From: Stefan Weil Date: Thu, 13 Sep 2012 17:37:45 +0000 (+0200) Subject: tcg/i386: Remove unused registers from tcg_target_call_iarg_regs X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=d73685e3c3936fd7851a32eff5443405cb5368be;p=qemu.git tcg/i386: Remove unused registers from tcg_target_call_iarg_regs 32 bit x86 hosts don't need registers for helper function arguments because they use the default stack based calling convention. Removing the registers allows simpler code for function tcg_target_get_call_iarg_regs_count. Signed-off-by: Stefan Weil Signed-off-by: Aurelien Jarno --- diff --git a/tcg/i386/tcg-target.c b/tcg/i386/tcg-target.c index a87c8ba10c..43c97190aa 100644 --- a/tcg/i386/tcg-target.c +++ b/tcg/i386/tcg-target.c @@ -75,9 +75,7 @@ static const int tcg_target_call_iarg_regs[] = { TCG_REG_R8, TCG_REG_R9, #else - TCG_REG_EAX, - TCG_REG_EDX, - TCG_REG_ECX + /* 32 bit mode uses stack based calling convention (GCC default). */ #endif }; @@ -129,11 +127,7 @@ static void patch_reloc(uint8_t *code_ptr, int type, /* maximum number of register used for input function arguments */ static inline int tcg_target_get_call_iarg_regs_count(int flags) { - if (TCG_TARGET_REG_BITS == 64) { - return ARRAY_SIZE(tcg_target_call_iarg_regs); - } - - return 0; + return ARRAY_SIZE(tcg_target_call_iarg_regs); } /* parse target specific constraints */