185 lines
7.1 KiB
C
185 lines
7.1 KiB
C
#include "qemu/osdep.h"
|
|
#include "qemu/log.h"
|
|
#include "cpu.h"
|
|
#include "exec/exec-all.h"
|
|
#include "qemu/host-utils.h"
|
|
#include "exec/helper-proto.h"
|
|
|
|
#define glue3(x, y, z) glue(glue(x, y), z)
|
|
#define glue4(x, y, z, w) glue(glue3(x, y, z), w)
|
|
#define deref(x) *(x)
|
|
#define no_cvt(x) (x) /* when in correct type */
|
|
|
|
static inline void fpu_set_exception(CPUE2KState *env, int mask)
|
|
{
|
|
env->fpsr.ef |= mask;
|
|
if (env->fpsr.ef & (~env->fpcr.em & FPCR_EM)) {
|
|
env->fpsr.es = 1;
|
|
env->fpsr.b = 1;
|
|
}
|
|
}
|
|
|
|
static inline uint8_t save_exception_flags(CPUE2KState *env)
|
|
{
|
|
uint8_t old_flags = get_float_exception_flags(&env->fp_status);
|
|
set_float_exception_flags(0, &env->fp_status);
|
|
return old_flags;
|
|
}
|
|
|
|
static inline void merge_exception_flags(CPUE2KState *env, uint8_t old_flags)
|
|
{
|
|
uint8_t new_flags = get_float_exception_flags(&env->fp_status);
|
|
float_raise(old_flags, &env->fp_status);
|
|
fpu_set_exception(env,
|
|
((new_flags & float_flag_invalid ? FPSR_IE : 0) |
|
|
(new_flags & float_flag_divbyzero ? FPSR_ZE : 0) |
|
|
(new_flags & float_flag_overflow ? FPSR_OE : 0) |
|
|
(new_flags & float_flag_underflow ? FPSR_UE : 0) |
|
|
(new_flags & float_flag_inexact ? FPSR_PE : 0) |
|
|
(new_flags & float_flag_input_denormal ? FPSR_DE : 0)));
|
|
}
|
|
|
|
void e2k_update_fp_status(CPUE2KState *env)
|
|
{
|
|
int x;
|
|
|
|
switch(env->fpcr.rc) {
|
|
case FPCR_RC_UP:
|
|
x = float_round_up;
|
|
break;
|
|
case FPCR_RC_DOWN:
|
|
x = float_round_down;
|
|
break;
|
|
case FPCR_RC_CHOP:
|
|
x = float_round_to_zero;
|
|
break;
|
|
case FPCR_RC_NEAR:
|
|
x = float_round_nearest_even;
|
|
break;
|
|
default:
|
|
abort();
|
|
break;
|
|
}
|
|
|
|
set_float_rounding_mode(x, &env->fp_status);
|
|
|
|
switch(env->fpcr.pc) {
|
|
case FPCR_PC_XP: x = floatx80_precision_x; break;
|
|
case FPCR_PC_DP: x = floatx80_precision_d; break;
|
|
case FPCR_PC_SP: x = floatx80_precision_s; break;
|
|
case FPCR_PC_RESERVED:
|
|
default:
|
|
abort();
|
|
break;
|
|
}
|
|
|
|
set_floatx80_rounding_precision(x, &env->fp_status);
|
|
|
|
}
|
|
|
|
#define GENERATE_SIMPLE_FLOAT2_OP(name, function, size) \
|
|
uint##size##_t HELPER(name)(CPUE2KState *env, uint##size##_t x, uint##size##_t y) \
|
|
{ \
|
|
uint8_t old_flags = save_exception_flags(env); \
|
|
float##size z = float##size##_##function (make_float##size (x), make_float##size (y), &env->fp_status); \
|
|
merge_exception_flags(env, old_flags); \
|
|
return float##size##_val(z); \
|
|
}
|
|
|
|
#define GENERATE_SIMPLE_FLOAT2_OPS_32_64(name, function) \
|
|
GENERATE_SIMPLE_FLOAT2_OP(glue(name, s), function, 32) \
|
|
GENERATE_SIMPLE_FLOAT2_OP(glue(name, d), function, 64)
|
|
|
|
#define GENERATE_CMP_FLOAT2_OP(ret_type, name, expr, op, in_type, cvt_macro) \
|
|
ret_type HELPER(name)(CPUE2KState *env, in_type x, in_type y) \
|
|
{ \
|
|
uint8_t old_flags = save_exception_flags(env); \
|
|
ret_type z = expr op(cvt_macro(x), cvt_macro(y), &env->fp_status); \
|
|
merge_exception_flags(env, old_flags); \
|
|
return z; \
|
|
}
|
|
|
|
#define GENERATE_CMP_FLOAT2_OPS_32_64_80(name, expr, op) \
|
|
GENERATE_CMP_FLOAT2_OP(uint32_t, glue3(f, name, s), expr, glue(float32_, op), uint32_t, make_float32) \
|
|
GENERATE_CMP_FLOAT2_OP(uint64_t, glue3(f, name, d), expr, glue(float64_, op), uint64_t, make_float32) \
|
|
GENERATE_CMP_FLOAT2_OP(uint64_t, glue3(fx, name, x), expr, glue(floatx80_, op), floatx80*, deref)
|
|
|
|
#define GENERATE_CVT_FLOAT1_OP(name, from_t, to_t, size_from, size_to, func_from, func_to) \
|
|
size_to HELPER(name)(CPUE2KState *env, size_from x) \
