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[PATCH 6/7] target/ppc: use existing VsrD() macro to eliminate HI_IDX an
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From: |
Mark Cave-Ayland |
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Subject: |
[PATCH 6/7] target/ppc: use existing VsrD() macro to eliminate HI_IDX and LO_IDX from dfp_helper.c |
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Date: |
Tue, 24 Sep 2019 16:35:55 +0100 |
Switch over all accesses to the decimal numbers held in struct PPC_DFP from
using HI_IDX and LO_IDX to using the VsrD() macro instead. Not only does this
allow the compiler to ensure that the various dfp_* functions are being passed
a ppc_vsr_t rather than an arbitrary uint64_t pointer, but also allows the
host endian-specific HI_IDX and LO_IDX to be completely removed from
dfp_helper.c.
Signed-off-by: Mark Cave-Ayland <address@hidden>
---
target/ppc/dfp_helper.c | 70 ++++++++++++++++++-----------------------
1 file changed, 31 insertions(+), 39 deletions(-)
diff --git a/target/ppc/dfp_helper.c b/target/ppc/dfp_helper.c
index ed437f97da..c2d335e928 100644
--- a/target/ppc/dfp_helper.c
+++ b/target/ppc/dfp_helper.c
@@ -28,13 +28,6 @@
#include "libdecnumber/dpd/decimal64.h"
#include "libdecnumber/dpd/decimal128.h"
-#if defined(HOST_WORDS_BIGENDIAN)
-#define HI_IDX 0
-#define LO_IDX 1
-#else
-#define HI_IDX 1
-#define LO_IDX 0
-#endif
static void get_dfp64(ppc_vsr_t *dst, ppc_fprp_t *dfp)
{
@@ -1039,31 +1032,31 @@ void helper_##op(CPUPPCState *env, ppc_fprp_t *t,
ppc_fprp_t *b) \
DFP_HELPER_CTFIX(dctfix, 64)
DFP_HELPER_CTFIX(dctfixq, 128)
-static inline void dfp_set_bcd_digit_64(uint64_t *t, uint8_t digit,
- unsigned n)
+static inline void dfp_set_bcd_digit_64(ppc_vsr_t *t, uint8_t digit,
+ unsigned n)
{
- *t |= ((uint64_t)(digit & 0xF) << (n << 2));
+ t->VsrD(1) |= ((uint64_t)(digit & 0xF) << (n << 2));
}
-static inline void dfp_set_bcd_digit_128(uint64_t *t, uint8_t digit,
- unsigned n)
+static inline void dfp_set_bcd_digit_128(ppc_vsr_t *t, uint8_t digit,
+ unsigned n)
{
- t[(n & 0x10) ? HI_IDX : LO_IDX] |=
+ t->VsrD((n & 0x10) ? 0 : 1) |=
((uint64_t)(digit & 0xF) << ((n & 15) << 2));
}
-static inline void dfp_set_sign_64(uint64_t *t, uint8_t sgn)
+static inline void dfp_set_sign_64(ppc_vsr_t *t, uint8_t sgn)
{
- *t <<= 4;
- *t |= (sgn & 0xF);
+ t->VsrD(1) <<= 4;
+ t->VsrD(1) |= (sgn & 0xF);
}
-static inline void dfp_set_sign_128(uint64_t *t, uint8_t sgn)
+static inline void dfp_set_sign_128(ppc_vsr_t *t, uint8_t sgn)
{
- t[HI_IDX] <<= 4;
- t[HI_IDX] |= (t[LO_IDX] >> 60);
- t[LO_IDX] <<= 4;
- t[LO_IDX] |= (sgn & 0xF);
+ t->VsrD(0) <<= 4;
+ t->VsrD(0) |= (t->VsrD(0) >> 60);
+ t->VsrD(1) <<= 4;
+ t->VsrD(1) |= (sgn & 0xF);
}
#define DFP_HELPER_DEDPD(op, size) \
@@ -1081,7 +1074,7 @@ void helper_##op(CPUPPCState *env, ppc_fprp_t *t,
ppc_fprp_t *b, \
N = dfp.b.digits; \
\
for (i = 0; (i < N) && (i < (size)/4); i++) { \
- dfp_set_bcd_digit_##size(&dfp.vt.u64[0], digits[N - i - 1], i); \
+ dfp_set_bcd_digit_##size(&dfp.vt, digits[N - i - 1], i); \
} \
\
if (sp & 2) { \
@@ -1092,7 +1085,7 @@ void helper_##op(CPUPPCState *env, ppc_fprp_t *t,
ppc_fprp_t *b, \
} else { \
