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[Qemu-devel] [PATCH 3/4] tcg/i386: Remove unused registers from tcg_targ
From: |
Stefan Weil |
Subject: |
[Qemu-devel] [PATCH 3/4] tcg/i386: Remove unused registers from tcg_target_call_iarg_regs |
Date: |
Thu, 13 Sep 2012 19:37:45 +0200 |
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 <address@hidden>
---
tcg/i386/tcg-target.c | 10 ++--------
1 file changed, 2 insertions(+), 8 deletions(-)
diff --git a/tcg/i386/tcg-target.c b/tcg/i386/tcg-target.c
index ef63967..375d87d 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
};
@@ -127,11 +125,7 @@ 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 */
--
1.7.10
- [Qemu-devel] [PATCH v2 0/4] Fix and clean tcg_target_get_call_iarg_regs_count, Stefan Weil, 2012/09/13
- [Qemu-devel] [PATCH 2/4] tcg/i386: Add shortcuts for registers used in L constraint, Stefan Weil, 2012/09/13
- Re: [Qemu-devel] [PATCH 2/4] tcg/i386: Add shortcuts for registers used in L constraint, Aurelien Jarno, 2012/09/13
- Re: [Qemu-devel] [PATCH 2/4] tcg/i386: Add shortcuts for registers used in L constraint, Richard Henderson, 2012/09/13
- Re: [Qemu-devel] [PATCH 2/4] tcg/i386: Add shortcuts for registers used in L constraint, Aurelien Jarno, 2012/09/13
- Re: [Qemu-devel] [PATCH 2/4] tcg/i386: Add shortcuts for registers used in L constraint, Peter Maydell, 2012/09/13
- Re: [Qemu-devel] [PATCH 2/4] tcg/i386: Add shortcuts for registers used in L constraint, Richard Henderson, 2012/09/13
- Re: [Qemu-devel] [PATCH 2/4] tcg/i386: Add shortcuts for registers used in L constraint, Stefan Weil, 2012/09/14
- Re: [Qemu-devel] [PATCH 2/4] tcg/i386: Add shortcuts for registers used in L constraint, Aurelien Jarno, 2012/09/22
[Qemu-devel] [PATCH 3/4] tcg/i386: Remove unused registers from tcg_target_call_iarg_regs,
Stefan Weil <=
[Qemu-devel] [PATCH 4/4] tcg: Remove tcg_target_get_call_iarg_regs_count, Stefan Weil, 2012/09/13
[Qemu-devel] [PATCH 1/4] w64: Fix TCG helper functions with 5 arguments, Stefan Weil, 2012/09/13
Re: [Qemu-devel] [PATCH v2 0/4] Fix and clean tcg_target_get_call_iarg_regs_count, Richard Henderson, 2012/09/13