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Document the shift values

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4243 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
blueswir1 2008-04-23 17:12:35 +00:00
parent a23a663b65
commit 4b8b8b76d4
2 changed files with 18 additions and 12 deletions
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18
target-sparc/cpu.h
View File

@ -71,10 +71,14 @@
#define TT_TRAP 0x100
#endif
#define PSR_NEG (1<<23)
#define PSR_ZERO (1<<22)
#define PSR_OVF (1<<21)
#define PSR_CARRY (1<<20)
#define PSR_NEG_SHIFT 23
#define PSR_NEG (1 << PSR_NEG_SHIFT)
#define PSR_ZERO_SHIFT 22
#define PSR_ZERO (1 << PSR_ZERO_SHIFT)
#define PSR_OVF_SHIFT 21
#define PSR_OVF (1 << PSR_OVF_SHIFT)
#define PSR_CARRY_SHIFT 20
#define PSR_CARRY (1 << PSR_CARRY_SHIFT)
#define PSR_ICC (PSR_NEG|PSR_ZERO|PSR_OVF|PSR_CARRY)
#define PSR_EF (1<<12)
#define PSR_PIL 0xf00
@ -141,8 +145,10 @@
#define FSR_FTT_SEQ_ERROR (4 << 14)
#define FSR_FTT_INVAL_FPR (6 << 14)
#define FSR_FCC1 (1<<11)
#define FSR_FCC0 (1<<10)
#define FSR_FCC1_SHIFT 11
#define FSR_FCC1 (1 << FSR_FCC1_SHIFT)
#define FSR_FCC0_SHIFT 10
#define FSR_FCC0 (1 << FSR_FCC0_SHIFT)
/* MMU */
#define MMU_E (1<<0)

12
target-sparc/translate.c
View File

@ -266,28 +266,28 @@ static inline void gen_goto_tb(DisasContext *s, int tb_num,
static inline void gen_mov_reg_N(TCGv reg, TCGv src)
{
tcg_gen_extu_i32_tl(reg, src);
tcg_gen_shri_tl(reg, reg, 23);
tcg_gen_shri_tl(reg, reg, PSR_NEG_SHIFT);
tcg_gen_andi_tl(reg, reg, 0x1);
}
static inline void gen_mov_reg_Z(TCGv reg, TCGv src)
{
tcg_gen_extu_i32_tl(reg, src);
tcg_gen_shri_tl(reg, reg, 22);
tcg_gen_shri_tl(reg, reg, PSR_ZERO_SHIFT);
tcg_gen_andi_tl(reg, reg, 0x1);
}
static inline void gen_mov_reg_V(TCGv reg, TCGv src)
{
tcg_gen_extu_i32_tl(reg, src);
tcg_gen_shri_tl(reg, reg, 21);
tcg_gen_shri_tl(reg, reg, PSR_OVF_SHIFT);
tcg_gen_andi_tl(reg, reg, 0x1);
}
static inline void gen_mov_reg_C(TCGv reg, TCGv src)
{
tcg_gen_extu_i32_tl(reg, src);
tcg_gen_shri_tl(reg, reg, 20);
tcg_gen_shri_tl(reg, reg, PSR_CARRY_SHIFT);
tcg_gen_andi_tl(reg, reg, 0x1);
}
@ -965,7 +965,7 @@ static inline void gen_mov_reg_FCC0(TCGv reg, TCGv src,
unsigned int fcc_offset)
{
tcg_gen_extu_i32_tl(reg, src);
tcg_gen_shri_tl(reg, reg, 10 + fcc_offset);
tcg_gen_shri_tl(reg, reg, FSR_FCC0_SHIFT + fcc_offset);
tcg_gen_andi_tl(reg, reg, 0x1);
}
@ -973,7 +973,7 @@ static inline void gen_mov_reg_FCC1(TCGv reg, TCGv src,
unsigned int fcc_offset)
{
tcg_gen_extu_i32_tl(reg, src);
tcg_gen_shri_tl(reg, reg, 11 + fcc_offset);
tcg_gen_shri_tl(reg, reg, FSR_FCC1_SHIFT + fcc_offset);
tcg_gen_andi_tl(reg, reg, 0x1);
}