This patch fixes PR target/78597 on PowerPC. The basic problem is conversion between unsigned int and _Float128 fails for 0x80000000. Both power{7,8} using simulated IEEE 128-bit floating point and power9 using hardware IEEE 128-bit failed in the same test.
I cut down the patches I had developed for 79038 that are waiting for GCC 8 to open up to include the patches that fix the problem, but don't do additional improvements (optimizing conversions between char/short and _Float128, and optimizing converting _Float128 to int/short/char and storing the result). This patch is a little on the big side, because I deleted the two functions (convert_float128_to_int and (convert_int_to_float128) that were doing the integer/_Float128 conversions, and instead implemented them directly. I also deleted the various insns that those two functions called. It only affects _Float128/__float128 conversions. I have tested this on a little endian power8 system. Bootstrap passes, and the only changes in the test suite runs were the following tests now pass: gcc.dg/torture/fp-int-convert-float128-ieee.c gcc.dg/torture/fp-int-convert-float64x.c I did not add any tests, because it was covered by existing tests. Can I check this into trunk? 2017-01-30 Michael Meissner <meiss...@linux.vnet.ibm.com> PR target/78597 PR target/79038 * config/rs6000/rs6000-protos.h (convert_float128_to_int): Delete, no longer used. (convert_int_to_float128): Likewise. * config/rs6000/rs6000.c (convert_float128_to_int): Likewise. (convert_int_to_float128): Likewise. * config/rs6000/rs6000.md (UNSPEC_IEEE128_MOVE): Likewise. (UNSPEC_IEEE128_CONVERT): Likewise. (floatsi<mode>2, FLOAT128 iterator): Bypass calling rs6000_expand_float128_convert if we have IEEE 128-bit hardware. Use local variables for IBM extended format. (fix_trunc<mode>si2, FLOAT128 iterator): Likewise. (fix_trunc<mode>si2_fprs): Likewise. (fixuns_trunc<IEEE128:mode><SDI:mode>2): Likewise. (floatuns<IEEE128:mode>2, IEEE128 iterator): Likewise. (fix<uns>_<mode>si2_hw): Rework the IEEE 128-bt hardware support to know that we can now have integers of all sizes in vector registers. (fix<uns>_<mode>di2_hw): Likewise. (float<uns>_<mode>si2_hw): Likewise. (fix_<mode>si2_hw): Likewise. (fixuns_<mode>si2_hw): Likewise. (float<uns>_<mode>di2_hw): Likewise. (float_<mode>di2_hw): Likewise. (float_<mode>si2_hw): Likewise. (floatuns_<mode>di2_hw): Likewise. (floatuns_<mode>si2_hw): Likewise. (xscvqp<su>wz_<mode>): Delete, no longer used. (xscvqp<su>dz_<mode>): Likewise. (xscv<su>dqp_<mode>): Likewise. (ieee128_mfvsrd_64bit): Likewise. (ieee128_mfvsrd_32bit): Likewise. (ieee128_mfvsrwz): Likewise. (ieee128_mtvsrw): Likewise. (ieee128_mtvsrd_64bit): Likewise. (ieee128_mtvsrd_32bit): Likewise. -- Michael Meissner, IBM IBM, M/S 2506R, 550 King Street, Littleton, MA 01460-6245, USA email: meiss...@linux.vnet.ibm.com, phone: +1 (978) 899-4797
