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target-m68k: use floatx80 internally

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Coldfire uses float64, but 680x0 use floatx80.
This patch introduces the use of floatx80 internally
and enables 680x0 80bits FPU.

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Message-Id: <20170620205121.26515-4-laurent@vivier.eu>
This commit is contained in:
Laurent Vivier 2017-06-20 22:51:18 +02:00
parent f4a6ce5155
commit f83311e476
7 changed files with 509 additions and 291 deletions
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15
target/m68k/cpu.h
View file

@ -55,8 +55,15 @@
#define EXCP_UNINITIALIZED 15
#define EXCP_TRAP0 32 /* User trap #0. */
#define EXCP_TRAP15 47 /* User trap #15. */
#define EXCP_FP_BSUN 48 /* Branch Set on Unordered */
#define EXCP_FP_INEX 49 /* Inexact result */
#define EXCP_FP_DZ 50 /* Divide by Zero */
#define EXCP_FP_UNFL 51 /* Underflow */
#define EXCP_FP_OPERR 52 /* Operand Error */
#define EXCP_FP_OVFL 53 /* Overflow */
#define EXCP_FP_SNAN 54 /* Signaling Not-A-Number */
#define EXCP_FP_UNIMP 55 /* Unimplemented Data type */
#define EXCP_UNSUPPORTED 61
#define EXCP_ICE 13
#define EXCP_RTE 0x100
#define EXCP_HALT_INSN 0x101
@ -64,6 +71,8 @@
#define NB_MMU_MODES 2
#define TARGET_INSN_START_EXTRA_WORDS 1
typedef CPU_LDoubleU FPReg;
typedef struct CPUM68KState {
uint32_t dregs[8];
uint32_t aregs[8];
@ -82,8 +91,8 @@ typedef struct CPUM68KState {
uint32_t cc_c; /* either 0/1, unused, or computed from cc_n and cc_v */
uint32_t cc_z; /* == 0 or unused */
float64 fregs[8];
float64 fp_result;
FPReg fregs[8];
FPReg fp_result;
uint32_t fpcr;
uint32_t fpsr;
float_status fp_status;