|
|
{\
|
|
uint8_t old_flags = save_exception_flags(env); \
|
|
size_to z = func_to( glue3(from_t, _to_, to_t) (func_from(x), &env->fp_status) );\
|
|
merge_exception_flags(env, old_flags); \
|
|
return z; \
|
|
}
|
|
|
|
GENERATE_SIMPLE_FLOAT2_OPS_32_64(fadd, add)
|
|
GENERATE_SIMPLE_FLOAT2_OPS_32_64(fsub, sub)
|
|
GENERATE_SIMPLE_FLOAT2_OPS_32_64(fmin, min)
|
|
GENERATE_SIMPLE_FLOAT2_OPS_32_64(fmax, max)
|
|
GENERATE_SIMPLE_FLOAT2_OPS_32_64(fmul, mul)
|
|
GENERATE_SIMPLE_FLOAT2_OPS_32_64(fdiv, div)
|
|
GENERATE_CMP_FLOAT2_OPS_32_64_80(cmpeq, , eq)
|
|
GENERATE_CMP_FLOAT2_OPS_32_64_80(cmpneq, !, eq)
|
|
GENERATE_CMP_FLOAT2_OPS_32_64_80(cmple, , le)
|
|
GENERATE_CMP_FLOAT2_OPS_32_64_80(cmpnle, !, le)
|
|
GENERATE_CMP_FLOAT2_OPS_32_64_80(cmplt, , lt)
|
|
GENERATE_CMP_FLOAT2_OPS_32_64_80(cmpnlt, !, lt)
|
|
GENERATE_CMP_FLOAT2_OPS_32_64_80(cmpuod, , unordered)
|
|
GENERATE_CMP_FLOAT2_OPS_32_64_80(cmpod, !, unordered)
|
|
|
|
GENERATE_CVT_FLOAT1_OP(fstois, float32, int32, uint32_t, uint32_t, make_float32, no_cvt)
|
|
GENERATE_CVT_FLOAT1_OP(istofs, int32, float32, uint32_t, uint32_t, no_cvt, float32_val)
|
|
GENERATE_CVT_FLOAT1_OP(fstoistr, float32, int32_round_to_zero, uint32_t, uint32_t, make_float32, no_cvt)
|
|
|
|
GENERATE_CVT_FLOAT1_OP(fdtoid, float64, int64, uint64_t, uint64_t, make_float64, no_cvt)
|
|
GENERATE_CVT_FLOAT1_OP(idtofd, int64, float64, uint64_t, uint64_t, no_cvt, float64_val)
|
|
GENERATE_CVT_FLOAT1_OP(fdtoidtr, float64, int64_round_to_zero, uint64_t, uint64_t, make_float64, no_cvt)
|
|
|
|
GENERATE_CVT_FLOAT1_OP(fstofd, float32, float64, uint32_t, uint64_t, make_float32, float64_val)
|
|
GENERATE_CVT_FLOAT1_OP(fstoid, float32, int64, uint32_t, uint64_t, make_float32, no_cvt)
|
|
GENERATE_CVT_FLOAT1_OP(istofd, int32, float64, uint32_t, uint64_t, no_cvt, float64_val)
|
|
GENERATE_CVT_FLOAT1_OP(fstoidtr, float32, int64_round_to_zero, uint32_t, uint64_t, make_float32, no_cvt)
|
|
|
|
GENERATE_CVT_FLOAT1_OP(fdtofs, float64, float32, uint64_t, uint32_t, make_float64, float32_val)
|
|
GENERATE_CVT_FLOAT1_OP(fdtois, float64, int32, uint64_t, uint32_t, make_float64, no_cvt)
|
|
GENERATE_CVT_FLOAT1_OP(idtofs, int64, float32, uint64_t, uint32_t, no_cvt, float32_val)
|
|
GENERATE_CVT_FLOAT1_OP(fdtoistr, float64, int32_round_to_zero, uint64_t, uint32_t, make_float64, no_cvt)
|
|
|
|
GENERATE_CVT_FLOAT1_OP(fxtofs, floatx80, float32, floatx80*, uint32_t, deref, float32_val)
|
|
GENERATE_CVT_FLOAT1_OP(fxtofd, floatx80, float64, floatx80*, uint64_t, deref, float64_val)
|
|
|
|
void HELPER(fstofx)(floatx80 *ret, CPUE2KState *env, uint32_t x)
|
|
{
|
|
uint8_t old_flags = save_exception_flags(env);
|
|
*ret = float32_to_floatx80(make_float32(x), &env->fp_status);
|
|
merge_exception_flags(env, old_flags);
|
|
}
|
|
|
|
void HELPER(fdtofx)(floatx80 *ret, CPUE2KState *env, uint64_t x)
|
|
{
|
|
uint8_t old_flags = save_exception_flags(env);
|
|
*ret = float64_to_floatx80(make_float64(x), &env->fp_status);
|
|
merge_exception_flags(env, old_flags);
|
|
}
|
|
|
|
#define GEN_OP2_XX(name, op) \
|
|
void HELPER(name)(CPUE2KState *env, floatx80 *x, floatx80 *y) \
|
|
{ \
|
|
uint8_t old_flags = save_exception_flags(env); \
|
|
*x = glue(floatx80_, op)(*x, *y, &env->fp_status); \
|
|
merge_exception_flags(env, old_flags); \
|
|
}
|
|
|
|
GEN_OP2_XX(fxaddxx, add)
|
|
GEN_OP2_XX(fxsubxx, sub)
|
|
GEN_OP2_XX(fxmulxx, mul)
|
|
GEN_OP2_XX(fxdivxx, div)
|
|
|
|
void HELPER(fxrsubxx)(CPUE2KState *env, floatx80 *x, floatx80 *y)
|
|
{
|
|
uint8_t old_flags = save_exception_flags(env);
|
|
*x = floatx80_sub(*y, *x, &env->fp_status);
|
|
merge_exception_flags(env, old_flags);
|
|
}
|