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powerpc: sstep: Add support for maddhd, maddhdu, maddld instructions

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This adds emulation support for the following integer instructions:
  * Multiply-Add High Doubleword (maddhd)
  * Multiply-Add High Doubleword Unsigned (maddhdu)
  * Multiply-Add Low Doubleword (maddld)

As suggested by Michael, this uses a raw .long for specifying the
instruction word when using inline assembly to retain compatibility
with older binutils.

Signed-off-by: Sandipan Das <sandipan@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Sandipan Das
2019-02-22 12:23:27 +05:30
committed by Michael Ellerman
parent d608898abc
commit 930d6288a2
2 changed files with 48 additions and 2 deletions
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15
arch/powerpc/include/asm/ppc-opcode.h
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@@ -335,6 +335,9 @@
#define PPC_INST_MULLW 0x7c0001d6
#define PPC_INST_MULHWU 0x7c000016
#define PPC_INST_MULLI 0x1c000000
#define PPC_INST_MADDHD 0x10000030
#define PPC_INST_MADDHDU 0x10000031
#define PPC_INST_MADDLD 0x10000033
#define PPC_INST_DIVWU 0x7c000396
#define PPC_INST_DIVD 0x7c0003d2
#define PPC_INST_RLWINM 0x54000000
@@ -377,6 +380,7 @@
/* macros to insert fields into opcodes */
#define ___PPC_RA(a) (((a) & 0x1f) << 16)
#define ___PPC_RB(b) (((b) & 0x1f) << 11)
#define ___PPC_RC(c) (((c) & 0x1f) << 6)
#define ___PPC_RS(s) (((s) & 0x1f) << 21)
#define ___PPC_RT(t) ___PPC_RS(t)
#define ___PPC_R(r) (((r) & 0x1) << 16)
@@ -396,7 +400,7 @@
#define __PPC_WS(w) (((w) & 0x1f) << 11)
#define __PPC_SH(s) __PPC_WS(s)
#define __PPC_SH64(s) (__PPC_SH(s) | (((s) & 0x20) >> 4))
#define __PPC_MB(s) (((s) & 0x1f) << 6)
#define __PPC_MB(s) ___PPC_RC(s)
#define __PPC_ME(s) (((s) & 0x1f) << 1)
#define __PPC_MB64(s) (__PPC_MB(s) | ((s) & 0x20))
#define __PPC_ME64(s) __PPC_MB64(s)
@@ -438,6 +442,15 @@
#define PPC_STQCX(t, a, b) stringify_in_c(.long PPC_INST_STQCX | \
___PPC_RT(t) | ___PPC_RA(a) | \
___PPC_RB(b))
#define PPC_MADDHD(t, a, b, c) stringify_in_c(.long PPC_INST_MADDHD | \
___PPC_RT(t) | ___PPC_RA(a) | \
___PPC_RB(b) | ___PPC_RC(c))
#define PPC_MADDHDU(t, a, b, c) stringify_in_c(.long PPC_INST_MADDHDU | \
___PPC_RT(t) | ___PPC_RA(a) | \
___PPC_RB(b) | ___PPC_RC(c))
#define PPC_MADDLD(t, a, b, c) stringify_in_c(.long PPC_INST_MADDLD | \
___PPC_RT(t) | ___PPC_RA(a) | \
___PPC_RB(b) | ___PPC_RC(c))
#define PPC_MSGSND(b) stringify_in_c(.long PPC_INST_MSGSND | \
___PPC_RB(b))
#define PPC_MSGSYNC stringify_in_c(.long PPC_INST_MSGSYNC)