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XMM registers are not preserved across function calls, and should be flushed & discarded by the recompiler prior to calling external functions. Fixes graphics issues in some games (eg World Cup 98 title/menus).

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This commit is contained in:
SarahW 2019-05-05 14:49:10 +01:00
commit 5e35e48ec7
7 changed files with 135 additions and 98 deletions
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18
src/codegen_backend.h
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@ -1,3 +1,6 @@
#ifndef _CODEGEN_BACKEND_H_
#define _CODEGEN_BACKEND_H_
//#ifdef __amd64__
//#include "codegen_x86-64.h"
#if defined __amd64__
@ -25,5 +28,16 @@ typedef int (*uOpFn)(codeblock_t *codeblock, struct uop_t *uop);
extern const uOpFn uop_handlers[];
extern int codegen_host_reg_list[CODEGEN_HOST_REGS];
extern int codegen_host_fp_reg_list[CODEGEN_HOST_FP_REGS];
/*Register will not be preserved across function calls*/
#define HOST_REG_FLAG_VOLATILE (1 << 0)
typedef struct host_reg_def_t
{
int reg;
int flags;
} host_reg_def_t;
extern host_reg_def_t codegen_host_reg_list[CODEGEN_HOST_REGS];
extern host_reg_def_t codegen_host_fp_reg_list[CODEGEN_HOST_FP_REGS];
#endif