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[10/14] target/sh4: optimize gen_write_sr using extract op

Message ID 20170501221046.9369-11-aurelien@aurel32.net (mailing list archive)
State New, archived
Headers show

Commit Message

Aurelien Jarno May 1, 2017, 10:10 p.m. UTC 
This doesn't change the generated code on x86, but optimizes it on most
RISC architectures and makes the code simpler to read.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
---
 target/sh4/translate.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)
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Patch

diff --git a/target/sh4/translate.c b/target/sh4/translate.c
index 23636eeb4c..7de459c9a5 100644
--- a/target/sh4/translate.c
+++ b/target/sh4/translate.c
@@ -204,12 +204,9 @@  static void gen_write_sr(TCGv src)
 {
     tcg_gen_andi_i32(cpu_sr, src,
                      ~((1u << SR_Q) | (1u << SR_M) | (1u << SR_T)));
-    tcg_gen_shri_i32(cpu_sr_q, src, SR_Q);
-    tcg_gen_andi_i32(cpu_sr_q, cpu_sr_q, 1);
-    tcg_gen_shri_i32(cpu_sr_m, src, SR_M);
-    tcg_gen_andi_i32(cpu_sr_m, cpu_sr_m, 1);
-    tcg_gen_shri_i32(cpu_sr_t, src, SR_T);
-    tcg_gen_andi_i32(cpu_sr_t, cpu_sr_t, 1);
+    tcg_gen_extract_i32(cpu_sr_q, src, SR_Q, 1);
+    tcg_gen_extract_i32(cpu_sr_m, src, SR_M, 1);
+    tcg_gen_extract_i32(cpu_sr_t, src, SR_T, 1);
 }
 
 static inline void gen_save_cpu_state(DisasContext *ctx, bool save_pc)