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X86: No longer make st7 available as a temporary

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* include/lightning/jit_x86.h, lib/jit_x86-cpu.c,
	lib/jit_x86-x87.c: No longer make st(7) available.
	Need to keep one x87 slots empty to avoid exceptions.
	This has the side effect of no longer needing the
	hackish emms instruction before a function call.
This commit is contained in:
pcpa 2015-02-17 13:55:01 -02:00
parent 2597bf3c13
commit 9f72e66116
4 changed files with 10 additions and 8 deletions
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5
include/lightning/jit_x86.h
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@ -27,7 +27,7 @@
* Types
*/
#define jit_sse2_p() jit_cpu.sse2
#define jit_x87_reg_p(reg) ((reg) >= _ST0 && (reg) <= _ST7)
#define jit_x87_reg_p(reg) ((reg) >= _ST0 && (reg) <= _ST6)
#if __WORDSIZE == 32
# if defined(__x86_64__)
# define __X64_32 1
@ -64,7 +64,6 @@ typedef enum {
# define JIT_F4 (jit_sse2_p() ? _XMM4 : _ST4)
# define JIT_F5 (jit_sse2_p() ? _XMM5 : _ST5)
# define JIT_F6 (jit_sse2_p() ? _XMM6 : _ST6)
# define JIT_F7 (jit_sse2_p() ? _XMM7 : _ST7)
_XMM0, _XMM1, _XMM2, _XMM3, _XMM4, _XMM5, _XMM6, _XMM7,
# define jit_sse_reg_p(reg) ((reg) >= _XMM0 && (reg) <= _XMM7)
#else
@ -148,7 +147,7 @@ typedef enum {
# define jit_sse_reg_p(reg) ((reg) >= _XMM8 && (reg) <= _XMM0)
# endif
#endif
_ST0, _ST1, _ST2, _ST3, _ST4, _ST5, _ST6, _ST7,
_ST0, _ST1, _ST2, _ST3, _ST4, _ST5, _ST6,
# define JIT_NOREG _NOREG
_NOREG,
} jit_reg_t;