From patchwork Wed Apr 7 17:51:09 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [02/18] tcg/arm: explicitely list clobbered/reserved regs From: Aurelien Jarno X-Patchwork-Id: 49617 Message-Id: <1270662685-7379-3-git-send-email-aurelien@aurel32.net> To: qemu-devel@nongnu.org Cc: Andrzej Zaborowski , Aurelien Jarno Date: Wed, 7 Apr 2010 19:51:09 +0200 Instead of writing very compact code, declare all registers that are clobbered or reserved one by one. This makes the code easier to read. Also declare all the 16 registers to TCG, and mark pc as reserved. Signed-off-by: Aurelien Jarno --- tcg/arm/tcg-target.c | 13 +++++++++---- tcg/arm/tcg-target.h | 3 ++- 2 files changed, 11 insertions(+), 5 deletions(-) diff --git a/tcg/arm/tcg-target.c b/tcg/arm/tcg-target.c index e86ed9a..35f6c47 100644 --- a/tcg/arm/tcg-target.c +++ b/tcg/arm/tcg-target.c @@ -39,6 +39,7 @@ static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = { "%r12", "%r13", "%r14", + "%pc", }; #endif @@ -1580,15 +1581,19 @@ void tcg_target_init(TCGContext *s) tcg_abort(); #endif - tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I32], 0, - ((2 << TCG_REG_R14) - 1) & ~(1 << TCG_REG_R8)); + tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I32], 0, 0xffff); tcg_regset_set32(tcg_target_call_clobber_regs, 0, - ((2 << TCG_REG_R3) - 1) | - (1 << TCG_REG_R12) | (1 << TCG_REG_R14)); + (1 << TCG_REG_R0) | + (1 << TCG_REG_R1) | + (1 << TCG_REG_R2) | + (1 << TCG_REG_R3) | + (1 << TCG_REG_R12) | + (1 << TCG_REG_R14)); tcg_regset_clear(s->reserved_regs); tcg_regset_set_reg(s->reserved_regs, TCG_REG_CALL_STACK); tcg_regset_set_reg(s->reserved_regs, TCG_REG_R8); + tcg_regset_set_reg(s->reserved_regs, TCG_REG_PC); tcg_add_target_add_op_defs(arm_op_defs); } diff --git a/tcg/arm/tcg-target.h b/tcg/arm/tcg-target.h index 6d58de8..a0027b5 100644 --- a/tcg/arm/tcg-target.h +++ b/tcg/arm/tcg-target.h @@ -44,9 +44,10 @@ enum { TCG_REG_R12, TCG_REG_R13, TCG_REG_R14, + TCG_REG_PC, }; -#define TCG_TARGET_NB_REGS 15 +#define TCG_TARGET_NB_REGS 16 #define TCG_CT_CONST_ARM 0x100