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| author | Taylor Simpson | 2022-02-10 03:15:49 +0100 |
|---|---|---|
| committer | Taylor Simpson | 2022-03-12 18:14:22 +0100 |
| commit | 77ccf44453a83e17cc830df700cc072f6bcf6a71 (patch) | |
| tree | d9a8eb468926fa6f1796833b857b19058e24264a /target/hexagon | |
| parent | Hexagon (target/hexagon) properly set FPINVF bit in sfcmp.uo and dfcmp.uo (diff) | |
| download | qemu-77ccf44453a83e17cc830df700cc072f6bcf6a71.tar.gz qemu-77ccf44453a83e17cc830df700cc072f6bcf6a71.tar.xz qemu-77ccf44453a83e17cc830df700cc072f6bcf6a71.zip | |
Hexagon (target/hexagon) properly handle denorm in arch_sf_recip_common
The arch_sf_recip_common function was calling float32_getexp which
adjusts for denorm, but the we actually need the raw exponent bits.
This function is called from 3 instructions
sfrecipa
sffixupn
sffixupd
Test cases added to tests/tcg/hexagon/fpstuff.c
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Message-Id: <20220210021556.9217-6-tsimpson@quicinc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'target/hexagon')
| -rw-r--r-- | target/hexagon/arch.c | 6 | ||||
| -rw-r--r-- | target/hexagon/fma_emu.h | 6 |
2 files changed, 8 insertions, 4 deletions
diff --git a/target/hexagon/arch.c b/target/hexagon/arch.c index 68a55b3bd4..da79b41c4d 100644 --- a/target/hexagon/arch.c +++ b/target/hexagon/arch.c @@ -1,5 +1,5 @@ /* - * Copyright(c) 2019-2021 Qualcomm Innovation Center, Inc. All Rights Reserved. + * Copyright(c) 2019-2022 Qualcomm Innovation Center, Inc. All Rights Reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -298,8 +298,8 @@ int arch_sf_recip_common(float32 *Rs, float32 *Rt, float32 *Rd, int *adjust, } else { PeV = 0x00; /* Basic checks passed */ - n_exp = float32_getexp(RsV); - d_exp = float32_getexp(RtV); + n_exp = float32_getexp_raw(RsV); + d_exp = float32_getexp_raw(RtV); if ((n_exp - d_exp + SF_BIAS) <= SF_MANTBITS) { /* Near quotient underflow / inexact Q */ PeV = 0x80; diff --git a/target/hexagon/fma_emu.h b/target/hexagon/fma_emu.h index e3b99a8cf4..91591d6050 100644 --- a/target/hexagon/fma_emu.h +++ b/target/hexagon/fma_emu.h @@ -1,5 +1,5 @@ /* - * Copyright(c) 2019-2021 Qualcomm Innovation Center, Inc. All Rights Reserved. + * Copyright(c) 2019-2022 Qualcomm Innovation Center, Inc. All Rights Reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -24,6 +24,10 @@ static inline bool is_finite(float64 x) } int32_t float64_getexp(float64 f64); +static inline uint32_t float32_getexp_raw(float32 f32) +{ + return extract32(f32, 23, 8); +} int32_t float32_getexp(float32 f32); float32 infinite_float32(uint8_t sign); float32 internal_fmafx(float32 a, float32 b, float32 c, |