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Commit 400bd2e4 authored by Markos Chandras's avatar Markos Chandras Committed by Ralf Baechle
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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: default avatarMarkos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/10958/


Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 83d43305

arch/mips/math-emu/cp1emu.c

+24 −0
Original line number Diff line number Diff line
@@ -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 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_struct *ctx, 
			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;