motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-08 18:23:57 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

Emulate more fpu opcodes, by Magnus Damm.

Browse source 
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3002 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
ths 2007-06-22 11:12:01 +00:00
parent 6db45e6519
commit ea6cf6be8e
3 changed files with 183 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

90
target-sh4/translate.c
View file

@ -131,7 +131,13 @@ void cpu_sh4_reset(CPUSH4State * env)
#endif
env->vbr = 0;
env->pc = 0xA0000000;
env->fpscr = 0x00040001;
#if defined(CONFIG_USER_ONLY)
env->fpscr = FPSCR_PR; /* value for userspace according to the kernel */
env->fp_status.float_rounding_mode = float_round_nearest_even; /* ?! */
#else
env->fpscr = 0x00040001; /* CPU reset value according to SH4 manual */
env->fp_status.float_rounding_mode = float_round_to_zero;
#endif
env->mmucr = 0;
}
@ -238,6 +244,7 @@ static void gen_delayed_conditional_jump(DisasContext * ctx)
#define FREG(x) (ctx->fpscr & FPSCR_FR ? (x) ^ 0x10 : (x))
#define XHACK(x) ((((x) & 1 ) << 4) | ((x) & 0xe))
#define XREG(x) (ctx->fpscr & FPSCR_FR ? XHACK(x) ^ 0x10 : XHACK(x))
#define DREG(x) FREG(x) /* Assumes lsb of (x) is always 0 */
#define CHECK_NOT_DELAY_SLOT \
if (ctx->flags & (DELAY_SLOT | DELAY_SLOT_CONDITIONAL)) \
@ -768,6 +775,49 @@ void decode_opc(DisasContext * ctx)
gen_op_stfl_FT0_T1(ctx);
}
return;
case 0xf000: /* fadd Rm,Rn */
case 0xf001: /* fsub Rm,Rn */
case 0xf002: /* fmul Rm,Rn */
case 0xf003: /* fdiv Rm,Rn */
case 0xf004: /* fcmp/eq Rm,Rn */
case 0xf005: /* fcmp/gt Rm,Rn */
if (ctx->fpscr & FPSCR_PR) {
if (ctx->opcode & 0x0110)
break; /* illegal instruction */
gen_op_fmov_drN_DT1(DREG(B7_4));
gen_op_fmov_drN_DT0(DREG(B11_8));
}
else {
gen_op_fmov_frN_FT1(FREG(B7_4));
gen_op_fmov_frN_FT0(FREG(B11_8));
}
switch (ctx->opcode & 0xf00f) {
case 0xf000: /* fadd Rm,Rn */
ctx->fpscr & FPSCR_PR ? gen_op_fadd_DT() : gen_op_fadd_FT();
break;
case 0xf001: /* fsub Rm,Rn */
ctx->fpscr & FPSCR_PR ? gen_op_fsub_DT() : gen_op_fsub_FT();
break;
case 0xf002: /* fmul Rm,Rn */
ctx->fpscr & FPSCR_PR ? gen_op_fmul_DT() : gen_op_fmul_FT();
break;
case 0xf003: /* fdiv Rm,Rn */
ctx->fpscr & FPSCR_PR ? gen_op_fdiv_DT() : gen_op_fdiv_FT();
break;
case 0xf004: /* fcmp/eq Rm,Rn */
return;
case 0xf005: /* fcmp/gt Rm,Rn */
return;
}
if (ctx->fpscr & FPSCR_PR) {
gen_op_fmov_DT0_drN(DREG(B11_8));
}
else {
gen_op_fmov_FT0_frN(FREG(B11_8));
}
return;
}
switch (ctx->opcode & 0xff00) {
@ -1079,6 +1129,44 @@ void decode_opc(DisasContext * ctx)
gen_op_fmov_frN_FT0(FREG(B11_8));
gen_op_movl_FT0_fpul();
return;
case 0xf02d: /* float FPUL,FRn/DRn */
if (ctx->fpscr & FPSCR_PR) {
if (ctx->opcode & 0x0100)
break; /* illegal instruction */
gen_op_float_DT();
gen_op_fmov_DT0_drN(DREG(B11_8));
}
else {
gen_op_float_FT();
gen_op_fmov_FT0_frN(FREG(B11_8));
}
return;
case 0xf03d: /* ftrc FRm/DRm,FPUL */
if (ctx->fpscr & FPSCR_PR) {
if (ctx->opcode & 0x0100)
break; /* illegal instruction */
gen_op_fmov_drN_DT0(DREG(B11_8));
gen_op_ftrc_DT();
}
else {
gen_op_fmov_frN_FT0(FREG(B11_8));
gen_op_ftrc_FT();
}
return;
case 0xf08d: /* fldi0 FRn */
if (!(ctx->fpscr & FPSCR_PR)) {
gen_op_movl_imm_T0(0);
gen_op_fmov_T0_frN(FREG(B11_8));
return;
}
break;
case 0xf09d: /* fldi1 FRn */
if (!(ctx->fpscr & FPSCR_PR)) {
gen_op_movl_imm_T0(0x3f800000);
gen_op_fmov_T0_frN(FREG(B11_8));
return;
}
break;
}
fprintf(stderr, "unknown instruction 0x%04x at pc 0x%08x\n",