aboutsummaryrefslogtreecommitdiff
path: root/target-sh4
diff options
context:
space:
mode:
authorths <ths@c046a42c-6fe2-441c-8c8c-71466251a162>2007-06-22 11:44:41 +0000
committerths <ths@c046a42c-6fe2-441c-8c8c-71466251a162>2007-06-22 11:44:41 +0000
commite67888a7da3d2fcea87dadf723ba18f8e577734a (patch)
tree684fed14afa990587b66d17087b76aad237f6337 /target-sh4
parente3d8a9858ee1669c72a2ee58ead0d2d973eb4ab6 (diff)
Document FPSCR usage, by Magnus Damm.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3004 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'target-sh4')
-rw-r--r--target-sh4/translate.c38
1 files changed, 19 insertions, 19 deletions
diff --git a/target-sh4/translate.c b/target-sh4/translate.c
index 5b35cf228e..b90d9b573a 100644
--- a/target-sh4/translate.c
+++ b/target-sh4/translate.c
@@ -647,7 +647,7 @@ void decode_opc(DisasContext * ctx)
gen_op_movl_rN_T0(REG(B7_4));
gen_op_xor_T0_rN(REG(B11_8));
return;
- case 0xf00c: /* fmov {F,D,X}Rm,{F,D,X}Rn */
+ case 0xf00c: /* fmov {F,D,X}Rm,{F,D,X}Rn - FPSCR: Nothing */
if (ctx->fpscr & FPSCR_PR) {
gen_op_fmov_drN_DT0(XREG(B7_4));
gen_op_fmov_DT0_drN(XREG(B11_8));
@@ -661,7 +661,7 @@ void decode_opc(DisasContext * ctx)
gen_op_fmov_FT0_frN(FREG(B11_8));
}
return;
- case 0xf00a: /* fmov {F,D,X}Rm,@Rn */
+ case 0xf00a: /* fmov {F,D,X}Rm,@Rn - FPSCR: Nothing */
if (ctx->fpscr & FPSCR_PR) {
gen_op_fmov_drN_DT0(XREG(B7_4));
gen_op_movl_rN_T1(REG(B11_8));
@@ -678,7 +678,7 @@ void decode_opc(DisasContext * ctx)
gen_op_stfl_FT0_T1(ctx);
}
return;
- case 0xf008: /* fmov @Rm,{F,D,X}Rn */
+ case 0xf008: /* fmov @Rm,{F,D,X}Rn - FPSCR: Nothing */
if (ctx->fpscr & FPSCR_PR) {
gen_op_movl_rN_T0(REG(B7_4));
gen_op_ldfq_T0_DT0(ctx);
@@ -695,7 +695,7 @@ void decode_opc(DisasContext * ctx)
gen_op_fmov_FT0_frN(FREG(B11_8));
}
return;
- case 0xf009: /* fmov @Rm+,{F,D,X}Rn */
+ case 0xf009: /* fmov @Rm+,{F,D,X}Rn - FPSCR: Nothing */
if (ctx->fpscr & FPSCR_PR) {
gen_op_movl_rN_T0(REG(B7_4));
gen_op_ldfq_T0_DT0(ctx);
@@ -715,7 +715,7 @@ void decode_opc(DisasContext * ctx)
gen_op_inc4_rN(REG(B7_4));
}
return;
- case 0xf00b: /* fmov {F,D,X}Rm,@-Rn */
+ case 0xf00b: /* fmov {F,D,X}Rm,@-Rn - FPSCR: Nothing */
if (ctx->fpscr & FPSCR_PR) {
gen_op_dec8_rN(REG(B11_8));
gen_op_fmov_drN_DT0(XREG(B7_4));
@@ -735,7 +735,7 @@ void decode_opc(DisasContext * ctx)
gen_op_stfl_FT0_T1(ctx);
}
return;
- case 0xf006: /* fmov @(R0,Rm),{F,D,X}Rm */
