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[Qemu-devel] [PULL 039/118] target-ppc: Introduce DFP Test Significance
From: |
Alexander Graf |
Subject: |
[Qemu-devel] [PULL 039/118] target-ppc: Introduce DFP Test Significance |
Date: |
Wed, 4 Jun 2014 14:43:40 +0200 |
From: Tom Musta <address@hidden>
Add emulation of the PowerPC Decimal Floating Point Test Significance
instructions dtstsf[q][.].
Signed-off-by: Tom Musta <address@hidden>
Signed-off-by: Alexander Graf <address@hidden>
---
target-ppc/dfp_helper.c | 35 +++++++++++++++++++++++++++++++++++
target-ppc/helper.h | 2 ++
target-ppc/translate.c | 4 ++++
3 files changed, 41 insertions(+)
diff --git a/target-ppc/dfp_helper.c b/target-ppc/dfp_helper.c
index 43eb70d..574956a 100644
--- a/target-ppc/dfp_helper.c
+++ b/target-ppc/dfp_helper.c
@@ -536,3 +536,38 @@ uint32_t helper_##op(CPUPPCState *env, uint64_t *a,
uint64_t *b) \
DFP_HELPER_TSTEX(dtstex, 64)
DFP_HELPER_TSTEX(dtstexq, 128)
+
+#define DFP_HELPER_TSTSF(op, size) \
+uint32_t helper_##op(CPUPPCState *env, uint64_t *a, uint64_t *b) \
+{ \
+ struct PPC_DFP dfp; \
+ unsigned k; \
+ \
+ dfp_prepare_decimal##size(&dfp, 0, b, env); \
+ \
+ k = *a & 0x3F; \
+ \
+ if (unlikely(decNumberIsSpecial(&dfp.b))) { \
+ dfp.crbf = 1; \
+ } else if (k == 0) { \
+ dfp.crbf = 4; \
+ } else if (unlikely(decNumberIsZero(&dfp.b))) { \
+ /* Zero has no sig digits */ \
+ dfp.crbf = 4; \
+ } else { \
+ unsigned nsd = dfp.b.digits; \
+ if (k < nsd) { \
+ dfp.crbf = 8; \
+ } else if (k > nsd) { \
+ dfp.crbf = 4; \
+ } else { \
+ dfp.crbf = 2; \
+ } \
+ } \
+ \
+ dfp_set_FPCC_from_CRBF(&dfp); \
+ return dfp.crbf; \
+}
+
+DFP_HELPER_TSTSF(dtstsf, 64)
+DFP_HELPER_TSTSF(dtstsfq, 128)
diff --git a/target-ppc/helper.h b/target-ppc/helper.h
index 8ffb806..2b39d2a 100644
--- a/target-ppc/helper.h
+++ b/target-ppc/helper.h
@@ -634,3 +634,5 @@ DEF_HELPER_3(dtstdg, i32, env, fprp, i32)
DEF_HELPER_3(dtstdgq, i32, env, fprp, i32)
DEF_HELPER_3(dtstex, i32, env, fprp, fprp)
DEF_HELPER_3(dtstexq, i32, env, fprp, fprp)
+DEF_HELPER_3(dtstsf, i32, env, fprp, fprp)
+DEF_HELPER_3(dtstsfq, i32, env, fprp, fprp)
diff --git a/target-ppc/translate.c b/target-ppc/translate.c
index dbb56ab..441eea1 100644
--- a/target-ppc/translate.c
+++ b/target-ppc/translate.c
@@ -8373,6 +8373,8 @@ GEN_DFP_BF_A_DCM(dtstdg)
GEN_DFP_BF_A_DCM(dtstdgq)
GEN_DFP_BF_A_B(dtstex)
GEN_DFP_BF_A_B(dtstexq)
+GEN_DFP_BF_A_B(dtstsf)
+GEN_DFP_BF_A_B(dtstsfq)
/*** SPE extension ***/
/* Register moves */
@@ -11318,6 +11320,8 @@ GEN_DFP_BF_A_DCM(dtstdg, 0x02, 0x07),
GEN_DFP_BF_Ap_DCM(dtstdgq, 0x02, 0x07),
GEN_DFP_BF_A_B(dtstex, 0x02, 0x05),
GEN_DFP_BF_Ap_Bp(dtstexq, 0x02, 0x05),
+GEN_DFP_BF_A_B(dtstsf, 0x02, 0x15),
+GEN_DFP_BF_A_Bp(dtstsfq, 0x02, 0x15),
#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)
--
1.8.1.4
- [Qemu-devel] [PULL 023/118] libdecnumber: Introduce decNumberFrom[U]Int64, (continued)
- [Qemu-devel] [PULL 023/118] libdecnumber: Introduce decNumberFrom[U]Int64, Alexander Graf, 2014/06/04
- [Qemu-devel] [PULL 024/118] libdecnumber: Introduce decNumberIntegralToInt64, Alexander Graf, 2014/06/04
- [Qemu-devel] [PULL 016/118] libdecnumber: Eliminate #include *Symbols.h, Alexander Graf, 2014/06/04
- [Qemu-devel] [PULL 037/118] target-ppc: Introduce DFP Test Data Group, Alexander Graf, 2014/06/04
- [Qemu-devel] [PULL 032/118] target-ppc: Introduce DFP Subtract, Alexander Graf, 2014/06/04
- [Qemu-devel] [PULL 018/118] libdecnumber: Modify dconfig.h to Integrate with QEMU, Alexander Graf, 2014/06/04
- [Qemu-devel] [PULL 031/118] target-ppc: Introduce DFP Add, Alexander Graf, 2014/06/04
- [Qemu-devel] [PULL 028/118] target-ppc: Introduce Decoder Macros for DFP, Alexander Graf, 2014/06/04
- [Qemu-devel] [PULL 035/118] target-ppc: Introduce DFP Compares, Alexander Graf, 2014/06/04
- [Qemu-devel] [PULL 038/118] target-ppc: Introduce DFP Test Exponent, Alexander Graf, 2014/06/04
- [Qemu-devel] [PULL 039/118] target-ppc: Introduce DFP Test Significance,
Alexander Graf <=
- [Qemu-devel] [PULL 045/118] target-ppc: Introduce DFP Convert to Fixed, Alexander Graf, 2014/06/04
- [Qemu-devel] [PULL 043/118] target-ppc: Introduce DFP Convert to Long/Extended, Alexander Graf, 2014/06/04
- [Qemu-devel] [PULL 036/118] target-ppc: Introduce DFP Test Data Class, Alexander Graf, 2014/06/04
- [Qemu-devel] [PULL 040/118] target-ppc: Introduce DFP Quantize, Alexander Graf, 2014/06/04
- [Qemu-devel] [PULL 042/118] target-ppc: Introduce DFP Round to Integer, Alexander Graf, 2014/06/04
- [Qemu-devel] [PULL 041/118] target-ppc: Introduce DFP Reround, Alexander Graf, 2014/06/04
- [Qemu-devel] [PULL 034/118] target-ppc: Introduce DFP Divide, Alexander Graf, 2014/06/04
- [Qemu-devel] [PULL 044/118] target-ppc: Introduce Round to DFP Short/Long, Alexander Graf, 2014/06/04
- [Qemu-devel] [PULL 046/118] target-ppc: Introduce DFP Convert to Fixed, Alexander Graf, 2014/06/04
- [Qemu-devel] [PULL 054/118] util: Add AES ShiftRows and InvShiftRows Tables, Alexander Graf, 2014/06/04