diff options
| author | Markos Chandras <markos.chandras@imgtec.com> | 2015-08-13 07:56:29 (GMT) |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2015-09-03 10:08:12 (GMT) |
| commit | 67613f02788d73541c7c9b1c851061b8c223057b (patch) | |
| tree | 1212cdfb5cab6af325dcad759cf908d7740f2a3a /arch/mips/math-emu | |
| parent | f8c3c6717a7128f9601b20f890d658283d59561a (diff) | |
| download | linux-67613f02788d73541c7c9b1c851061b8c223057b.tar.xz | |
MIPS: math-emu: Add support for the MIPS R6 SELEQZ FPU instruction
MIPS R6 introduced the following instruction:
SELEQZ.fmt: FPR[fd] FPR[ft].bit0 ? 0 : FPR[fs]
Add support for emulating the single and double precision formats
of the said instruction.
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/10954/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/math-emu')
| -rw-r--r-- | arch/mips/math-emu/cp1emu.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/mips/math-emu/cp1emu.c b/arch/mips/math-emu/cp1emu.c index ef41fc8..02ba536 100644 --- a/arch/mips/math-emu/cp1emu.c +++ b/arch/mips/math-emu/cp1emu.c @@ -1743,6 +1743,17 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_struct *ctx, SPFROMREG(rv.s, MIPSInst_FS(ir)); break; + case fseleqz_op: + if (!cpu_has_mips_r6) + return SIGILL; + + SPFROMREG(rv.s, MIPSInst_FT(ir)); + if (rv.w & 0x1) + rv.w = 0; + else + SPFROMREG(rv.s, MIPSInst_FS(ir)); + break; + case fabs_op: handler.u = ieee754sp_abs; goto scopuop; @@ -1940,6 +1951,18 @@ copcsr: return 0; DPFROMREG(rv.d, MIPSInst_FS(ir)); break; + + case fseleqz_op: + if (!cpu_has_mips_r6) + return SIGILL; + + DPFROMREG(rv.d, MIPSInst_FT(ir)); + if (rv.l & 0x1) + rv.l = 0; + else + DPFROMREG(rv.d, MIPSInst_FS(ir)); + break; + case fabs_op: handler.u = ieee754dp_abs; goto dcopuop; |