From: Jacob Lifshay Date: Tue, 13 Jun 2023 02:26:15 +0000 (-0700) Subject: remove fcvttgs since it's redundant X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=4ddbe6cc917cd0354dfda7222923392e22d626ad;p=openpower-isa.git remove fcvttgs since it's redundant --- diff --git a/openpower/isa/fpcvt.mdwn b/openpower/isa/fpcvt.mdwn index a4993df8..097f973f 100644 --- a/openpower/isa/fpcvt.mdwn +++ b/openpower/isa/fpcvt.mdwn @@ -216,121 +216,3 @@ Special Registers Altered: CR0 (if Rc=1) SO OV OV32 (if OE=1) FPRF=0bUUUUU FR FI FX XX VXSNAN VXCV - -# [DRAFT] Floating Convert To Integer In GPR Single - -XO-Form - -* fcvttgs RT,FRB,CVM,IT (OE=0 Rc=0) -* fcvttgs. RT,FRB,CVM,IT (OE=0 Rc=1) -* fcvttgso RT,FRB,CVM,IT (OE=1 Rc=0) -* fcvttgso. RT,FRB,CVM,IT (OE=1 Rc=1) - -Pseudo-code: - - - # based on xscvdpuxws - reset_xflags() - src <- bfp_CONVERT_FROM_BFP32(SINGLE((FRB))) - switch(IT) - case(0): # Signed 32-bit - range_min <- bfp_CONVERT_FROM_SI32(0x8000_0000) - range_max <- bfp_CONVERT_FROM_SI32(0x7FFF_FFFF) - js_mask <- 0x0000_0000_FFFF_FFFF - case(1): # Unsigned 32-bit - range_min <- bfp_CONVERT_FROM_UI32(0) - range_max <- bfp_CONVERT_FROM_UI32(0xFFFF_FFFF) - js_mask <- 0x0000_0000_FFFF_FFFF - case(2): # Signed 64-bit - range_min <- bfp_CONVERT_FROM_SI64(-0x8000_0000_0000_0000) - range_max <- bfp_CONVERT_FROM_SI64(0x7FFF_FFFF_FFFF_FFFF) - js_mask <- 0xFFFF_FFFF_FFFF_FFFF - default: # Unsigned 64-bit - range_min <- bfp_CONVERT_FROM_UI64(0) - range_max <- bfp_CONVERT_FROM_UI64(0xFFFF_FFFF_FFFF_FFFF) - js_mask <- 0xFFFF_FFFF_FFFF_FFFF - if (CVM[2] = 1) | (FPSCR.RN = 0b01) then - rnd <- bfp_ROUND_TO_INTEGER_TRUNC(src) - else if FPSCR.RN = 0b00 then - rnd <- bfp_ROUND_TO_INTEGER_NEAR_EVEN(src) - else if FPSCR.RN = 0b10 then - rnd <- bfp_ROUND_TO_INTEGER_CEIL(src) - else if FPSCR.RN = 0b11 then - rnd <- bfp_ROUND_TO_INTEGER_FLOOR(src) - switch(CVM) - case(0, 1): # OpenPower semantics - if IsNaN(rnd) then - result <- si64_CONVERT_FROM_BFP(range_min) - else if bfp_COMPARE_GT(rnd, range_max) then - result <- ui64_CONVERT_FROM_BFP(range_max) - else if bfp_COMPARE_LT(rnd, range_min) then - result <- si64_CONVERT_FROM_BFP(range_min) - else if IT[1] = 1 then # Unsigned 32/64-bit - result <- ui64_CONVERT_FROM_BFP(rnd) - else # Signed 32/64-bit - result <- si64_CONVERT_FROM_BFP(rnd) - case(2, 3): # Java/Saturating semantics - if IsNaN(rnd) then - result <- [0] * 64 - else if bfp_COMPARE_GT(rnd, range_max) then - result <- ui64_CONVERT_FROM_BFP(range_max) - else if bfp_COMPARE_LT(rnd, range_min) then - result <- si64_CONVERT_FROM_BFP(range_min) - else if IT[1] = 1 then # Unsigned 32/64-bit - result <- ui64_CONVERT_FROM_BFP(rnd) - else # Signed 32/64-bit - result <- si64_CONVERT_FROM_BFP(rnd) - default: # JavaScript semantics - # CVM = 6, 7 are illegal instructions - # using a 128-bit intermediate works here because the largest type - # this instruction can convert from has 53 significand bits, and - # the largest type this instruction can convert to has 64 bits, - # and the sum of those is strictly less than the 128 bits of the - # intermediate result. - limit <- bfp_CONVERT_FROM_UI128([1] * 128) - if IsInf(rnd) | IsNaN(rnd) then - result <- [0] * 64 - else if bfp_COMPARE_GT(bfp_ABSOLUTE(rnd), limit) then - result <- [0] * 64 - else - result128 <- si128_CONVERT_FROM_BFP(rnd) - result <- result128[64:127] & js_mask - switch(IT) - case(0): # Signed 32-bit - result <- EXTS64(result[32:63]) - result_bfp <- bfp_CONVERT_FROM_SI32(result[32:63]) - case(1): # Unsigned 32-bit - result <- EXTZ64(result[32:63]) - result_bfp <- bfp_CONVERT_FROM_UI32(result[32:63]) - case(2): # Signed 64-bit - result_bfp <- bfp_CONVERT_FROM_SI64(result) - default: # Unsigned 64-bit - result_bfp <- bfp_CONVERT_FROM_UI64(result) - overflow <- 0 # signals SO only when OE = 1 - if IsNaN(src) | ¬bfp_COMPARE_EQ(rnd, result_bfp) then - overflow <- 1 # signals SO only when OE = 1 - vxcvi_flag <- 1 - xx_flag <- 0 - inc_flag <- 0 - else - xx_flag <- ¬bfp_COMPARE_EQ(src, result_bfp) - inc_flag <- bfp_COMPARE_GT(bfp_ABSOLUTE(result_bfp), bfp_ABSOLUTE(src)) - if vxsnan_flag = 1 then SetFX(FPSCR.VXSNAN) - if vxcvi_flag = 1 then SetFX(FPSCR.VXCVI) - if xx_flag = 1 then SetFX(FPSCR.XX) - vx_flag <- vxsnan_flag | vxcvi_flag - vex_flag <- FPSCR.VE & vx_flag - if vex_flag = 0 then - RT <- result - FPSCR.FPRF <- undefined(0b00000) - FPSCR.FR <- inc_flag - FPSCR.FI <- xx_flag - else - FPSCR.FR <- 0 - FPSCR.FI <- 0 - -Special Registers Altered: - - CR0 (if Rc=1) - SO OV OV32 (if OE=1) - FPRF=0bUUUUU FR FI FX XX VXSNAN VXCV diff --git a/openpower/isatables/RM-2P-1S1D.csv b/openpower/isatables/RM-2P-1S1D.csv index 3c29a69b..58859975 100644 --- a/openpower/isatables/RM-2P-1S1D.csv +++ b/openpower/isatables/RM-2P-1S1D.csv @@ -41,7 +41,6 @@ extsw,NORMAL,,2P,EXTRA3,EN,d:RA;d:CR0,s:RS,0,0,RS,0,0,RA,0,CR0,0 fsqrts,NORMAL,,2P,EXTRA3,EN,d:FRT;d:CR1,s:FRB,0,0,0,FRB,0,FRT,0,CR1,0 fres,NORMAL,,2P,EXTRA3,EN,d:FRT;d:CR1,s:FRB,0,0,0,FRB,0,FRT,0,CR1,0 frsqrtes,NORMAL,,2P,EXTRA3,EN,d:FRT;d:CR1,s:FRB,0,0,0,FRB,0,FRT,0,CR1,0 -fcvttgs,NORMAL,,2P,EXTRA3,EN,d:RT;d:CR0,s:FRB,0,0,0,FRB,0,RT,0,CR0,0 fcbrts,NORMAL,,2P,EXTRA3,EN,d:FRT;d:CR1,s:FRB,0,0,0,FRB,0,FRT,0,CR1,0 fsinpis,NORMAL,,2P,EXTRA3,EN,d:FRT;d:CR1,s:FRB,0,0,0,FRB,0,FRT,0,CR1,0 fasinpis,NORMAL,,2P,EXTRA3,EN,d:FRT;d:CR1,s:FRB,0,0,0,FRB,0,FRT,0,CR1,0 @@ -65,7 +64,6 @@ facoshs,NORMAL,,2P,EXTRA3,EN,d:FRT;d:CR1,s:FRB,0,0,0,FRB,0,FRT,0,CR1,0 fatanhs,NORMAL,,2P,EXTRA3,EN,d:FRT;d:CR1,s:FRB,0,0,0,FRB,0,FRT,0,CR1,0 fexp2m1s,NORMAL,,2P,EXTRA3,EN,d:FRT;d:CR1,s:FRB,0,0,0,FRB,0,FRT,0,CR1,0 flog2p1s,NORMAL,,2P,EXTRA3,EN,d:FRT;d:CR1,s:FRB,0,0,0,FRB,0,FRT,0,CR1,0 -fcvttgso,NORMAL,,2P,EXTRA3,EN,d:RT;d:CR0,s:FRB,0,0,0,FRB,0,RT,0,CR0,0 fcvtfgs,NORMAL,,2P,EXTRA3,EN,d:FRT;d:CR1,s:RB,0,0,0,RB,0,FRT,0,CR1,0 