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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /arch/x86/math-emu/fpu_arith.c
Initial import
Diffstat (limited to 'arch/x86/math-emu/fpu_arith.c')
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diff --git a/arch/x86/math-emu/fpu_arith.c b/arch/x86/math-emu/fpu_arith.c
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+/*---------------------------------------------------------------------------+
+ | fpu_arith.c |
+ | |
+ | Code to implement the FPU register/register arithmetic instructions |
+ | |
+ | Copyright (C) 1992,1993,1997 |
+ | W. Metzenthen, 22 Parker St, Ormond, Vic 3163, Australia |
+ | E-mail billm@suburbia.net |
+ | |
+ | |
+ +---------------------------------------------------------------------------*/
+
+#include "fpu_system.h"
+#include "fpu_emu.h"
+#include "control_w.h"
+#include "status_w.h"
+
+void fadd__(void)
+{
+ /* fadd st,st(i) */
+ int i = FPU_rm;
+ clear_C1();
+ FPU_add(&st(i), FPU_gettagi(i), 0, control_word);
+}
+
+void fmul__(void)
+{
+ /* fmul st,st(i) */
+ int i = FPU_rm;
+ clear_C1();
+ FPU_mul(&st(i), FPU_gettagi(i), 0, control_word);
+}
+
+void fsub__(void)
+{
+ /* fsub st,st(i) */
+ clear_C1();
+ FPU_sub(0, FPU_rm, control_word);
+}
+
+void fsubr_(void)
+{
+ /* fsubr st,st(i) */
+ clear_C1();
+ FPU_sub(REV, FPU_rm, control_word);
+}
+
+void fdiv__(void)
+{
+ /* fdiv st,st(i) */
+ clear_C1();
+ FPU_div(0, FPU_rm, control_word);
+}
+
+void fdivr_(void)
+{
+ /* fdivr st,st(i) */
+ clear_C1();
+ FPU_div(REV, FPU_rm, control_word);
+}
+
+void fadd_i(void)
+{
+ /* fadd st(i),st */
+ int i = FPU_rm;
+ clear_C1();
+ FPU_add(&st(i), FPU_gettagi(i), i, control_word);
+}
+
+void fmul_i(void)
+{
+ /* fmul st(i),st */
+ clear_C1();
+ FPU_mul(&st(0), FPU_gettag0(), FPU_rm, control_word);
+}
+
+void fsubri(void)
+{
+ /* fsubr st(i),st */
+ clear_C1();
+ FPU_sub(DEST_RM, FPU_rm, control_word);
+}
+
+void fsub_i(void)
+{
+ /* fsub st(i),st */
+ clear_C1();
+ FPU_sub(REV | DEST_RM, FPU_rm, control_word);
+}
+
+void fdivri(void)
+{
+ /* fdivr st(i),st */
+ clear_C1();
+ FPU_div(DEST_RM, FPU_rm, control_word);
+}
+
+void fdiv_i(void)
+{
+ /* fdiv st(i),st */
+ clear_C1();
+ FPU_div(REV | DEST_RM, FPU_rm, control_word);
+}
+
+void faddp_(void)
+{
+ /* faddp st(i),st */
+ int i = FPU_rm;
+ clear_C1();
+ if (FPU_add(&st(i), FPU_gettagi(i), i, control_word) >= 0)
+ FPU_pop();
+}
+
+void fmulp_(void)
+{
+ /* fmulp st(i),st */
+ clear_C1();
+ if (FPU_mul(&st(0), FPU_gettag0(), FPU_rm, control_word) >= 0)
+ FPU_pop();
+}
+
+void fsubrp(void)
+{
+ /* fsubrp st(i),st */
+ clear_C1();
+ if (FPU_sub(DEST_RM, FPU_rm, control_word) >= 0)
+ FPU_pop();
+}
+
+void fsubp_(void)
+{
+ /* fsubp st(i),st */
+ clear_C1();
+ if (FPU_sub(REV | DEST_RM, FPU_rm, control_word) >= 0)
+ FPU_pop();
+}
+
+void fdivrp(void)
+{
+ /* fdivrp st(i),st */
+ clear_C1();
+ if (FPU_div(DEST_RM, FPU_rm, control_word) >= 0)
+ FPU_pop();
+}
+
+void fdivp_(void)
+{
+ /* fdivp st(i),st */
+ clear_C1();
+ if (FPU_div(REV | DEST_RM, FPU_rm, control_word) >= 0)
+ FPU_pop();
+}