sgn = ((sp & 1) ? 0xF : 0xC); \
} \
- dfp_set_sign_##size(&dfp.vt.u64[0], sgn); \
+ dfp_set_sign_##size(&dfp.vt, sgn); \
} \
\
if (size == 64) { \
@@ -1105,14 +1098,14 @@ void helper_##op(CPUPPCState *env, ppc_fprp_t *t,
ppc_fprp_t *b, \
DFP_HELPER_DEDPD(ddedpd, 64)
DFP_HELPER_DEDPD(ddedpdq, 128)
-static inline uint8_t dfp_get_bcd_digit_64(uint64_t *t, unsigned n)
+static inline uint8_t dfp_get_bcd_digit_64(ppc_vsr_t *t, unsigned n)
{
- return *t >> ((n << 2) & 63) & 15;
+ return t->VsrD(1) >> ((n << 2) & 63) & 15;
}
-static inline uint8_t dfp_get_bcd_digit_128(uint64_t *t, unsigned n)
+static inline uint8_t dfp_get_bcd_digit_128(ppc_vsr_t *t, unsigned n)
{
- return t[(n & 0x10) ? HI_IDX : LO_IDX] >> ((n << 2) & 63) & 15;
+ return t->VsrD((n & 0x10) ? 0 : 1) >> ((n << 2) & 63) & 15;
}
#define DFP_HELPER_ENBCD(op, size) \
@@ -1128,8 +1121,7 @@ void helper_##op(CPUPPCState *env, ppc_fprp_t *t,
ppc_fprp_t *b, \
decNumberZero(&dfp.t); \
\
if (s) { \
- uint8_t sgnNibble = dfp_get_bcd_digit_##size(&dfp.vb.u64[0], \
- offset++); \
+ uint8_t sgnNibble = dfp_get_bcd_digit_##size(&dfp.vb, offset++); \
switch (sgnNibble) { \
case 0xD: \
case 0xB: \
@@ -1149,7 +1141,7 @@ void helper_##op(CPUPPCState *env, ppc_fprp_t *t,
ppc_fprp_t *b, \
\
while (offset < (size) / 4) { \
n++; \
- digits[(size) / 4 - n] = dfp_get_bcd_digit_##size(&dfp.vb.u64[0], \
+ digits[(size) / 4 - n] = dfp_get_bcd_digit_##size(&dfp.vb, \
offset++); \
if (digits[(size) / 4 - n] > 10) { \
dfp_set_FPSCR_flag(&dfp, FP_VX | FP_VXCVI, FPSCR_VE); \
@@ -1212,16 +1204,16 @@ void helper_##op(CPUPPCState *env, ppc_fprp_t *t,
ppc_fprp_t *b) \
DFP_HELPER_XEX(dxex, 64)
DFP_HELPER_XEX(dxexq, 128)
-static void dfp_set_raw_exp_64(uint64_t *t, uint64_t raw)
+static void dfp_set_raw_exp_64(ppc_vsr_t *t, uint64_t raw)
{
- *t &= 0x8003ffffffffffffULL;
- *t |= (raw << (63 - 13));
+ t->VsrD(1) &= 0x8003ffffffffffffULL;
+ t->VsrD(1) |= (raw << (63 - 13));
}
-static void dfp_set_raw_exp_128(uint64_t *t, uint64_t raw)
+static void dfp_set_raw_exp_128(ppc_vsr_t *t, uint64_t raw)
{
- t[HI_IDX] &= 0x80003fffffffffffULL;
- t[HI_IDX] |= (raw << (63 - 17));
+ t->VsrD(0) &= 0x80003fffffffffffULL;
+ t->VsrD(0) |= (raw << (63 - 17));
}
#define DFP_HELPER_IEX(op, size) \
@@ -1258,11 +1250,11 @@ void helper_##op(CPUPPCState *env, ppc_fprp_t *t,
ppc_fprp_t *a, \
dfp.vt.VsrD(0) = dfp.vb.VsrD(0); \
dfp.vt.VsrD(1) = dfp.vb.VsrD(1); \
if (exp == -1) { \
- dfp_set_raw_exp_##size(&dfp.vt.u64[0], raw_inf); \
+ dfp_set_raw_exp_##size(&dfp.vt, raw_inf); \
} else if (exp == -3) { \
- dfp_set_raw_exp_##size(&dfp.vt.u64[0], raw_snan); \
+ dfp_set_raw_exp_##size(&dfp.vt, raw_snan); \
} else { \
- dfp_set_raw_exp_##size(&dfp.vt.u64[0], raw_qnan); \
+ dfp_set_raw_exp_##size(&dfp.vt, raw_qnan); \
} \
} else { \
dfp.t = dfp.b; \
--
2.20.1
[PATCH 7/7] target/ppc: remove unnecessary if() around calls to set_dfp{64, 128}() in DFP macros, Mark Cave-Ayland, 2019/09/24
[PATCH 3/7] target/ppc: update {get, set}_dfp{64, 128}() helper functions to read/write DFP numbers correctly, Mark Cave-Ayland, 2019/09/24
[PATCH 4/7] target/ppc: introduce dfp_finalize_decimal{64, 128}() helper functions, Mark Cave-Ayland, 2019/09/24