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target/m68k: implement fsincos

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using floatx80_sin() and floatx80_cos()

Backports commit 47446c9ce34b6685ffe20e829ff6c9aaefd3af0a from qemu
This commit is contained in:
Laurent Vivier 2018-03-15 16:12:14 -04:00 committed by Lioncash
parent 478e386be9
commit a0c86a3409
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GPG key ID: 4E3C3CC1031BA9C7
3 changed files with 20 additions and 0 deletions
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11
qemu/target/m68k/fpu_helper.c
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@ -618,3 +618,14 @@ void HELPER(fcos)(CPUM68KState *env, FPReg *res, FPReg *val)
{
res->d = floatx80_cos(val->d, &env->fp_status);
}
void HELPER(fsincos)(CPUM68KState *env, FPReg *res0, FPReg *res1, FPReg *val)
{
floatx80 a = val->d;
/* If res0 and res1 specify the same floating-point data register,
* the sine result is stored in the register, and the cosine
* result is discarded.
*/
res1->d = floatx80_cos(a, &env->fp_status);
res0->d = floatx80_sin(a, &env->fp_status);
}

1
qemu/target/m68k/helper.h
View file

@ -80,6 +80,7 @@ DEF_HELPER_3(ftentox, void, env, fp, fp)
DEF_HELPER_3(ftan, void, env, fp, fp)
DEF_HELPER_3(fsin, void, env, fp, fp)
DEF_HELPER_3(fcos, void, env, fp, fp)
DEF_HELPER_4(fsincos, void, env, fp, fp, fp)
DEF_HELPER_3(mac_move, void, env, i32, i32)
DEF_HELPER_3(macmulf, i64, env, i32, i32)

8
qemu/target/m68k/translate.c
View file

@ -5393,6 +5393,14 @@ DISAS_INSN(fpu)
case 0x6c: /* fdsub */
gen_helper_fdsub(tcg_ctx, uc->cpu_env, cpu_dest, cpu_src, cpu_dest);
break;
case 0x30: case 0x31: case 0x32:
case 0x33: case 0x34: case 0x35:
case 0x36: case 0x37: {
TCGv_ptr cpu_dest2 = gen_fp_ptr(s, REG(ext, 0));
gen_helper_fsincos(tcg_ctx, uc->cpu_env, cpu_dest, cpu_dest2, cpu_src);
tcg_temp_free_ptr(tcg_ctx, cpu_dest2);
}
break;
case 0x38: /* fcmp */
gen_helper_fcmp(tcg_ctx, uc->cpu_env, cpu_src, cpu_dest);
return;