From 400bd2e41393a783e0532321fdb369d2cc15ea26 Mon Sep 17 00:00:00 2001 From: Markos Chandras Date: Thu, 13 Aug 2015 09:56:33 +0200 Subject: [PATCH] MIPS: math-emu: Add support for the MIPS R6 RINT FPU instruction MIPS R6 introduced the following instruction: Floating-Point Round to Integral Scalar floating-point round to integral floating point value. RINT.fmt: FPR[fd] = round_int(FPR[fs]) Signed-off-by: Markos Chandras Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/10958/ Signed-off-by: Ralf Baechle --- arch/mips/math-emu/cp1emu.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/arch/mips/math-emu/cp1emu.c b/arch/mips/math-emu/cp1emu.c index 54964b372992..a348cbefe4a8 100644 --- a/arch/mips/math-emu/cp1emu.c +++ b/arch/mips/math-emu/cp1emu.c @@ -1791,6 +1791,18 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_struct *ctx, break; } + case frint_op: { + union ieee754sp fs; + + if (!cpu_has_mips_r6) + return SIGILL; + + SPFROMREG(fs, MIPSInst_FS(ir)); + rv.l = ieee754sp_tlong(fs); + rv.s = ieee754sp_flong(rv.l); + goto copcsr; + } + case fabs_op: handler.u = ieee754sp_abs; goto scopuop; @@ -2037,6 +2049,18 @@ copcsr: break; } + case frint_op: { + union ieee754dp fs; + + if (!cpu_has_mips_r6) + return SIGILL; + + DPFROMREG(fs, MIPSInst_FS(ir)); + rv.l = ieee754dp_tlong(fs); + rv.d = ieee754dp_flong(rv.l); + goto copcsr; + } + case fabs_op: handler.u = ieee754dp_abs; goto dcopuop;