diff options
Diffstat (limited to 'target-ppc')
| -rw-r--r-- | target-ppc/dfp_helper.c | 55 | ||||
| -rw-r--r-- | target-ppc/helper.h | 2 | ||||
| -rw-r--r-- | target-ppc/translate.c | 4 |
3 files changed, 61 insertions, 0 deletions
diff --git a/target-ppc/dfp_helper.c b/target-ppc/dfp_helper.c index fcd6fef..7f18fd9 100644 --- a/target-ppc/dfp_helper.c +++ b/target-ppc/dfp_helper.c @@ -449,3 +449,58 @@ uint32_t helper_##op(CPUPPCState *env, uint64_t *a, uint32_t dcm) \ DFP_HELPER_TSTDC(dtstdc, 64) DFP_HELPER_TSTDC(dtstdcq, 128) + +#define DFP_HELPER_TSTDG(op, size) \ +uint32_t helper_##op(CPUPPCState *env, uint64_t *a, uint32_t dcm) \ +{ \ + struct PPC_DFP dfp; \ + int minexp, maxexp, nzero_digits, nzero_idx, is_negative, is_zero, \ + is_extreme_exp, is_subnormal, is_normal, leftmost_is_nonzero, \ + match; \ + \ + dfp_prepare_decimal##size(&dfp, a, 0, env); \ + \ + if ((size) == 64) { \ + minexp = -398; \ + maxexp = 369; \ + nzero_digits = 16; \ + nzero_idx = 5; \ + } else if ((size) == 128) { \ + minexp = -6176; \ + maxexp = 6111; \ + nzero_digits = 34; \ + nzero_idx = 11; \ + } \ + \ + is_negative = decNumberIsNegative(&dfp.a); \ + is_zero = decNumberIsZero(&dfp.a); \ + is_extreme_exp = (dfp.a.exponent == maxexp) || \ + (dfp.a.exponent == minexp); \ + is_subnormal = decNumberIsSubnormal(&dfp.a, &dfp.context); \ + is_normal = decNumberIsNormal(&dfp.a, &dfp.context); \ + leftmost_is_nonzero = (dfp.a.digits == nzero_digits) && \ + (dfp.a.lsu[nzero_idx] != 0); \ + match = 0; \ + \ + match |= (dcm & 0x20) && is_zero && !is_extreme_exp; \ + match |= (dcm & 0x10) && is_zero && is_extreme_exp; \ + match |= (dcm & 0x08) && \ + (is_subnormal || (is_normal && is_extreme_exp)); \ + match |= (dcm & 0x04) && is_normal && !is_extreme_exp && \ + !leftmost_is_nonzero; \ + match |= (dcm & 0x02) && is_normal && !is_extreme_exp && \ + leftmost_is_nonzero; \ + match |= (dcm & 0x01) && decNumberIsSpecial(&dfp.a); \ + \ + if (is_negative) { \ + dfp.crbf = match ? 0xA : 0x8; \ + } else { \ + dfp.crbf = match ? 0x2 : 0x0; \ + } \ + \ + dfp_set_FPCC_from_CRBF(&dfp); \ + return dfp.crbf; \ +} + +DFP_HELPER_TSTDG(dtstdg, 64) +DFP_HELPER_TSTDG(dtstdgq, 128) diff --git a/target-ppc/helper.h b/target-ppc/helper.h index 5a1e05e..dad4b87 100644 --- a/target-ppc/helper.h +++ b/target-ppc/helper.h @@ -630,3 +630,5 @@ DEF_HELPER_3(dcmpu, i32, env, fprp, fprp) DEF_HELPER_3(dcmpuq, i32, env, fprp, fprp) DEF_HELPER_3(dtstdc, i32, env, fprp, i32) DEF_HELPER_3(dtstdcq, i32, env, fprp, i32) +DEF_HELPER_3(dtstdg, i32, env, fprp, i32) +DEF_HELPER_3(dtstdgq, i32, env, fprp, i32) diff --git a/target-ppc/translate.c b/target-ppc/translate.c index c6448e3..79b8bb2 100644 --- a/target-ppc/translate.c +++ b/target-ppc/translate.c @@ -8370,6 +8370,8 @@ GEN_DFP_BF_A_B(dcmpo) GEN_DFP_BF_A_B(dcmpoq) GEN_DFP_BF_A_DCM(dtstdc) GEN_DFP_BF_A_DCM(dtstdcq) +GEN_DFP_BF_A_DCM(dtstdg) +GEN_DFP_BF_A_DCM(dtstdgq) /*** SPE extension ***/ /* Register moves */ @@ -11311,6 +11313,8 @@ GEN_DFP_BF_A_B(dcmpo, 0x02, 0x04), GEN_DFP_BF_Ap_Bp(dcmpoq, 0x02, 0x04), GEN_DFP_BF_A_DCM(dtstdc, 0x02, 0x06), GEN_DFP_BF_Ap_DCM(dtstdcq, 0x02, 0x06), +GEN_DFP_BF_A_DCM(dtstdg, 0x02, 0x07), +GEN_DFP_BF_Ap_DCM(dtstdgq, 0x02, 0x07), #undef GEN_SPE #define GEN_SPE(name0, name1, opc2, opc3, inval0, inval1, type) \ GEN_OPCODE_DUAL(name0##_##name1, 0x04, opc2, opc3, inval0, inval1, type, PPC_NONE) |