Index: gcc/config/rs6000/rs6000-protos.h =================================================================== --- gcc/config/rs6000/rs6000-protos.h (revision 245036) +++ gcc/config/rs6000/rs6000-protos.h (working copy) @@ -57,8 +57,6 @@ extern const char *rs6000_output_move_12 extern bool rs6000_move_128bit_ok_p (rtx []); extern bool rs6000_split_128bit_ok_p (rtx []); extern void rs6000_expand_float128_convert (rtx, rtx, bool); -extern void convert_float128_to_int (rtx *, enum rtx_code); -extern void convert_int_to_float128 (rtx *, enum rtx_code); extern void rs6000_expand_vector_init (rtx, rtx); extern void paired_expand_vector_init (rtx, rtx); extern void rs6000_expand_vector_set (rtx, rtx, int); Index: gcc/config/rs6000/rs6000.c =================================================================== --- gcc/config/rs6000/rs6000.c (revision 245036) +++ gcc/config/rs6000/rs6000.c (working copy) @@ -24609,92 +24609,6 @@ rs6000_expand_float128_convert (rtx dest return; } -/* Split a conversion from __float128 to an integer type into separate insns. - OPERANDS points to the destination, source, and V2DI temporary - register. CODE is either FIX or UNSIGNED_FIX. */ - -void -convert_float128_to_int (rtx *operands, enum rtx_code code) -{ - rtx dest = operands[0]; - rtx src = operands[1]; - rtx tmp = operands[2]; - rtx cvt; - rtvec cvt_vec; - rtx cvt_unspec; - rtvec move_vec; - rtx move_unspec; - - if (GET_CODE (tmp) == SCRATCH) - tmp = gen_reg_rtx (V2DImode); - - if (MEM_P (dest)) - dest = rs6000_address_for_fpconvert (dest); - - /* Generate the actual convert insn of the form: - (set (tmp) (unspec:V2DI [(fix:SI (reg:KF))] UNSPEC_IEEE128_CONVERT)). */ - cvt = gen_rtx_fmt_e (code, GET_MODE (dest), src); - cvt_vec = gen_rtvec (1, cvt); - cvt_unspec = gen_rtx_UNSPEC (V2DImode, cvt_vec, UNSPEC_IEEE128_CONVERT); - emit_insn (gen_rtx_SET (tmp, cvt_unspec)); - - /* Generate the move insn of the form: - (set (dest:SI) (unspec:SI [(tmp:V2DI))] UNSPEC_IEEE128_MOVE)). */ - move_vec = gen_rtvec (1, tmp); - move_unspec = gen_rtx_UNSPEC (GET_MODE (dest), move_vec, UNSPEC_IEEE128_MOVE); - emit_insn (gen_rtx_SET (dest, move_unspec)); -} - -/* Split a conversion from an integer type to __float128 into separate insns. - OPERANDS points to the destination, source, and V2DI temporary - register. CODE is either FLOAT or UNSIGNED_FLOAT. */ - -void -convert_int_to_float128 (rtx *operands, enum rtx_code code) -{ - rtx dest = operands[0]; - rtx src = operands[1]; - rtx tmp = operands[2]; - rtx cvt; - rtvec cvt_vec; - rtx cvt_unspec; - rtvec move_vec; - rtx move_unspec; - rtx unsigned_flag; - - if (GET_CODE (tmp) == SCRATCH) - tmp = gen_reg_rtx (V2DImode); - - if (MEM_P (src)) - src = rs6000_address_for_fpconvert (src); - - /* Generate the move of the integer into the Altivec register of the form: - (set (tmp:V2DI) (unspec:V2DI [(src:SI) - (const_int 0)] UNSPEC_IEEE128_MOVE)). - - or: - (set (tmp:V2DI) (unspec:V2DI [(src:DI)] UNSPEC_IEEE128_MOVE)). */ - - if (GET_MODE (src) == SImode) - { - unsigned_flag = (code == UNSIGNED_FLOAT) ? const1_rtx : const0_rtx; - move_vec = gen_rtvec (2, src, unsigned_flag); - } - else - move_vec = gen_rtvec (1, src); - - move_unspec = gen_rtx_UNSPEC (V2DImode, move_vec, UNSPEC_IEEE128_MOVE); - emit_insn (gen_rtx_SET (tmp, move_unspec)); - - /* Generate the actual convert insn of the form: - (set (dest:KF) (float:KF (unspec:DI [(tmp:V2DI)] - UNSPEC_IEEE128_CONVERT))). */ - cvt_vec = gen_rtvec (1, tmp); - cvt_unspec = gen_rtx_UNSPEC (DImode, cvt_vec, UNSPEC_IEEE128_CONVERT); - cvt = gen_rtx_fmt_e (code, GET_MODE (dest), cvt_unspec); - emit_insn (gen_rtx_SET (dest, cvt)); -} - /* Emit the RTL for an sISEL pattern. */ Index: gcc/config/rs6000/rs6000.md =================================================================== --- gcc/config/rs6000/rs6000.md (revision 245036) +++ gcc/config/rs6000/rs6000.md (working copy) @@ -146,8 +146,6 @@ (define_c_enum "unspec" UNSPEC_FUSION_P9 UNSPEC_FUSION_ADDIS UNSPEC_ROUND_TO_ODD - UNSPEC_IEEE128_MOVE - UNSPEC_IEEE128_CONVERT UNSPEC_SIGNBIT UNSPEC_SF_FROM_SI UNSPEC_SI_FROM_SF @@ -7661,26 +7659,35 @@ (define_insn_and_split "trunc<mode>sf2_f "") (define_expand "floatsi<mode>2" - [(set (match_operand:FLOAT128 0 "gpc_reg_operand" "") - (float:FLOAT128 (match_operand:SI 1 "gpc_reg_operand" "")))] + [(parallel [(set (match_operand:FLOAT128 0 "gpc_reg_operand") + (float:FLOAT128 (match_operand:SI 1 "gpc_reg_operand"))) + (clobber (match_scratch:DI 2))])] "TARGET_HARD_FLOAT && (TARGET_FPRS || TARGET_E500_DOUBLE) && TARGET_LONG_DOUBLE_128" { - if (FLOAT128_IEEE_P (<MODE>mode)) - rs6000_expand_float128_convert (operands[0], operands[1], false); + rtx op0 = operands[0]; + rtx op1 = operands[1]; + + if (TARGET_FLOAT128_HW && FLOAT128_IEEE_P (<MODE>mode)) + ; + else if (FLOAT128_IEEE_P (<MODE>mode)) + { + rs6000_expand_float128_convert (op0, op1, false); + DONE; + } else { rtx tmp = gen_reg_rtx (DFmode); - expand_float (tmp, operands[1], false); + expand_float (tmp, op1, false); if (<MODE>mode == TFmode) - emit_insn (gen_extenddftf2 (operands[0], tmp)); + emit_insn (gen_extenddftf2 (op0, tmp)); else if (<MODE>mode == IFmode) - emit_insn (gen_extenddfif2 (operands[0], tmp)); + emit_insn (gen_extenddfif2 (op0, tmp)); else gcc_unreachable (); + DONE; } - DONE; }) ; fadd, but rounding towards zero. @@ -7702,17 +7709,25 @@ (define_expand "fix_trunc<mode>si2" "TARGET_HARD_FLOAT && (TARGET_FPRS || TARGET_E500_DOUBLE) && TARGET_LONG_DOUBLE_128" { - if (FLOAT128_IEEE_P (<MODE>mode)) - rs6000_expand_float128_convert (operands[0], operands[1], false); - else if (TARGET_E500_DOUBLE && <MODE>mode == TFmode) - emit_insn (gen_spe_fix_trunctfsi2 (operands[0], operands[1])); - else if (<MODE>mode == TFmode) - emit_insn (gen_fix_trunctfsi2_fprs (operands[0], operands[1])); - else if (<MODE>mode == IFmode) - emit_insn (gen_fix_truncifsi2_fprs (operands[0], operands[1])); + rtx op0 = operands[0]; + rtx op1 = operands[1]; + + if (TARGET_FLOAT128_HW && FLOAT128_IEEE_P (<MODE>mode)) + ; else - gcc_unreachable (); - DONE; + { + if (FLOAT128_IEEE_P (<MODE>mode)) + rs6000_expand_float128_convert (op0, op1, false); + else if (TARGET_E500_DOUBLE && <MODE>mode == TFmode) + emit_insn (gen_spe_fix_trunctfsi2 (op0, op1)); + else if (<MODE>mode == TFmode) + emit_insn (gen_fix_trunctfsi2_fprs (op0, op1)); + else if (<MODE>mode == IFmode) + emit_insn (gen_fix_truncifsi2_fprs (op0, op1)); + else + gcc_unreachable (); + DONE; + } }) (define_expand "fix_trunc<mode>si2_fprs" @@ -7760,8 +7775,11 @@ (define_expand "fix_trunc<mode>di2" (fix:DI (match_operand:IEEE128 1 "gpc_reg_operand" "")))] "TARGET_FLOAT128_TYPE" { - rs6000_expand_float128_convert (operands[0], operands[1], false); - DONE; + if (!TARGET_FLOAT128_HW) + { + rs6000_expand_float128_convert (operands[0], operands[1], false); + DONE; + } }) (define_expand "fixuns_trunc<IEEE128:mode><SDI:mode>2" @@ -7778,16 +7796,37 @@ (define_expand "floatdi<mode>2" (float:IEEE128 (match_operand:DI 1 "gpc_reg_operand" "")))] "TARGET_FLOAT128_TYPE" { - rs6000_expand_float128_convert (operands[0], operands[1], false); - DONE; + if (!TARGET_FLOAT128_HW) + { + rs6000_expand_float128_convert (operands[0], operands[1], false); + DONE; + } }) -(define_expand "floatuns<SDI:mode><IEEE128:mode>2" +(define_expand "floatunsdi<IEEE128:mode>2" [(set (match_operand:IEEE128 0 "gpc_reg_operand" "") - (unsigned_float:IEEE128 (match_operand:SDI 1 "gpc_reg_operand" "")))] + (unsigned_float:IEEE128 (match_operand:DI 1 "gpc_reg_operand" "")))] "TARGET_FLOAT128_TYPE" { - rs6000_expand_float128_convert (operands[0], operands[1], true); + if (!TARGET_FLOAT128_HW) + { + rs6000_expand_float128_convert (operands[0], operands[1], true); + DONE; + } +}) + +(define_expand "floatuns<IEEE128:mode>2" + [(set (match_operand:IEEE128 0 "gpc_reg_operand" "") + (unsigned_float:IEEE128 (match_operand:SI 1 "gpc_reg_operand" "")))] + "TARGET_FLOAT128_TYPE" +{ + rtx op0 = operands[0]; + rtx op1 = operands[1]; + + if (TARGET_FLOAT128_HW) + emit_insn (gen_floatuns_<IEEE128:mode>si2_hw (op0, op1)); + else + rs6000_expand_float128_convert (op0, op1, true); DONE; }) @@ -14321,170 +14360,102 @@ (define_insn_and_split "trunc<mode>sf2_h [(set_attr "type" "vecfloat") (set_attr "length" "8")]) -;; At present SImode is not allowed in VSX registers at all, and DImode is only -;; allowed in the traditional floating point registers. Use V2DImode so that -;; we can get a value in an Altivec register. - -(define_insn_and_split "fix<uns>_<mode>si2_hw" - [(set (match_operand:SI 0 "nonimmediate_operand" "=r,Z") - (any_fix:SI (match_operand:IEEE128 1 "altivec_register_operand" "v,v"))) - (clobber (match_scratch:V2DI 2 "=v,v"))] +;; Conersion between IEEE 128-bit and integer types +(define_insn "fix_<mode>di2_hw" + [(set (match_operand:DI 0 "altivec_register_operand" "=v") + (fix:DI (match_operand:IEEE128 1 "altivec_register_operand" "v")))] "TARGET_FLOAT128_HW && FLOAT128_IEEE_P (<MODE>mode)" - "#" - "&& 1" - [(pc)] -{ - convert_float128_to_int (operands, <CODE>); - DONE; -} - [(set_attr "length" "8") - (set_attr "type" "mftgpr,fpstore")]) + "xscvqpsdz %0,%1" + [(set_attr "type" "vecfloat") + (set_attr "size" "128")]) -(define_insn_and_split "fix<uns>_<mode>di2_hw" - [(set (match_operand:DI 0 "nonimmediate_operand" "=wr,wi,Z") - (any_fix:DI (match_operand:IEEE128 1 "altivec_register_operand" "v,v,v"))) - (clobber (match_scratch:V2DI 2 "=v,v,v"))] +(define_insn "fixuns_<mode>di2_hw" + [(set (match_operand:DI 0 "altivec_register_operand" "=v") + (unsigned_fix:DI (match_operand:IEEE128 1 "altivec_register_operand" "v")))] "TARGET_FLOAT128_HW && FLOAT128_IEEE_P (<MODE>mode)" - "#" - "&& 1" - [(pc)] -{ - convert_float128_to_int (operands, <CODE>); - DONE; -} - [(set_attr "length" "8") - (set_attr "type" "mftgpr,vecsimple,fpstore")]) + "xscvqpudz %0,%1" + [(set_attr "type" "vecfloat") + (set_attr "size" "128")]) -(define_insn_and_split "float<uns>_<mode>si2_hw" - [(set (match_operand:IEEE128 0 "altivec_register_operand" "=v,v") - (any_float:IEEE128 (match_operand:SI 1 "nonimmediate_operand" "r,Z"))) - (clobber (match_scratch:V2DI 2 "=v,v"))] +(define_insn "fix_<mode>si2_hw" + [(set (match_operand:SI 0 "altivec_register_operand" "=v") + (fix:SI (match_operand:IEEE128 1 "altivec_register_operand" "v")))] "TARGET_FLOAT128_HW && FLOAT128_IEEE_P (<MODE>mode)" - "#" - "&& 1" - [(pc)] -{ - convert_int_to_float128 (operands, <CODE>); - DONE; -} - [(set_attr "length" "8") - (set_attr "type" "vecfloat")]) + "xscvqpswz %0,%1" + [(set_attr "type" "vecfloat") + (set_attr "size" "128")]) + +(define_insn "fixuns_<mode>si2_hw" + [(set (match_operand:SI 0 "altivec_register_operand" "=v") + (unsigned_fix:SI (match_operand:IEEE128 1 "altivec_register_operand" "v")))] + "TARGET_FLOAT128_HW && FLOAT128_IEEE_P (<MODE>mode)" + "xscvqpuwz %0,%1" + [(set_attr "type" "vecfloat") + (set_attr "size" "128")]) -(define_insn_and_split "float<uns>_<mode>di2_hw" - [(set (match_operand:IEEE128 0 "altivec_register_operand" "=v,v,v") - (any_float:IEEE128 (match_operand:DI 1 "nonimmediate_operand" "wi,wr,Z"))) - (clobber (match_scratch:V2DI 2 "=v,v,v"))] +;; Combiner pattern to prevent moving the result of converting an IEEE 128-bit +;; floating point value to 32-bit integer to GPR in order to save it. +(define_insn_and_split "*fix<uns>_<mode>_mem" + [(set (match_operand:SI 0 "memory_operand" "=Z") + (any_fix:SI (match_operand:IEEE128 1 "altivec_register_operand" "v"))) + (clobber (match_scratch:SI 2 "=v"))] "TARGET_FLOAT128_HW && FLOAT128_IEEE_P (<MODE>mode)" "#" - "&& 1" - [(pc)] -{ - convert_int_to_float128 (operands, <CODE>); - DONE; -} - [(set_attr "length" "8") - (set_attr "type" "vecfloat")]) + "&& reload_completed" + [(set (match_dup 2) + (any_fix:SI (match_dup 1))) + (set (match_dup 0) + (match_dup 2))]) -;; Integer conversion instructions, using V2DImode to get an Altivec register -(define_insn "*xscvqp<su>wz_<mode>" - [(set (match_operand:V2DI 0 "altivec_register_operand" "=v") - (unspec:V2DI - [(any_fix:SI - (match_operand:IEEE128 1 "altivec_register_operand" "v"))] - UNSPEC_IEEE128_CONVERT))] +(define_insn "float_<mode>di2_hw" + [(set (match_operand:IEEE128 0 "altivec_register_operand" "=v") + (float:IEEE128 (match_operand:DI 1 "altivec_register_operand" "v")))] "TARGET_FLOAT128_HW && FLOAT128_IEEE_P (<MODE>mode)" - "xscvqp<su>wz %0,%1" + "xscvsdqp %0,%1" [(set_attr "type" "vecfloat") (set_attr "size" "128")]) -(define_insn "*xscvqp<su>dz_<mode>" - [(set (match_operand:V2DI 0 "altivec_register_operand" "=v") - (unspec:V2DI - [(any_fix:DI - (match_operand:IEEE128 1 "altivec_register_operand" "v"))] - UNSPEC_IEEE128_CONVERT))] +(define_insn_and_split "float_<mode>si2_hw" + [(set (match_operand:IEEE128 0 "altivec_register_operand" "=v") + (float:IEEE128 (match_operand:SI 1 "nonimmediate_operand" "vrZ"))) + (clobber (match_scratch:DI 2 "=v"))] "TARGET_FLOAT128_HW && FLOAT128_IEEE_P (<MODE>mode)" - "xscvqp<su>dz %0,%1" - [(set_attr "type" "vecfloat") - (set_attr "size" "128")]) + "#" + "&& 1" + [(set (match_dup 2) + (sign_extend:DI (match_dup 1))) + (set (match_dup 0) + (float:IEEE128 (match_dup 2)))] +{ + if (GET_CODE (operands[2]) == SCRATCH) + operands[2] = gen_reg_rtx (DImode); +}) -(define_insn "*xscv<su>dqp_<mode>" +(define_insn "floatuns_<mode>di2_hw" [(set (match_operand:IEEE128 0 "altivec_register_operand" "=v") - (any_float:IEEE128 - (unspec:DI [(match_operand:V2DI 1 "altivec_register_operand" "v")] - UNSPEC_IEEE128_CONVERT)))] + (unsigned_float:IEEE128 + (match_operand:DI 1 "altivec_register_operand" "v")))] "TARGET_FLOAT128_HW && FLOAT128_IEEE_P (<MODE>mode)" - "xscv<su>dqp %0,%1" + "xscvudqp %0,%1" [(set_attr "type" "vecfloat") (set_attr "size" "128")]) -(define_insn "*ieee128_mfvsrd_64bit" - [(set (match_operand:DI 0 "reg_or_indexed_operand" "=wr,Z,wi") - (unspec:DI [(match_operand:V2DI 1 "altivec_register_operand" "v,v,v")] - UNSPEC_IEEE128_MOVE))] - "TARGET_FLOAT128_HW && TARGET_POWERPC64" - "@ - mfvsrd %0,%x1 - stxsdx %x1,%y0 - xxlor %x0,%x1,%x1" - [(set_attr "type" "mftgpr,fpstore,veclogical")]) - - -(define_insn "*ieee128_mfvsrd_32bit" - [(set (match_operand:DI 0 "reg_or_indexed_operand" "=Z,wi") - (unspec:DI [(match_operand:V2DI 1 "altivec_register_operand" "v,v")] - UNSPEC_IEEE128_MOVE))] - "TARGET_FLOAT128_HW && !TARGET_POWERPC64" - "@ - stxsdx %x1,%y0 - xxlor %x0,%x1,%x1" - [(set_attr "type" "fpstore,veclogical")]) - -(define_insn "*ieee128_mfvsrwz" - [(set (match_operand:SI 0 "reg_or_indexed_operand" "=r,Z") - (unspec:SI [(match_operand:V2DI 1 "altivec_register_operand" "v,v")] - UNSPEC_IEEE128_MOVE))] - "TARGET_FLOAT128_HW" - "@ - mfvsrwz %0,%x1 - stxsiwx %x1,%y0" - [(set_attr "type" "mftgpr,fpstore")]) - -;; 0 says do sign-extension, 1 says zero-extension -(define_insn "*ieee128_mtvsrw" - [(set (match_operand:V2DI 0 "altivec_register_operand" "=v,v,v,v") - (unspec:V2DI [(match_operand:SI 1 "nonimmediate_operand" "r,Z,r,Z") - (match_operand:SI 2 "const_0_to_1_operand" "O,O,n,n")] - UNSPEC_IEEE128_MOVE))] - "TARGET_FLOAT128_HW" - "@ - mtvsrwa %x0,%1 - lxsiwax %x0,%y1 - mtvsrwz %x0,%1 - lxsiwzx %x0,%y1" - [(set_attr "type" "mffgpr,fpload,mffgpr,fpload")]) - - -(define_insn "*ieee128_mtvsrd_64bit" - [(set (match_operand:V2DI 0 "altivec_register_operand" "=v,v,v") - (unspec:V2DI [(match_operand:DI 1 "nonimmediate_operand" "wr,Z,wi")] - UNSPEC_IEEE128_MOVE))] - "TARGET_FLOAT128_HW && TARGET_POWERPC64" - "@ - mtvsrd %x0,%1 - lxsdx %x0,%y1 - xxlor %x0,%x1,%x1" - [(set_attr "type" "mffgpr,fpload,veclogical")]) - -(define_insn "*ieee128_mtvsrd_32bit" - [(set (match_operand:V2DI 0 "altivec_register_operand" "=v,v") - (unspec:V2DI [(match_operand:DI 1 "nonimmediate_operand" "Z,wi")] - UNSPEC_IEEE128_MOVE))] - "TARGET_FLOAT128_HW && !TARGET_POWERPC64" - "@ - lxsdx %x0,%y1 - xxlor %x0,%x1,%x1" - [(set_attr "type" "fpload,veclogical")]) +(define_insn_and_split "floatuns_<mode>si2_hw" + [(set (match_operand:IEEE128 0 "altivec_register_operand" "=v") + (unsigned_float:IEEE128 + (match_operand:SI 1 "nonimmediate_operand" "vrZ"))) + (clobber (match_scratch:DI 2 "=v"))] + "TARGET_FLOAT128_HW && FLOAT128_IEEE_P (<MODE>mode)" + "#" + "&& 1" + [(set (match_dup 2) + (zero_extend:DI (match_dup 1))) + (set (match_dup 0) + (float:IEEE128 (match_dup 2)))] +{ + if (GET_CODE (operands[2]) == SCRATCH) + operands[2] = gen_reg_rtx (DImode); +}) ;; IEEE 128-bit instructions with round to odd semantics (define_insn "*trunc<mode>df2_odd"