ulong arg2,
                 int mem_idx)
 {
+    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) {
-        cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, 1), (uint8_t)(arg1 >> 16),
+        cpu_stb_mmuidx_ra(env, arg2 + 1 * dir, (uint8_t)(arg1 >> 16),
                           mem_idx, GETPC());
     }
 
     if (GET_LMASK(arg2) <= 1) {
-        cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, 2), (uint8_t)(arg1 >> 8),
+        cpu_stb_mmuidx_ra(env, arg2 + 2 * dir, (uint8_t)(arg1 >> 8),
                           mem_idx, GETPC());
     }
 
     if (GET_LMASK(arg2) == 0) {
-        cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, 3), (uint8_t)arg1,
+        cpu_stb_mmuidx_ra(env, arg2 + 3 * dir, (uint8_t)arg1,
                           mem_idx, GETPC());
     }
 }
@@ -84,20 +89,22 @@  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)
 {
+    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) {
-        cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, -1), (uint8_t)(arg1 >> 8),
+        cpu_stb_mmuidx_ra(env, arg2 - 1 * dir, (uint8_t)(arg1 >> 8),
                           mem_idx, GETPC());
     }
 
     if (GET_LMASK(arg2) >= 2) {
-        cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, -2), (uint8_t)(arg1 >> 16),
+        cpu_stb_mmuidx_ra(env, arg2 - 2 * dir, (uint8_t)(arg1 >> 16),
                           mem_idx, GETPC());
     }
 
     if (GET_LMASK(arg2) == 3) {
-        cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, -3), (uint8_t)(arg1 >> 24),
+        cpu_stb_mmuidx_ra(env, arg2 - 3 * dir, (uint8_t)(arg1 >> 24),
                           mem_idx, GETPC());
     }
 }
@@ -116,40 +123,42 @@  void helper_swr(CPUMIPSState *env, target_ulong arg1, target_ulong arg2,
 void helper_sdl(CPUMIPSState *env, target_ulong arg1, target_ulong arg2,
                 int mem_idx)
 {
+    int dir = cpu_is_bigendian(env) ? 1 : -1;
+
     cpu_stb_mmuidx_ra(env, arg2, (uint8_t)(arg1 >> 56), mem_idx, GETPC());
 
     if (GET_LMASK64(arg2) <= 6) {
-        cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, 1), (uint8_t)(arg1 >> 48),
+        cpu_stb_mmuidx_ra(env, arg2 + 1 * dir, (uint8_t)(arg1 >> 48),
                           mem_idx, GETPC());
     }
 
     if (GET_LMASK64(arg2) <= 5) {
-        cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, 2), (uint8_t)(arg1 >> 40),
+        cpu_stb_mmuidx_ra(env, arg2 + 2 * dir, (uint8_t)(arg1 >> 40),
                           mem_idx, GETPC());
     }
 
     if (GET_LMASK64(arg2) <= 4) {
-        cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, 3), (uint8_t)(arg1 >> 32),
+        cpu_stb_mmuidx_ra(env, arg2 + 3 * dir, (uint8_t)(arg1 >> 32),
                           mem_idx, GETPC());
     }
 
     if (GET_LMASK64(arg2) <= 3) {
-        cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, 4), (uint8_t)(arg1 >> 24),
+        cpu_stb_mmuidx_ra(env, arg2 + 4 * dir, (uint8_t)(arg1 >> 24),
                           mem_idx, GETPC());
     }
 
     if (GET_LMASK64(arg2) <= 2) {
-        cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, 5), (uint8_t)(arg1 >> 16),
+        cpu_stb_mmuidx_ra(env, arg2 + 5 * dir, (uint8_t)(arg1 >> 16),
                           mem_idx, GETPC());
     }
 
     if (GET_LMASK64(arg2) <= 1) {
-        cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, 6), (uint8_t)(arg1 >> 8),
+        cpu_stb_mmuidx_ra(env, arg2 + 6 * dir, (uint8_t)(arg1 >> 8),
                           mem_idx, GETPC());
     }
 
     if (GET_LMASK64(arg2) <= 0) {
-        cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, 7), (uint8_t)arg1,
+        cpu_stb_mmuidx_ra(env, arg2 + 7 * dir, (uint8_t)arg1,
                           mem_idx, GETPC());
     }
 }
@@ -157,40 +166,42 @@  void helper_sdl(CPUMIPSState *env, target_ulong arg1, target_ulong arg2,
 void helper_sdr(CPUMIPSState *env, target_ulong arg1, target_ulong arg2,
                 int mem_idx)
 {
+    int dir = cpu_is_bigendian(env) ? 1 : -1;
+
     cpu_stb_mmuidx_ra(env, arg2, (uint8_t)arg1, mem_idx, GETPC());
 
     if (GET_LMASK64(arg2) >= 1) {
-        cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, -1), (uint8_t)(arg1 >> 8),
+        cpu_stb_mmuidx_ra(env, arg2 - 1 * dir, (uint8_t)(arg1 >> 8),
                           mem_idx, GETPC());
     }
 
     if (GET_LMASK64(arg2) >= 2) {
-        cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, -2), (uint8_t)(arg1 >> 16),
+        cpu_stb_mmuidx_ra(env, arg2 - 2 * dir, (uint8_t)(arg1 >> 16),
                           mem_idx, GETPC());
     }
 
     if (GET_LMASK64(arg2) >= 3) {
-        cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, -3), (uint8_t)(arg1 >> 24),
+        cpu_stb_mmuidx_ra(env, arg2 - 3 * dir, (uint8_t)(arg1 >> 24),
                           mem_idx, GETPC());
     }
 
     if (GET_LMASK64(arg2) >= 4) {
-        cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, -4), (uint8_t)(arg1 >> 32),
+        cpu_stb_mmuidx_ra(env, arg2 - 4 * dir, (uint8_t)(arg1 >> 32),
                           mem_idx, GETPC());
     }
 
     if (GET_LMASK64(arg2) >= 5) {
-        cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, -5), (uint8_t)(arg1 >> 40),
+        cpu_stb_mmuidx_ra(env, arg2 - 5 * dir, (uint8_t)(arg1 >> 40),
                           mem_idx, GETPC());
     }
 
     if (GET_LMASK64(arg2) >= 6) {
-        cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, -6), (uint8_t)(arg1 >> 48),
+        cpu_stb_mmuidx_ra(env, arg2 - 6 * dir, (uint8_t)(arg1 >> 48),
                           mem_idx, GETPC());
     }
 
     if (GET_LMASK64(arg2) == 7) {
-        cpu_stb_mmuidx_ra(env, GET_OFFSET(arg2, -7), (uint8_t)(arg1 >> 56),
+        cpu_stb_mmuidx_ra(env, arg2 - 7 * dir, (uint8_t)(arg1 >> 56),
                           mem_idx, GETPC());
     }
 }