175 lines
3.0 KiB
C
175 lines
3.0 KiB
C
/*---------------------------------------------------------------------------+
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| fpu_arith.c |
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| Code to implement the FPU register/register arithmetic instructions |
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| Copyright (C) 1992,1993,1997 |
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| W. Metzenthen, 22 Parker St, Ormond, Vic 3163, Australia |
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| E-mail billm@suburbia.net |
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+---------------------------------------------------------------------------*/
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#include "fpu_system.h"
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#include "fpu_emu.h"
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#include "control_w.h"
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#include "status_w.h"
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void fadd__(void)
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{
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/* fadd st,st(i) */
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int i = FPU_rm;
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clear_C1();
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FPU_add(&st(i), FPU_gettagi(i), 0, control_word);
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}
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void fmul__(void)
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{
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/* fmul st,st(i) */
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int i = FPU_rm;
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clear_C1();
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FPU_mul(&st(i), FPU_gettagi(i), 0, control_word);
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}
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void fsub__(void)
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{
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/* fsub st,st(i) */
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clear_C1();
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FPU_sub(0, FPU_rm, control_word);
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}
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void fsubr_(void)
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{
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/* fsubr st,st(i) */
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clear_C1();
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FPU_sub(REV, FPU_rm, control_word);
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}
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void fdiv__(void)
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{
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/* fdiv st,st(i) */
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clear_C1();
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FPU_div(0, FPU_rm, control_word);
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}
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void fdivr_(void)
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{
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/* fdivr st,st(i) */
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clear_C1();
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FPU_div(REV, FPU_rm, control_word);
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}
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void fadd_i(void)
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{
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/* fadd st(i),st */
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int i = FPU_rm;
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clear_C1();
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FPU_add(&st(i), FPU_gettagi(i), i, control_word);
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}
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void fmul_i(void)
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{
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/* fmul st(i),st */
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clear_C1();
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FPU_mul(&st(0), FPU_gettag0(), FPU_rm, control_word);
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}
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void fsubri(void)
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{
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/* fsubr st(i),st */
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clear_C1();
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FPU_sub(DEST_RM, FPU_rm, control_word);
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}
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void fsub_i(void)
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{
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/* fsub st(i),st */
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clear_C1();
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FPU_sub(REV|DEST_RM, FPU_rm, control_word);
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}
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void fdivri(void)
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{
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/* fdivr st(i),st */
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clear_C1();
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FPU_div(DEST_RM, FPU_rm, control_word);
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}
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void fdiv_i(void)
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{
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/* fdiv st(i),st */
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clear_C1();
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FPU_div(REV|DEST_RM, FPU_rm, control_word);
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}
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void faddp_(void)
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{
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/* faddp st(i),st */
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int i = FPU_rm;
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clear_C1();
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if ( FPU_add(&st(i), FPU_gettagi(i), i, control_word) >= 0 )
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FPU_pop();
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}
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void fmulp_(void)
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{
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/* fmulp st(i),st */
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clear_C1();
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if ( FPU_mul(&st(0), FPU_gettag0(), FPU_rm, control_word) >= 0 )
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FPU_pop();
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}
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void fsubrp(void)
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{
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/* fsubrp st(i),st */
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clear_C1();
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if ( FPU_sub(DEST_RM, FPU_rm, control_word) >= 0 )
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FPU_pop();
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}
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void fsubp_(void)
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{
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/* fsubp st(i),st */
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clear_C1();
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if ( FPU_sub(REV|DEST_RM, FPU_rm, control_word) >= 0 )
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FPU_pop();
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}
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void fdivrp(void)
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{
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/* fdivrp st(i),st */
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clear_C1();
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if ( FPU_div(DEST_RM, FPU_rm, control_word) >= 0 )
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FPU_pop();
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}
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void fdivp_(void)
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{
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/* fdivp st(i),st */
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clear_C1();
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if ( FPU_div(REV|DEST_RM, FPU_rm, control_word) >= 0 )
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FPU_pop();
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}
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