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[Qemu-devel] [PATCH 38/62] tcg-s390: Tidy regset initialization; use R14
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PATCH 38/62] tcg-s390: Tidy regset initialization; use R14 as temporary. |
Date: |
Thu, 27 May 2010 13:46:20 -0700 |
Signed-off-by: Richard Henderson <address@hidden>
---
tcg/s390/tcg-target.c | 26 ++++++++++++--------------
1 files changed, 12 insertions(+), 14 deletions(-)
diff --git a/tcg/s390/tcg-target.c b/tcg/s390/tcg-target.c
index ee2e879..a26c963 100644
--- a/tcg/s390/tcg-target.c
+++ b/tcg/s390/tcg-target.c
@@ -36,7 +36,7 @@
#define TCG_CT_CONST_S32 0x100
#define TCG_CT_CONST_N32 0x200
-#define TCG_TMP0 TCG_REG_R13
+#define TCG_TMP0 TCG_REG_R14
/* All of the following instructions are prefixed with their instruction
@@ -1630,24 +1630,22 @@ void tcg_target_init(TCGContext *s)
tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I32], 0, 0xffff);
tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I64], 0, 0xffff);
- tcg_regset_set32(tcg_target_call_clobber_regs, 0,
- (1 << TCG_REG_R0) |
- (1 << TCG_REG_R1) |
- (1 << TCG_REG_R2) |
- (1 << TCG_REG_R3) |
- (1 << TCG_REG_R4) |
- (1 << TCG_REG_R5) |
- (1 << TCG_REG_R14)); /* link register */
+
+ tcg_regset_clear(tcg_target_call_clobber_regs);
+ tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R0);
+ tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R1);
+ tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R2);
+ tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R3);
+ tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R4);
+ tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R5);
+ /* The return register can be considered call-clobbered. */
+ tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R14);
tcg_regset_clear(s->reserved_regs);
- /* frequently used as a temporary */
tcg_regset_set_reg(s->reserved_regs, TCG_TMP0);
- /* another temporary */
- tcg_regset_set_reg(s->reserved_regs, TCG_REG_R12);
/* XXX many insns can't be used with R0, so we better avoid it for now */
tcg_regset_set_reg(s->reserved_regs, TCG_REG_R0);
- /* The stack pointer. */
- tcg_regset_set_reg(s->reserved_regs, TCG_REG_R15);
+ tcg_regset_set_reg(s->reserved_regs, TCG_REG_CALL_STACK);
tcg_add_target_add_op_defs(s390_op_defs);
}
--
1.7.0.1
- [Qemu-devel] [PATCH 27/62] tcg-s390: Implement bswap operations., (continued)
- [Qemu-devel] [PATCH 27/62] tcg-s390: Implement bswap operations., Richard Henderson, 2010/05/27
- [Qemu-devel] [PATCH 28/62] tcg-s390: Implement rotates., Richard Henderson, 2010/05/27
- [Qemu-devel] [PATCH 29/62] tcg-s390: Use LOAD COMPLIMENT for negate., Richard Henderson, 2010/05/27
- [Qemu-devel] [PATCH 30/62] tcg-s390: Tidy unimplemented opcodes., Richard Henderson, 2010/05/27
- [Qemu-devel] [PATCH 31/62] tcg-s390: Use the extended-immediate facility for add/sub., Richard Henderson, 2010/05/27
- [Qemu-devel] [PATCH 32/62] tcg-s390: Implement immediate ANDs., Richard Henderson, 2010/05/27
- [Qemu-devel] [PATCH 33/62] tcg-s390: Implement immediate ORs., Richard Henderson, 2010/05/27
- [Qemu-devel] [PATCH 34/62] tcg-s390: Implement immediate MULs., Richard Henderson, 2010/05/27
- [Qemu-devel] [PATCH 35/62] tcg-s390: Implement immediate XORs., Richard Henderson, 2010/05/27
- [Qemu-devel] [PATCH 37/62] tcg-s390: Define TCG_TMP0., Richard Henderson, 2010/05/27
- [Qemu-devel] [PATCH 38/62] tcg-s390: Tidy regset initialization; use R14 as temporary.,
Richard Henderson <=
- [Qemu-devel] [PATCH 39/62] tcg-s390: Rearrange register allocation order., Richard Henderson, 2010/05/27
- [Qemu-devel] [PATCH 36/62] tcg-s390: Icache flush is a no-op., Richard Henderson, 2010/05/27
- [Qemu-devel] [PATCH 40/62] tcg-s390: Tidy goto_tb., Richard Henderson, 2010/05/27
- [Qemu-devel] [PATCH 41/62] tcg-s390: Allocate the code_gen_buffer near the main program., Richard Henderson, 2010/05/27
- [Qemu-devel] [PATCH 42/62] tcg-s390: Rearrange qemu_ld/st to avoid register copy., Richard Henderson, 2010/05/27
- [Qemu-devel] [PATCH 44/62] tcg-s390: Tidy user qemu_ld/st., Richard Henderson, 2010/05/27
- [Qemu-devel] [PATCH 45/62] tcg-s390: Implement GUEST_BASE., Richard Henderson, 2010/05/27
- [Qemu-devel] [PATCH 43/62] tcg-s390: Tidy tcg_prepare_qemu_ldst., Richard Henderson, 2010/05/27
- [Qemu-devel] [PATCH 47/62] tcg-s390: Conditionalize general-instruction-extension insns., Richard Henderson, 2010/05/27
- [Qemu-devel] [PATCH 48/62] tcg-s390: Conditionalize ADD IMMEDIATE instructions., Richard Henderson, 2010/05/27