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[Qemu-devel] [PATCH 24/37] target-ppc: Introduce DFP Test Exponent
From: |
Tom Musta |
Subject: |
[Qemu-devel] [PATCH 24/37] target-ppc: Introduce DFP Test Exponent |
Date: |
Fri, 18 Apr 2014 09:50:28 -0500 |
Add emulation of the PowerPC Decimal Floating Point Test Exponent
instructions dtstex[q][.].
Signed-off-by: Tom Musta <address@hidden>
---
target-ppc/dfp_helper.c | 32 ++++++++++++++++++++++++++++++++
target-ppc/helper.h | 2 ++
target-ppc/translate.c | 4 ++++
3 files changed, 38 insertions(+), 0 deletions(-)
diff --git a/target-ppc/dfp_helper.c b/target-ppc/dfp_helper.c
index ad24d05..fa62164 100644
--- a/target-ppc/dfp_helper.c
+++ b/target-ppc/dfp_helper.c
@@ -512,3 +512,35 @@ uint32_t helper_##op(CPUPPCState *env, uint64_t *a,
uint32_t dcm) \
DFP_HELPER_TSTDG(dtstdg, 64)
DFP_HELPER_TSTDG(dtstdgq, 128)
+
+#define DFP_HELPER_TSTEX(op, size) \
+uint32_t helper_##op(CPUPPCState *env, uint64_t *a, uint64_t *b) \
+{ \
+ struct PPC_DFP dfp; \
+ int expa, expb, a_is_special, b_is_special; \
+ \
+ dfp_prepare_decimal##size(&dfp, a, b, env); \
+ \
+ expa = dfp.a.exponent; \
+ expb = dfp.b.exponent; \
+ a_is_special = decNumberIsSpecial(&dfp.a); \
+ b_is_special = decNumberIsSpecial(&dfp.b); \
+ \
+ if (a_is_special || b_is_special) { \
+ int atype = a_is_special ? (decNumberIsNaN(&dfp.a) ? 4 : 2) : 1; \
+ int btype = b_is_special ? (decNumberIsNaN(&dfp.b) ? 4 : 2) : 1; \
+ dfp.crbf = (atype ^ btype) ? 0x1 : 0x2; \
+ } else if (expa < expb) { \
+ dfp.crbf = 0x8; \
+ } else if (expa > expb) { \
+ dfp.crbf = 0x4; \
+ } else { \
+ dfp.crbf = 0x2; \
+ } \
+ \
+ dfp_run_post_processors(&dfp, DTST_PPs, ARRAY_SIZE(DTST_PPs)); \
+ return dfp.crbf; \
+}
+
+DFP_HELPER_TSTEX(dtstex, 64)
+DFP_HELPER_TSTEX(dtstexq, 128)
diff --git a/target-ppc/helper.h b/target-ppc/helper.h
index 8c0c5d5..af9d9c9 100644
--- a/target-ppc/helper.h
+++ b/target-ppc/helper.h
@@ -634,4 +634,6 @@ 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)
+DEF_HELPER_3(dtstex, i32, env, fprp, fprp)
+DEF_HELPER_3(dtstexq, i32, env, fprp, fprp)
#include "exec/def-helper.h"
diff --git a/target-ppc/translate.c b/target-ppc/translate.c
index 8df0ebc..510c2a7 100644
--- a/target-ppc/translate.c
+++ b/target-ppc/translate.c
@@ -8372,6 +8372,8 @@ GEN_DFP_BF_A_DCM(dtstdc)
GEN_DFP_BF_A_DCM(dtstdcq)
GEN_DFP_BF_A_DCM(dtstdg)
GEN_DFP_BF_A_DCM(dtstdgq)
+GEN_DFP_BF_A_B(dtstex)
+GEN_DFP_BF_A_B(dtstexq)
/*** SPE extension ***/
/* Register moves */
@@ -11315,6 +11317,8 @@ 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),
+GEN_DFP_BF_A_B(dtstex, 0x02, 0x05),
+GEN_DFP_BF_Ap_Bp(dtstexq, 0x02, 0x05),
#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)
--
1.7.1
- [Qemu-devel] [PATCH 15/37] target-ppc: Introduce DFP Helper Utilities, (continued)
- [Qemu-devel] [PATCH 15/37] target-ppc: Introduce DFP Helper Utilities, Tom Musta, 2014/04/18
- [Qemu-devel] [PATCH 14/37] target-ppc: Introduce Decoder Macros for DFP, Tom Musta, 2014/04/18
- [Qemu-devel] [PATCH 16/37] target-ppc: Introduce DFP Post Processor Utilities, Tom Musta, 2014/04/18
- [Qemu-devel] [PATCH 17/37] target-ppc: Introduce DFP Add, Tom Musta, 2014/04/18
- [Qemu-devel] [PATCH 19/37] target-ppc: Introduce DFP Multiply, Tom Musta, 2014/04/18
- [Qemu-devel] [PATCH 20/37] target-ppc: Introduce DFP Divide, Tom Musta, 2014/04/18
- [Qemu-devel] [PATCH 18/37] target-ppc: Introduce DFP Subtract, Tom Musta, 2014/04/18
- [Qemu-devel] [PATCH 21/37] target-ppc: Introduce DFP Compares, Tom Musta, 2014/04/18
- [Qemu-devel] [PATCH 22/37] target-ppc: Introduce DFP Test Data Class, Tom Musta, 2014/04/18
- [Qemu-devel] [PATCH 23/37] target-ppc: Introduce DFP Test Data Group, Tom Musta, 2014/04/18
- [Qemu-devel] [PATCH 24/37] target-ppc: Introduce DFP Test Exponent,
Tom Musta <=
- [Qemu-devel] [PATCH 25/37] target-ppc: Introduce DFP Test Significance, Tom Musta, 2014/04/18
- [Qemu-devel] [PATCH 26/37] target-ppc: Introduce DFP Quantize, Tom Musta, 2014/04/18
- [Qemu-devel] [PATCH 27/37] target-ppc: Introduce DFP Reround, Tom Musta, 2014/04/18
- [Qemu-devel] [PATCH 29/37] target-ppc: Introduce DFP Convert to Long/Extended, Tom Musta, 2014/04/18
- [Qemu-devel] [PATCH 28/37] target-ppc: Introduce DFP Round to Integer, Tom Musta, 2014/04/18
- [Qemu-devel] [PATCH 30/37] target-ppc: Introduce Round to DFP Short/Long, Tom Musta, 2014/04/18
- [Qemu-devel] [PATCH 31/37] target-ppc: Introduce DFP Convert to Fixed, Tom Musta, 2014/04/18
- [Qemu-devel] [PATCH 32/37] target-ppc: Introduce DFP Convert to Fixed, Tom Musta, 2014/04/18
- [Qemu-devel] [PATCH 33/37] target-ppc: Introduce DFP Decode DPD to BCD, Tom Musta, 2014/04/18
- [Qemu-devel] [PATCH 34/37] target-ppc: Introduce DFP Encode BCD to DPD, Tom Musta, 2014/04/18