179 lines
3.6 KiB
C
179 lines
3.6 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 |
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| W. Metzenthen, 22 Parker St, Ormond, Vic 3163, |
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| Australia. E-mail billm@vaxc.cc.monash.edu.au |
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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__()
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{
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/* fadd st,st(i) */
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clear_C1();
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reg_add(FPU_st0_ptr, &st(FPU_rm), FPU_st0_ptr, control_word);
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}
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void fmul__()
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{
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/* fmul st,st(i) */
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clear_C1();
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reg_mul(FPU_st0_ptr, &st(FPU_rm), FPU_st0_ptr, control_word);
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}
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void fsub__()
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{
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/* fsub st,st(i) */
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clear_C1();
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reg_sub(FPU_st0_ptr, &st(FPU_rm), FPU_st0_ptr, control_word);
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}
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void fsubr_()
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{
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/* fsubr st,st(i) */
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clear_C1();
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reg_sub(&st(FPU_rm), FPU_st0_ptr, FPU_st0_ptr, control_word);
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}
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void fdiv__()
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{
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/* fdiv st,st(i) */
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clear_C1();
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reg_div(FPU_st0_ptr, &st(FPU_rm), FPU_st0_ptr, control_word);
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}
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void fdivr_()
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{
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/* fdivr st,st(i) */
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clear_C1();
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reg_div(&st(FPU_rm), FPU_st0_ptr, FPU_st0_ptr, control_word);
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}
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void fadd_i()
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{
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/* fadd st(i),st */
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clear_C1();
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reg_add(FPU_st0_ptr, &st(FPU_rm), &st(FPU_rm), control_word);
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}
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void fmul_i()
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{
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/* fmul st(i),st */
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clear_C1();
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reg_mul(FPU_st0_ptr, &st(FPU_rm), &st(FPU_rm), control_word);
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}
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void fsubri()
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{
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/* fsubr st(i),st */
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/* This is the sense of the 80486 manual
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reg_sub(&st(FPU_rm), FPU_st0_ptr, &st(FPU_rm), control_word); */
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clear_C1();
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reg_sub(FPU_st0_ptr, &st(FPU_rm), &st(FPU_rm), control_word);
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}
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void fsub_i()
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{
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/* fsub st(i),st */
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/* This is the sense of the 80486 manual
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reg_sub(FPU_st0_ptr, &st(FPU_rm), &st(FPU_rm), control_word); */
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clear_C1();
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reg_sub(&st(FPU_rm), FPU_st0_ptr, &st(FPU_rm), control_word);
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}
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void fdivri()
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{
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/* fdivr st(i),st */
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clear_C1();
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reg_div(FPU_st0_ptr, &st(FPU_rm), &st(FPU_rm), control_word);
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}
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void fdiv_i()
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{
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/* fdiv st(i),st */
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clear_C1();
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reg_div(&st(FPU_rm), FPU_st0_ptr, &st(FPU_rm), control_word);
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}
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void faddp_()
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{
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/* faddp st(i),st */
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clear_C1();
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if ( !reg_add(FPU_st0_ptr, &st(FPU_rm), &st(FPU_rm), control_word) )
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pop();
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}
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void fmulp_()
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{
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/* fmulp st(i),st */
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clear_C1();
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if ( !reg_mul(FPU_st0_ptr, &st(FPU_rm), &st(FPU_rm), control_word) )
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pop();
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}
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void fsubrp()
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{
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/* fsubrp st(i),st */
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/* This is the sense of the 80486 manual
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reg_sub(&st(FPU_rm), FPU_st0_ptr, &st(FPU_rm), control_word); */
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clear_C1();
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if ( !reg_sub(FPU_st0_ptr, &st(FPU_rm), &st(FPU_rm), control_word) )
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pop();
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}
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void fsubp_()
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{
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/* fsubp st(i),st */
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/* This is the sense of the 80486 manual
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reg_sub(FPU_st0_ptr, &st(FPU_rm), &st(FPU_rm), control_word); */
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clear_C1();
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if ( !reg_sub(&st(FPU_rm), FPU_st0_ptr, &st(FPU_rm), control_word) )
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pop();
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}
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void fdivrp()
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{
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/* fdivrp st(i),st */
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clear_C1();
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if ( !reg_div(FPU_st0_ptr, &st(FPU_rm), &st(FPU_rm), control_word) )
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pop();
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}
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void fdivp_()
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{
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/* fdivp st(i),st */
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clear_C1();
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if ( !reg_div(&st(FPU_rm), FPU_st0_ptr, &st(FPU_rm), control_word) )
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pop();
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}
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