+ case 0xf006: /* fmov @(R0,Rm),{F,D,X}Rm - FPSCR: Nothing */
if (ctx->fpscr & FPSCR_PR) {
gen_op_movl_rN_T0(REG(B7_4));
gen_op_add_rN_T0(REG(0));
@@ -755,7 +755,7 @@ void decode_opc(DisasContext * ctx)
gen_op_fmov_FT0_frN(FREG(B11_8));
}
return;
- case 0xf007: /* fmov {F,D,X}Rn,@(R0,Rn) */
+ case 0xf007: /* fmov {F,D,X}Rn,@(R0,Rn) - FPSCR: Nothing */
if (ctx->fpscr & FPSCR_PR) {
gen_op_fmov_drN_DT0(XREG(B7_4));
gen_op_movl_rN_T1(REG(B11_8));
@@ -775,12 +775,12 @@ 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 */
+ case 0xf000: /* fadd Rm,Rn - FPSCR: R[PR,Enable.O/U/I]/W[Cause,Flag] */
+ case 0xf001: /* fsub Rm,Rn - FPSCR: R[PR,Enable.O/U/I]/W[Cause,Flag] */
+ case 0xf002: /* fmul Rm,Rn - FPSCR: R[PR,Enable.O/U/I]/W[Cause,Flag] */
+ case 0xf003: /* fdiv Rm,Rn - FPSCR: R[PR,Enable.O/U/I]/W[Cause,Flag] */
+ case 0xf004: /* fcmp/eq Rm,Rn - FPSCR: R[PR,Enable.V]/W[Cause,Flag] */
+ case 0xf005: /* fcmp/gt Rm,Rn - FPSCR: R[PR,Enable.V]/W[Cause,Flag] */
if (ctx->fpscr & FPSCR_PR) {
if (ctx->opcode & 0x0110)
break; /* illegal instruction */
@@ -1121,15 +1121,15 @@ void decode_opc(DisasContext * ctx)
case 0x401b: /* tas.b @Rn */
gen_op_tasb_rN(REG(B11_8));
return;
- case 0xf00d: /* fsts FPUL,FRn */
+ case 0xf00d: /* fsts FPUL,FRn - FPSCR: Nothing */
gen_op_movl_fpul_FT0();
gen_op_fmov_FT0_frN(FREG(B11_8));
return;
- case 0xf01d: /* flds FRm.FPUL */
+ case 0xf01d: /* flds FRm,FPUL - FPSCR: Nothing */
gen_op_fmov_frN_FT0(FREG(B11_8));
gen_op_movl_FT0_fpul();
return;
- case 0xf02d: /* float FPUL,FRn/DRn */
+ case 0xf02d: /* float FPUL,FRn/DRn - FPSCR: R[PR,Enable.I]/W[Cause,Flag] */
if (ctx->fpscr & FPSCR_PR) {
if (ctx->opcode & 0x0100)
break; /* illegal instruction */
@@ -1141,7 +1141,7 @@ void decode_opc(DisasContext * ctx)
gen_op_fmov_FT0_frN(FREG(B11_8));
}
return;
- case 0xf03d: /* ftrc FRm/DRm,FPUL */
+ case 0xf03d: /* ftrc FRm/DRm,FPUL - FPSCR: R[PR,Enable.V]/W[Cause,Flag] */
if (ctx->fpscr & FPSCR_PR) {
if (ctx->opcode & 0x0100)
break; /* illegal instruction */
@@ -1153,14 +1153,14 @@ void decode_opc(DisasContext * ctx)
gen_op_ftrc_FT();
}
return;
- case 0xf08d: /* fldi0 FRn */
+ case 0xf08d: /* fldi0 FRn - FPSCR: R[PR] */
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 */
+ case 0xf09d: /* fldi1 FRn - FPSCR: R[PR] */
if (!(ctx->fpscr & FPSCR_PR)) {
gen_op_movl_imm_T0(0x3f800000);
gen_op_fmov_T0_frN(FREG(B11_8));