116 lines
3.9 KiB
C
116 lines
3.9 KiB
C
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#include "qemu/osdep.h"
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#include "qemu/log.h"
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#include "cpu.h"
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#include "exec/exec-all.h"
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#include "qemu/host-utils.h"
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#include "exec/helper-proto.h"
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static inline void fpu_set_exception(CPUE2KState *env, int mask)
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{
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env->fpsr.ef |= mask;
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if (env->fpsr.ef & (~env->fpcr.em & FPCR_EM)) {
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env->fpsr.es = 1;
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env->fpsr.b = 1;
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}
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}
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static inline uint8_t save_exception_flags(CPUE2KState *env)
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{
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uint8_t old_flags = get_float_exception_flags(&env->fp_status);
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set_float_exception_flags(0, &env->fp_status);
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return old_flags;
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}
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static inline void merge_exception_flags(CPUE2KState *env, uint8_t old_flags)
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{
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uint8_t new_flags = get_float_exception_flags(&env->fp_status);
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float_raise(old_flags, &env->fp_status);
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fpu_set_exception(env,
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((new_flags & float_flag_invalid ? FPSR_IE : 0) |
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(new_flags & float_flag_divbyzero ? FPSR_ZE : 0) |
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(new_flags & float_flag_overflow ? FPSR_OE : 0) |
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(new_flags & float_flag_underflow ? FPSR_UE : 0) |
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(new_flags & float_flag_inexact ? FPSR_PE : 0) |
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(new_flags & float_flag_input_denormal ? FPSR_DE : 0)));
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}
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void e2k_update_fp_status(CPUE2KState *env)
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{
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int x;
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switch(env->fpcr.rc) {
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case FPCR_RC_UP:
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x = float_round_up;
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break;
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case FPCR_RC_DOWN:
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x = float_round_down;
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break;
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case FPCR_RC_CHOP:
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x = float_round_to_zero;
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break;
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case FPCR_RC_NEAR:
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x = float_round_nearest_even;
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break;
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default:
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abort();
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break;
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}
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set_float_rounding_mode(x, &env->fp_status);
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switch(env->fpcr.pc) {
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case FPCR_PC_XP: x = floatx80_precision_x; break;
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case FPCR_PC_DP: x = floatx80_precision_d; break;
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case FPCR_PC_SP: x = floatx80_precision_s; break;
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case FPCR_PC_RESERVED:
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default:
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abort();
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break;
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}
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set_floatx80_rounding_precision(x, &env->fp_status);
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}
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#define GENERATE_SIMPLE_FLOAT2_OP(name, function, size) \
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uint##size##_t HELPER(name)(CPUE2KState *env, uint##size##_t x, uint##size##_t y) \
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{ \
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uint8_t old_flags = save_exception_flags(env); \
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float##size z = float##size##_##function (make_float##size (x), make_float##size (y), &env->fp_status); \
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merge_exception_flags(env, old_flags); \
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return float##size##_val(z); \
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}
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#define GENERATE_CMP_FLOAT2_OP(name, function, expr, size) \
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uint##size##_t HELPER(name)(CPUE2KState *env, uint##size##_t x, uint##size##_t y) \
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{ \
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uint8_t old_flags = save_exception_flags(env); \
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uint##size##_t z = expr float##size##_##function (make_float##size (x), make_float##size (y), &env->fp_status); \
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merge_exception_flags(env, old_flags); \
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return z; \
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}
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#define GENERATE_SIMPLE_FLOAT2_OPS_32_64(name, function) \
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GENERATE_SIMPLE_FLOAT2_OP(name##s, function, 32) \
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GENERATE_SIMPLE_FLOAT2_OP(name##d, function, 64)
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#define GENERATE_CMP_FLOAT2_OPS_32_64(name, function, expr) \
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GENERATE_CMP_FLOAT2_OP(name##s, function, 32) \
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GENERATE_CMP_FLOAT2_OP(name##d, function, 64)
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GENERATE_SIMPLE_FLOAT2_OPS_32_64(fadd, add)
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GENERATE_SIMPLE_FLOAT2_OPS_32_64(fsub, sub)
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GENERATE_SIMPLE_FLOAT2_OPS_32_64(fmin, min)
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GENERATE_SIMPLE_FLOAT2_OPS_32_64(fmax, max)
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GENERATE_SIMPLE_FLOAT2_OPS_32_64(fmul, mul)
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GENERATE_SIMPLE_FLOAT2_OPS_32_64(fdiv, div)
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GENERATE_CMP_FLOAT2_OPS_32_64(fcmpeq, eq, )
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GENERATE_CMP_FLOAT2_OPS_32_64(fcmpneq, eq, !)
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GENERATE_CMP_FLOAT2_OPS_32_64(fcmple, le, )
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GENERATE_CMP_FLOAT2_OPS_32_64(fcmpnle, le, !)
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GENERATE_CMP_FLOAT2_OPS_32_64(fcmplt, lt, )
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GENERATE_CMP_FLOAT2_OPS_32_64(fcmpnlt, lt, !)
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GENERATE_CMP_FLOAT2_OPS_32_64(fcmpuod, unordered, )
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GENERATE_CMP_FLOAT2_OPS_32_64(fcmpod, unordered, !)
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