fexpm1s,NORMAL,,2P,EXTRA3,EN,d:FRT;d:CR1,s:FRB,0,0,0,FRB,0,FRT,0,CR1,0 flogp1s,NORMAL,,2P,EXTRA3,EN,d:FRT;d:CR1,s:FRB,0,0,0,FRB,0,FRT,0,CR1,0 diff --git a/openpower/isatables/minor_59.csv b/openpower/isatables/minor_59.csv index 2b4fb6e2..06e5e948 100644 --- a/openpower/isatables/minor_59.csv +++ b/openpower/isatables/minor_59.csv @@ -80,8 +80,6 @@ opcode,unit,internal op,in1,in2,in3,out,CR in,CR out,inv A,inv out,cry in,cry ou # 1111101111,FPU,OP_FPOP,FRA,FRB,NONE,FRT,NONE,CR1,0,0,ZERO,0,NONE,0,0,0,0,1,0,RC_ONLY,0,0,fmaxmagcs,X,,1,unofficial until submitted and approved/renumbered by the opf isa wg 1101001111,FPU,OP_FPOP,FRA,FRB,NONE,FRT,NONE,CR1,0,0,ZERO,0,NONE,0,0,0,0,1,0,RC_ONLY,0,0,fmods,X,,1,unofficial until submitted and approved/renumbered by the opf isa wg 1111001111,FPU,OP_FPOP,FRA,FRB,NONE,FRT,NONE,CR1,0,0,ZERO,0,NONE,0,0,0,0,1,0,RC_ONLY,0,0,fremainders,X,,1,unofficial until submitted and approved/renumbered by the opf isa wg -0100001110,FPU,OP_FPOP,NONE,FRB,NONE,RT,NONE,CR0,0,0,ZERO,0,NONE,0,0,0,0,0,0,RC,0,0,fcvttgs,XO,,1,unofficial until submitted and approved/renumbered by the opf isa wg -1100001110,FPU,OP_FPOP,NONE,FRB,NONE,RT,NONE,CR0,0,0,ZERO,0,NONE,0,0,0,0,0,0,RC,0,0,fcvttgso,XO,,1,unofficial until submitted and approved/renumbered by the opf isa wg 1110001110,FPU,OP_FPOP,NONE,FRB,NONE,RT,NONE,CR0,0,0,ZERO,0,NONE,0,0,0,0,0,0,RC_ONLY,0,0,fmvtgs,X,,1,unofficial until submitted and approved/renumbered by the opf isa wg 1100001111,FPU,OP_FPOP,NONE,RB,NONE,FRT,NONE,CR1,0,0,ZERO,0,NONE,0,0,0,0,0,0,RC_ONLY,0,0,fcvtfgs,X,,1,unofficial until submitted and approved/renumbered by the opf isa wg 1110001111,FPU,OP_FPOP,NONE,RB,NONE,FRT,NONE,CR1,0,0,ZERO,0,NONE,0,0,0,0,0,0,RC_ONLY,0,0,fmvfgs,X,,1,unofficial until submitted and approved/renumbered by the opf isa wg diff --git a/src/openpower/decoder/isa/caller.py b/src/openpower/decoder/isa/caller.py index 308dc9bd..56560433 100644 --- a/src/openpower/decoder/isa/caller.py +++ b/src/openpower/decoder/isa/caller.py @@ -1955,7 +1955,7 @@ class ISACaller(ISACallerHelper, ISAFPHelpers, StepLoop): 'fmvis', 'fishmv', 'pcdec', "maddedu", "divmod2du", "dsld", "dsrd", "maddedus", "sadd", "saddw", "sadduw", - "fcvttg", "fcvttgo", "fcvttgs", "fcvttgso", + "fcvttg", "fcvttgo", "fmvtg", "fmvtgs", "fcvtfg", "fcvtfgs", "fmvfg", "fmvfgs", diff --git a/src/openpower/decoder/power_enums.py b/src/openpower/decoder/power_enums.py index c2f74846..6e32fb99 100644 --- a/src/openpower/decoder/power_enums.py +++ b/src/openpower/decoder/power_enums.py @@ -777,7 +777,7 @@ _insns = [ "fmr", "fabs", "fnabs", "fneg", "fcpsgn", # FP move/abs/neg "fmvis", # FP load immediate "fishmv", # Float Replace Lower-Half Single, Immediate - "fcvttg", "fcvttgo", "fcvttgs", "fcvttgso", + "fcvttg", "fcvttgo", "fmvtg", "fmvtgs", "fcvtfg", "fcvtfgs", "fmvfg", "fmvfgs",