From 9e97d8e9418ddd8f26a2aa4dbb80853d3e8af392 Mon Sep 17 00:00:00 2001 From: Aurelien Jarno Date: Sat, 20 Mar 2010 12:27:42 +0100 Subject: tcg/arm: don't save/restore r7 in prologue/epilogue There is no need to save r7, it is used to store the address of the env structure and is not modified by GCC. Signed-off-by: Aurelien Jarno --- tcg/arm/tcg-target.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/tcg/arm/tcg-target.c b/tcg/arm/tcg-target.c index b50bb762a6..1d8debe153 100644 --- a/tcg/arm/tcg-target.c +++ b/tcg/arm/tcg-target.c @@ -1676,15 +1676,15 @@ static inline void tcg_out_movi(TCGContext *s, TCGType type, void tcg_target_qemu_prologue(TCGContext *s) { - /* Theoretically there is no need to save r12, but an - even number of registers to be saved as per EABI */ + /* There is no need to save r7, it is used to store the address + of the env structure and is not modified by GCC. */ - /* stmdb sp!, { r4 - r12, lr } */ - tcg_out32(s, (COND_AL << 28) | 0x092d5ff0); + /* stmdb sp!, { r4 - r6, r8 - r11, lr } */ + tcg_out32(s, (COND_AL << 28) | 0x092d4f70); tcg_out_bx(s, COND_AL, TCG_REG_R0); tb_ret_addr = s->code_ptr; - /* ldmia sp!, { r4 - r12, pc } */ - tcg_out32(s, (COND_AL << 28) | 0x08bd9ff0); + /* ldmia sp!, { r4 - r6, r8 - r11, pc } */ + tcg_out32(s, (COND_AL << 28) | 0x08bd8f70); } -- cgit v1.2.3