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target/sparc: Split fcc out of env->fsr

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Represent each fcc field separately from the rest of fsr.
This vastly simplifies floating-point comparisons.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Acked-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Message-Id: <20231103173841.33651-22-richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2023-11-03 10:38:40 -07:00
parent c9fa8e586b
commit d8c5b92f3f
4 changed files with 201 additions and 525 deletions
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20
target/sparc/cpu.h
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@ -31,8 +31,10 @@
#if !defined(TARGET_SPARC64)
#define TARGET_DPREGS 16
#define TARGET_FCCREGS 1
#else
#define TARGET_DPREGS 32
#define TARGET_FCCREGS 4
#endif
/*#define EXCP_INTERRUPT 0x100*/
@ -203,24 +205,19 @@ enum {
#ifdef TARGET_SPARC64
#define FSR_FTT_NMASK 0xfffffffffffe3fffULL
#define FSR_FTT_CEXC_NMASK 0xfffffffffffe3fe0ULL
#define FSR_LDFSR_OLDMASK 0x0000003f000fc000ULL
#define FSR_LDXFSR_MASK 0x0000003fcfc00fffULL
#define FSR_LDXFSR_OLDMASK 0x00000000000fc000ULL
#else
#define FSR_FTT_NMASK 0xfffe3fffULL
#define FSR_FTT_CEXC_NMASK 0xfffe3fe0ULL
#define FSR_LDFSR_OLDMASK 0x000fc000ULL
#endif
#define FSR_LDFSR_MASK 0xcfc00fffULL
#define FSR_FTT_IEEE_EXCP (1ULL << 14)
#define FSR_FTT_UNIMPFPOP (3ULL << 14)
#define FSR_FTT_SEQ_ERROR (4ULL << 14)
#define FSR_FTT_INVAL_FPR (6ULL << 14)
#define FSR_FCC1_SHIFT 11
#define FSR_FCC1 (1ULL << FSR_FCC1_SHIFT)
#define FSR_FCC0_SHIFT 10
#define FSR_FCC0 (1ULL << FSR_FCC0_SHIFT)
#define FSR_FCC0_SHIFT 10
#define FSR_FCC1_SHIFT 32
#define FSR_FCC2_SHIFT 34
#define FSR_FCC3_SHIFT 36
/* MMU */
#define MMU_E (1<<0)
@ -467,8 +464,9 @@ struct CPUArchState {
temporary register when possible) */
/* FPU State Register, in parts */
target_ulong fsr; /* rm, tem, aexc, fcc* */
uint32_t fsr_cexc_ftt; /* cexc, ftt */
uint32_t fsr; /* rm, tem, aexc */
uint32_t fsr_cexc_ftt; /* cexc, ftt */
uint32_t fcc[TARGET_FCCREGS]; /* fcc* */
CPU_DoubleU fpr[TARGET_DPREGS]; /* floating point registers */
uint32_t cwp; /* index of current register window (extracted