From: Juha Riihimäki <juha.riihim...@nokia.com>
VFP load/store multiple instructions can be slightly optimized by
loading the register offset constant into a variable outside the
register loop and using the preloaded variable inside the loop instead
of reloading the offset value to a temporary variable on each loop
iteration. This causes less TCG ops to be generated for a VFP load/
store multiple instruction if there are more than one register
accessed, otherwise the amount of generated TCG ops is the same.
Signed-off-by: Juha Riihimäki <juha.riihim...@nokia.com>
---
target-arm/translate.c | 4 +++-
1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/target-arm/translate.c b/target-arm/translate.c
index 8cb1c0f..38fb833 100644
--- a/target-arm/translate.c
+++ b/target-arm/translate.c
@@ -3222,6 +3222,7 @@ static int disas_vfp_insn(CPUState * env, DisasContext
*s, uint32_t insn)
offset = 8;
else
offset = 4;
+ tmp = tcg_const_i32(offset);
for (i = 0; i < n; i++) {
if (insn & ARM_CP_RW_BIT) {
/* load */
@@ -3232,8 +3233,9 @@ static int disas_vfp_insn(CPUState * env, DisasContext
*s, uint32_t insn)
gen_mov_F0_vreg(dp, rd + i);
gen_vfp_st(s, dp, addr);
}
- tcg_gen_addi_i32(addr, addr, offset);
+ tcg_gen_add_i32(addr, addr, tmp);
}
+ tcg_temp_free_i32(tmp);
if (insn & (1 << 21)) {
/* writeback */
if (insn & (1 << 24))
--
1.6.5
